@metamask/network-controller - npm Package Compare versions

Comparing version 34.0.0 to 35.0.0

dist/rpc-service-analytics.cjs

+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.trackRpcServiceDegraded = exports.trackRpcServiceUnavailable = exports.buildRpcServiceDegradedAnalyticsTrackingEvent = exports.buildRpcServiceUnavailableAnalyticsTrackingEvent = exports.sanitizeRpcEndpointUrl = void 0;
+const remote_feature_flag_controller_1 = require("@metamask/remote-feature-flag-controller");
+const utils_1 = require("@metamask/utils");
+const rpc_service_js_1 = require("./rpc-service/rpc-service.cjs");
+/**
+ * Hides any API key contained in an RPC endpoint URL by reducing it to its
+ * host, but only when the endpoint is considered public. Non-public endpoints
+ * (and URLs that cannot be parsed) are reported as the literal string
+ * `'custom'`.
+ *
+ * @param endpointUrl - The URL of the RPC endpoint.
+ * @param isPublic - Whether the endpoint is safe to report verbatim.
+ * @returns The sanitized value to report.
+ */
+function sanitizeRpcEndpointUrl(endpointUrl, isPublic) {
+    if (!isPublic) {
+        return 'custom';
+    }
+    try {
+        return new URL(endpointUrl).host;
+    }
+    catch {
+        return 'custom';
+    }
+}
+exports.sanitizeRpcEndpointUrl = sanitizeRpcEndpointUrl;
+/**
+ * Wraps a name and properties into the shape expected by the
+ * `AnalyticsController:trackEvent` action.
+ *
+ * @param name - The analytics event name.
+ * @param properties - The analytics event properties.
+ * @returns The analytics tracking event.
+ */
+function toAnalyticsTrackingEvent(name, properties) {
+    return {
+        name,
+        properties,
+        sensitiveProperties: {},
+        saveDataRecording: false,
+        hasProperties: Object.keys(properties).length > 0,
+    };
+}
+/**
+ * Builds the properties common to both RPC service events.
+ *
+ * @param args - The arguments.
+ * @param args.chainId - The chain ID that the endpoint represents.
+ * @param args.endpointUrl - The URL of the endpoint.
+ * @param args.error - The connection or response error encountered.
+ * @param args.isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe
+ * to report verbatim.
+ * @returns The common analytics event properties.
+ */
+function buildCommonRpcServiceEventProperties({ chainId, endpointUrl, error, isRpcEndpointUrlPublic, }) {
+    const sanitizedUrl = sanitizeRpcEndpointUrl(endpointUrl, isRpcEndpointUrlPublic(endpointUrl));
+    // The names of analytics properties have a particular case.
+    return {
+        chain_id_caip: `eip155:${(0, utils_1.hexToNumber)(chainId)}`,
+        rpc_domain: sanitizedUrl,
+        rpc_endpoint_url: sanitizedUrl, // @deprecated - Will be removed in a future release.
+        ...((0, utils_1.isObject)(error) &&
+            (0, utils_1.hasProperty)(error, 'httpStatus') &&
+            (0, utils_1.isValidJson)(error.httpStatus)
+            ? { http_status: error.httpStatus }
+            : {}),
+    };
+}
+/**
+ * Builds the "RPC Service Unavailable" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+function buildRpcServiceUnavailableAnalyticsTrackingEvent(payload, isRpcEndpointUrlPublic) {
+    return toAnalyticsTrackingEvent('RPC Service Unavailable', buildCommonRpcServiceEventProperties({
+        chainId: payload.chainId,
+        endpointUrl: payload.endpointUrl,
+        error: payload.error,
+        isRpcEndpointUrlPublic,
+    }));
+}
+exports.buildRpcServiceUnavailableAnalyticsTrackingEvent = buildRpcServiceUnavailableAnalyticsTrackingEvent;
+/**
+ * Builds the "RPC Service Degraded" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+function buildRpcServiceDegradedAnalyticsTrackingEvent(payload, isRpcEndpointUrlPublic) {
+    const { duration, retryReason, rpcMethodName, traceId, type } = payload;
+    // The names of analytics properties have a particular case.
+    return toAnalyticsTrackingEvent('RPC Service Degraded', {
+        ...buildCommonRpcServiceEventProperties({
+            chainId: payload.chainId,
+            endpointUrl: payload.endpointUrl,
+            error: payload.error,
+            isRpcEndpointUrlPublic,
+        }),
+        rpc_method_name: rpcMethodName,
+        type,
+        ...(retryReason ? { retry_reason: retryReason } : {}),
+        ...(duration === undefined ? {} : { duration_ms: duration }),
+        ...(traceId === undefined ? {} : { trace_id: traceId }),
+    });
+}
+exports.buildRpcServiceDegradedAnalyticsTrackingEvent = buildRpcServiceDegradedAnalyticsTrackingEvent;
+/**
+ * Delivers an RPC service analytics event via the
+ * `AnalyticsController:trackEvent` action, skipping local connection errors,
+ * users without an analytics ID, and events that fall outside the configured
+ * sample. Failures never propagate to the caller.
+ *
+ * @param args - The arguments.
+ * @param args.messenger - The controller messenger.
+ * @param args.analyticsOptions - The analytics configuration.
+ * @param args.error - The error encountered, used to skip local connection errors.
+ * @param args.buildTrackingEvent - Builds the event to deliver. Called lazily
+ * inside the `try` so that a throw from the client's `isRpcEndpointUrlPublic` is
+ * captured rather than propagated, and so the event is not built when it will
+ * not be sent.
+ */
+function trackRpcServiceEvent({ messenger, analyticsOptions, error, buildTrackingEvent, }) {
+    try {
+        if ((0, rpc_service_js_1.isConnectionError)(error)) {
+            return;
+        }
+        const { analyticsId } = messenger.call('AnalyticsController:getState');
+        if (!analyticsId) {
+            return;
+        }
+        if ((0, remote_feature_flag_controller_1.generateDeterministicRandomNumber)(analyticsId) >=
+            analyticsOptions.rpcServiceEventsSampleRate) {
+            return;
+        }
+        messenger.call('AnalyticsController:trackEvent', buildTrackingEvent());
+    }
+    catch (caughtError) {
+        messenger.captureException?.((0, utils_1.wrapError)(caughtError, 'Could not create analytics event'));
+    }
+}
+/**
+ * Emits an "RPC Service Unavailable" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ */
+function trackRpcServiceUnavailable(messenger, analyticsOptions, payload) {
+    trackRpcServiceEvent({
+        messenger,
+        analyticsOptions,
+        error: payload.error,
+        buildTrackingEvent: () => buildRpcServiceUnavailableAnalyticsTrackingEvent(payload, analyticsOptions.isRpcEndpointUrlPublic),
+    });
+}
+exports.trackRpcServiceUnavailable = trackRpcServiceUnavailable;
+/**
+ * Emits an "RPC Service Degraded" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ */
+function trackRpcServiceDegraded(messenger, analyticsOptions, payload) {
+    trackRpcServiceEvent({
+        messenger,
+        analyticsOptions,
+        error: payload.error,
+        buildTrackingEvent: () => buildRpcServiceDegradedAnalyticsTrackingEvent(payload, analyticsOptions.isRpcEndpointUrlPublic),
+    });
+}
+exports.trackRpcServiceDegraded = trackRpcServiceDegraded;
+//# sourceMappingURL=rpc-service-analytics.cjs.map

dist/rpc-service-analytics.cjs.map

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Defaults to `() => false`.\n   */\n  isRpcEndpointUrlPublic?: (endpointUrl: string) => boolean;\n  /**\n   * The proportion of events to emit, between 0 and 1. `1` emits every event,\n   * `0` emits none. Clients typically use a small value (e.g. `0.01`) in\n   * production to stay within their analytics quota, and `1` in development.\n   * Defaults to `0`.\n   */\n  rpcServiceEventsSampleRate?: number;\n};\n\n/**\n * {@link NetworkControllerAnalyticsOptions} with defaults applied, as used\n * internally once the controller has filled in any omitted properties.\n */\nexport type ResolvedNetworkControllerAnalyticsOptions =\n  Required<NetworkControllerAnalyticsOptions>;\n\n/**\n * Hides any API key contained in an RPC endpoint URL by reducing it to its\n * host, but only when the endpoint is considered public. Non-public endpoints\n * (and URLs that cannot be parsed) are reported as the literal string\n * `'custom'`.\n *\n * @param endpointUrl - The URL of the RPC endpoint.\n * @param isPublic - Whether the endpoint is safe to report verbatim.\n * @returns The sanitized value to report.\n */\nexport function sanitizeRpcEndpointUrl(\n  endpointUrl: string,\n  isPublic: boolean,\n): string {\n  if (!isPublic) {\n    return 'custom';\n  }\n\n  try {\n    return new URL(endpointUrl).host;\n  } catch {\n    return 'custom';\n  }\n}\n\n/**\n * Wraps a name and properties into the shape expected by the\n * `AnalyticsController:trackEvent` action.\n *\n * @param name - The analytics event name.\n * @param properties - The analytics event properties.\n * @returns The analytics tracking event.\n */\nfunction toAnalyticsTrackingEvent(\n  name: RpcServiceEventName,\n  properties: Record<string, Json>,\n): AnalyticsTrackingEvent {\n  return {\n    name,\n    properties,\n    sensitiveProperties: {},\n    saveDataRecording: false,\n    hasProperties: Object.keys(properties).length > 0,\n  };\n}\n\n/**\n * Builds the properties common to both RPC service events.\n *\n * @param args - The arguments.\n * @param args.chainId - The chain ID that the endpoint represents.\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.error - The connection or response error encountered.\n * @param args.isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe\n * to report verbatim.\n * @returns The common analytics event properties.\n */\nfunction buildCommonRpcServiceEventProperties({\n  chainId,\n  endpointUrl,\n  error,\n  isRpcEndpointUrlPublic,\n}: {\n  chainId: Hex;\n  endpointUrl: string;\n  error: unknown;\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean;\n}): Record<string, Json> {\n  const sanitizedUrl = sanitizeRpcEndpointUrl(\n    endpointUrl,\n    isRpcEndpointUrlPublic(endpointUrl),\n  );\n\n  // The names of analytics properties have a particular case.\n  return {\n    chain_id_caip: `eip155:${hexToNumber(chainId)}`,\n    rpc_domain: sanitizedUrl,\n    rpc_endpoint_url: sanitizedUrl, // @deprecated - Will be removed in a future release.\n    ...(isObject(error) &&\n    hasProperty(error, 'httpStatus') &&\n    isValidJson(error.httpStatus)\n      ? { http_status: error.httpStatus }\n      : {}),\n  };\n}\n\n/**\n * Builds the \"RPC Service Unavailable\" analytics tracking event.\n *\n * @param payload - The `rpcEndpointUnavailable` event payload.\n * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to\n * report verbatim.\n * @returns The analytics tracking event.\n */\nexport function buildRpcServiceUnavailableAnalyticsTrackingEvent(\n  payload: RpcEndpointUnavailablePayload,\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean,\n): AnalyticsTrackingEvent {\n  return toAnalyticsTrackingEvent(\n    'RPC Service Unavailable',\n    buildCommonRpcServiceEventProperties({\n      chainId: payload.chainId,\n      endpointUrl: payload.endpointUrl,\n      error: payload.error,\n      isRpcEndpointUrlPublic,\n    }),\n  );\n}\n\n/**\n * Builds the \"RPC Service Degraded\" analytics tracking event.\n *\n * @param payload - The `rpcEndpointDegraded` event payload.\n * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to\n * report verbatim.\n * @returns The analytics tracking event.\n */\nexport function buildRpcServiceDegradedAnalyticsTrackingEvent(\n  payload: RpcEndpointDegradedPayload,\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean,\n): AnalyticsTrackingEvent {\n  const { duration, retryReason, rpcMethodName, traceId, type } = payload;\n\n  // The names of analytics properties have a particular case.\n  return toAnalyticsTrackingEvent('RPC Service Degraded', {\n    ...buildCommonRpcServiceEventProperties({\n      chainId: payload.chainId,\n      endpointUrl: payload.endpointUrl,\n      error: payload.error,\n      isRpcEndpointUrlPublic,\n    }),\n    rpc_method_name: rpcMethodName,\n    type,\n    ...(retryReason ? { retry_reason: retryReason } : {}),\n    ...(duration === undefined ? {} : { duration_ms: duration }),\n    ...(traceId === undefined ? {} : { trace_id: traceId }),\n  });\n}\n\n/**\n * Delivers an RPC service analytics event via the\n * `AnalyticsController:trackEvent` action, skipping local connection errors,\n * users without an analytics ID, and events that fall outside the configured\n * sample. Failures never propagate to the caller.\n *\n * @param args - The arguments.\n * @param args.messenger - The controller messenger.\n * @param args.analyticsOptions - The analytics configuration.\n * @param args.error - The error encountered, used to skip local connection errors.\n * @param args.buildTrackingEvent - Builds the event to deliver. Called lazily\n * inside the `try` so that a throw from the client's `isRpcEndpointUrlPublic` is\n * captured rather than propagated, and so the event is not built when it will\n * not be sent.\n */\nfunction trackRpcServiceEvent({\n  messenger,\n  analyticsOptions,\n  error,\n  buildTrackingEvent,\n}: {\n  messenger: NetworkControllerMessenger;\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions;\n  error: unknown;\n  buildTrackingEvent: () => AnalyticsTrackingEvent;\n}): void {\n  try {\n    if (isConnectionError(error)) {\n      return;\n    }\n\n    const { analyticsId } = messenger.call('AnalyticsController:getState');\n    if (!analyticsId) {\n      return;\n    }\n\n    if (\n      generateDeterministicRandomNumber(analyticsId) >=\n      analyticsOptions.rpcServiceEventsSampleRate\n    ) {\n      return;\n    }\n\n    messenger.call('AnalyticsController:trackEvent', buildTrackingEvent());\n  } catch (caughtError) {\n    messenger.captureException?.(\n      wrapError(caughtError, 'Could not create analytics event'),\n    );\n  }\n}\n\n/**\n * Emits an \"RPC Service Unavailable\" analytics event.\n *\n * @param messenger - The controller messenger.\n * @param analyticsOptions - The analytics configuration.\n * @param payload - The `rpcEndpointUnavailable` event payload.\n */\nexport function trackRpcServiceUnavailable(\n  messenger: NetworkControllerMessenger,\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions,\n  payload: RpcEndpointUnavailablePayload,\n): void {\n  trackRpcServiceEvent({\n    messenger,\n    analyticsOptions,\n    error: payload.error,\n    buildTrackingEvent: () =>\n      buildRpcServiceUnavailableAnalyticsTrackingEvent(\n        payload,\n        analyticsOptions.isRpcEndpointUrlPublic,\n      ),\n  });\n}\n\n/**\n * Emits an \"RPC Service Degraded\" analytics event.\n *\n * @param messenger - The controller messenger.\n * @param analyticsOptions - The analytics configuration.\n * @param payload - The `rpcEndpointDegraded` event payload.\n */\nexport function trackRpcServiceDegraded(\n  messenger: NetworkControllerMessenger,\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions,\n  payload: RpcEndpointDegradedPayload,\n): void {\n  trackRpcServiceEvent({\n    messenger,\n    analyticsOptions,\n    error: payload.error,\n    buildTrackingEvent: () =>\n      buildRpcServiceDegradedAnalyticsTrackingEvent(\n        payload,\n        analyticsOptions.isRpcEndpointUrlPublic,\n      ),\n  });\n}\n"]}

dist/rpc-service-analytics.d.cts

+import type { AnalyticsTrackingEvent } from "@metamask/analytics-controller";
+import type { NetworkControllerMessenger, NetworkControllerRpcEndpointDegradedEvent, NetworkControllerRpcEndpointUnavailableEvent } from "./NetworkController.cjs";
+type RpcEndpointUnavailablePayload = NetworkControllerRpcEndpointUnavailableEvent['payload'][0];
+type RpcEndpointDegradedPayload = NetworkControllerRpcEndpointDegradedEvent['payload'][0];
+/**
+ * The names of the analytics events that {@link NetworkController} emits when an
+ * RPC endpoint becomes unavailable or degraded.
+ */
+export type RpcServiceEventName = 'RPC Service Unavailable' | 'RPC Service Degraded';
+/**
+ * Configuration that enables {@link NetworkController} to emit analytics events
+ * for unavailable or degraded RPC endpoints.
+ *
+ * The pieces here are client-specific and cannot be derived inside the
+ * controller: deciding whether an endpoint URL is safe to report depends on the
+ * client's lists of known networks, and the sample rate depends on the client's
+ * build environment.
+ */
+export type NetworkControllerAnalyticsOptions = {
+    /**
+     * Returns `true` if the given RPC endpoint URL is safe to report verbatim (a
+     * "public" endpoint), or `false` if it must be reported as the literal string
+     * `'custom'` to avoid leaking private servers. Defaults to `() => false`.
+     */
+    isRpcEndpointUrlPublic?: (endpointUrl: string) => boolean;
+    /**
+     * The proportion of events to emit, between 0 and 1. `1` emits every event,
+     * `0` emits none. Clients typically use a small value (e.g. `0.01`) in
+     * production to stay within their analytics quota, and `1` in development.
+     * Defaults to `0`.
+     */
+    rpcServiceEventsSampleRate?: number;
+};
+/**
+ * {@link NetworkControllerAnalyticsOptions} with defaults applied, as used
+ * internally once the controller has filled in any omitted properties.
+ */
+export type ResolvedNetworkControllerAnalyticsOptions = Required<NetworkControllerAnalyticsOptions>;
+/**
+ * Hides any API key contained in an RPC endpoint URL by reducing it to its
+ * host, but only when the endpoint is considered public. Non-public endpoints
+ * (and URLs that cannot be parsed) are reported as the literal string
+ * `'custom'`.
+ *
+ * @param endpointUrl - The URL of the RPC endpoint.
+ * @param isPublic - Whether the endpoint is safe to report verbatim.
+ * @returns The sanitized value to report.
+ */
+export declare function sanitizeRpcEndpointUrl(endpointUrl: string, isPublic: boolean): string;
+/**
+ * Builds the "RPC Service Unavailable" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export declare function buildRpcServiceUnavailableAnalyticsTrackingEvent(payload: RpcEndpointUnavailablePayload, isRpcEndpointUrlPublic: (endpointUrl: string) => boolean): AnalyticsTrackingEvent;
+/**
+ * Builds the "RPC Service Degraded" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export declare function buildRpcServiceDegradedAnalyticsTrackingEvent(payload: RpcEndpointDegradedPayload, isRpcEndpointUrlPublic: (endpointUrl: string) => boolean): AnalyticsTrackingEvent;
+/**
+ * Emits an "RPC Service Unavailable" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ */
+export declare function trackRpcServiceUnavailable(messenger: NetworkControllerMessenger, analyticsOptions: ResolvedNetworkControllerAnalyticsOptions, payload: RpcEndpointUnavailablePayload): void;
+/**
+ * Emits an "RPC Service Degraded" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ */
+export declare function trackRpcServiceDegraded(messenger: NetworkControllerMessenger, analyticsOptions: ResolvedNetworkControllerAnalyticsOptions, payload: RpcEndpointDegradedPayload): void;
+export {};
+//# sourceMappingURL=rpc-service-analytics.d.cts.map

dist/rpc-service-analytics.d.cts.map

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dist/rpc-service-analytics.d.mts

+import type { AnalyticsTrackingEvent } from "@metamask/analytics-controller";
+import type { NetworkControllerMessenger, NetworkControllerRpcEndpointDegradedEvent, NetworkControllerRpcEndpointUnavailableEvent } from "./NetworkController.mjs";
+type RpcEndpointUnavailablePayload = NetworkControllerRpcEndpointUnavailableEvent['payload'][0];
+type RpcEndpointDegradedPayload = NetworkControllerRpcEndpointDegradedEvent['payload'][0];
+/**
+ * The names of the analytics events that {@link NetworkController} emits when an
+ * RPC endpoint becomes unavailable or degraded.
+ */
+export type RpcServiceEventName = 'RPC Service Unavailable' | 'RPC Service Degraded';
+/**
+ * Configuration that enables {@link NetworkController} to emit analytics events
+ * for unavailable or degraded RPC endpoints.
+ *
+ * The pieces here are client-specific and cannot be derived inside the
+ * controller: deciding whether an endpoint URL is safe to report depends on the
+ * client's lists of known networks, and the sample rate depends on the client's
+ * build environment.
+ */
+export type NetworkControllerAnalyticsOptions = {
+    /**
+     * Returns `true` if the given RPC endpoint URL is safe to report verbatim (a
+     * "public" endpoint), or `false` if it must be reported as the literal string
+     * `'custom'` to avoid leaking private servers. Defaults to `() => false`.
+     */
+    isRpcEndpointUrlPublic?: (endpointUrl: string) => boolean;
+    /**
+     * The proportion of events to emit, between 0 and 1. `1` emits every event,
+     * `0` emits none. Clients typically use a small value (e.g. `0.01`) in
+     * production to stay within their analytics quota, and `1` in development.
+     * Defaults to `0`.
+     */
+    rpcServiceEventsSampleRate?: number;
+};
+/**
+ * {@link NetworkControllerAnalyticsOptions} with defaults applied, as used
+ * internally once the controller has filled in any omitted properties.
+ */
+export type ResolvedNetworkControllerAnalyticsOptions = Required<NetworkControllerAnalyticsOptions>;
+/**
+ * Hides any API key contained in an RPC endpoint URL by reducing it to its
+ * host, but only when the endpoint is considered public. Non-public endpoints
+ * (and URLs that cannot be parsed) are reported as the literal string
+ * `'custom'`.
+ *
+ * @param endpointUrl - The URL of the RPC endpoint.
+ * @param isPublic - Whether the endpoint is safe to report verbatim.
+ * @returns The sanitized value to report.
+ */
+export declare function sanitizeRpcEndpointUrl(endpointUrl: string, isPublic: boolean): string;
+/**
+ * Builds the "RPC Service Unavailable" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export declare function buildRpcServiceUnavailableAnalyticsTrackingEvent(payload: RpcEndpointUnavailablePayload, isRpcEndpointUrlPublic: (endpointUrl: string) => boolean): AnalyticsTrackingEvent;
+/**
+ * Builds the "RPC Service Degraded" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export declare function buildRpcServiceDegradedAnalyticsTrackingEvent(payload: RpcEndpointDegradedPayload, isRpcEndpointUrlPublic: (endpointUrl: string) => boolean): AnalyticsTrackingEvent;
+/**
+ * Emits an "RPC Service Unavailable" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ */
+export declare function trackRpcServiceUnavailable(messenger: NetworkControllerMessenger, analyticsOptions: ResolvedNetworkControllerAnalyticsOptions, payload: RpcEndpointUnavailablePayload): void;
+/**
+ * Emits an "RPC Service Degraded" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ */
+export declare function trackRpcServiceDegraded(messenger: NetworkControllerMessenger, analyticsOptions: ResolvedNetworkControllerAnalyticsOptions, payload: RpcEndpointDegradedPayload): void;
+export {};
+//# sourceMappingURL=rpc-service-analytics.d.mts.map

dist/rpc-service-analytics.d.mts.map

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dist/rpc-service-analytics.mjs

+import { generateDeterministicRandomNumber } from "@metamask/remote-feature-flag-controller";
+import { hasProperty, hexToNumber, isObject, isValidJson, wrapError } from "@metamask/utils";
+import { isConnectionError } from "./rpc-service/rpc-service.mjs";
+/**
+ * Hides any API key contained in an RPC endpoint URL by reducing it to its
+ * host, but only when the endpoint is considered public. Non-public endpoints
+ * (and URLs that cannot be parsed) are reported as the literal string
+ * `'custom'`.
+ *
+ * @param endpointUrl - The URL of the RPC endpoint.
+ * @param isPublic - Whether the endpoint is safe to report verbatim.
+ * @returns The sanitized value to report.
+ */
+export function sanitizeRpcEndpointUrl(endpointUrl, isPublic) {
+    if (!isPublic) {
+        return 'custom';
+    }
+    try {
+        return new URL(endpointUrl).host;
+    }
+    catch {
+        return 'custom';
+    }
+}
+/**
+ * Wraps a name and properties into the shape expected by the
+ * `AnalyticsController:trackEvent` action.
+ *
+ * @param name - The analytics event name.
+ * @param properties - The analytics event properties.
+ * @returns The analytics tracking event.
+ */
+function toAnalyticsTrackingEvent(name, properties) {
+    return {
+        name,
+        properties,
+        sensitiveProperties: {},
+        saveDataRecording: false,
+        hasProperties: Object.keys(properties).length > 0,
+    };
+}
+/**
+ * Builds the properties common to both RPC service events.
+ *
+ * @param args - The arguments.
+ * @param args.chainId - The chain ID that the endpoint represents.
+ * @param args.endpointUrl - The URL of the endpoint.
+ * @param args.error - The connection or response error encountered.
+ * @param args.isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe
+ * to report verbatim.
+ * @returns The common analytics event properties.
+ */
+function buildCommonRpcServiceEventProperties({ chainId, endpointUrl, error, isRpcEndpointUrlPublic, }) {
+    const sanitizedUrl = sanitizeRpcEndpointUrl(endpointUrl, isRpcEndpointUrlPublic(endpointUrl));
+    // The names of analytics properties have a particular case.
+    return {
+        chain_id_caip: `eip155:${hexToNumber(chainId)}`,
+        rpc_domain: sanitizedUrl,
+        rpc_endpoint_url: sanitizedUrl, // @deprecated - Will be removed in a future release.
+        ...(isObject(error) &&
+            hasProperty(error, 'httpStatus') &&
+            isValidJson(error.httpStatus)
+            ? { http_status: error.httpStatus }
+            : {}),
+    };
+}
+/**
+ * Builds the "RPC Service Unavailable" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export function buildRpcServiceUnavailableAnalyticsTrackingEvent(payload, isRpcEndpointUrlPublic) {
+    return toAnalyticsTrackingEvent('RPC Service Unavailable', buildCommonRpcServiceEventProperties({
+        chainId: payload.chainId,
+        endpointUrl: payload.endpointUrl,
+        error: payload.error,
+        isRpcEndpointUrlPublic,
+    }));
+}
+/**
+ * Builds the "RPC Service Degraded" analytics tracking event.
+ *
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to
+ * report verbatim.
+ * @returns The analytics tracking event.
+ */
+export function buildRpcServiceDegradedAnalyticsTrackingEvent(payload, isRpcEndpointUrlPublic) {
+    const { duration, retryReason, rpcMethodName, traceId, type } = payload;
+    // The names of analytics properties have a particular case.
+    return toAnalyticsTrackingEvent('RPC Service Degraded', {
+        ...buildCommonRpcServiceEventProperties({
+            chainId: payload.chainId,
+            endpointUrl: payload.endpointUrl,
+            error: payload.error,
+            isRpcEndpointUrlPublic,
+        }),
+        rpc_method_name: rpcMethodName,
+        type,
+        ...(retryReason ? { retry_reason: retryReason } : {}),
+        ...(duration === undefined ? {} : { duration_ms: duration }),
+        ...(traceId === undefined ? {} : { trace_id: traceId }),
+    });
+}
+/**
+ * Delivers an RPC service analytics event via the
+ * `AnalyticsController:trackEvent` action, skipping local connection errors,
+ * users without an analytics ID, and events that fall outside the configured
+ * sample. Failures never propagate to the caller.
+ *
+ * @param args - The arguments.
+ * @param args.messenger - The controller messenger.
+ * @param args.analyticsOptions - The analytics configuration.
+ * @param args.error - The error encountered, used to skip local connection errors.
+ * @param args.buildTrackingEvent - Builds the event to deliver. Called lazily
+ * inside the `try` so that a throw from the client's `isRpcEndpointUrlPublic` is
+ * captured rather than propagated, and so the event is not built when it will
+ * not be sent.
+ */
+function trackRpcServiceEvent({ messenger, analyticsOptions, error, buildTrackingEvent, }) {
+    try {
+        if (isConnectionError(error)) {
+            return;
+        }
+        const { analyticsId } = messenger.call('AnalyticsController:getState');
+        if (!analyticsId) {
+            return;
+        }
+        if (generateDeterministicRandomNumber(analyticsId) >=
+            analyticsOptions.rpcServiceEventsSampleRate) {
+            return;
+        }
+        messenger.call('AnalyticsController:trackEvent', buildTrackingEvent());
+    }
+    catch (caughtError) {
+        messenger.captureException?.(wrapError(caughtError, 'Could not create analytics event'));
+    }
+}
+/**
+ * Emits an "RPC Service Unavailable" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointUnavailable` event payload.
+ */
+export function trackRpcServiceUnavailable(messenger, analyticsOptions, payload) {
+    trackRpcServiceEvent({
+        messenger,
+        analyticsOptions,
+        error: payload.error,
+        buildTrackingEvent: () => buildRpcServiceUnavailableAnalyticsTrackingEvent(payload, analyticsOptions.isRpcEndpointUrlPublic),
+    });
+}
+/**
+ * Emits an "RPC Service Degraded" analytics event.
+ *
+ * @param messenger - The controller messenger.
+ * @param analyticsOptions - The analytics configuration.
+ * @param payload - The `rpcEndpointDegraded` event payload.
+ */
+export function trackRpcServiceDegraded(messenger, analyticsOptions, payload) {
+    trackRpcServiceEvent({
+        messenger,
+        analyticsOptions,
+        error: payload.error,
+        buildTrackingEvent: () => buildRpcServiceDegradedAnalyticsTrackingEvent(payload, analyticsOptions.isRpcEndpointUrlPublic),
+    });
+}
+//# sourceMappingURL=rpc-service-analytics.mjs.map

dist/rpc-service-analytics.mjs.map

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Defaults to `() => false`.\n   */\n  isRpcEndpointUrlPublic?: (endpointUrl: string) => boolean;\n  /**\n   * The proportion of events to emit, between 0 and 1. `1` emits every event,\n   * `0` emits none. Clients typically use a small value (e.g. `0.01`) in\n   * production to stay within their analytics quota, and `1` in development.\n   * Defaults to `0`.\n   */\n  rpcServiceEventsSampleRate?: number;\n};\n\n/**\n * {@link NetworkControllerAnalyticsOptions} with defaults applied, as used\n * internally once the controller has filled in any omitted properties.\n */\nexport type ResolvedNetworkControllerAnalyticsOptions =\n  Required<NetworkControllerAnalyticsOptions>;\n\n/**\n * Hides any API key contained in an RPC endpoint URL by reducing it to its\n * host, but only when the endpoint is considered public. Non-public endpoints\n * (and URLs that cannot be parsed) are reported as the literal string\n * `'custom'`.\n *\n * @param endpointUrl - The URL of the RPC endpoint.\n * @param isPublic - Whether the endpoint is safe to report verbatim.\n * @returns The sanitized value to report.\n */\nexport function sanitizeRpcEndpointUrl(\n  endpointUrl: string,\n  isPublic: boolean,\n): string {\n  if (!isPublic) {\n    return 'custom';\n  }\n\n  try {\n    return new URL(endpointUrl).host;\n  } catch {\n    return 'custom';\n  }\n}\n\n/**\n * Wraps a name and properties into the shape expected by the\n * `AnalyticsController:trackEvent` action.\n *\n * @param name - The analytics event name.\n * @param properties - The analytics event properties.\n * @returns The analytics tracking event.\n */\nfunction toAnalyticsTrackingEvent(\n  name: RpcServiceEventName,\n  properties: Record<string, Json>,\n): AnalyticsTrackingEvent {\n  return {\n    name,\n    properties,\n    sensitiveProperties: {},\n    saveDataRecording: false,\n    hasProperties: Object.keys(properties).length > 0,\n  };\n}\n\n/**\n * Builds the properties common to both RPC service events.\n *\n * @param args - The arguments.\n * @param args.chainId - The chain ID that the endpoint represents.\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.error - The connection or response error encountered.\n * @param args.isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe\n * to report verbatim.\n * @returns The common analytics event properties.\n */\nfunction buildCommonRpcServiceEventProperties({\n  chainId,\n  endpointUrl,\n  error,\n  isRpcEndpointUrlPublic,\n}: {\n  chainId: Hex;\n  endpointUrl: string;\n  error: unknown;\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean;\n}): Record<string, Json> {\n  const sanitizedUrl = sanitizeRpcEndpointUrl(\n    endpointUrl,\n    isRpcEndpointUrlPublic(endpointUrl),\n  );\n\n  // The names of analytics properties have a particular case.\n  return {\n    chain_id_caip: `eip155:${hexToNumber(chainId)}`,\n    rpc_domain: sanitizedUrl,\n    rpc_endpoint_url: sanitizedUrl, // @deprecated - Will be removed in a future release.\n    ...(isObject(error) &&\n    hasProperty(error, 'httpStatus') &&\n    isValidJson(error.httpStatus)\n      ? { http_status: error.httpStatus }\n      : {}),\n  };\n}\n\n/**\n * Builds the \"RPC Service Unavailable\" analytics tracking event.\n *\n * @param payload - The `rpcEndpointUnavailable` event payload.\n * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to\n * report verbatim.\n * @returns The analytics tracking event.\n */\nexport function buildRpcServiceUnavailableAnalyticsTrackingEvent(\n  payload: RpcEndpointUnavailablePayload,\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean,\n): AnalyticsTrackingEvent {\n  return toAnalyticsTrackingEvent(\n    'RPC Service Unavailable',\n    buildCommonRpcServiceEventProperties({\n      chainId: payload.chainId,\n      endpointUrl: payload.endpointUrl,\n      error: payload.error,\n      isRpcEndpointUrlPublic,\n    }),\n  );\n}\n\n/**\n * Builds the \"RPC Service Degraded\" analytics tracking event.\n *\n * @param payload - The `rpcEndpointDegraded` event payload.\n * @param isRpcEndpointUrlPublic - Returns whether the endpoint URL is safe to\n * report verbatim.\n * @returns The analytics tracking event.\n */\nexport function buildRpcServiceDegradedAnalyticsTrackingEvent(\n  payload: RpcEndpointDegradedPayload,\n  isRpcEndpointUrlPublic: (endpointUrl: string) => boolean,\n): AnalyticsTrackingEvent {\n  const { duration, retryReason, rpcMethodName, traceId, type } = payload;\n\n  // The names of analytics properties have a particular case.\n  return toAnalyticsTrackingEvent('RPC Service Degraded', {\n    ...buildCommonRpcServiceEventProperties({\n      chainId: payload.chainId,\n      endpointUrl: payload.endpointUrl,\n      error: payload.error,\n      isRpcEndpointUrlPublic,\n    }),\n    rpc_method_name: rpcMethodName,\n    type,\n    ...(retryReason ? { retry_reason: retryReason } : {}),\n    ...(duration === undefined ? {} : { duration_ms: duration }),\n    ...(traceId === undefined ? {} : { trace_id: traceId }),\n  });\n}\n\n/**\n * Delivers an RPC service analytics event via the\n * `AnalyticsController:trackEvent` action, skipping local connection errors,\n * users without an analytics ID, and events that fall outside the configured\n * sample. Failures never propagate to the caller.\n *\n * @param args - The arguments.\n * @param args.messenger - The controller messenger.\n * @param args.analyticsOptions - The analytics configuration.\n * @param args.error - The error encountered, used to skip local connection errors.\n * @param args.buildTrackingEvent - Builds the event to deliver. Called lazily\n * inside the `try` so that a throw from the client's `isRpcEndpointUrlPublic` is\n * captured rather than propagated, and so the event is not built when it will\n * not be sent.\n */\nfunction trackRpcServiceEvent({\n  messenger,\n  analyticsOptions,\n  error,\n  buildTrackingEvent,\n}: {\n  messenger: NetworkControllerMessenger;\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions;\n  error: unknown;\n  buildTrackingEvent: () => AnalyticsTrackingEvent;\n}): void {\n  try {\n    if (isConnectionError(error)) {\n      return;\n    }\n\n    const { analyticsId } = messenger.call('AnalyticsController:getState');\n    if (!analyticsId) {\n      return;\n    }\n\n    if (\n      generateDeterministicRandomNumber(analyticsId) >=\n      analyticsOptions.rpcServiceEventsSampleRate\n    ) {\n      return;\n    }\n\n    messenger.call('AnalyticsController:trackEvent', buildTrackingEvent());\n  } catch (caughtError) {\n    messenger.captureException?.(\n      wrapError(caughtError, 'Could not create analytics event'),\n    );\n  }\n}\n\n/**\n * Emits an \"RPC Service Unavailable\" analytics event.\n *\n * @param messenger - The controller messenger.\n * @param analyticsOptions - The analytics configuration.\n * @param payload - The `rpcEndpointUnavailable` event payload.\n */\nexport function trackRpcServiceUnavailable(\n  messenger: NetworkControllerMessenger,\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions,\n  payload: RpcEndpointUnavailablePayload,\n): void {\n  trackRpcServiceEvent({\n    messenger,\n    analyticsOptions,\n    error: payload.error,\n    buildTrackingEvent: () =>\n      buildRpcServiceUnavailableAnalyticsTrackingEvent(\n        payload,\n        analyticsOptions.isRpcEndpointUrlPublic,\n      ),\n  });\n}\n\n/**\n * Emits an \"RPC Service Degraded\" analytics event.\n *\n * @param messenger - The controller messenger.\n * @param analyticsOptions - The analytics configuration.\n * @param payload - The `rpcEndpointDegraded` event payload.\n */\nexport function trackRpcServiceDegraded(\n  messenger: NetworkControllerMessenger,\n  analyticsOptions: ResolvedNetworkControllerAnalyticsOptions,\n  payload: RpcEndpointDegradedPayload,\n): void {\n  trackRpcServiceEvent({\n    messenger,\n    analyticsOptions,\n    error: payload.error,\n    buildTrackingEvent: () =>\n      buildRpcServiceDegradedAnalyticsTrackingEvent(\n        payload,\n        analyticsOptions.isRpcEndpointUrlPublic,\n      ),\n  });\n}\n"]}

dist/create-auto-managed-network-client.cjs

 "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
 exports.createAutoManagedNetworkClient = void 0;
-const create_network_client_1 = require("./create-network-client.cjs");
+const create_network_client_js_1 = require("./create-network-client.cjs");
 /**
@@ -48,3 +48,3 @@ * The name of the method on both the provider and block tracker proxy which can
     const ensureNetworkClientCreated = () => {
-        networkClient ?? (networkClient = (0, create_network_client_1.createNetworkClient)({
+        networkClient ?? (networkClient = (0, create_network_client_js_1.createNetworkClient)({
             id: networkClientId,
@@ -51,0 +51,0 @@ configuration: networkClientConfiguration,

dist/create-auto-managed-network-client.cjs.map

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As a proxy, it allows\n * for accessing and setting all of the properties that the target object\n * supports, but also supports an extra propertyName (`__target__`) to access\n * the target itself.\n *\n * @template Type - The type of the target object. It is assumed that this type\n * will be constant even when the target is swapped.\n */\nexport type ProxyWithAccessibleTarget<TargetType> = TargetType & {\n  [REFLECTIVE_PROPERTY_NAME]: TargetType;\n};\n\n/**\n * An object that provides the same interface as a network client but where the\n * network client is not initialized until either the provider or block tracker\n * is first accessed.\n */\nexport type AutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n> = {\n  configuration: Configuration;\n  provider: ProxyWithAccessibleTarget<Provider>;\n  blockTracker: ProxyWithAccessibleTarget<BlockTracker>;\n  destroy: () => void;\n  setRpcFailoverMode: (rpcFailoverMode: RpcFailoverMode) => void;\n};\n\n/**\n * By default, the provider and block provider proxies will point to nothing.\n * This is impossible when using the Proxy API, as the target object has to be\n * something, so this object represents that \"something\".\n */\nconst UNINITIALIZED_TARGET = { __UNINITIALIZED__: true };\n\n/**\n * This function creates two proxies, one that wraps a provider and another that\n * wraps a block tracker. These proxies are unique in that both will be \"empty\"\n * at first; that is, neither will point to a functional provider or block\n * tracker. Instead, as soon as a method or event is accessed on either object\n * that requires a network request to function, a network client is created on\n * the fly and the method or event in question is then forwarded to whichever\n * part of the network client is serving as the receiver. The network client is\n * then cached for subsequent usages.\n *\n * @param args - The arguments.\n * @param args.networkClientId - The ID that will be assigned to the new network\n * client in the registry.\n * @param args.networkClientConfiguration - The configuration object that will be\n * used to instantiate the network client when it is needed.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @param args.logger - A `loglevel` logger.\n * @returns The auto-managed network client.\n */\nexport function createAutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n>({\n  networkClientId,\n  networkClientConfiguration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions = (): Omit<\n    PollingBlockTrackerOptions,\n    'provider'\n  > => ({}),\n  messenger,\n  rpcFailoverMode: givenRpcFailoverMode,\n  logger,\n}: {\n  networkClientId: NetworkClientId;\n  networkClientConfiguration: Configuration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions?: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): AutoManagedNetworkClient<Configuration> {\n  let rpcFailoverMode = givenRpcFailoverMode;\n  let networkClient: NetworkClient | undefined;\n\n  const ensureNetworkClientCreated = (): NetworkClient => {\n    networkClient ??= createNetworkClient({\n      id: networkClientId,\n      configuration: networkClientConfiguration,\n      getRpcServiceOptions,\n      getBlockTrackerOptions,\n      messenger,\n      rpcFailoverMode,\n      logger,\n    });\n\n    if (networkClient === undefined) {\n      throw new Error(\n        \"It looks like `createNetworkClient` didn't return anything. Perhaps it's being mocked?\",\n      );\n    }\n\n    return networkClient;\n  };\n\n  const providerProxy = new Proxy(UNINITIALIZED_TARGET, {\n    get(\n      _target: unknown,\n      propertyName: PropertyKey,\n      receiver: unknown,\n    ):\n      | Provider\n      | ((this: unknown, ...args: unknown[]) => Promise<Json> | undefined)\n      | undefined {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return networkClient?.provider;\n      }\n\n      const { provider } = ensureNetworkClientCreated();\n\n      if (propertyName in provider) {\n        // Typecast: We know that `[propertyName]` is a propertyName on\n        // `provider`.\n        const value = provider[propertyName as keyof typeof provider];\n        if (typeof value === 'function') {\n          // Ensure that the method on the provider is called with `this` as\n          // the target, *not* the proxy (which happens by default) —\n          // this allows private properties to be accessed\n          return function (this: unknown, ...args: unknown[]): Promise<Json> {\n            // @ts-expect-error We don't care that `this` may not be compatible\n            // with the signature of the method being called, as technically\n            // it can be anything.\n            return value.apply(this === receiver ? provider : this, args);\n          };\n        }\n        return value;\n      }\n\n      return undefined;\n    },\n\n    // TODO: Replace `any` with type\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    has(_target: any, propertyName: PropertyKey): boolean {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return true;\n      }\n      const { provider } = ensureNetworkClientCreated();\n      return propertyName in provider;\n    },\n  });\n\n  const blockTrackerProxy: ProxyWithAccessibleTarget<BlockTracker> = new Proxy(\n    UNINITIALIZED_TARGET,\n    {\n      get(\n        _target: unknown,\n        propertyName: PropertyKey,\n        receiver: unknown,\n      ):\n        | BlockTracker\n        | ((this: unknown, ...args: unknown[]) => unknown)\n        | undefined {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return networkClient?.blockTracker;\n        }\n\n        const { blockTracker } = ensureNetworkClientCreated();\n\n        if (propertyName in blockTracker) {\n          // Typecast: We know that `[propertyName]` is a propertyName on\n          // `provider`.\n          const value = blockTracker[propertyName as keyof typeof blockTracker];\n          if (typeof value === 'function') {\n            // Ensure that the method on the provider is called with `this` as\n            // the target, *not* the proxy (which happens by default) —\n            // this allows private properties to be accessed\n            return function (this: unknown, ...args: unknown[]) {\n              // @ts-expect-error We don't care that `this` may not be\n              // compatible with the signature of the method being called, as\n              // technically it can be anything.\n              return value.apply(this === receiver ? blockTracker : this, args);\n            };\n          }\n          return value;\n        }\n\n        return undefined;\n      },\n\n      // TODO: Replace `any` with type\n      // eslint-disable-next-line @typescript-eslint/no-explicit-any\n      has(_target: any, propertyName: PropertyKey): boolean {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return true;\n        }\n        const { blockTracker } = ensureNetworkClientCreated();\n        return propertyName in blockTracker;\n      },\n    },\n  );\n\n  const destroy = (): void => {\n    networkClient?.destroy();\n  };\n\n  const setRpcFailoverMode = (newRpcFailoverMode: RpcFailoverMode): void => {\n    rpcFailoverMode = newRpcFailoverMode;\n    destroy();\n    networkClient = undefined;\n  };\n\n  return {\n    configuration: networkClientConfiguration,\n    provider: providerProxy,\n    blockTracker: blockTrackerProxy,\n    destroy,\n    setRpcFailoverMode,\n  };\n}\n"]}
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As a proxy, it allows\n * for accessing and setting all of the properties that the target object\n * supports, but also supports an extra propertyName (`__target__`) to access\n * the target itself.\n *\n * @template Type - The type of the target object. 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These proxies are unique in that both will be \"empty\"\n * at first; that is, neither will point to a functional provider or block\n * tracker. Instead, as soon as a method or event is accessed on either object\n * that requires a network request to function, a network client is created on\n * the fly and the method or event in question is then forwarded to whichever\n * part of the network client is serving as the receiver. The network client is\n * then cached for subsequent usages.\n *\n * @param args - The arguments.\n * @param args.networkClientId - The ID that will be assigned to the new network\n * client in the registry.\n * @param args.networkClientConfiguration - The configuration object that will be\n * used to instantiate the network client when it is needed.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @param args.logger - A `loglevel` logger.\n * @returns The auto-managed network client.\n */\nexport function createAutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n>({\n  networkClientId,\n  networkClientConfiguration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions = (): Omit<\n    PollingBlockTrackerOptions,\n    'provider'\n  > => ({}),\n  messenger,\n  rpcFailoverMode: givenRpcFailoverMode,\n  logger,\n}: {\n  networkClientId: NetworkClientId;\n  networkClientConfiguration: Configuration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions?: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): AutoManagedNetworkClient<Configuration> {\n  let rpcFailoverMode = givenRpcFailoverMode;\n  let networkClient: NetworkClient | undefined;\n\n  const ensureNetworkClientCreated = (): NetworkClient => {\n    networkClient ??= createNetworkClient({\n      id: networkClientId,\n      configuration: networkClientConfiguration,\n      getRpcServiceOptions,\n      getBlockTrackerOptions,\n      messenger,\n      rpcFailoverMode,\n      logger,\n    });\n\n    if (networkClient === undefined) {\n      throw new Error(\n        \"It looks like `createNetworkClient` didn't return anything. Perhaps it's being mocked?\",\n      );\n    }\n\n    return networkClient;\n  };\n\n  const providerProxy = new Proxy(UNINITIALIZED_TARGET, {\n    get(\n      _target: unknown,\n      propertyName: PropertyKey,\n      receiver: unknown,\n    ):\n      | Provider\n      | ((this: unknown, ...args: unknown[]) => Promise<Json> | undefined)\n      | undefined {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return networkClient?.provider;\n      }\n\n      const { provider } = ensureNetworkClientCreated();\n\n      if (propertyName in provider) {\n        // Typecast: We know that `[propertyName]` is a propertyName on\n        // `provider`.\n        const value = provider[propertyName as keyof typeof provider];\n        if (typeof value === 'function') {\n          // Ensure that the method on the provider is called with `this` as\n          // the target, *not* the proxy (which happens by default) —\n          // this allows private properties to be accessed\n          return function (this: unknown, ...args: unknown[]): Promise<Json> {\n            // @ts-expect-error We don't care that `this` may not be compatible\n            // with the signature of the method being called, as technically\n            // it can be anything.\n            return value.apply(this === receiver ? provider : this, args);\n          };\n        }\n        return value;\n      }\n\n      return undefined;\n    },\n\n    // TODO: Replace `any` with type\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    has(_target: any, propertyName: PropertyKey): boolean {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return true;\n      }\n      const { provider } = ensureNetworkClientCreated();\n      return propertyName in provider;\n    },\n  });\n\n  const blockTrackerProxy: ProxyWithAccessibleTarget<BlockTracker> = new Proxy(\n    UNINITIALIZED_TARGET,\n    {\n      get(\n        _target: unknown,\n        propertyName: PropertyKey,\n        receiver: unknown,\n      ):\n        | BlockTracker\n        | ((this: unknown, ...args: unknown[]) => unknown)\n        | undefined {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return networkClient?.blockTracker;\n        }\n\n        const { blockTracker } = ensureNetworkClientCreated();\n\n        if (propertyName in blockTracker) {\n          // Typecast: We know that `[propertyName]` is a propertyName on\n          // `provider`.\n          const value = blockTracker[propertyName as keyof typeof blockTracker];\n          if (typeof value === 'function') {\n            // Ensure that the method on the provider is called with `this` as\n            // the target, *not* the proxy (which happens by default) —\n            // this allows private properties to be accessed\n            return function (this: unknown, ...args: unknown[]) {\n              // @ts-expect-error We don't care that `this` may not be\n              // compatible with the signature of the method being called, as\n              // technically it can be anything.\n              return value.apply(this === receiver ? blockTracker : this, args);\n            };\n          }\n          return value;\n        }\n\n        return undefined;\n      },\n\n      // TODO: Replace `any` with type\n      // eslint-disable-next-line @typescript-eslint/no-explicit-any\n      has(_target: any, propertyName: PropertyKey): boolean {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return true;\n        }\n        const { blockTracker } = ensureNetworkClientCreated();\n        return propertyName in blockTracker;\n      },\n    },\n  );\n\n  const destroy = (): void => {\n    networkClient?.destroy();\n  };\n\n  const setRpcFailoverMode = (newRpcFailoverMode: RpcFailoverMode): void => {\n    rpcFailoverMode = newRpcFailoverMode;\n    destroy();\n    networkClient = undefined;\n  };\n\n  return {\n    configuration: networkClientConfiguration,\n    provider: providerProxy,\n    blockTracker: blockTrackerProxy,\n    destroy,\n    setRpcFailoverMode,\n  };\n}\n"]}

dist/create-auto-managed-network-client.d.cts.map

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As a proxy, it allows\n * for accessing and setting all of the properties that the target object\n * supports, but also supports an extra propertyName (`__target__`) to access\n * the target itself.\n *\n * @template Type - The type of the target object. It is assumed that this type\n * will be constant even when the target is swapped.\n */\nexport type ProxyWithAccessibleTarget<TargetType> = TargetType & {\n  [REFLECTIVE_PROPERTY_NAME]: TargetType;\n};\n\n/**\n * An object that provides the same interface as a network client but where the\n * network client is not initialized until either the provider or block tracker\n * is first accessed.\n */\nexport type AutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n> = {\n  configuration: Configuration;\n  provider: ProxyWithAccessibleTarget<Provider>;\n  blockTracker: ProxyWithAccessibleTarget<BlockTracker>;\n  destroy: () => void;\n  setRpcFailoverMode: (rpcFailoverMode: RpcFailoverMode) => void;\n};\n\n/**\n * By default, the provider and block provider proxies will point to nothing.\n * This is impossible when using the Proxy API, as the target object has to be\n * something, so this object represents that \"something\".\n */\nconst UNINITIALIZED_TARGET = { __UNINITIALIZED__: true };\n\n/**\n * This function creates two proxies, one that wraps a provider and another that\n * wraps a block tracker. These proxies are unique in that both will be \"empty\"\n * at first; that is, neither will point to a functional provider or block\n * tracker. Instead, as soon as a method or event is accessed on either object\n * that requires a network request to function, a network client is created on\n * the fly and the method or event in question is then forwarded to whichever\n * part of the network client is serving as the receiver. The network client is\n * then cached for subsequent usages.\n *\n * @param args - The arguments.\n * @param args.networkClientId - The ID that will be assigned to the new network\n * client in the registry.\n * @param args.networkClientConfiguration - The configuration object that will be\n * used to instantiate the network client when it is needed.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @param args.logger - A `loglevel` logger.\n * @returns The auto-managed network client.\n */\nexport function createAutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n>({\n  networkClientId,\n  networkClientConfiguration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions = (): Omit<\n    PollingBlockTrackerOptions,\n    'provider'\n  > => ({}),\n  messenger,\n  rpcFailoverMode: givenRpcFailoverMode,\n  logger,\n}: {\n  networkClientId: NetworkClientId;\n  networkClientConfiguration: Configuration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions?: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): AutoManagedNetworkClient<Configuration> {\n  let rpcFailoverMode = givenRpcFailoverMode;\n  let networkClient: NetworkClient | undefined;\n\n  const ensureNetworkClientCreated = (): NetworkClient => {\n    networkClient ??= createNetworkClient({\n      id: networkClientId,\n      configuration: networkClientConfiguration,\n      getRpcServiceOptions,\n      getBlockTrackerOptions,\n      messenger,\n      rpcFailoverMode,\n      logger,\n    });\n\n    if (networkClient === undefined) {\n      throw new Error(\n        \"It looks like `createNetworkClient` didn't return anything. Perhaps it's being mocked?\",\n      );\n    }\n\n    return networkClient;\n  };\n\n  const providerProxy = new Proxy(UNINITIALIZED_TARGET, {\n    get(\n      _target: unknown,\n      propertyName: PropertyKey,\n      receiver: unknown,\n    ):\n      | Provider\n      | ((this: unknown, ...args: unknown[]) => Promise<Json> | undefined)\n      | undefined {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return networkClient?.provider;\n      }\n\n      const { provider } = ensureNetworkClientCreated();\n\n      if (propertyName in provider) {\n        // Typecast: We know that `[propertyName]` is a propertyName on\n        // `provider`.\n        const value = provider[propertyName as keyof typeof provider];\n        if (typeof value === 'function') {\n          // Ensure that the method on the provider is called with `this` as\n          // the target, *not* the proxy (which happens by default) —\n          // this allows private properties to be accessed\n          return function (this: unknown, ...args: unknown[]): Promise<Json> {\n            // @ts-expect-error We don't care that `this` may not be compatible\n            // with the signature of the method being called, as technically\n            // it can be anything.\n            return value.apply(this === receiver ? provider : this, args);\n          };\n        }\n        return value;\n      }\n\n      return undefined;\n    },\n\n    // TODO: Replace `any` with type\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    has(_target: any, propertyName: PropertyKey): boolean {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return true;\n      }\n      const { provider } = ensureNetworkClientCreated();\n      return propertyName in provider;\n    },\n  });\n\n  const blockTrackerProxy: ProxyWithAccessibleTarget<BlockTracker> = new Proxy(\n    UNINITIALIZED_TARGET,\n    {\n      get(\n        _target: unknown,\n        propertyName: PropertyKey,\n        receiver: unknown,\n      ):\n        | BlockTracker\n        | ((this: unknown, ...args: unknown[]) => unknown)\n        | undefined {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return networkClient?.blockTracker;\n        }\n\n        const { blockTracker } = ensureNetworkClientCreated();\n\n        if (propertyName in blockTracker) {\n          // Typecast: We know that `[propertyName]` is a propertyName on\n          // `provider`.\n          const value = blockTracker[propertyName as keyof typeof blockTracker];\n          if (typeof value === 'function') {\n            // Ensure that the method on the provider is called with `this` as\n            // the target, *not* the proxy (which happens by default) —\n            // this allows private properties to be accessed\n            return function (this: unknown, ...args: unknown[]) {\n              // @ts-expect-error We don't care that `this` may not be\n              // compatible with the signature of the method being called, as\n              // technically it can be anything.\n              return value.apply(this === receiver ? blockTracker : this, args);\n            };\n          }\n          return value;\n        }\n\n        return undefined;\n      },\n\n      // TODO: Replace `any` with type\n      // eslint-disable-next-line @typescript-eslint/no-explicit-any\n      has(_target: any, propertyName: PropertyKey): boolean {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return true;\n        }\n        const { blockTracker } = ensureNetworkClientCreated();\n        return propertyName in blockTracker;\n      },\n    },\n  );\n\n  const destroy = (): void => {\n    networkClient?.destroy();\n  };\n\n  const setRpcFailoverMode = (newRpcFailoverMode: RpcFailoverMode): void => {\n    rpcFailoverMode = newRpcFailoverMode;\n    destroy();\n    networkClient = undefined;\n  };\n\n  return {\n    configuration: networkClientConfiguration,\n    provider: providerProxy,\n    blockTracker: blockTrackerProxy,\n    destroy,\n    setRpcFailoverMode,\n  };\n}\n"]}
+{"version":3,"file":"create-auto-managed-network-client.mjs","sourceRoot":"","sources":["../src/create-auto-managed-network-client.ts"],"names":[],"mappings":"AAKA,OAAO,EAAE,mBAAmB,EAAE,oCAAmC;AAajE;;;;GAIG;AACH,MAAM,wBAAwB,GAAG,YAAY,CAAC;AA8B9C;;;;GAIG;AACH,MAAM,oBAAoB,GAAG,EAAE,iBAAiB,EAAE,IAAI,EAAE,CAAC;AAEzD;;;;;;;;;;;;;;;;;;;;;;;;;;GA0BG;AACH,MAAM,UAAU,8BAA8B,CAE5C,EACA,eAAe,EACf,0BAA0B,EAC1B,oBAAoB,EACpB,sBAAsB,GAAG,GAGvB,EAAE,CAAC,CAAC,EAAE,CAAC,EACT,SAAS,EACT,eAAe,EAAE,oBAAoB,EACrC,MAAM,GAaP;IACC,IAAI,eAAe,GAAG,oBAAoB,CAAC;IAC3C,IAAI,aAAwC,CAAC;IAE7C,MAAM,0BAA0B,GAAG,GAAkB,EAAE;QACrD,aAAa,KAAb,aAAa,GAAK,mBAAmB,CAAC;YACpC,EAAE,EAAE,eAAe;YACnB,aAAa,EAAE,0BAA0B;YACzC,oBAAoB;YACpB,sBAAsB;YACtB,SAAS;YACT,eAAe;YACf,MAAM;SACP,CAAC,EAAC;QAEH,IAAI,aAAa,KAAK,SAAS,EAAE,CAAC;YAChC,MAAM,IAAI,KAAK,CACb,wFAAwF,CACzF,CAAC;QACJ,CAAC;QAED,OAAO,aAAa,CAAC;IACvB,CAAC,CAAC;IAEF,MAAM,aAAa,GAAG,IAAI,KAAK,CAAC,oBAAoB,EAAE;QACpD,GAAG,CACD,OAAgB,EAChB,YAAyB,EACzB,QAAiB;YAKjB,IAAI,YAAY,KAAK,wBAAwB,EAAE,CAAC;gBAC9C,OAAO,aAAa,EAAE,QAAQ,CAAC;YACjC,CAAC;YAED,MAAM,EAAE,QAAQ,EAAE,GAAG,0BAA0B,EAAE,CAAC;YAElD,IAAI,YAAY,IAAI,QAAQ,EAAE,CAAC;gBAC7B,+DAA+D;gBAC/D,cAAc;gBACd,MAAM,KAAK,GAAG,QAAQ,CAAC,YAAqC,CAAC,CAAC;gBAC9D,IAAI,OAAO,KAAK,KAAK,UAAU,EAAE,CAAC;oBAChC,kEAAkE;oBAClE,2DAA2D;oBAC3D,gDAAgD;oBAChD,OAAO,UAAyB,GAAG,IAAe;wBAChD,mEAAmE;wBACnE,gEAAgE;wBAChE,sBAAsB;wBACtB,OAAO,KAAK,CAAC,KAAK,CAAC,IAAI,KAAK,QAAQ,CAAC,CAAC,CAAC,QAAQ,CAAC,CAAC,CAAC,IAAI,EAAE,IAAI,CAAC,CAAC;oBAChE,CAAC,CAAC;gBACJ,CAAC;gBACD,OAAO,KAAK,CAAC;YACf,CAAC;YAED,OAAO,SAAS,CAAC;QACnB,CAAC;QAED,gCAAgC;QAChC,8DAA8D;QAC9D,GAAG,CAAC,OAAY,EAAE,YAAyB;YACzC,IAAI,YAAY,KAAK,wBAAwB,EAAE,CAAC;gBAC9C,OAAO,IAAI,CAAC;YACd,CAAC;YACD,MAAM,EAAE,QAAQ,EAAE,GAAG,0BAA0B,EAAE,CAAC;YAClD,OAAO,YAAY,IAAI,QAAQ,CAAC;QAClC,CAAC;KACF,CAAC,CAAC;IAEH,MAAM,iBAAiB,GAA4C,IAAI,KAAK,CAC1E,oBAAoB,EACpB;QACE,GAAG,CACD,OAAgB,EAChB,YAAyB,EACzB,QAAiB;YAKjB,IAAI,YAAY,KAAK,wBAAwB,EAAE,CAAC;gBAC9C,OAAO,aAAa,EAAE,YAAY,CAAC;YACrC,CAAC;YAED,MAAM,EAAE,YAAY,EAAE,GAAG,0BAA0B,EAAE,CAAC;YAEtD,IAAI,YAAY,IAAI,YAAY,EAAE,CAAC;gBACjC,+DAA+D;gBAC/D,cAAc;gBACd,MAAM,KAAK,GAAG,YAAY,CAAC,YAAyC,CAAC,CAAC;gBACtE,IAAI,OAAO,KAAK,KAAK,UAAU,EAAE,CAAC;oBAChC,kEAAkE;oBAClE,2DAA2D;oBAC3D,gDAAgD;oBAChD,OAAO,UAAyB,GAAG,IAAe;wBAChD,wDAAwD;wBACxD,+DAA+D;wBAC/D,kCAAkC;wBAClC,OAAO,KAAK,CAAC,KAAK,CAAC,IAAI,KAAK,QAAQ,CAAC,CAAC,CAAC,YAAY,CAAC,CAAC,CAAC,IAAI,EAAE,IAAI,CAAC,CAAC;oBACpE,CAAC,CAAC;gBACJ,CAAC;gBACD,OAAO,KAAK,CAAC;YACf,CAAC;YAED,OAAO,SAAS,CAAC;QACnB,CAAC;QAED,gCAAgC;QAChC,8DAA8D;QAC9D,GAAG,CAAC,OAAY,EAAE,YAAyB;YACzC,IAAI,YAAY,KAAK,wBAAwB,EAAE,CAAC;gBAC9C,OAAO,IAAI,CAAC;YACd,CAAC;YACD,MAAM,EAAE,YAAY,EAAE,GAAG,0BAA0B,EAAE,CAAC;YACtD,OAAO,YAAY,IAAI,YAAY,CAAC;QACtC,CAAC;KACF,CACF,CAAC;IAEF,MAAM,OAAO,GAAG,GAAS,EAAE;QACzB,aAAa,EAAE,OAAO,EAAE,CAAC;IAC3B,CAAC,CAAC;IAEF,MAAM,kBAAkB,GAAG,CAAC,kBAAmC,EAAQ,EAAE;QACvE,eAAe,GAAG,kBAAkB,CAAC;QACrC,OAAO,EAAE,CAAC;QACV,aAAa,GAAG,SAAS,CAAC;IAC5B,CAAC,CAAC;IAEF,OAAO;QACL,aAAa,EAAE,0BAA0B;QACzC,QAAQ,EAAE,aAAa;QACvB,YAAY,EAAE,iBAAiB;QAC/B,OAAO;QACP,kBAAkB;KACnB,CAAC;AACJ,CAAC","sourcesContent":["import type { PollingBlockTrackerOptions } from '@metamask/eth-block-tracker';\nimport { Json } from '@metamask/utils';\nimport type { Logger } from 'loglevel';\n\nimport type { NetworkClient } from './create-network-client.js';\nimport { createNetworkClient } from './create-network-client.js';\nimport type {\n  NetworkClientId,\n  NetworkControllerMessenger,\n} from './NetworkController.js';\nimport type { RpcServiceOptionsWithDefaults } from './rpc-service/rpc-service.js';\nimport type { RpcFailoverMode } from './selectors.js';\nimport type {\n  BlockTracker,\n  NetworkClientConfiguration,\n  Provider,\n} from './types.js';\n\n/**\n * The name of the method on both the provider and block tracker proxy which can\n * be used to get the underlying provider or block tracker from the network\n * client, when it is initialized.\n */\nconst REFLECTIVE_PROPERTY_NAME = '__target__';\n\n/**\n * Represents a proxy object which wraps a target object. As a proxy, it allows\n * for accessing and setting all of the properties that the target object\n * supports, but also supports an extra propertyName (`__target__`) to access\n * the target itself.\n *\n * @template Type - The type of the target object. It is assumed that this type\n * will be constant even when the target is swapped.\n */\nexport type ProxyWithAccessibleTarget<TargetType> = TargetType & {\n  [REFLECTIVE_PROPERTY_NAME]: TargetType;\n};\n\n/**\n * An object that provides the same interface as a network client but where the\n * network client is not initialized until either the provider or block tracker\n * is first accessed.\n */\nexport type AutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n> = {\n  configuration: Configuration;\n  provider: ProxyWithAccessibleTarget<Provider>;\n  blockTracker: ProxyWithAccessibleTarget<BlockTracker>;\n  destroy: () => void;\n  setRpcFailoverMode: (rpcFailoverMode: RpcFailoverMode) => void;\n};\n\n/**\n * By default, the provider and block provider proxies will point to nothing.\n * This is impossible when using the Proxy API, as the target object has to be\n * something, so this object represents that \"something\".\n */\nconst UNINITIALIZED_TARGET = { __UNINITIALIZED__: true };\n\n/**\n * This function creates two proxies, one that wraps a provider and another that\n * wraps a block tracker. These proxies are unique in that both will be \"empty\"\n * at first; that is, neither will point to a functional provider or block\n * tracker. Instead, as soon as a method or event is accessed on either object\n * that requires a network request to function, a network client is created on\n * the fly and the method or event in question is then forwarded to whichever\n * part of the network client is serving as the receiver. The network client is\n * then cached for subsequent usages.\n *\n * @param args - The arguments.\n * @param args.networkClientId - The ID that will be assigned to the new network\n * client in the registry.\n * @param args.networkClientConfiguration - The configuration object that will be\n * used to instantiate the network client when it is needed.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @param args.logger - A `loglevel` logger.\n * @returns The auto-managed network client.\n */\nexport function createAutoManagedNetworkClient<\n  Configuration extends NetworkClientConfiguration,\n>({\n  networkClientId,\n  networkClientConfiguration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions = (): Omit<\n    PollingBlockTrackerOptions,\n    'provider'\n  > => ({}),\n  messenger,\n  rpcFailoverMode: givenRpcFailoverMode,\n  logger,\n}: {\n  networkClientId: NetworkClientId;\n  networkClientConfiguration: Configuration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions?: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): AutoManagedNetworkClient<Configuration> {\n  let rpcFailoverMode = givenRpcFailoverMode;\n  let networkClient: NetworkClient | undefined;\n\n  const ensureNetworkClientCreated = (): NetworkClient => {\n    networkClient ??= createNetworkClient({\n      id: networkClientId,\n      configuration: networkClientConfiguration,\n      getRpcServiceOptions,\n      getBlockTrackerOptions,\n      messenger,\n      rpcFailoverMode,\n      logger,\n    });\n\n    if (networkClient === undefined) {\n      throw new Error(\n        \"It looks like `createNetworkClient` didn't return anything. Perhaps it's being mocked?\",\n      );\n    }\n\n    return networkClient;\n  };\n\n  const providerProxy = new Proxy(UNINITIALIZED_TARGET, {\n    get(\n      _target: unknown,\n      propertyName: PropertyKey,\n      receiver: unknown,\n    ):\n      | Provider\n      | ((this: unknown, ...args: unknown[]) => Promise<Json> | undefined)\n      | undefined {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return networkClient?.provider;\n      }\n\n      const { provider } = ensureNetworkClientCreated();\n\n      if (propertyName in provider) {\n        // Typecast: We know that `[propertyName]` is a propertyName on\n        // `provider`.\n        const value = provider[propertyName as keyof typeof provider];\n        if (typeof value === 'function') {\n          // Ensure that the method on the provider is called with `this` as\n          // the target, *not* the proxy (which happens by default) —\n          // this allows private properties to be accessed\n          return function (this: unknown, ...args: unknown[]): Promise<Json> {\n            // @ts-expect-error We don't care that `this` may not be compatible\n            // with the signature of the method being called, as technically\n            // it can be anything.\n            return value.apply(this === receiver ? provider : this, args);\n          };\n        }\n        return value;\n      }\n\n      return undefined;\n    },\n\n    // TODO: Replace `any` with type\n    // eslint-disable-next-line @typescript-eslint/no-explicit-any\n    has(_target: any, propertyName: PropertyKey): boolean {\n      if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n        return true;\n      }\n      const { provider } = ensureNetworkClientCreated();\n      return propertyName in provider;\n    },\n  });\n\n  const blockTrackerProxy: ProxyWithAccessibleTarget<BlockTracker> = new Proxy(\n    UNINITIALIZED_TARGET,\n    {\n      get(\n        _target: unknown,\n        propertyName: PropertyKey,\n        receiver: unknown,\n      ):\n        | BlockTracker\n        | ((this: unknown, ...args: unknown[]) => unknown)\n        | undefined {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return networkClient?.blockTracker;\n        }\n\n        const { blockTracker } = ensureNetworkClientCreated();\n\n        if (propertyName in blockTracker) {\n          // Typecast: We know that `[propertyName]` is a propertyName on\n          // `provider`.\n          const value = blockTracker[propertyName as keyof typeof blockTracker];\n          if (typeof value === 'function') {\n            // Ensure that the method on the provider is called with `this` as\n            // the target, *not* the proxy (which happens by default) —\n            // this allows private properties to be accessed\n            return function (this: unknown, ...args: unknown[]) {\n              // @ts-expect-error We don't care that `this` may not be\n              // compatible with the signature of the method being called, as\n              // technically it can be anything.\n              return value.apply(this === receiver ? blockTracker : this, args);\n            };\n          }\n          return value;\n        }\n\n        return undefined;\n      },\n\n      // TODO: Replace `any` with type\n      // eslint-disable-next-line @typescript-eslint/no-explicit-any\n      has(_target: any, propertyName: PropertyKey): boolean {\n        if (propertyName === REFLECTIVE_PROPERTY_NAME) {\n          return true;\n        }\n        const { blockTracker } = ensureNetworkClientCreated();\n        return propertyName in blockTracker;\n      },\n    },\n  );\n\n  const destroy = (): void => {\n    networkClient?.destroy();\n  };\n\n  const setRpcFailoverMode = (newRpcFailoverMode: RpcFailoverMode): void => {\n    rpcFailoverMode = newRpcFailoverMode;\n    destroy();\n    networkClient = undefined;\n  };\n\n  return {\n    configuration: networkClientConfiguration,\n    provider: providerProxy,\n    blockTracker: blockTrackerProxy,\n    destroy,\n    setRpcFailoverMode,\n  };\n}\n"]}

dist/create-network-client.cjs

@@ -14,5 +14,5 @@ "use strict";
 const utils_1 = require("@metamask/utils");
-const rpc_service_1 = require("./rpc-service/rpc-service.cjs");
-const rpc_service_chain_1 = require("./rpc-service/rpc-service-chain.cjs");
-const types_1 = require("./types.cjs");
+const rpc_service_chain_js_1 = require("./rpc-service/rpc-service-chain.cjs");
+const rpc_service_js_1 = require("./rpc-service/rpc-service.cjs");
+const types_js_1 = require("./types.cjs");
 const SECOND = 1000;
@@ -29,15 +29,15 @@ /**
     }
-    if ((0, rpc_service_1.isConnectionError)(error)) {
+    if ((0, rpc_service_js_1.isConnectionError)(error)) {
         return 'connection_failed';
     }
-    if ((0, rpc_service_1.isJsonParseError)(error)) {
+    if ((0, rpc_service_js_1.isJsonParseError)(error)) {
         return 'response_not_json';
     }
-    if ((0, rpc_service_1.isHttpServerError)(error)) {
+    if ((0, rpc_service_js_1.isHttpServerError)(error)) {
         return 'non_successful_http_status';
     }
-    if ((0, rpc_service_1.isTimeoutError)(error)) {
+    if ((0, rpc_service_js_1.isTimeoutError)(error)) {
         return 'timed_out';
     }
-    if ((0, rpc_service_1.isConnectionResetError)(error)) {
+    if ((0, rpc_service_js_1.isConnectionResetError)(error)) {
         return 'connection_reset';
@@ -68,3 +68,3 @@ }
 function createNetworkClient({ id, configuration, getRpcServiceOptions, getBlockTrackerOptions, messenger, rpcFailoverMode, logger, }) {
-    const primaryEndpointUrl = configuration.type === types_1.NetworkClientType.Infura
+    const primaryEndpointUrl = configuration.type === types_js_1.NetworkClientType.Infura
         ? `https://${configuration.network}.infura.io/v3/${configuration.infuraProjectId}`
@@ -82,3 +82,3 @@ : configuration.rpcUrl;
     let rpcApiMiddleware;
-    if (configuration.type === types_1.NetworkClientType.Infura) {
+    if (configuration.type === types_js_1.NetworkClientType.Infura) {
         rpcApiMiddleware = (0, json_rpc_engine_1.asV2Middleware)((0, eth_json_rpc_infura_1.createInfuraMiddleware)({
@@ -101,6 +101,6 @@ rpcService: rpcServiceChain,
     });
-    const networkMiddleware = configuration.type === types_1.NetworkClientType.Infura
+    const networkMiddleware = configuration.type === types_js_1.NetworkClientType.Infura
         ? createInfuraNetworkMiddleware({
             blockTracker,
-            network: configuration.network,
+            chainId: configuration.chainId,
             rpcProvider,
@@ -253,3 +253,3 @@ rpcApiMiddleware,
     };
-    const rpcServiceChain = new rpc_service_chain_1.RpcServiceChain([
+    const rpcServiceChain = new rpc_service_chain_js_1.RpcServiceChain([
         rpcServiceConfigurations[0],
@@ -350,3 +350,3 @@ ...rpcServiceConfigurations.slice(1),
         // eslint-disable-next-line no-restricted-globals
-        process.env.IN_TEST && networkClientType === types_1.NetworkClientType.Custom
+        process.env.IN_TEST && networkClientType === types_js_1.NetworkClientType.Custom
             ? (0, utils_1.inMilliseconds)(1, utils_1.Duration.Second)
@@ -367,3 +367,3 @@ : (0, utils_1.inMilliseconds)(20, utils_1.Duration.Second),
  * @param args.blockTracker - The block tracker to use.
- * @param args.network - The Infura network to use.
+ * @param args.chainId - The chain id to use.
  * @param args.rpcProvider - The RPC provider to use.
@@ -373,6 +373,6 @@ * @param args.rpcApiMiddleware - Additional middleware.
  */
-function createInfuraNetworkMiddleware({ blockTracker, network, rpcProvider, rpcApiMiddleware, }) {
+function createInfuraNetworkMiddleware({ blockTracker, chainId, rpcProvider, rpcApiMiddleware, }) {
     return v2_1.JsonRpcEngineV2.create({
         middleware: [
-            createNetworkAndChainIdMiddleware({ network }),
+            createNetworkAndChainIdMiddleware({ chainId }),
             (0, eth_json_rpc_middleware_1.createBlockCacheMiddleware)({ blockTracker }),
@@ -391,8 +391,8 @@ (0, eth_json_rpc_middleware_1.createInflightCacheMiddleware)(),
  * @param args - The Arguments.
- * @param args.network - The Infura network to use.
+ * @param args.chainId - The chain id to use.
  * @returns The middleware that implements the eth_chainId method.
  */
-function createNetworkAndChainIdMiddleware({ network, }) {
+function createNetworkAndChainIdMiddleware({ chainId, }) {
     return (0, v2_1.createScaffoldMiddleware)({
-        eth_chainId: controller_utils_1.ChainId[network],
+        eth_chainId: chainId,
     });
@@ -399,0 +399,0 @@ }

dist/create-network-client.cjs.map

@@ -1,1 +0,1 @@
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{ CONNECTIVITY_STATUSES } from '@metamask/connectivity-controller';\nimport type {\n  CockatielFailureReason,\n  InfuraNetworkType,\n} from '@metamask/controller-utils';\nimport {\n  ChainId,\n  DEFAULT_MAX_CONSECUTIVE_FAILURES,\n  DEFAULT_MAX_RETRIES,\n} from '@metamask/controller-utils';\nimport type { PollingBlockTrackerOptions } from '@metamask/eth-block-tracker';\nimport { PollingBlockTracker } from '@metamask/eth-block-tracker';\nimport { createInfuraMiddleware } from '@metamask/eth-json-rpc-infura';\nimport {\n  createBlockCacheMiddleware,\n  createBlockRefMiddleware,\n  createBlockRefRewriteMiddleware,\n  createBlockTrackerInspectorMiddleware,\n  createInflightCacheMiddleware,\n  createFetchMiddleware,\n  createRetryOnEmptyMiddleware,\n} from '@metamask/eth-json-rpc-middleware';\nimport { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport { providerFromMiddlewareV2 } from '@metamask/eth-json-rpc-provider';\nimport { asV2Middleware } from '@metamask/json-rpc-engine';\nimport {\n  createScaffoldMiddleware,\n  JsonRpcEngineV2,\n} from '@metamask/json-rpc-engine/v2';\nimport type {\n  JsonRpcMiddleware,\n  MiddlewareContext,\n} from '@metamask/json-rpc-engine/v2';\nimport { inMilliseconds, Duration } from '@metamask/utils';\nimport type { Hex, Json, JsonRpcRequest } from '@metamask/utils';\nimport type { Logger } from 'loglevel';\n\nimport type {\n  NetworkClientId,\n  NetworkControllerMessenger,\n} from './NetworkController';\nimport type { RpcServiceOptionsWithDefaults } from './rpc-service/rpc-service';\nimport {\n  isConnectionError,\n  isConnectionResetError,\n  isJsonParseError,\n  isHttpServerError,\n  isTimeoutError,\n} from './rpc-service/rpc-service';\nimport { RpcServiceChain } from './rpc-service/rpc-service-chain';\nimport type { RpcFailoverMode } from './selectors';\nimport type {\n  BlockTracker,\n  NetworkClientConfiguration,\n  Provider,\n} from './types';\nimport { NetworkClientType } from './types';\n\nconst SECOND = 1000;\n\n/**\n * Why the degraded event was emitted.\n */\nexport type DegradedEventType = 'slow_success' | 'retries_exhausted';\n\n/**\n * The category of error that was retried until retries were exhausted.\n */\nexport type RetryReason =\n  | 'connection_failed'\n  | 'response_not_json'\n  | 'non_successful_http_status'\n  | 'timed_out'\n  | 'connection_reset'\n  | 'unknown';\n\n/**\n * Classifies the error that was being retried when retries were exhausted.\n *\n * @param error - The error from the last retry attempt.\n * @returns A classification string.\n */\nexport function classifyRetryReason(error: unknown): RetryReason {\n  if (!(error instanceof Error)) {\n    return 'unknown';\n  }\n  if (isConnectionError(error)) {\n    return 'connection_failed';\n  }\n  if (isJsonParseError(error)) {\n    return 'response_not_json';\n  }\n  if (isHttpServerError(error)) {\n    return 'non_successful_http_status';\n  }\n  if (isTimeoutError(error)) {\n    return 'timed_out';\n  }\n  if (isConnectionResetError(error)) {\n    return 'connection_reset';\n  }\n  return 'unknown';\n}\n\n/**\n * The pair of provider / block tracker that can be used to interface with the\n * network and respond to new activity.\n */\nexport type NetworkClient = {\n  configuration: NetworkClientConfiguration;\n  provider: Provider;\n  blockTracker: BlockTracker;\n  destroy: () => void;\n};\n\ntype RpcApiMiddleware = JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string }>\n>;\n\n/**\n * Create a JSON RPC network client for a specific network.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The network client.\n */\nexport function createNetworkClient({\n  id,\n  configuration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): NetworkClient {\n  const primaryEndpointUrl =\n    configuration.type === NetworkClientType.Infura\n      ? `https://${configuration.network}.infura.io/v3/${configuration.infuraProjectId}`\n      : configuration.rpcUrl;\n  const rpcServiceChain = createRpcServiceChain({\n    id,\n    primaryEndpointUrl,\n    configuration,\n    getRpcServiceOptions,\n    messenger,\n    rpcFailoverMode,\n    logger,\n  });\n\n  let rpcApiMiddleware: RpcApiMiddleware;\n  if (configuration.type === NetworkClientType.Infura) {\n    rpcApiMiddleware = asV2Middleware(\n      createInfuraMiddleware({\n        rpcService: rpcServiceChain,\n        options: {\n          source: 'metamask',\n        },\n      }),\n    );\n  } else {\n    rpcApiMiddleware = createFetchMiddleware({ rpcService: rpcServiceChain });\n  }\n\n  const rpcProvider = providerFromMiddlewareV2(rpcApiMiddleware);\n\n  const blockTracker = createBlockTracker({\n    networkClientType: configuration.type,\n    endpointUrl: primaryEndpointUrl,\n    getOptions: getBlockTrackerOptions,\n    provider: rpcProvider,\n  });\n\n  const networkMiddleware =\n    configuration.type === NetworkClientType.Infura\n      ? createInfuraNetworkMiddleware({\n          blockTracker,\n          network: configuration.network,\n          rpcProvider,\n          rpcApiMiddleware,\n        })\n      : createCustomNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcApiMiddleware,\n        });\n\n  const provider: Provider = new InternalProvider({\n    engine: JsonRpcEngineV2.create({\n      middleware: [networkMiddleware],\n    }),\n  });\n\n  const destroy = (): void => {\n    // TODO: Either fix this lint violation or explain why it's necessary to ignore.\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    blockTracker.destroy();\n  };\n\n  return { configuration, provider, blockTracker, destroy };\n}\n\n/**\n * Determines the ordered list of endpoints that make up the RPC service chain\n * for a network, honoring the RPC failover flags.\n *\n * @param args - The arguments.\n * @param args.primaryEndpointUrl - The primary endpoint URL for the network.\n * @param args.failoverRpcUrls - The configured failover URLs, if any.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @returns The endpoints to use, each flagged as primary or failover.\n */\nfunction getAvailableEndpoints({\n  primaryEndpointUrl,\n  failoverRpcUrls,\n  rpcFailoverMode,\n}: {\n  primaryEndpointUrl: string;\n  failoverRpcUrls: string[] | undefined;\n  rpcFailoverMode: RpcFailoverMode;\n}): { url: string; isFailover: boolean }[] {\n  const failoverEndpoints = (failoverRpcUrls ?? []).map((url) => ({\n    url,\n    isFailover: true,\n  }));\n  // We explicitly check the URL since some networks have been added with invalid configuration types in the past.\n  const isInfura = new URL(primaryEndpointUrl).hostname.endsWith('.infura.io');\n\n  if (\n    rpcFailoverMode === 'forced' &&\n    isInfura &&\n    failoverEndpoints.length > 0\n  ) {\n    // Forced mode for an Infura endpoint with failovers: bypass Infura entirely\n    // and route all traffic (including block polling) to failovers. The first\n    // failover becomes the positional primary of the chain, so\n    // availability/degraded events will report that failover URL as the primary\n    // endpoint (there is no Infura primary in this mode).\n    return failoverEndpoints;\n  }\n  if (rpcFailoverMode === 'enabled' && isInfura) {\n    return [\n      { url: primaryEndpointUrl, isFailover: false },\n      ...failoverEndpoints,\n    ];\n  }\n  return [{ url: primaryEndpointUrl, isFailover: false }];\n}\n\n/**\n * Creates an RPC service chain, which represents the primary endpoint URL for\n * the network as well as its failover URLs.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.primaryEndpointUrl - The primary endpoint URL.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The RPC service chain.\n */\nfunction createRpcServiceChain({\n  id,\n  primaryEndpointUrl,\n  configuration,\n  getRpcServiceOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  primaryEndpointUrl: string;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): RpcServiceChain {\n  const availableEndpoints = getAvailableEndpoints({\n    primaryEndpointUrl,\n    failoverRpcUrls: configuration.failoverRpcUrls,\n    rpcFailoverMode,\n  });\n\n  const isOffline = (): boolean => {\n    const connectivityState = messenger.call('ConnectivityController:getState');\n    return (\n      connectivityState.connectivityStatus === CONNECTIVITY_STATUSES.Offline\n    );\n  };\n\n  // Ensure that if the endpoint continually responds with errors, we\n  // break the circuit relatively fast (but not prematurely).\n  //\n  // Note that the circuit will break much faster if the errors are\n  // retriable (e.g. 503) than if not (e.g. 500), so we attempt to strike\n  // a balance here.\n  const maxConsecutiveFailures = DEFAULT_MAX_CONSECUTIVE_FAILURES;\n\n  // The number of rounds of retries that will break the circuit,\n  // triggering a \"cooldown\".\n  //\n  // When we fail over to QuickNode, we expect it to be down at first\n  // while it is being automatically activated, and we don't want to\n  // activate the \"cooldown\" accidentally.\n  const maxConsecutiveFailuresFailover = (DEFAULT_MAX_RETRIES + 1) * 10;\n\n  const rpcServiceConfigurations = availableEndpoints.map((endpoint) => {\n    const overriddenOptions = getRpcServiceOptions?.(endpoint.url) ?? {};\n    return {\n      fetch: globalThis.fetch.bind(globalThis),\n      btoa: globalThis.btoa.bind(globalThis),\n      isOffline,\n      policyOptions: {\n        maxRetries: DEFAULT_MAX_RETRIES,\n        circuitBreakDuration: inMilliseconds(30, Duration.Second),\n        maxConsecutiveFailures: endpoint.isFailover\n          ? maxConsecutiveFailuresFailover\n          : maxConsecutiveFailures,\n        ...(overriddenOptions.policyOptions ?? {}),\n      },\n      ...overriddenOptions,\n      endpointUrl: endpoint.url,\n      logger,\n    };\n  });\n\n  /**\n   * Extracts the error from Cockatiel's `FailureReason` type received in\n   * circuit breaker event handlers.\n   *\n   * The `FailureReason` object can have two possible shapes:\n   * - `{ error: Error }` - When the RPC service throws an error (the common\n   * case for RPC failures).\n   * - `{ value: T }` - When the RPC service returns a value that the retry\n   * filter policy considers a failure.\n   *\n   * @param value - The event data object from the circuit breaker event\n   * listener (after destructuring known properties like `endpointUrl`). This\n   * represents Cockatiel's `FailureReason` type.\n   * @returns The error or failure value, or `undefined` if neither property\n   * exists (which shouldn't happen in practice unless the circuit breaker is\n   * manually isolated).\n   */\n  const getError = (\n    value: CockatielFailureReason<unknown> | Record<never, never>,\n  ): Error | unknown | undefined => {\n    if ('error' in value) {\n      return value.error;\n    } else if ('value' in value) {\n      return value.value;\n    }\n    return undefined;\n  };\n\n  const rpcServiceChain = new RpcServiceChain([\n    rpcServiceConfigurations[0],\n    ...rpcServiceConfigurations.slice(1),\n  ]);\n\n  rpcServiceChain.onBreak((data) => {\n    const error = getError(data);\n\n    if (error === undefined) {\n      // This error shouldn't happen in practice because we never call `.isolate`\n      // on the circuit breaker policy, but we need to appease TypeScript.\n      throw new Error('Could not make request to endpoint.');\n    }\n\n    messenger.publish('NetworkController:rpcEndpointChainUnavailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n      error,\n    });\n  });\n\n  rpcServiceChain.onServiceBreak(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      ...rest\n    }) => {\n      const error = getError(rest);\n\n      if (error === undefined) {\n        // This error shouldn't happen in practice because we never call `.isolate`\n        // on the circuit breaker policy, but we need to appease TypeScript.\n        throw new Error('Could not make request to endpoint.');\n      }\n\n      messenger.publish('NetworkController:rpcEndpointUnavailable', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n      });\n    },\n  );\n\n  rpcServiceChain.onDegraded(\n    ({ rpcMethodName, duration, traceId, ...rest }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n      messenger.publish('NetworkController:rpcEndpointChainDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onServiceDegraded(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      rpcMethodName,\n      duration,\n      traceId,\n      ...rest\n    }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n\n      messenger.publish('NetworkController:rpcEndpointDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onAvailable(() => {\n    messenger.publish('NetworkController:rpcEndpointChainAvailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n    });\n  });\n\n  rpcServiceChain.onServiceRetry(\n    ({\n      attempt,\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n    }) => {\n      messenger.publish('NetworkController:rpcEndpointRetried', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        attempt,\n      });\n    },\n  );\n\n  return rpcServiceChain;\n}\n\n/**\n * Create the block tracker for the network.\n *\n * @param args - The arguments.\n * @param args.networkClientType - The type of the network client (\"infura\" or\n * \"custom\").\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.getOptions - Factory for the block tracker options.\n * @param args.provider - The EIP-1193 provider for the network's JSON-RPC\n * middleware stack.\n * @returns The created block tracker.\n */\nfunction createBlockTracker({\n  networkClientType,\n  endpointUrl,\n  getOptions,\n  provider,\n}: {\n  networkClientType: NetworkClientType;\n  endpointUrl: string;\n  getOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  provider: InternalProvider;\n}): PollingBlockTracker {\n  const defaultOptions = {\n    pollingInterval:\n      // Needed for testing.\n      // eslint-disable-next-line no-restricted-globals\n      process.env.IN_TEST && networkClientType === NetworkClientType.Custom\n        ? inMilliseconds(1, Duration.Second)\n        : inMilliseconds(20, Duration.Second),\n    retryTimeout: inMilliseconds(20, Duration.Second),\n  };\n\n  return new PollingBlockTracker({\n    ...defaultOptions,\n    ...getOptions(endpointUrl),\n    provider,\n  });\n}\n\n/**\n * Create middleware for infura.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.network - The Infura network to use.\n * @param args.rpcProvider - The RPC provider to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createInfuraNetworkMiddleware({\n  blockTracker,\n  network,\n  rpcProvider,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  network: InfuraNetworkType;\n  rpcProvider: InternalProvider;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  return JsonRpcEngineV2.create({\n    middleware: [\n      createNetworkAndChainIdMiddleware({ network }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockRefMiddleware({ blockTracker, provider: rpcProvider }),\n      createRetryOnEmptyMiddleware({ blockTracker, provider: rpcProvider }),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * Creates static method middleware.\n *\n * @param args - The Arguments.\n * @param args.network - The Infura network to use.\n * @returns The middleware that implements the eth_chainId method.\n */\nfunction createNetworkAndChainIdMiddleware({\n  network,\n}: {\n  network: InfuraNetworkType;\n}): JsonRpcMiddleware<JsonRpcRequest> {\n  return createScaffoldMiddleware({\n    eth_chainId: ChainId[network],\n  });\n}\n\nconst createChainIdMiddleware = (\n  chainId: Hex,\n): JsonRpcMiddleware<JsonRpcRequest, Json> => {\n  return ({ request, next }) => {\n    if (request.method === 'eth_chainId') {\n      return chainId;\n    }\n    return next();\n  };\n};\n\n/**\n * Creates custom middleware.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createCustomNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: Hex;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  // Needed for testing.\n  // eslint-disable-next-line no-restricted-globals\n  const testMiddlewares = process.env.IN_TEST\n    ? [createEstimateGasDelayTestMiddleware()]\n    : [];\n\n  return JsonRpcEngineV2.create({\n    middleware: [\n      ...testMiddlewares,\n      createChainIdMiddleware(chainId),\n      createBlockRefRewriteMiddleware({ blockTracker }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * For use in tests only.\n * Adds a delay to `eth_estimateGas` calls.\n *\n * @returns The middleware for delaying gas estimation calls by 2 seconds when in test.\n */\nfunction createEstimateGasDelayTestMiddleware(): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json\n> {\n  return async ({ request, next }) => {\n    if (request.method === 'eth_estimateGas') {\n      await new Promise((resolve) => setTimeout(resolve, SECOND * 2));\n    }\n    return next();\n  };\n}\n"]}
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createScaffoldMiddleware,\n  JsonRpcEngineV2,\n} from '@metamask/json-rpc-engine/v2';\nimport type {\n  JsonRpcMiddleware,\n  MiddlewareContext,\n} from '@metamask/json-rpc-engine/v2';\nimport { inMilliseconds, Duration } from '@metamask/utils';\nimport type { Hex, Json, JsonRpcRequest } from '@metamask/utils';\nimport type { Logger } from 'loglevel';\n\nimport type {\n  NetworkClientId,\n  NetworkControllerMessenger,\n} from './NetworkController.js';\nimport { RpcServiceChain } from './rpc-service/rpc-service-chain.js';\nimport type { RpcServiceOptionsWithDefaults } from './rpc-service/rpc-service.js';\nimport {\n  isConnectionError,\n  isConnectionResetError,\n  isJsonParseError,\n  isHttpServerError,\n  isTimeoutError,\n} from './rpc-service/rpc-service.js';\nimport type { RpcFailoverMode } from './selectors.js';\nimport type {\n  BlockTracker,\n  NetworkClientConfiguration,\n  Provider,\n} from './types.js';\nimport { NetworkClientType } from './types.js';\n\nconst SECOND = 1000;\n\n/**\n * Why the degraded event was emitted.\n */\nexport type DegradedEventType = 'slow_success' | 'retries_exhausted';\n\n/**\n * The category of error that was retried until retries were exhausted.\n */\nexport type RetryReason =\n  | 'connection_failed'\n  | 'response_not_json'\n  | 'non_successful_http_status'\n  | 'timed_out'\n  | 'connection_reset'\n  | 'unknown';\n\n/**\n * Classifies the error that was being retried when retries were exhausted.\n *\n * @param error - The error from the last retry attempt.\n * @returns A classification string.\n */\nexport function classifyRetryReason(error: unknown): RetryReason {\n  if (!(error instanceof Error)) {\n    return 'unknown';\n  }\n  if (isConnectionError(error)) {\n    return 'connection_failed';\n  }\n  if (isJsonParseError(error)) {\n    return 'response_not_json';\n  }\n  if (isHttpServerError(error)) {\n    return 'non_successful_http_status';\n  }\n  if (isTimeoutError(error)) {\n    return 'timed_out';\n  }\n  if (isConnectionResetError(error)) {\n    return 'connection_reset';\n  }\n  return 'unknown';\n}\n\n/**\n * The pair of provider / block tracker that can be used to interface with the\n * network and respond to new activity.\n */\nexport type NetworkClient = {\n  configuration: NetworkClientConfiguration;\n  provider: Provider;\n  blockTracker: BlockTracker;\n  destroy: () => void;\n};\n\ntype RpcApiMiddleware = JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string }>\n>;\n\n/**\n * Create a JSON RPC network client for a specific network.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The network client.\n */\nexport function createNetworkClient({\n  id,\n  configuration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): NetworkClient {\n  const primaryEndpointUrl =\n    configuration.type === NetworkClientType.Infura\n      ? `https://${configuration.network}.infura.io/v3/${configuration.infuraProjectId}`\n      : configuration.rpcUrl;\n  const rpcServiceChain = createRpcServiceChain({\n    id,\n    primaryEndpointUrl,\n    configuration,\n    getRpcServiceOptions,\n    messenger,\n    rpcFailoverMode,\n    logger,\n  });\n\n  let rpcApiMiddleware: RpcApiMiddleware;\n  if (configuration.type === NetworkClientType.Infura) {\n    rpcApiMiddleware = asV2Middleware(\n      createInfuraMiddleware({\n        rpcService: rpcServiceChain,\n        options: {\n          source: 'metamask',\n        },\n      }),\n    );\n  } else {\n    rpcApiMiddleware = createFetchMiddleware({ rpcService: rpcServiceChain });\n  }\n\n  const rpcProvider = providerFromMiddlewareV2(rpcApiMiddleware);\n\n  const blockTracker = createBlockTracker({\n    networkClientType: configuration.type,\n    endpointUrl: primaryEndpointUrl,\n    getOptions: getBlockTrackerOptions,\n    provider: rpcProvider,\n  });\n\n  const networkMiddleware =\n    configuration.type === NetworkClientType.Infura\n      ? createInfuraNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcProvider,\n          rpcApiMiddleware,\n        })\n      : createCustomNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcApiMiddleware,\n        });\n\n  const provider: Provider = new InternalProvider({\n    engine: JsonRpcEngineV2.create({\n      middleware: [networkMiddleware],\n    }),\n  });\n\n  const destroy = (): void => {\n    // TODO: Either fix this lint violation or explain why it's necessary to ignore.\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    blockTracker.destroy();\n  };\n\n  return { configuration, provider, blockTracker, destroy };\n}\n\n/**\n * Determines the ordered list of endpoints that make up the RPC service chain\n * for a network, honoring the RPC failover flags.\n *\n * @param args - The arguments.\n * @param args.primaryEndpointUrl - The primary endpoint URL for the network.\n * @param args.failoverRpcUrls - The configured failover URLs, if any.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @returns The endpoints to use, each flagged as primary or failover.\n */\nfunction getAvailableEndpoints({\n  primaryEndpointUrl,\n  failoverRpcUrls,\n  rpcFailoverMode,\n}: {\n  primaryEndpointUrl: string;\n  failoverRpcUrls: string[] | undefined;\n  rpcFailoverMode: RpcFailoverMode;\n}): { url: string; isFailover: boolean }[] {\n  const failoverEndpoints = (failoverRpcUrls ?? []).map((url) => ({\n    url,\n    isFailover: true,\n  }));\n  // We explicitly check the URL since some networks have been added with invalid configuration types in the past.\n  const isInfura = new URL(primaryEndpointUrl).hostname.endsWith('.infura.io');\n\n  if (\n    rpcFailoverMode === 'forced' &&\n    isInfura &&\n    failoverEndpoints.length > 0\n  ) {\n    // Forced mode for an Infura endpoint with failovers: bypass Infura entirely\n    // and route all traffic (including block polling) to failovers. The first\n    // failover becomes the positional primary of the chain, so\n    // availability/degraded events will report that failover URL as the primary\n    // endpoint (there is no Infura primary in this mode).\n    return failoverEndpoints;\n  }\n  if (rpcFailoverMode === 'enabled' && isInfura) {\n    return [\n      { url: primaryEndpointUrl, isFailover: false },\n      ...failoverEndpoints,\n    ];\n  }\n  return [{ url: primaryEndpointUrl, isFailover: false }];\n}\n\n/**\n * Creates an RPC service chain, which represents the primary endpoint URL for\n * the network as well as its failover URLs.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.primaryEndpointUrl - The primary endpoint URL.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The RPC service chain.\n */\nfunction createRpcServiceChain({\n  id,\n  primaryEndpointUrl,\n  configuration,\n  getRpcServiceOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  primaryEndpointUrl: string;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): RpcServiceChain {\n  const availableEndpoints = getAvailableEndpoints({\n    primaryEndpointUrl,\n    failoverRpcUrls: configuration.failoverRpcUrls,\n    rpcFailoverMode,\n  });\n\n  const isOffline = (): boolean => {\n    const connectivityState = messenger.call('ConnectivityController:getState');\n    return (\n      connectivityState.connectivityStatus === CONNECTIVITY_STATUSES.Offline\n    );\n  };\n\n  // Ensure that if the endpoint continually responds with errors, we\n  // break the circuit relatively fast (but not prematurely).\n  //\n  // Note that the circuit will break much faster if the errors are\n  // retriable (e.g. 503) than if not (e.g. 500), so we attempt to strike\n  // a balance here.\n  const maxConsecutiveFailures = DEFAULT_MAX_CONSECUTIVE_FAILURES;\n\n  // The number of rounds of retries that will break the circuit,\n  // triggering a \"cooldown\".\n  //\n  // When we fail over to QuickNode, we expect it to be down at first\n  // while it is being automatically activated, and we don't want to\n  // activate the \"cooldown\" accidentally.\n  const maxConsecutiveFailuresFailover = (DEFAULT_MAX_RETRIES + 1) * 10;\n\n  const rpcServiceConfigurations = availableEndpoints.map((endpoint) => {\n    const overriddenOptions = getRpcServiceOptions?.(endpoint.url) ?? {};\n    return {\n      fetch: globalThis.fetch.bind(globalThis),\n      btoa: globalThis.btoa.bind(globalThis),\n      isOffline,\n      policyOptions: {\n        maxRetries: DEFAULT_MAX_RETRIES,\n        circuitBreakDuration: inMilliseconds(30, Duration.Second),\n        maxConsecutiveFailures: endpoint.isFailover\n          ? maxConsecutiveFailuresFailover\n          : maxConsecutiveFailures,\n        ...(overriddenOptions.policyOptions ?? {}),\n      },\n      ...overriddenOptions,\n      endpointUrl: endpoint.url,\n      logger,\n    };\n  });\n\n  /**\n   * Extracts the error from Cockatiel's `FailureReason` type received in\n   * circuit breaker event handlers.\n   *\n   * The `FailureReason` object can have two possible shapes:\n   * - `{ error: Error }` - When the RPC service throws an error (the common\n   * case for RPC failures).\n   * - `{ value: T }` - When the RPC service returns a value that the retry\n   * filter policy considers a failure.\n   *\n   * @param value - The event data object from the circuit breaker event\n   * listener (after destructuring known properties like `endpointUrl`). This\n   * represents Cockatiel's `FailureReason` type.\n   * @returns The error or failure value, or `undefined` if neither property\n   * exists (which shouldn't happen in practice unless the circuit breaker is\n   * manually isolated).\n   */\n  const getError = (\n    value: CockatielFailureReason<unknown> | Record<never, never>,\n  ): Error | unknown | undefined => {\n    if ('error' in value) {\n      return value.error;\n    } else if ('value' in value) {\n      return value.value;\n    }\n    return undefined;\n  };\n\n  const rpcServiceChain = new RpcServiceChain([\n    rpcServiceConfigurations[0],\n    ...rpcServiceConfigurations.slice(1),\n  ]);\n\n  rpcServiceChain.onBreak((data) => {\n    const error = getError(data);\n\n    if (error === undefined) {\n      // This error shouldn't happen in practice because we never call `.isolate`\n      // on the circuit breaker policy, but we need to appease TypeScript.\n      throw new Error('Could not make request to endpoint.');\n    }\n\n    messenger.publish('NetworkController:rpcEndpointChainUnavailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n      error,\n    });\n  });\n\n  rpcServiceChain.onServiceBreak(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      ...rest\n    }) => {\n      const error = getError(rest);\n\n      if (error === undefined) {\n        // This error shouldn't happen in practice because we never call `.isolate`\n        // on the circuit breaker policy, but we need to appease TypeScript.\n        throw new Error('Could not make request to endpoint.');\n      }\n\n      messenger.publish('NetworkController:rpcEndpointUnavailable', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n      });\n    },\n  );\n\n  rpcServiceChain.onDegraded(\n    ({ rpcMethodName, duration, traceId, ...rest }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n      messenger.publish('NetworkController:rpcEndpointChainDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onServiceDegraded(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      rpcMethodName,\n      duration,\n      traceId,\n      ...rest\n    }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n\n      messenger.publish('NetworkController:rpcEndpointDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onAvailable(() => {\n    messenger.publish('NetworkController:rpcEndpointChainAvailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n    });\n  });\n\n  rpcServiceChain.onServiceRetry(\n    ({\n      attempt,\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n    }) => {\n      messenger.publish('NetworkController:rpcEndpointRetried', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        attempt,\n      });\n    },\n  );\n\n  return rpcServiceChain;\n}\n\n/**\n * Create the block tracker for the network.\n *\n * @param args - The arguments.\n * @param args.networkClientType - The type of the network client (\"infura\" or\n * \"custom\").\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.getOptions - Factory for the block tracker options.\n * @param args.provider - The EIP-1193 provider for the network's JSON-RPC\n * middleware stack.\n * @returns The created block tracker.\n */\nfunction createBlockTracker({\n  networkClientType,\n  endpointUrl,\n  getOptions,\n  provider,\n}: {\n  networkClientType: NetworkClientType;\n  endpointUrl: string;\n  getOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  provider: InternalProvider;\n}): PollingBlockTracker {\n  const defaultOptions = {\n    pollingInterval:\n      // Needed for testing.\n      // eslint-disable-next-line no-restricted-globals\n      process.env.IN_TEST && networkClientType === NetworkClientType.Custom\n        ? inMilliseconds(1, Duration.Second)\n        : inMilliseconds(20, Duration.Second),\n    retryTimeout: inMilliseconds(20, Duration.Second),\n  };\n\n  return new PollingBlockTracker({\n    ...defaultOptions,\n    ...getOptions(endpointUrl),\n    provider,\n  });\n}\n\n/**\n * Create middleware for infura.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcProvider - The RPC provider to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createInfuraNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcProvider,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: string;\n  rpcProvider: InternalProvider;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  return JsonRpcEngineV2.create({\n    middleware: [\n      createNetworkAndChainIdMiddleware({ chainId }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockRefMiddleware({ blockTracker, provider: rpcProvider }),\n      createRetryOnEmptyMiddleware({ blockTracker, provider: rpcProvider }),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * Creates static method middleware.\n *\n * @param args - The Arguments.\n * @param args.chainId - The chain id to use.\n * @returns The middleware that implements the eth_chainId method.\n */\nfunction createNetworkAndChainIdMiddleware({\n  chainId,\n}: {\n  chainId: string;\n}): JsonRpcMiddleware<JsonRpcRequest> {\n  return createScaffoldMiddleware({\n    eth_chainId: chainId,\n  });\n}\n\nconst createChainIdMiddleware = (\n  chainId: Hex,\n): JsonRpcMiddleware<JsonRpcRequest, Json> => {\n  return ({ request, next }) => {\n    if (request.method === 'eth_chainId') {\n      return chainId;\n    }\n    return next();\n  };\n};\n\n/**\n * Creates custom middleware.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createCustomNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: Hex;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  // Needed for testing.\n  // eslint-disable-next-line no-restricted-globals\n  const testMiddlewares = process.env.IN_TEST\n    ? [createEstimateGasDelayTestMiddleware()]\n    : [];\n\n  return JsonRpcEngineV2.create({\n    middleware: [\n      ...testMiddlewares,\n      createChainIdMiddleware(chainId),\n      createBlockRefRewriteMiddleware({ blockTracker }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * For use in tests only.\n * Adds a delay to `eth_estimateGas` calls.\n *\n * @returns The middleware for delaying gas estimation calls by 2 seconds when in test.\n */\nfunction createEstimateGasDelayTestMiddleware(): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json\n> {\n  return async ({ request, next }) => {\n    if (request.method === 'eth_estimateGas') {\n      await new Promise((resolve) => setTimeout(resolve, SECOND * 2));\n    }\n    return next();\n  };\n}\n"]}

dist/create-network-client.d.cts.map

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dist/create-network-client.d.mts.map

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dist/create-network-client.mjs

 import { CONNECTIVITY_STATUSES } from "@metamask/connectivity-controller";
-import { ChainId, DEFAULT_MAX_CONSECUTIVE_FAILURES, DEFAULT_MAX_RETRIES } from "@metamask/controller-utils";
+import { DEFAULT_MAX_CONSECUTIVE_FAILURES, DEFAULT_MAX_RETRIES } from "@metamask/controller-utils";
 import { PollingBlockTracker } from "@metamask/eth-block-tracker";
@@ -11,4 +11,4 @@ import { createInfuraMiddleware } from "@metamask/eth-json-rpc-infura";
 import { inMilliseconds, Duration } from "@metamask/utils";
+import { RpcServiceChain } from "./rpc-service/rpc-service-chain.mjs";
 import { isConnectionError, isConnectionResetError, isJsonParseError, isHttpServerError, isTimeoutError } from "./rpc-service/rpc-service.mjs";
-import { RpcServiceChain } from "./rpc-service/rpc-service-chain.mjs";
 import { NetworkClientType } from "./types.mjs";
@@ -97,3 +97,3 @@ const SECOND = 1000;
             blockTracker,
-            network: configuration.network,
+            chainId: configuration.chainId,
             rpcProvider,
@@ -357,3 +357,3 @@ rpcApiMiddleware,
  * @param args.blockTracker - The block tracker to use.
- * @param args.network - The Infura network to use.
+ * @param args.chainId - The chain id to use.
  * @param args.rpcProvider - The RPC provider to use.
@@ -363,6 +363,6 @@ * @param args.rpcApiMiddleware - Additional middleware.
  */
-function createInfuraNetworkMiddleware({ blockTracker, network, rpcProvider, rpcApiMiddleware, }) {
+function createInfuraNetworkMiddleware({ blockTracker, chainId, rpcProvider, rpcApiMiddleware, }) {
     return JsonRpcEngineV2.create({
         middleware: [
-            createNetworkAndChainIdMiddleware({ network }),
+            createNetworkAndChainIdMiddleware({ chainId }),
             createBlockCacheMiddleware({ blockTracker }),
@@ -381,8 +381,8 @@ createInflightCacheMiddleware(),
  * @param args - The Arguments.
- * @param args.network - The Infura network to use.
+ * @param args.chainId - The chain id to use.
  * @returns The middleware that implements the eth_chainId method.
  */
-function createNetworkAndChainIdMiddleware({ network, }) {
+function createNetworkAndChainIdMiddleware({ chainId, }) {
     return createScaffoldMiddleware({
-        eth_chainId: ChainId[network],
+        eth_chainId: chainId,
     });
@@ -389,0 +389,0 @@ }

dist/create-network-client.mjs.map

@@ -1,1 +0,1 @@
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{ CONNECTIVITY_STATUSES } from '@metamask/connectivity-controller';\nimport type {\n  CockatielFailureReason,\n  InfuraNetworkType,\n} from '@metamask/controller-utils';\nimport {\n  ChainId,\n  DEFAULT_MAX_CONSECUTIVE_FAILURES,\n  DEFAULT_MAX_RETRIES,\n} from '@metamask/controller-utils';\nimport type { PollingBlockTrackerOptions } from '@metamask/eth-block-tracker';\nimport { PollingBlockTracker } from '@metamask/eth-block-tracker';\nimport { createInfuraMiddleware } from '@metamask/eth-json-rpc-infura';\nimport {\n  createBlockCacheMiddleware,\n  createBlockRefMiddleware,\n  createBlockRefRewriteMiddleware,\n  createBlockTrackerInspectorMiddleware,\n  createInflightCacheMiddleware,\n  createFetchMiddleware,\n  createRetryOnEmptyMiddleware,\n} from '@metamask/eth-json-rpc-middleware';\nimport { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport { providerFromMiddlewareV2 } from '@metamask/eth-json-rpc-provider';\nimport { asV2Middleware } from '@metamask/json-rpc-engine';\nimport {\n  createScaffoldMiddleware,\n  JsonRpcEngineV2,\n} from '@metamask/json-rpc-engine/v2';\nimport type {\n  JsonRpcMiddleware,\n  MiddlewareContext,\n} from '@metamask/json-rpc-engine/v2';\nimport { inMilliseconds, Duration } from '@metamask/utils';\nimport type { Hex, Json, JsonRpcRequest } from '@metamask/utils';\nimport type { Logger } from 'loglevel';\n\nimport type {\n  NetworkClientId,\n  NetworkControllerMessenger,\n} from './NetworkController';\nimport type { RpcServiceOptionsWithDefaults } from './rpc-service/rpc-service';\nimport {\n  isConnectionError,\n  isConnectionResetError,\n  isJsonParseError,\n  isHttpServerError,\n  isTimeoutError,\n} from './rpc-service/rpc-service';\nimport { RpcServiceChain } from './rpc-service/rpc-service-chain';\nimport type { RpcFailoverMode } from './selectors';\nimport type {\n  BlockTracker,\n  NetworkClientConfiguration,\n  Provider,\n} from './types';\nimport { NetworkClientType } from './types';\n\nconst SECOND = 1000;\n\n/**\n * Why the degraded event was emitted.\n */\nexport type DegradedEventType = 'slow_success' | 'retries_exhausted';\n\n/**\n * The category of error that was retried until retries were exhausted.\n */\nexport type RetryReason =\n  | 'connection_failed'\n  | 'response_not_json'\n  | 'non_successful_http_status'\n  | 'timed_out'\n  | 'connection_reset'\n  | 'unknown';\n\n/**\n * Classifies the error that was being retried when retries were exhausted.\n *\n * @param error - The error from the last retry attempt.\n * @returns A classification string.\n */\nexport function classifyRetryReason(error: unknown): RetryReason {\n  if (!(error instanceof Error)) {\n    return 'unknown';\n  }\n  if (isConnectionError(error)) {\n    return 'connection_failed';\n  }\n  if (isJsonParseError(error)) {\n    return 'response_not_json';\n  }\n  if (isHttpServerError(error)) {\n    return 'non_successful_http_status';\n  }\n  if (isTimeoutError(error)) {\n    return 'timed_out';\n  }\n  if (isConnectionResetError(error)) {\n    return 'connection_reset';\n  }\n  return 'unknown';\n}\n\n/**\n * The pair of provider / block tracker that can be used to interface with the\n * network and respond to new activity.\n */\nexport type NetworkClient = {\n  configuration: NetworkClientConfiguration;\n  provider: Provider;\n  blockTracker: BlockTracker;\n  destroy: () => void;\n};\n\ntype RpcApiMiddleware = JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string }>\n>;\n\n/**\n * Create a JSON RPC network client for a specific network.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The network client.\n */\nexport function createNetworkClient({\n  id,\n  configuration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): NetworkClient {\n  const primaryEndpointUrl =\n    configuration.type === NetworkClientType.Infura\n      ? `https://${configuration.network}.infura.io/v3/${configuration.infuraProjectId}`\n      : configuration.rpcUrl;\n  const rpcServiceChain = createRpcServiceChain({\n    id,\n    primaryEndpointUrl,\n    configuration,\n    getRpcServiceOptions,\n    messenger,\n    rpcFailoverMode,\n    logger,\n  });\n\n  let rpcApiMiddleware: RpcApiMiddleware;\n  if (configuration.type === NetworkClientType.Infura) {\n    rpcApiMiddleware = asV2Middleware(\n      createInfuraMiddleware({\n        rpcService: rpcServiceChain,\n        options: {\n          source: 'metamask',\n        },\n      }),\n    );\n  } else {\n    rpcApiMiddleware = createFetchMiddleware({ rpcService: rpcServiceChain });\n  }\n\n  const rpcProvider = providerFromMiddlewareV2(rpcApiMiddleware);\n\n  const blockTracker = createBlockTracker({\n    networkClientType: configuration.type,\n    endpointUrl: primaryEndpointUrl,\n    getOptions: getBlockTrackerOptions,\n    provider: rpcProvider,\n  });\n\n  const networkMiddleware =\n    configuration.type === NetworkClientType.Infura\n      ? createInfuraNetworkMiddleware({\n          blockTracker,\n          network: configuration.network,\n          rpcProvider,\n          rpcApiMiddleware,\n        })\n      : createCustomNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcApiMiddleware,\n        });\n\n  const provider: Provider = new InternalProvider({\n    engine: JsonRpcEngineV2.create({\n      middleware: [networkMiddleware],\n    }),\n  });\n\n  const destroy = (): void => {\n    // TODO: Either fix this lint violation or explain why it's necessary to ignore.\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    blockTracker.destroy();\n  };\n\n  return { configuration, provider, blockTracker, destroy };\n}\n\n/**\n * Determines the ordered list of endpoints that make up the RPC service chain\n * for a network, honoring the RPC failover flags.\n *\n * @param args - The arguments.\n * @param args.primaryEndpointUrl - The primary endpoint URL for the network.\n * @param args.failoverRpcUrls - The configured failover URLs, if any.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @returns The endpoints to use, each flagged as primary or failover.\n */\nfunction getAvailableEndpoints({\n  primaryEndpointUrl,\n  failoverRpcUrls,\n  rpcFailoverMode,\n}: {\n  primaryEndpointUrl: string;\n  failoverRpcUrls: string[] | undefined;\n  rpcFailoverMode: RpcFailoverMode;\n}): { url: string; isFailover: boolean }[] {\n  const failoverEndpoints = (failoverRpcUrls ?? []).map((url) => ({\n    url,\n    isFailover: true,\n  }));\n  // We explicitly check the URL since some networks have been added with invalid configuration types in the past.\n  const isInfura = new URL(primaryEndpointUrl).hostname.endsWith('.infura.io');\n\n  if (\n    rpcFailoverMode === 'forced' &&\n    isInfura &&\n    failoverEndpoints.length > 0\n  ) {\n    // Forced mode for an Infura endpoint with failovers: bypass Infura entirely\n    // and route all traffic (including block polling) to failovers. The first\n    // failover becomes the positional primary of the chain, so\n    // availability/degraded events will report that failover URL as the primary\n    // endpoint (there is no Infura primary in this mode).\n    return failoverEndpoints;\n  }\n  if (rpcFailoverMode === 'enabled' && isInfura) {\n    return [\n      { url: primaryEndpointUrl, isFailover: false },\n      ...failoverEndpoints,\n    ];\n  }\n  return [{ url: primaryEndpointUrl, isFailover: false }];\n}\n\n/**\n * Creates an RPC service chain, which represents the primary endpoint URL for\n * the network as well as its failover URLs.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.primaryEndpointUrl - The primary endpoint URL.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The RPC service chain.\n */\nfunction createRpcServiceChain({\n  id,\n  primaryEndpointUrl,\n  configuration,\n  getRpcServiceOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  primaryEndpointUrl: string;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): RpcServiceChain {\n  const availableEndpoints = getAvailableEndpoints({\n    primaryEndpointUrl,\n    failoverRpcUrls: configuration.failoverRpcUrls,\n    rpcFailoverMode,\n  });\n\n  const isOffline = (): boolean => {\n    const connectivityState = messenger.call('ConnectivityController:getState');\n    return (\n      connectivityState.connectivityStatus === CONNECTIVITY_STATUSES.Offline\n    );\n  };\n\n  // Ensure that if the endpoint continually responds with errors, we\n  // break the circuit relatively fast (but not prematurely).\n  //\n  // Note that the circuit will break much faster if the errors are\n  // retriable (e.g. 503) than if not (e.g. 500), so we attempt to strike\n  // a balance here.\n  const maxConsecutiveFailures = DEFAULT_MAX_CONSECUTIVE_FAILURES;\n\n  // The number of rounds of retries that will break the circuit,\n  // triggering a \"cooldown\".\n  //\n  // When we fail over to QuickNode, we expect it to be down at first\n  // while it is being automatically activated, and we don't want to\n  // activate the \"cooldown\" accidentally.\n  const maxConsecutiveFailuresFailover = (DEFAULT_MAX_RETRIES + 1) * 10;\n\n  const rpcServiceConfigurations = availableEndpoints.map((endpoint) => {\n    const overriddenOptions = getRpcServiceOptions?.(endpoint.url) ?? {};\n    return {\n      fetch: globalThis.fetch.bind(globalThis),\n      btoa: globalThis.btoa.bind(globalThis),\n      isOffline,\n      policyOptions: {\n        maxRetries: DEFAULT_MAX_RETRIES,\n        circuitBreakDuration: inMilliseconds(30, Duration.Second),\n        maxConsecutiveFailures: endpoint.isFailover\n          ? maxConsecutiveFailuresFailover\n          : maxConsecutiveFailures,\n        ...(overriddenOptions.policyOptions ?? {}),\n      },\n      ...overriddenOptions,\n      endpointUrl: endpoint.url,\n      logger,\n    };\n  });\n\n  /**\n   * Extracts the error from Cockatiel's `FailureReason` type received in\n   * circuit breaker event handlers.\n   *\n   * The `FailureReason` object can have two possible shapes:\n   * - `{ error: Error }` - When the RPC service throws an error (the common\n   * case for RPC failures).\n   * - `{ value: T }` - When the RPC service returns a value that the retry\n   * filter policy considers a failure.\n   *\n   * @param value - The event data object from the circuit breaker event\n   * listener (after destructuring known properties like `endpointUrl`). This\n   * represents Cockatiel's `FailureReason` type.\n   * @returns The error or failure value, or `undefined` if neither property\n   * exists (which shouldn't happen in practice unless the circuit breaker is\n   * manually isolated).\n   */\n  const getError = (\n    value: CockatielFailureReason<unknown> | Record<never, never>,\n  ): Error | unknown | undefined => {\n    if ('error' in value) {\n      return value.error;\n    } else if ('value' in value) {\n      return value.value;\n    }\n    return undefined;\n  };\n\n  const rpcServiceChain = new RpcServiceChain([\n    rpcServiceConfigurations[0],\n    ...rpcServiceConfigurations.slice(1),\n  ]);\n\n  rpcServiceChain.onBreak((data) => {\n    const error = getError(data);\n\n    if (error === undefined) {\n      // This error shouldn't happen in practice because we never call `.isolate`\n      // on the circuit breaker policy, but we need to appease TypeScript.\n      throw new Error('Could not make request to endpoint.');\n    }\n\n    messenger.publish('NetworkController:rpcEndpointChainUnavailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n      error,\n    });\n  });\n\n  rpcServiceChain.onServiceBreak(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      ...rest\n    }) => {\n      const error = getError(rest);\n\n      if (error === undefined) {\n        // This error shouldn't happen in practice because we never call `.isolate`\n        // on the circuit breaker policy, but we need to appease TypeScript.\n        throw new Error('Could not make request to endpoint.');\n      }\n\n      messenger.publish('NetworkController:rpcEndpointUnavailable', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n      });\n    },\n  );\n\n  rpcServiceChain.onDegraded(\n    ({ rpcMethodName, duration, traceId, ...rest }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n      messenger.publish('NetworkController:rpcEndpointChainDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onServiceDegraded(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      rpcMethodName,\n      duration,\n      traceId,\n      ...rest\n    }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n\n      messenger.publish('NetworkController:rpcEndpointDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onAvailable(() => {\n    messenger.publish('NetworkController:rpcEndpointChainAvailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n    });\n  });\n\n  rpcServiceChain.onServiceRetry(\n    ({\n      attempt,\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n    }) => {\n      messenger.publish('NetworkController:rpcEndpointRetried', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        attempt,\n      });\n    },\n  );\n\n  return rpcServiceChain;\n}\n\n/**\n * Create the block tracker for the network.\n *\n * @param args - The arguments.\n * @param args.networkClientType - The type of the network client (\"infura\" or\n * \"custom\").\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.getOptions - Factory for the block tracker options.\n * @param args.provider - The EIP-1193 provider for the network's JSON-RPC\n * middleware stack.\n * @returns The created block tracker.\n */\nfunction createBlockTracker({\n  networkClientType,\n  endpointUrl,\n  getOptions,\n  provider,\n}: {\n  networkClientType: NetworkClientType;\n  endpointUrl: string;\n  getOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  provider: InternalProvider;\n}): PollingBlockTracker {\n  const defaultOptions = {\n    pollingInterval:\n      // Needed for testing.\n      // eslint-disable-next-line no-restricted-globals\n      process.env.IN_TEST && networkClientType === NetworkClientType.Custom\n        ? inMilliseconds(1, Duration.Second)\n        : inMilliseconds(20, Duration.Second),\n    retryTimeout: inMilliseconds(20, Duration.Second),\n  };\n\n  return new PollingBlockTracker({\n    ...defaultOptions,\n    ...getOptions(endpointUrl),\n    provider,\n  });\n}\n\n/**\n * Create middleware for infura.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.network - The Infura network to use.\n * @param args.rpcProvider - The RPC provider to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createInfuraNetworkMiddleware({\n  blockTracker,\n  network,\n  rpcProvider,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  network: InfuraNetworkType;\n  rpcProvider: InternalProvider;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  return JsonRpcEngineV2.create({\n    middleware: [\n      createNetworkAndChainIdMiddleware({ network }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockRefMiddleware({ blockTracker, provider: rpcProvider }),\n      createRetryOnEmptyMiddleware({ blockTracker, provider: rpcProvider }),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * Creates static method middleware.\n *\n * @param args - The Arguments.\n * @param args.network - The Infura network to use.\n * @returns The middleware that implements the eth_chainId method.\n */\nfunction createNetworkAndChainIdMiddleware({\n  network,\n}: {\n  network: InfuraNetworkType;\n}): JsonRpcMiddleware<JsonRpcRequest> {\n  return createScaffoldMiddleware({\n    eth_chainId: ChainId[network],\n  });\n}\n\nconst createChainIdMiddleware = (\n  chainId: Hex,\n): JsonRpcMiddleware<JsonRpcRequest, Json> => {\n  return ({ request, next }) => {\n    if (request.method === 'eth_chainId') {\n      return chainId;\n    }\n    return next();\n  };\n};\n\n/**\n * Creates custom middleware.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createCustomNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: Hex;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  // Needed for testing.\n  // eslint-disable-next-line no-restricted-globals\n  const testMiddlewares = process.env.IN_TEST\n    ? [createEstimateGasDelayTestMiddleware()]\n    : [];\n\n  return JsonRpcEngineV2.create({\n    middleware: [\n      ...testMiddlewares,\n      createChainIdMiddleware(chainId),\n      createBlockRefRewriteMiddleware({ blockTracker }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * For use in tests only.\n * Adds a delay to `eth_estimateGas` calls.\n *\n * @returns The middleware for delaying gas estimation calls by 2 seconds when in test.\n */\nfunction createEstimateGasDelayTestMiddleware(): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json\n> {\n  return async ({ request, next }) => {\n    if (request.method === 'eth_estimateGas') {\n      await new Promise((resolve) => setTimeout(resolve, SECOND * 2));\n    }\n    return next();\n  };\n}\n"]}
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{ CONNECTIVITY_STATUSES } from '@metamask/connectivity-controller';\nimport type { CockatielFailureReason } from '@metamask/controller-utils';\nimport {\n  DEFAULT_MAX_CONSECUTIVE_FAILURES,\n  DEFAULT_MAX_RETRIES,\n} from '@metamask/controller-utils';\nimport type { PollingBlockTrackerOptions } from '@metamask/eth-block-tracker';\nimport { PollingBlockTracker } from '@metamask/eth-block-tracker';\nimport { createInfuraMiddleware } from '@metamask/eth-json-rpc-infura';\nimport {\n  createBlockCacheMiddleware,\n  createBlockRefMiddleware,\n  createBlockRefRewriteMiddleware,\n  createBlockTrackerInspectorMiddleware,\n  createInflightCacheMiddleware,\n  createFetchMiddleware,\n  createRetryOnEmptyMiddleware,\n} from '@metamask/eth-json-rpc-middleware';\nimport { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport { providerFromMiddlewareV2 } from '@metamask/eth-json-rpc-provider';\nimport { asV2Middleware } from '@metamask/json-rpc-engine';\nimport {\n  createScaffoldMiddleware,\n  JsonRpcEngineV2,\n} from '@metamask/json-rpc-engine/v2';\nimport type {\n  JsonRpcMiddleware,\n  MiddlewareContext,\n} from '@metamask/json-rpc-engine/v2';\nimport { inMilliseconds, Duration } from '@metamask/utils';\nimport type { Hex, Json, JsonRpcRequest } from '@metamask/utils';\nimport type { Logger } from 'loglevel';\n\nimport type {\n  NetworkClientId,\n  NetworkControllerMessenger,\n} from './NetworkController.js';\nimport { RpcServiceChain } from './rpc-service/rpc-service-chain.js';\nimport type { RpcServiceOptionsWithDefaults } from './rpc-service/rpc-service.js';\nimport {\n  isConnectionError,\n  isConnectionResetError,\n  isJsonParseError,\n  isHttpServerError,\n  isTimeoutError,\n} from './rpc-service/rpc-service.js';\nimport type { RpcFailoverMode } from './selectors.js';\nimport type {\n  BlockTracker,\n  NetworkClientConfiguration,\n  Provider,\n} from './types.js';\nimport { NetworkClientType } from './types.js';\n\nconst SECOND = 1000;\n\n/**\n * Why the degraded event was emitted.\n */\nexport type DegradedEventType = 'slow_success' | 'retries_exhausted';\n\n/**\n * The category of error that was retried until retries were exhausted.\n */\nexport type RetryReason =\n  | 'connection_failed'\n  | 'response_not_json'\n  | 'non_successful_http_status'\n  | 'timed_out'\n  | 'connection_reset'\n  | 'unknown';\n\n/**\n * Classifies the error that was being retried when retries were exhausted.\n *\n * @param error - The error from the last retry attempt.\n * @returns A classification string.\n */\nexport function classifyRetryReason(error: unknown): RetryReason {\n  if (!(error instanceof Error)) {\n    return 'unknown';\n  }\n  if (isConnectionError(error)) {\n    return 'connection_failed';\n  }\n  if (isJsonParseError(error)) {\n    return 'response_not_json';\n  }\n  if (isHttpServerError(error)) {\n    return 'non_successful_http_status';\n  }\n  if (isTimeoutError(error)) {\n    return 'timed_out';\n  }\n  if (isConnectionResetError(error)) {\n    return 'connection_reset';\n  }\n  return 'unknown';\n}\n\n/**\n * The pair of provider / block tracker that can be used to interface with the\n * network and respond to new activity.\n */\nexport type NetworkClient = {\n  configuration: NetworkClientConfiguration;\n  provider: Provider;\n  blockTracker: BlockTracker;\n  destroy: () => void;\n};\n\ntype RpcApiMiddleware = JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string }>\n>;\n\n/**\n * Create a JSON RPC network client for a specific network.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.getBlockTrackerOptions - Factory for constructing block tracker\n * options. See {@link NetworkControllerOptions.getBlockTrackerOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The network client.\n */\nexport function createNetworkClient({\n  id,\n  configuration,\n  getRpcServiceOptions,\n  getBlockTrackerOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  getBlockTrackerOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): NetworkClient {\n  const primaryEndpointUrl =\n    configuration.type === NetworkClientType.Infura\n      ? `https://${configuration.network}.infura.io/v3/${configuration.infuraProjectId}`\n      : configuration.rpcUrl;\n  const rpcServiceChain = createRpcServiceChain({\n    id,\n    primaryEndpointUrl,\n    configuration,\n    getRpcServiceOptions,\n    messenger,\n    rpcFailoverMode,\n    logger,\n  });\n\n  let rpcApiMiddleware: RpcApiMiddleware;\n  if (configuration.type === NetworkClientType.Infura) {\n    rpcApiMiddleware = asV2Middleware(\n      createInfuraMiddleware({\n        rpcService: rpcServiceChain,\n        options: {\n          source: 'metamask',\n        },\n      }),\n    );\n  } else {\n    rpcApiMiddleware = createFetchMiddleware({ rpcService: rpcServiceChain });\n  }\n\n  const rpcProvider = providerFromMiddlewareV2(rpcApiMiddleware);\n\n  const blockTracker = createBlockTracker({\n    networkClientType: configuration.type,\n    endpointUrl: primaryEndpointUrl,\n    getOptions: getBlockTrackerOptions,\n    provider: rpcProvider,\n  });\n\n  const networkMiddleware =\n    configuration.type === NetworkClientType.Infura\n      ? createInfuraNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcProvider,\n          rpcApiMiddleware,\n        })\n      : createCustomNetworkMiddleware({\n          blockTracker,\n          chainId: configuration.chainId,\n          rpcApiMiddleware,\n        });\n\n  const provider: Provider = new InternalProvider({\n    engine: JsonRpcEngineV2.create({\n      middleware: [networkMiddleware],\n    }),\n  });\n\n  const destroy = (): void => {\n    // TODO: Either fix this lint violation or explain why it's necessary to ignore.\n    // eslint-disable-next-line @typescript-eslint/no-floating-promises\n    blockTracker.destroy();\n  };\n\n  return { configuration, provider, blockTracker, destroy };\n}\n\n/**\n * Determines the ordered list of endpoints that make up the RPC service chain\n * for a network, honoring the RPC failover flags.\n *\n * @param args - The arguments.\n * @param args.primaryEndpointUrl - The primary endpoint URL for the network.\n * @param args.failoverRpcUrls - The configured failover URLs, if any.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`,\n * `enabled` (divert to the failover URLs when the primary is unavailable), or\n * `forced` (route all traffic for Infura endpoints with failover URLs to those\n * URLs, bypassing Infura).\n * @returns The endpoints to use, each flagged as primary or failover.\n */\nfunction getAvailableEndpoints({\n  primaryEndpointUrl,\n  failoverRpcUrls,\n  rpcFailoverMode,\n}: {\n  primaryEndpointUrl: string;\n  failoverRpcUrls: string[] | undefined;\n  rpcFailoverMode: RpcFailoverMode;\n}): { url: string; isFailover: boolean }[] {\n  const failoverEndpoints = (failoverRpcUrls ?? []).map((url) => ({\n    url,\n    isFailover: true,\n  }));\n  // We explicitly check the URL since some networks have been added with invalid configuration types in the past.\n  const isInfura = new URL(primaryEndpointUrl).hostname.endsWith('.infura.io');\n\n  if (\n    rpcFailoverMode === 'forced' &&\n    isInfura &&\n    failoverEndpoints.length > 0\n  ) {\n    // Forced mode for an Infura endpoint with failovers: bypass Infura entirely\n    // and route all traffic (including block polling) to failovers. The first\n    // failover becomes the positional primary of the chain, so\n    // availability/degraded events will report that failover URL as the primary\n    // endpoint (there is no Infura primary in this mode).\n    return failoverEndpoints;\n  }\n  if (rpcFailoverMode === 'enabled' && isInfura) {\n    return [\n      { url: primaryEndpointUrl, isFailover: false },\n      ...failoverEndpoints,\n    ];\n  }\n  return [{ url: primaryEndpointUrl, isFailover: false }];\n}\n\n/**\n * Creates an RPC service chain, which represents the primary endpoint URL for\n * the network as well as its failover URLs.\n *\n * @param args - The arguments.\n * @param args.id - The ID that will be assigned to the new network client in\n * the registry.\n * @param args.primaryEndpointUrl - The primary endpoint URL.\n * @param args.configuration - The network configuration.\n * @param args.getRpcServiceOptions - Factory for constructing RPC service\n * options. See {@link NetworkControllerOptions.getRpcServiceOptions}.\n * @param args.messenger - The network controller messenger.\n * @param args.rpcFailoverMode - The RPC failover mode to apply: `disabled`\n * (failover off), `enabled` (divert to the configured failover URLs when the\n * primary endpoint is unavailable), or `forced` (Infura endpoints that have\n * failover URLs route all traffic to those URLs, bypassing Infura entirely).\n * @param args.logger - A `loglevel` logger.\n * @returns The RPC service chain.\n */\nfunction createRpcServiceChain({\n  id,\n  primaryEndpointUrl,\n  configuration,\n  getRpcServiceOptions,\n  messenger,\n  rpcFailoverMode,\n  logger,\n}: {\n  id: NetworkClientId;\n  primaryEndpointUrl: string;\n  configuration: NetworkClientConfiguration;\n  getRpcServiceOptions?: (\n    rpcEndpointUrl: string,\n  ) => RpcServiceOptionsWithDefaults;\n  messenger: NetworkControllerMessenger;\n  rpcFailoverMode: RpcFailoverMode;\n  logger?: Logger;\n}): RpcServiceChain {\n  const availableEndpoints = getAvailableEndpoints({\n    primaryEndpointUrl,\n    failoverRpcUrls: configuration.failoverRpcUrls,\n    rpcFailoverMode,\n  });\n\n  const isOffline = (): boolean => {\n    const connectivityState = messenger.call('ConnectivityController:getState');\n    return (\n      connectivityState.connectivityStatus === CONNECTIVITY_STATUSES.Offline\n    );\n  };\n\n  // Ensure that if the endpoint continually responds with errors, we\n  // break the circuit relatively fast (but not prematurely).\n  //\n  // Note that the circuit will break much faster if the errors are\n  // retriable (e.g. 503) than if not (e.g. 500), so we attempt to strike\n  // a balance here.\n  const maxConsecutiveFailures = DEFAULT_MAX_CONSECUTIVE_FAILURES;\n\n  // The number of rounds of retries that will break the circuit,\n  // triggering a \"cooldown\".\n  //\n  // When we fail over to QuickNode, we expect it to be down at first\n  // while it is being automatically activated, and we don't want to\n  // activate the \"cooldown\" accidentally.\n  const maxConsecutiveFailuresFailover = (DEFAULT_MAX_RETRIES + 1) * 10;\n\n  const rpcServiceConfigurations = availableEndpoints.map((endpoint) => {\n    const overriddenOptions = getRpcServiceOptions?.(endpoint.url) ?? {};\n    return {\n      fetch: globalThis.fetch.bind(globalThis),\n      btoa: globalThis.btoa.bind(globalThis),\n      isOffline,\n      policyOptions: {\n        maxRetries: DEFAULT_MAX_RETRIES,\n        circuitBreakDuration: inMilliseconds(30, Duration.Second),\n        maxConsecutiveFailures: endpoint.isFailover\n          ? maxConsecutiveFailuresFailover\n          : maxConsecutiveFailures,\n        ...(overriddenOptions.policyOptions ?? {}),\n      },\n      ...overriddenOptions,\n      endpointUrl: endpoint.url,\n      logger,\n    };\n  });\n\n  /**\n   * Extracts the error from Cockatiel's `FailureReason` type received in\n   * circuit breaker event handlers.\n   *\n   * The `FailureReason` object can have two possible shapes:\n   * - `{ error: Error }` - When the RPC service throws an error (the common\n   * case for RPC failures).\n   * - `{ value: T }` - When the RPC service returns a value that the retry\n   * filter policy considers a failure.\n   *\n   * @param value - The event data object from the circuit breaker event\n   * listener (after destructuring known properties like `endpointUrl`). This\n   * represents Cockatiel's `FailureReason` type.\n   * @returns The error or failure value, or `undefined` if neither property\n   * exists (which shouldn't happen in practice unless the circuit breaker is\n   * manually isolated).\n   */\n  const getError = (\n    value: CockatielFailureReason<unknown> | Record<never, never>,\n  ): Error | unknown | undefined => {\n    if ('error' in value) {\n      return value.error;\n    } else if ('value' in value) {\n      return value.value;\n    }\n    return undefined;\n  };\n\n  const rpcServiceChain = new RpcServiceChain([\n    rpcServiceConfigurations[0],\n    ...rpcServiceConfigurations.slice(1),\n  ]);\n\n  rpcServiceChain.onBreak((data) => {\n    const error = getError(data);\n\n    if (error === undefined) {\n      // This error shouldn't happen in practice because we never call `.isolate`\n      // on the circuit breaker policy, but we need to appease TypeScript.\n      throw new Error('Could not make request to endpoint.');\n    }\n\n    messenger.publish('NetworkController:rpcEndpointChainUnavailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n      error,\n    });\n  });\n\n  rpcServiceChain.onServiceBreak(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      ...rest\n    }) => {\n      const error = getError(rest);\n\n      if (error === undefined) {\n        // This error shouldn't happen in practice because we never call `.isolate`\n        // on the circuit breaker policy, but we need to appease TypeScript.\n        throw new Error('Could not make request to endpoint.');\n      }\n\n      messenger.publish('NetworkController:rpcEndpointUnavailable', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n      });\n    },\n  );\n\n  rpcServiceChain.onDegraded(\n    ({ rpcMethodName, duration, traceId, ...rest }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n      messenger.publish('NetworkController:rpcEndpointChainDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onServiceDegraded(\n    ({\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n      rpcMethodName,\n      duration,\n      traceId,\n      ...rest\n    }) => {\n      const error = getError(rest);\n      const type: DegradedEventType =\n        error === undefined ? 'slow_success' : 'retries_exhausted';\n\n      messenger.publish('NetworkController:rpcEndpointDegraded', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        error,\n        rpcMethodName,\n        duration,\n        traceId,\n        type,\n        retryReason:\n          error === undefined ? undefined : classifyRetryReason(error),\n      });\n    },\n  );\n\n  rpcServiceChain.onAvailable(() => {\n    messenger.publish('NetworkController:rpcEndpointChainAvailable', {\n      chainId: configuration.chainId,\n      networkClientId: id,\n    });\n  });\n\n  rpcServiceChain.onServiceRetry(\n    ({\n      attempt,\n      endpointUrl,\n      primaryEndpointUrl: primaryEndpointUrlFromEvent,\n    }) => {\n      messenger.publish('NetworkController:rpcEndpointRetried', {\n        chainId: configuration.chainId,\n        networkClientId: id,\n        primaryEndpointUrl: primaryEndpointUrlFromEvent,\n        endpointUrl,\n        attempt,\n      });\n    },\n  );\n\n  return rpcServiceChain;\n}\n\n/**\n * Create the block tracker for the network.\n *\n * @param args - The arguments.\n * @param args.networkClientType - The type of the network client (\"infura\" or\n * \"custom\").\n * @param args.endpointUrl - The URL of the endpoint.\n * @param args.getOptions - Factory for the block tracker options.\n * @param args.provider - The EIP-1193 provider for the network's JSON-RPC\n * middleware stack.\n * @returns The created block tracker.\n */\nfunction createBlockTracker({\n  networkClientType,\n  endpointUrl,\n  getOptions,\n  provider,\n}: {\n  networkClientType: NetworkClientType;\n  endpointUrl: string;\n  getOptions: (\n    rpcEndpointUrl: string,\n  ) => Omit<PollingBlockTrackerOptions, 'provider'>;\n  provider: InternalProvider;\n}): PollingBlockTracker {\n  const defaultOptions = {\n    pollingInterval:\n      // Needed for testing.\n      // eslint-disable-next-line no-restricted-globals\n      process.env.IN_TEST && networkClientType === NetworkClientType.Custom\n        ? inMilliseconds(1, Duration.Second)\n        : inMilliseconds(20, Duration.Second),\n    retryTimeout: inMilliseconds(20, Duration.Second),\n  };\n\n  return new PollingBlockTracker({\n    ...defaultOptions,\n    ...getOptions(endpointUrl),\n    provider,\n  });\n}\n\n/**\n * Create middleware for infura.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcProvider - The RPC provider to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createInfuraNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcProvider,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: string;\n  rpcProvider: InternalProvider;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  return JsonRpcEngineV2.create({\n    middleware: [\n      createNetworkAndChainIdMiddleware({ chainId }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockRefMiddleware({ blockTracker, provider: rpcProvider }),\n      createRetryOnEmptyMiddleware({ blockTracker, provider: rpcProvider }),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * Creates static method middleware.\n *\n * @param args - The Arguments.\n * @param args.chainId - The chain id to use.\n * @returns The middleware that implements the eth_chainId method.\n */\nfunction createNetworkAndChainIdMiddleware({\n  chainId,\n}: {\n  chainId: string;\n}): JsonRpcMiddleware<JsonRpcRequest> {\n  return createScaffoldMiddleware({\n    eth_chainId: chainId,\n  });\n}\n\nconst createChainIdMiddleware = (\n  chainId: Hex,\n): JsonRpcMiddleware<JsonRpcRequest, Json> => {\n  return ({ request, next }) => {\n    if (request.method === 'eth_chainId') {\n      return chainId;\n    }\n    return next();\n  };\n};\n\n/**\n * Creates custom middleware.\n *\n * @param args - The arguments.\n * @param args.blockTracker - The block tracker to use.\n * @param args.chainId - The chain id to use.\n * @param args.rpcApiMiddleware - Additional middleware.\n * @returns The collection of middleware that makes up the Infura client.\n */\nfunction createCustomNetworkMiddleware({\n  blockTracker,\n  chainId,\n  rpcApiMiddleware,\n}: {\n  blockTracker: PollingBlockTracker;\n  chainId: Hex;\n  rpcApiMiddleware: RpcApiMiddleware;\n}): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json,\n  MiddlewareContext<{ origin: string; skipCache: boolean }>\n> {\n  // Needed for testing.\n  // eslint-disable-next-line no-restricted-globals\n  const testMiddlewares = process.env.IN_TEST\n    ? [createEstimateGasDelayTestMiddleware()]\n    : [];\n\n  return JsonRpcEngineV2.create({\n    middleware: [\n      ...testMiddlewares,\n      createChainIdMiddleware(chainId),\n      createBlockRefRewriteMiddleware({ blockTracker }),\n      createBlockCacheMiddleware({ blockTracker }),\n      createInflightCacheMiddleware(),\n      createBlockTrackerInspectorMiddleware({ blockTracker }),\n      rpcApiMiddleware,\n    ],\n  }).asMiddleware();\n}\n\n/**\n * For use in tests only.\n * Adds a delay to `eth_estimateGas` calls.\n *\n * @returns The middleware for delaying gas estimation calls by 2 seconds when in test.\n */\nfunction createEstimateGasDelayTestMiddleware(): JsonRpcMiddleware<\n  JsonRpcRequest,\n  Json\n> {\n  return async ({ request, next }) => {\n    if (request.method === 'eth_estimateGas') {\n      await new Promise((resolve) => setTimeout(resolve, SECOND * 2));\n    }\n    return next();\n  };\n}\n"]}

dist/index.cjs

@@ -18,15 +18,15 @@ "use strict";
 exports.isConnectionError = exports.classifyRetryReason = exports.NetworkClientType = exports.RpcEndpointType = exports.NetworkController = exports.knownKeysOf = exports.selectAvailableNetworkClientIds = exports.getDefaultNetworkControllerState = void 0;
-var NetworkController_1 = require("./NetworkController.cjs");
-Object.defineProperty(exports, "getDefaultNetworkControllerState", { enumerable: true, get: function () { return NetworkController_1.getDefaultNetworkControllerState; } });
-Object.defineProperty(exports, "selectAvailableNetworkClientIds", { enumerable: true, get: function () { return NetworkController_1.selectAvailableNetworkClientIds; } });
-Object.defineProperty(exports, "knownKeysOf", { enumerable: true, get: function () { return NetworkController_1.knownKeysOf; } });
-Object.defineProperty(exports, "NetworkController", { enumerable: true, get: function () { return NetworkController_1.NetworkController; } });
-Object.defineProperty(exports, "RpcEndpointType", { enumerable: true, get: function () { return NetworkController_1.RpcEndpointType; } });
+var NetworkController_js_1 = require("./NetworkController.cjs");
+Object.defineProperty(exports, "getDefaultNetworkControllerState", { enumerable: true, get: function () { return NetworkController_js_1.getDefaultNetworkControllerState; } });
+Object.defineProperty(exports, "selectAvailableNetworkClientIds", { enumerable: true, get: function () { return NetworkController_js_1.selectAvailableNetworkClientIds; } });
+Object.defineProperty(exports, "knownKeysOf", { enumerable: true, get: function () { return NetworkController_js_1.knownKeysOf; } });
+Object.defineProperty(exports, "NetworkController", { enumerable: true, get: function () { return NetworkController_js_1.NetworkController; } });
+Object.defineProperty(exports, "RpcEndpointType", { enumerable: true, get: function () { return NetworkController_js_1.RpcEndpointType; } });
 __exportStar(require("./constants.cjs"), exports);
-var types_1 = require("./types.cjs");
-Object.defineProperty(exports, "NetworkClientType", { enumerable: true, get: function () { return types_1.NetworkClientType; } });
-var create_network_client_1 = require("./create-network-client.cjs");
-Object.defineProperty(exports, "classifyRetryReason", { enumerable: true, get: function () { return create_network_client_1.classifyRetryReason; } });
-var rpc_service_1 = require("./rpc-service/rpc-service.cjs");
-Object.defineProperty(exports, "isConnectionError", { enumerable: true, get: function () { return rpc_service_1.isConnectionError; } });
+var types_js_1 = require("./types.cjs");
+Object.defineProperty(exports, "NetworkClientType", { enumerable: true, get: function () { return types_js_1.NetworkClientType; } });
+var create_network_client_js_1 = require("./create-network-client.cjs");
+Object.defineProperty(exports, "classifyRetryReason", { enumerable: true, get: function () { return create_network_client_js_1.classifyRetryReason; } });
+var rpc_service_js_1 = require("./rpc-service/rpc-service.cjs");
+Object.defineProperty(exports, "isConnectionError", { enumerable: true, get: function () { return rpc_service_js_1.isConnectionError; } });
 //# sourceMappingURL=index.cjs.map

dist/index.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.cjs","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;AAmCA,6DAM6B;AAL3B,qIAAA,gCAAgC,OAAA;AAChC,oIAAA,+BAA+B,OAAA;AAC/B,gHAAA,WAAW,OAAA;AACX,sHAAA,iBAAiB,OAAA;AACjB,oHAAA,eAAe,OAAA;AAEjB,kDAA4B;AAO5B,qCAA4C;AAAnC,0GAAA,iBAAiB,OAAA;AAK1B,qEAA8D;AAArD,4HAAA,mBAAmB,OAAA;AAC5B,6DAA8D;AAArD,gHAAA,iBAAiB,OAAA","sourcesContent":["export type { AutoManagedNetworkClient } from './create-auto-managed-network-client';\nexport type {\n  Block,\n  NetworkMetadata,\n  NetworkConfiguration,\n  BuiltInNetworkClientId,\n  CustomNetworkClientId,\n  NetworkClientId,\n  NetworksMetadata,\n  NetworkState,\n  BlockTrackerProxy,\n  ProviderProxy,\n  AddNetworkCustomRpcEndpointFields,\n  AddNetworkFields,\n  UpdateNetworkFields,\n  InfuraRpcEndpoint,\n  NetworkControllerStateChangeEvent,\n  NetworkControllerNetworkWillChangeEvent,\n  NetworkControllerNetworkDidChangeEvent,\n  NetworkControllerInfuraIsBlockedEvent,\n  NetworkControllerInfuraIsUnblockedEvent,\n  NetworkControllerNetworkAddedEvent,\n  NetworkControllerNetworkRemovedEvent,\n  NetworkControllerEvents,\n  NetworkControllerGetStateAction,\n  NetworkControllerActions,\n  NetworkControllerMessenger,\n  NetworkControllerOptions,\n  NetworkControllerRpcEndpointChainUnavailableEvent,\n  NetworkControllerRpcEndpointUnavailableEvent,\n  NetworkControllerRpcEndpointChainDegradedEvent,\n  NetworkControllerRpcEndpointDegradedEvent,\n  NetworkControllerRpcEndpointChainAvailableEvent,\n  NetworkControllerRpcEndpointRetriedEvent,\n} from './NetworkController';\nexport {\n  getDefaultNetworkControllerState,\n  selectAvailableNetworkClientIds,\n  knownKeysOf,\n  NetworkController,\n  RpcEndpointType,\n} from './NetworkController';\nexport * from './constants';\nexport type { BlockTracker, Provider } from './types';\nexport type {\n  NetworkClientConfiguration,\n  InfuraNetworkClientConfiguration,\n  CustomNetworkClientConfiguration,\n} from './types';\nexport { NetworkClientType } from './types';\nexport type { NetworkClient } from './create-network-client';\nexport type { AbstractRpcService } from './rpc-service/abstract-rpc-service';\nexport type { RpcServiceRequestable } from './rpc-service/rpc-service-requestable';\nexport type { DegradedEventType, RetryReason } from './create-network-client';\nexport { classifyRetryReason } from './create-network-client';\nexport { isConnectionError } from './rpc-service/rpc-service';\nexport type {\n  NetworkControllerGetEthQueryAction,\n  NetworkControllerGetNetworkClientByIdAction,\n  NetworkControllerGetSelectedNetworkClientAction,\n  NetworkControllerGetSelectedChainIdAction,\n  NetworkControllerGetEIP1559CompatibilityAction,\n  NetworkControllerFindNetworkClientIdByChainIdAction,\n  NetworkControllerSetProviderTypeAction,\n  NetworkControllerSetActiveNetworkAction,\n  NetworkControllerGetNetworkConfigurationByChainIdAction,\n  NetworkControllerGetNetworkConfigurationByNetworkClientIdAction,\n  NetworkControllerAddNetworkAction,\n  NetworkControllerRemoveNetworkAction,\n  NetworkControllerUpdateNetworkAction,\n  NetworkControllerGetProviderAndBlockTrackerAction,\n  NetworkControllerGetNetworkClientRegistryAction,\n  NetworkControllerLookupNetworkAction,\n  NetworkControllerLookupNetworkByClientIdAction,\n  NetworkControllerGet1559CompatibilityWithNetworkClientIdAction,\n  NetworkControllerResetConnectionAction,\n  NetworkControllerRollbackToPreviousProviderAction,\n  NetworkControllerLoadBackupAction,\n} from './NetworkController-method-action-types';\n"]}
+{"version":3,"file":"index.cjs","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":";;;;;;;;;;;;;;;;;AAmCA,gEAMgC;AAL9B,wIAAA,gCAAgC,OAAA;AAChC,uIAAA,+BAA+B,OAAA;AAC/B,mHAAA,WAAW,OAAA;AACX,yHAAA,iBAAiB,OAAA;AACjB,uHAAA,eAAe,OAAA;AAEjB,kDAA+B;AAO/B,wCAA+C;AAAtC,6GAAA,iBAAiB,OAAA;AAQ1B,wEAAiE;AAAxD,+HAAA,mBAAmB,OAAA;AAK5B,gEAAiE;AAAxD,mHAAA,iBAAiB,OAAA","sourcesContent":["export type { AutoManagedNetworkClient } from './create-auto-managed-network-client.js';\nexport type {\n  Block,\n  NetworkMetadata,\n  NetworkConfiguration,\n  BuiltInNetworkClientId,\n  CustomNetworkClientId,\n  NetworkClientId,\n  NetworksMetadata,\n  NetworkState,\n  BlockTrackerProxy,\n  ProviderProxy,\n  AddNetworkCustomRpcEndpointFields,\n  AddNetworkFields,\n  UpdateNetworkFields,\n  InfuraRpcEndpoint,\n  NetworkControllerStateChangeEvent,\n  NetworkControllerNetworkWillChangeEvent,\n  NetworkControllerNetworkDidChangeEvent,\n  NetworkControllerInfuraIsBlockedEvent,\n  NetworkControllerInfuraIsUnblockedEvent,\n  NetworkControllerNetworkAddedEvent,\n  NetworkControllerNetworkRemovedEvent,\n  NetworkControllerEvents,\n  NetworkControllerGetStateAction,\n  NetworkControllerActions,\n  NetworkControllerMessenger,\n  NetworkControllerOptions,\n  NetworkControllerRpcEndpointChainUnavailableEvent,\n  NetworkControllerRpcEndpointUnavailableEvent,\n  NetworkControllerRpcEndpointChainDegradedEvent,\n  NetworkControllerRpcEndpointDegradedEvent,\n  NetworkControllerRpcEndpointChainAvailableEvent,\n  NetworkControllerRpcEndpointRetriedEvent,\n} from './NetworkController.js';\nexport {\n  getDefaultNetworkControllerState,\n  selectAvailableNetworkClientIds,\n  knownKeysOf,\n  NetworkController,\n  RpcEndpointType,\n} from './NetworkController.js';\nexport * from './constants.js';\nexport type { BlockTracker, Provider } from './types.js';\nexport type {\n  NetworkClientConfiguration,\n  InfuraNetworkClientConfiguration,\n  CustomNetworkClientConfiguration,\n} from './types.js';\nexport { NetworkClientType } from './types.js';\nexport type { NetworkClient } from './create-network-client.js';\nexport type { AbstractRpcService } from './rpc-service/abstract-rpc-service.js';\nexport type { RpcServiceRequestable } from './rpc-service/rpc-service-requestable.js';\nexport type {\n  DegradedEventType,\n  RetryReason,\n} from './create-network-client.js';\nexport { classifyRetryReason } from './create-network-client.js';\nexport type {\n  NetworkControllerAnalyticsOptions,\n  RpcServiceEventName,\n} from './rpc-service-analytics.js';\nexport { isConnectionError } from './rpc-service/rpc-service.js';\nexport type {\n  NetworkControllerGetEthQueryAction,\n  NetworkControllerGetNetworkClientByIdAction,\n  NetworkControllerGetSelectedNetworkClientAction,\n  NetworkControllerGetSelectedChainIdAction,\n  NetworkControllerGetEIP1559CompatibilityAction,\n  NetworkControllerFindNetworkClientIdByChainIdAction,\n  NetworkControllerSetProviderTypeAction,\n  NetworkControllerSetActiveNetworkAction,\n  NetworkControllerGetNetworkConfigurationByChainIdAction,\n  NetworkControllerGetNetworkConfigurationByNetworkClientIdAction,\n  NetworkControllerAddNetworkAction,\n  NetworkControllerRemoveNetworkAction,\n  NetworkControllerUpdateNetworkAction,\n  NetworkControllerGetProviderAndBlockTrackerAction,\n  NetworkControllerGetNetworkClientRegistryAction,\n  NetworkControllerLookupNetworkAction,\n  NetworkControllerLookupNetworkByClientIdAction,\n  NetworkControllerGet1559CompatibilityWithNetworkClientIdAction,\n  NetworkControllerResetConnectionAction,\n  NetworkControllerRollbackToPreviousProviderAction,\n  NetworkControllerLoadBackupAction,\n} from './NetworkController-method-action-types.js';\n"]}

dist/index.d.cts

@@ -11,6 +11,7 @@ export type { AutoManagedNetworkClient } from "./create-auto-managed-network-client.cjs";
 export type { RpcServiceRequestable } from "./rpc-service/rpc-service-requestable.cjs";
-export type { DegradedEventType, RetryReason } from "./create-network-client.cjs";
+export type { DegradedEventType, RetryReason, } from "./create-network-client.cjs";
 export { classifyRetryReason } from "./create-network-client.cjs";
+export type { NetworkControllerAnalyticsOptions, RpcServiceEventName, } from "./rpc-service-analytics.cjs";
 export { isConnectionError } from "./rpc-service/rpc-service.cjs";
 export type { NetworkControllerGetEthQueryAction, NetworkControllerGetNetworkClientByIdAction, NetworkControllerGetSelectedNetworkClientAction, NetworkControllerGetSelectedChainIdAction, NetworkControllerGetEIP1559CompatibilityAction, NetworkControllerFindNetworkClientIdByChainIdAction, NetworkControllerSetProviderTypeAction, NetworkControllerSetActiveNetworkAction, NetworkControllerGetNetworkConfigurationByChainIdAction, NetworkControllerGetNetworkConfigurationByNetworkClientIdAction, NetworkControllerAddNetworkAction, NetworkControllerRemoveNetworkAction, NetworkControllerUpdateNetworkAction, NetworkControllerGetProviderAndBlockTrackerAction, NetworkControllerGetNetworkClientRegistryAction, NetworkControllerLookupNetworkAction, NetworkControllerLookupNetworkByClientIdAction, NetworkControllerGet1559CompatibilityWithNetworkClientIdAction, NetworkControllerResetConnectionAction, NetworkControllerRollbackToPreviousProviderAction, NetworkControllerLoadBackupAction, } from "./NetworkController-method-action-types.cjs";
 //# sourceMappingURL=index.d.cts.map

dist/index.d.cts.map

@@ -1,1 +0,1 @@
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dist/index.d.mts

@@ -11,6 +11,7 @@ export type { AutoManagedNetworkClient } from "./create-auto-managed-network-client.mjs";
 export type { RpcServiceRequestable } from "./rpc-service/rpc-service-requestable.mjs";
-export type { DegradedEventType, RetryReason } from "./create-network-client.mjs";
+export type { DegradedEventType, RetryReason, } from "./create-network-client.mjs";
 export { classifyRetryReason } from "./create-network-client.mjs";
+export type { NetworkControllerAnalyticsOptions, RpcServiceEventName, } from "./rpc-service-analytics.mjs";
 export { isConnectionError } from "./rpc-service/rpc-service.mjs";
 export type { NetworkControllerGetEthQueryAction, NetworkControllerGetNetworkClientByIdAction, NetworkControllerGetSelectedNetworkClientAction, NetworkControllerGetSelectedChainIdAction, NetworkControllerGetEIP1559CompatibilityAction, NetworkControllerFindNetworkClientIdByChainIdAction, NetworkControllerSetProviderTypeAction, NetworkControllerSetActiveNetworkAction, NetworkControllerGetNetworkConfigurationByChainIdAction, NetworkControllerGetNetworkConfigurationByNetworkClientIdAction, NetworkControllerAddNetworkAction, NetworkControllerRemoveNetworkAction, NetworkControllerUpdateNetworkAction, NetworkControllerGetProviderAndBlockTrackerAction, NetworkControllerGetNetworkClientRegistryAction, NetworkControllerLookupNetworkAction, NetworkControllerLookupNetworkByClientIdAction, NetworkControllerGet1559CompatibilityWithNetworkClientIdAction, NetworkControllerResetConnectionAction, NetworkControllerRollbackToPreviousProviderAction, NetworkControllerLoadBackupAction, } from "./NetworkController-method-action-types.mjs";
 //# sourceMappingURL=index.d.mts.map

dist/index.d.mts.map

@@ -1,1 +0,1 @@
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dist/index.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.mjs","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAmCA,OAAO,EACL,gCAAgC,EAChC,+BAA+B,EAC/B,WAAW,EACX,iBAAiB,EACjB,eAAe,EAChB,gCAA4B;AAC7B,gCAA4B;AAO5B,OAAO,EAAE,iBAAiB,EAAE,oBAAgB;AAK5C,OAAO,EAAE,mBAAmB,EAAE,oCAAgC;AAC9D,OAAO,EAAE,iBAAiB,EAAE,sCAAkC","sourcesContent":["export type { AutoManagedNetworkClient } from './create-auto-managed-network-client';\nexport type {\n  Block,\n  NetworkMetadata,\n  NetworkConfiguration,\n  BuiltInNetworkClientId,\n  CustomNetworkClientId,\n  NetworkClientId,\n  NetworksMetadata,\n  NetworkState,\n  BlockTrackerProxy,\n  ProviderProxy,\n  AddNetworkCustomRpcEndpointFields,\n  AddNetworkFields,\n  UpdateNetworkFields,\n  InfuraRpcEndpoint,\n  NetworkControllerStateChangeEvent,\n  NetworkControllerNetworkWillChangeEvent,\n  NetworkControllerNetworkDidChangeEvent,\n  NetworkControllerInfuraIsBlockedEvent,\n  NetworkControllerInfuraIsUnblockedEvent,\n  NetworkControllerNetworkAddedEvent,\n  NetworkControllerNetworkRemovedEvent,\n  NetworkControllerEvents,\n  NetworkControllerGetStateAction,\n  NetworkControllerActions,\n  NetworkControllerMessenger,\n  NetworkControllerOptions,\n  NetworkControllerRpcEndpointChainUnavailableEvent,\n  NetworkControllerRpcEndpointUnavailableEvent,\n  NetworkControllerRpcEndpointChainDegradedEvent,\n  NetworkControllerRpcEndpointDegradedEvent,\n  NetworkControllerRpcEndpointChainAvailableEvent,\n  NetworkControllerRpcEndpointRetriedEvent,\n} from './NetworkController';\nexport {\n  getDefaultNetworkControllerState,\n  selectAvailableNetworkClientIds,\n  knownKeysOf,\n  NetworkController,\n  RpcEndpointType,\n} from './NetworkController';\nexport * from './constants';\nexport type { BlockTracker, Provider } from './types';\nexport type {\n  NetworkClientConfiguration,\n  InfuraNetworkClientConfiguration,\n  CustomNetworkClientConfiguration,\n} from './types';\nexport { NetworkClientType } from './types';\nexport type { NetworkClient } from './create-network-client';\nexport type { AbstractRpcService } from './rpc-service/abstract-rpc-service';\nexport type { RpcServiceRequestable } from './rpc-service/rpc-service-requestable';\nexport type { DegradedEventType, RetryReason } from './create-network-client';\nexport { classifyRetryReason } from './create-network-client';\nexport { isConnectionError } from './rpc-service/rpc-service';\nexport type {\n  NetworkControllerGetEthQueryAction,\n  NetworkControllerGetNetworkClientByIdAction,\n  NetworkControllerGetSelectedNetworkClientAction,\n  NetworkControllerGetSelectedChainIdAction,\n  NetworkControllerGetEIP1559CompatibilityAction,\n  NetworkControllerFindNetworkClientIdByChainIdAction,\n  NetworkControllerSetProviderTypeAction,\n  NetworkControllerSetActiveNetworkAction,\n  NetworkControllerGetNetworkConfigurationByChainIdAction,\n  NetworkControllerGetNetworkConfigurationByNetworkClientIdAction,\n  NetworkControllerAddNetworkAction,\n  NetworkControllerRemoveNetworkAction,\n  NetworkControllerUpdateNetworkAction,\n  NetworkControllerGetProviderAndBlockTrackerAction,\n  NetworkControllerGetNetworkClientRegistryAction,\n  NetworkControllerLookupNetworkAction,\n  NetworkControllerLookupNetworkByClientIdAction,\n  NetworkControllerGet1559CompatibilityWithNetworkClientIdAction,\n  NetworkControllerResetConnectionAction,\n  NetworkControllerRollbackToPreviousProviderAction,\n  NetworkControllerLoadBackupAction,\n} from './NetworkController-method-action-types';\n"]}
+{"version":3,"file":"index.mjs","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAmCA,OAAO,EACL,gCAAgC,EAChC,+BAA+B,EAC/B,WAAW,EACX,iBAAiB,EACjB,eAAe,EAChB,gCAA+B;AAChC,gCAA+B;AAO/B,OAAO,EAAE,iBAAiB,EAAE,oBAAmB;AAQ/C,OAAO,EAAE,mBAAmB,EAAE,oCAAmC;AAKjE,OAAO,EAAE,iBAAiB,EAAE,sCAAqC","sourcesContent":["export type { AutoManagedNetworkClient } from './create-auto-managed-network-client.js';\nexport type {\n  Block,\n  NetworkMetadata,\n  NetworkConfiguration,\n  BuiltInNetworkClientId,\n  CustomNetworkClientId,\n  NetworkClientId,\n  NetworksMetadata,\n  NetworkState,\n  BlockTrackerProxy,\n  ProviderProxy,\n  AddNetworkCustomRpcEndpointFields,\n  AddNetworkFields,\n  UpdateNetworkFields,\n  InfuraRpcEndpoint,\n  NetworkControllerStateChangeEvent,\n  NetworkControllerNetworkWillChangeEvent,\n  NetworkControllerNetworkDidChangeEvent,\n  NetworkControllerInfuraIsBlockedEvent,\n  NetworkControllerInfuraIsUnblockedEvent,\n  NetworkControllerNetworkAddedEvent,\n  NetworkControllerNetworkRemovedEvent,\n  NetworkControllerEvents,\n  NetworkControllerGetStateAction,\n  NetworkControllerActions,\n  NetworkControllerMessenger,\n  NetworkControllerOptions,\n  NetworkControllerRpcEndpointChainUnavailableEvent,\n  NetworkControllerRpcEndpointUnavailableEvent,\n  NetworkControllerRpcEndpointChainDegradedEvent,\n  NetworkControllerRpcEndpointDegradedEvent,\n  NetworkControllerRpcEndpointChainAvailableEvent,\n  NetworkControllerRpcEndpointRetriedEvent,\n} from './NetworkController.js';\nexport {\n  getDefaultNetworkControllerState,\n  selectAvailableNetworkClientIds,\n  knownKeysOf,\n  NetworkController,\n  RpcEndpointType,\n} from './NetworkController.js';\nexport * from './constants.js';\nexport type { BlockTracker, Provider } from './types.js';\nexport type {\n  NetworkClientConfiguration,\n  InfuraNetworkClientConfiguration,\n  CustomNetworkClientConfiguration,\n} from './types.js';\nexport { NetworkClientType } from './types.js';\nexport type { NetworkClient } from './create-network-client.js';\nexport type { AbstractRpcService } from './rpc-service/abstract-rpc-service.js';\nexport type { RpcServiceRequestable } from './rpc-service/rpc-service-requestable.js';\nexport type {\n  DegradedEventType,\n  RetryReason,\n} from './create-network-client.js';\nexport { classifyRetryReason } from './create-network-client.js';\nexport type {\n  NetworkControllerAnalyticsOptions,\n  RpcServiceEventName,\n} from './rpc-service-analytics.js';\nexport { isConnectionError } from './rpc-service/rpc-service.js';\nexport type {\n  NetworkControllerGetEthQueryAction,\n  NetworkControllerGetNetworkClientByIdAction,\n  NetworkControllerGetSelectedNetworkClientAction,\n  NetworkControllerGetSelectedChainIdAction,\n  NetworkControllerGetEIP1559CompatibilityAction,\n  NetworkControllerFindNetworkClientIdByChainIdAction,\n  NetworkControllerSetProviderTypeAction,\n  NetworkControllerSetActiveNetworkAction,\n  NetworkControllerGetNetworkConfigurationByChainIdAction,\n  NetworkControllerGetNetworkConfigurationByNetworkClientIdAction,\n  NetworkControllerAddNetworkAction,\n  NetworkControllerRemoveNetworkAction,\n  NetworkControllerUpdateNetworkAction,\n  NetworkControllerGetProviderAndBlockTrackerAction,\n  NetworkControllerGetNetworkClientRegistryAction,\n  NetworkControllerLookupNetworkAction,\n  NetworkControllerLookupNetworkByClientIdAction,\n  NetworkControllerGet1559CompatibilityWithNetworkClientIdAction,\n  NetworkControllerResetConnectionAction,\n  NetworkControllerRollbackToPreviousProviderAction,\n  NetworkControllerLoadBackupAction,\n} from './NetworkController-method-action-types.js';\n"]}

dist/NetworkController-method-action-types.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"NetworkController-method-action-types.cjs","sourceRoot":"","sources":["../src/NetworkController-method-action-types.ts"],"names":[],"mappings":";AAAA;;;GAGG","sourcesContent":["/**\n * This file is auto generated.\n * Do not edit manually.\n */\n\nimport type { NetworkController } from './NetworkController';\n\n/**\n * Returns the EthQuery instance for the currently selected network.\n *\n * @returns The EthQuery instance, or undefined if the provider has not been\n * initialized.\n */\nexport type NetworkControllerGetEthQueryAction = {\n  type: `NetworkController:getEthQuery`;\n  handler: NetworkController['getEthQuery'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns The proxy and block tracker proxies.\n * @deprecated This method has been replaced by `getSelectedNetworkClient` (which has a more easily used return type) and will be removed in a future release.\n */\nexport type NetworkControllerGetProviderAndBlockTrackerAction = {\n  type: `NetworkController:getProviderAndBlockTracker`;\n  handler: NetworkController['getProviderAndBlockTracker'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns an object with the provider and block tracker proxies for the currently selected network.\n */\nexport type NetworkControllerGetSelectedNetworkClientAction = {\n  type: `NetworkController:getSelectedNetworkClient`;\n  handler: NetworkController['getSelectedNetworkClient'];\n};\n\n/**\n * Accesses the chain ID from the selected network client.\n *\n * @returns The chain ID of the selected network client in hex format or undefined if there is no network client.\n */\nexport type NetworkControllerGetSelectedChainIdAction = {\n  type: `NetworkController:getSelectedChainId`;\n  handler: NetworkController['getSelectedChainId'];\n};\n\n/**\n * Internally, the Infura and custom network clients are categorized by type\n * so that when accessing either kind of network client, TypeScript knows\n * which type to assign to the network client. For some cases it's more useful\n * to be able to access network clients by ID instead of by type and then ID,\n * so this function makes that possible.\n *\n * @returns The network clients registered so far, keyed by ID.\n */\nexport type NetworkControllerGetNetworkClientRegistryAction = {\n  type: `NetworkController:getNetworkClientRegistry`;\n  handler: NetworkController['getNetworkClientRegistry'];\n};\n\n/**\n * Returns the Infura network client with the given ID.\n *\n * @param infuraNetworkClientId - An Infura network client ID.\n * @returns The Infura network client.\n * @throws If an Infura network client does not exist with the given ID.\n */\nexport type NetworkControllerGetNetworkClientByIdAction = {\n  type: `NetworkController:getNetworkClientById`;\n  handler: NetworkController['getNetworkClientById'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given or selected network, persisting it to state:\n *\n * - The connectivity status: whether it is available, geo-blocked (Infura\n * only), unavailable, or unknown\n * - The capabilities status: whether it supports EIP-1559, whether it does\n * not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * If no ID is provided, uses the currently selected network.\n */\nexport type NetworkControllerLookupNetworkAction = {\n  type: `NetworkController:lookupNetwork`;\n  handler: NetworkController['lookupNetwork'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given network, persisting it to state:\n *\n * - The connectivity status: whether the network is available, geo-blocked\n * (Infura only), unavailable, or unknown\n * - The feature compatibility status: whether the network supports EIP-1559,\n * whether it does not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * @deprecated Please use `lookupNetwork` and pass a network client ID\n * instead. This method will be removed in a future major version.\n */\nexport type NetworkControllerLookupNetworkByClientIdAction = {\n  type: `NetworkController:lookupNetworkByClientId`;\n  handler: NetworkController['lookupNetworkByClientId'];\n};\n\n/**\n * Convenience method to update provider network type settings.\n *\n * @param type - Human readable network name.\n * @deprecated This has been replaced by `setActiveNetwork`, and will be\n * removed in a future release\n */\nexport type NetworkControllerSetProviderTypeAction = {\n  type: `NetworkController:setProviderType`;\n  handler: NetworkController['setProviderType'];\n};\n\n/**\n * Changes the selected network.\n *\n * @param networkClientId - The ID of a network client that will be used to\n * make requests.\n * @param options - Options for this method.\n * @param options.updateState - Allows for updating state.\n * @throws if no network client is associated with the given\n * network client ID.\n */\nexport type NetworkControllerSetActiveNetworkAction = {\n  type: `NetworkController:setActiveNetwork`;\n  handler: NetworkController['setActiveNetwork'];\n};\n\n/**\n * Determines whether the network supports EIP-1559 by checking whether the\n * latest block has a `baseFeePerGas` property, then updates state\n * appropriately.\n *\n * @param networkClientId - The networkClientId to fetch the correct provider against which to check 1559 compatibility.\n * @returns A promise that resolves to true if the network supports EIP-1559\n * , false otherwise, or `undefined` if unable to determine the compatibility.\n */\nexport type NetworkControllerGetEIP1559CompatibilityAction = {\n  type: `NetworkController:getEIP1559Compatibility`;\n  handler: NetworkController['getEIP1559Compatibility'];\n};\n\nexport type NetworkControllerGet1559CompatibilityWithNetworkClientIdAction = {\n  type: `NetworkController:get1559CompatibilityWithNetworkClientId`;\n  handler: NetworkController['get1559CompatibilityWithNetworkClientId'];\n};\n\n/**\n * Ensures that the provider and block tracker proxies are pointed to the\n * currently selected network and refreshes the metadata for the\n */\nexport type NetworkControllerResetConnectionAction = {\n  type: `NetworkController:resetConnection`;\n  handler: NetworkController['resetConnection'];\n};\n\n/**\n * Returns the network configuration that has been filed under the given chain\n * ID.\n *\n * @param chainId - The chain ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByChainIdAction = {\n  type: `NetworkController:getNetworkConfigurationByChainId`;\n  handler: NetworkController['getNetworkConfigurationByChainId'];\n};\n\n/**\n * Returns the network configuration that contains an RPC endpoint with the\n * given network client ID.\n *\n * @param networkClientId - The network client ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByNetworkClientIdAction = {\n  type: `NetworkController:getNetworkConfigurationByNetworkClientId`;\n  handler: NetworkController['getNetworkConfigurationByNetworkClientId'];\n};\n\n/**\n * Creates and registers network clients for the collection of Infura and\n * custom RPC endpoints that can be used to make requests for a particular\n * chain, storing the given configuration object in state for later reference.\n *\n * @param fields - The object that describes the new network/chain and lists\n * the RPC endpoints which front that chain.\n * @returns The newly added network configuration.\n * @throws if any part of `fields` would produce invalid state.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerAddNetworkAction = {\n  type: `NetworkController:addNetwork`;\n  handler: NetworkController['addNetwork'];\n};\n\n/**\n * Updates the configuration for a previously stored network filed under the\n * given chain ID, creating + registering new network clients to represent RPC\n * endpoints that have been added and destroying + unregistering existing\n * network clients for RPC endpoints that have been removed.\n *\n * Note that if `chainId` is changed, then all network clients associated with\n * that chain will be removed and re-added, even if none of the RPC endpoints\n * have changed.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @param fields - The object that describes the updates to the network/chain,\n * including the new set of RPC endpoints which should front that chain.\n * @param options - Options to provide.\n * @param options.replacementSelectedRpcEndpointIndex - Usually you cannot\n * remove an RPC endpoint that is being represented by the currently selected\n * network client. This option allows you to specify another RPC endpoint\n * (either an existing one or a new one) that should be used to select a new\n * network instead.\n * @returns The updated network configuration.\n * @throws if `chainId` does not refer to an existing network configuration,\n * if any part of `fields` would produce invalid state, etc.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerUpdateNetworkAction = {\n  type: `NetworkController:updateNetwork`;\n  handler: NetworkController['updateNetwork'];\n};\n\n/**\n * Destroys and unregisters the network identified by the given chain ID, also\n * removing the associated network configuration from state.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @throws if `chainId` does not refer to an existing network configuration,\n * or if the currently selected network is being removed.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerRemoveNetworkAction = {\n  type: `NetworkController:removeNetwork`;\n  handler: NetworkController['removeNetwork'];\n};\n\n/**\n * Assuming that the network has been previously switched, switches to this\n * new network.\n *\n * If the network has not been previously switched, this method is equivalent\n * to {@link resetConnection}.\n */\nexport type NetworkControllerRollbackToPreviousProviderAction = {\n  type: `NetworkController:rollbackToPreviousProvider`;\n  handler: NetworkController['rollbackToPreviousProvider'];\n};\n\n/**\n * Merges the given backup data into controller state.\n *\n * @param backup - The data that has been backed up.\n * @param backup.networkConfigurationsByChainId - Network configurations,\n * keyed by chain ID.\n */\nexport type NetworkControllerLoadBackupAction = {\n  type: `NetworkController:loadBackup`;\n  handler: NetworkController['loadBackup'];\n};\n\n/**\n * Searches for the default RPC endpoint configured for the given chain and\n * returns its network client ID. This can then be passed to\n * {@link getNetworkClientById} to retrieve the network client.\n *\n * @param chainId - Chain ID to search for.\n * @returns The ID of the network client created for the chain's default RPC\n * endpoint.\n */\nexport type NetworkControllerFindNetworkClientIdByChainIdAction = {\n  type: `NetworkController:findNetworkClientIdByChainId`;\n  handler: NetworkController['findNetworkClientIdByChainId'];\n};\n\n/**\n * Union of all NetworkController action types.\n */\nexport type NetworkControllerMethodActions =\n  | NetworkControllerGetEthQueryAction\n  | NetworkControllerGetProviderAndBlockTrackerAction\n  | NetworkControllerGetSelectedNetworkClientAction\n  | NetworkControllerGetSelectedChainIdAction\n  | NetworkControllerGetNetworkClientRegistryAction\n  | NetworkControllerGetNetworkClientByIdAction\n  | NetworkControllerLookupNetworkAction\n  | NetworkControllerLookupNetworkByClientIdAction\n  | NetworkControllerSetProviderTypeAction\n  | NetworkControllerSetActiveNetworkAction\n  | NetworkControllerGetEIP1559CompatibilityAction\n  | NetworkControllerGet1559CompatibilityWithNetworkClientIdAction\n  | NetworkControllerResetConnectionAction\n  | NetworkControllerGetNetworkConfigurationByChainIdAction\n  | NetworkControllerGetNetworkConfigurationByNetworkClientIdAction\n  | NetworkControllerAddNetworkAction\n  | NetworkControllerUpdateNetworkAction\n  | NetworkControllerRemoveNetworkAction\n  | NetworkControllerRollbackToPreviousProviderAction\n  | NetworkControllerLoadBackupAction\n  | NetworkControllerFindNetworkClientIdByChainIdAction;\n"]}
+{"version":3,"file":"NetworkController-method-action-types.cjs","sourceRoot":"","sources":["../src/NetworkController-method-action-types.ts"],"names":[],"mappings":";AAAA;;;GAGG","sourcesContent":["/**\n * This file is auto generated.\n * Do not edit manually.\n */\n\nimport type { NetworkController } from './NetworkController.js';\n\n/**\n * Returns the EthQuery instance for the currently selected network.\n *\n * @returns The EthQuery instance, or undefined if the provider has not been\n * initialized.\n */\nexport type NetworkControllerGetEthQueryAction = {\n  type: `NetworkController:getEthQuery`;\n  handler: NetworkController['getEthQuery'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns The proxy and block tracker proxies.\n * @deprecated This method has been replaced by `getSelectedNetworkClient` (which has a more easily used return type) and will be removed in a future release.\n */\nexport type NetworkControllerGetProviderAndBlockTrackerAction = {\n  type: `NetworkController:getProviderAndBlockTracker`;\n  handler: NetworkController['getProviderAndBlockTracker'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns an object with the provider and block tracker proxies for the currently selected network.\n */\nexport type NetworkControllerGetSelectedNetworkClientAction = {\n  type: `NetworkController:getSelectedNetworkClient`;\n  handler: NetworkController['getSelectedNetworkClient'];\n};\n\n/**\n * Accesses the chain ID from the selected network client.\n *\n * @returns The chain ID of the selected network client in hex format or undefined if there is no network client.\n */\nexport type NetworkControllerGetSelectedChainIdAction = {\n  type: `NetworkController:getSelectedChainId`;\n  handler: NetworkController['getSelectedChainId'];\n};\n\n/**\n * Internally, the Infura and custom network clients are categorized by type\n * so that when accessing either kind of network client, TypeScript knows\n * which type to assign to the network client. For some cases it's more useful\n * to be able to access network clients by ID instead of by type and then ID,\n * so this function makes that possible.\n *\n * @returns The network clients registered so far, keyed by ID.\n */\nexport type NetworkControllerGetNetworkClientRegistryAction = {\n  type: `NetworkController:getNetworkClientRegistry`;\n  handler: NetworkController['getNetworkClientRegistry'];\n};\n\n/**\n * Returns the Infura network client with the given ID.\n *\n * @param infuraNetworkClientId - An Infura network client ID.\n * @returns The Infura network client.\n * @throws If an Infura network client does not exist with the given ID.\n */\nexport type NetworkControllerGetNetworkClientByIdAction = {\n  type: `NetworkController:getNetworkClientById`;\n  handler: NetworkController['getNetworkClientById'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given or selected network, persisting it to state:\n *\n * - The connectivity status: whether it is available, geo-blocked (Infura\n * only), unavailable, or unknown\n * - The capabilities status: whether it supports EIP-1559, whether it does\n * not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * If no ID is provided, uses the currently selected network.\n */\nexport type NetworkControllerLookupNetworkAction = {\n  type: `NetworkController:lookupNetwork`;\n  handler: NetworkController['lookupNetwork'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given network, persisting it to state:\n *\n * - The connectivity status: whether the network is available, geo-blocked\n * (Infura only), unavailable, or unknown\n * - The feature compatibility status: whether the network supports EIP-1559,\n * whether it does not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * @deprecated Please use `lookupNetwork` and pass a network client ID\n * instead. This method will be removed in a future major version.\n */\nexport type NetworkControllerLookupNetworkByClientIdAction = {\n  type: `NetworkController:lookupNetworkByClientId`;\n  handler: NetworkController['lookupNetworkByClientId'];\n};\n\n/**\n * Convenience method to update provider network type settings.\n *\n * @param type - Human readable network name.\n * @deprecated This has been replaced by `setActiveNetwork`, and will be\n * removed in a future release\n */\nexport type NetworkControllerSetProviderTypeAction = {\n  type: `NetworkController:setProviderType`;\n  handler: NetworkController['setProviderType'];\n};\n\n/**\n * Changes the selected network.\n *\n * @param networkClientId - The ID of a network client that will be used to\n * make requests.\n * @param options - Options for this method.\n * @param options.updateState - Allows for updating state.\n * @throws if no network client is associated with the given\n * network client ID.\n */\nexport type NetworkControllerSetActiveNetworkAction = {\n  type: `NetworkController:setActiveNetwork`;\n  handler: NetworkController['setActiveNetwork'];\n};\n\n/**\n * Determines whether the network supports EIP-1559 by checking whether the\n * latest block has a `baseFeePerGas` property, then updates state\n * appropriately.\n *\n * @param networkClientId - The networkClientId to fetch the correct provider against which to check 1559 compatibility.\n * @returns A promise that resolves to true if the network supports EIP-1559\n * , false otherwise, or `undefined` if unable to determine the compatibility.\n */\nexport type NetworkControllerGetEIP1559CompatibilityAction = {\n  type: `NetworkController:getEIP1559Compatibility`;\n  handler: NetworkController['getEIP1559Compatibility'];\n};\n\nexport type NetworkControllerGet1559CompatibilityWithNetworkClientIdAction = {\n  type: `NetworkController:get1559CompatibilityWithNetworkClientId`;\n  handler: NetworkController['get1559CompatibilityWithNetworkClientId'];\n};\n\n/**\n * Ensures that the provider and block tracker proxies are pointed to the\n * currently selected network and refreshes the metadata for the\n */\nexport type NetworkControllerResetConnectionAction = {\n  type: `NetworkController:resetConnection`;\n  handler: NetworkController['resetConnection'];\n};\n\n/**\n * Returns the network configuration that has been filed under the given chain\n * ID.\n *\n * @param chainId - The chain ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByChainIdAction = {\n  type: `NetworkController:getNetworkConfigurationByChainId`;\n  handler: NetworkController['getNetworkConfigurationByChainId'];\n};\n\n/**\n * Returns the network configuration that contains an RPC endpoint with the\n * given network client ID.\n *\n * @param networkClientId - The network client ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByNetworkClientIdAction = {\n  type: `NetworkController:getNetworkConfigurationByNetworkClientId`;\n  handler: NetworkController['getNetworkConfigurationByNetworkClientId'];\n};\n\n/**\n * Creates and registers network clients for the collection of Infura and\n * custom RPC endpoints that can be used to make requests for a particular\n * chain, storing the given configuration object in state for later reference.\n *\n * @param fields - The object that describes the new network/chain and lists\n * the RPC endpoints which front that chain.\n * @returns The newly added network configuration.\n * @throws if any part of `fields` would produce invalid state.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerAddNetworkAction = {\n  type: `NetworkController:addNetwork`;\n  handler: NetworkController['addNetwork'];\n};\n\n/**\n * Updates the configuration for a previously stored network filed under the\n * given chain ID, creating + registering new network clients to represent RPC\n * endpoints that have been added and destroying + unregistering existing\n * network clients for RPC endpoints that have been removed.\n *\n * Note that if `chainId` is changed, then all network clients associated with\n * that chain will be removed and re-added, even if none of the RPC endpoints\n * have changed.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @param fields - The object that describes the updates to the network/chain,\n * including the new set of RPC endpoints which should front that chain.\n * @param options - Options to provide.\n * @param options.replacementSelectedRpcEndpointIndex - Usually you cannot\n * remove an RPC endpoint that is being represented by the currently selected\n * network client. This option allows you to specify another RPC endpoint\n * (either an existing one or a new one) that should be used to select a new\n * network instead.\n * @returns The updated network configuration.\n * @throws if `chainId` does not refer to an existing network configuration,\n * if any part of `fields` would produce invalid state, etc.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerUpdateNetworkAction = {\n  type: `NetworkController:updateNetwork`;\n  handler: NetworkController['updateNetwork'];\n};\n\n/**\n * Destroys and unregisters the network identified by the given chain ID, also\n * removing the associated network configuration from state.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @throws if `chainId` does not refer to an existing network configuration,\n * or if the currently selected network is being removed.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerRemoveNetworkAction = {\n  type: `NetworkController:removeNetwork`;\n  handler: NetworkController['removeNetwork'];\n};\n\n/**\n * Assuming that the network has been previously switched, switches to this\n * new network.\n *\n * If the network has not been previously switched, this method is equivalent\n * to {@link resetConnection}.\n */\nexport type NetworkControllerRollbackToPreviousProviderAction = {\n  type: `NetworkController:rollbackToPreviousProvider`;\n  handler: NetworkController['rollbackToPreviousProvider'];\n};\n\n/**\n * Merges the given backup data into controller state.\n *\n * @param backup - The data that has been backed up.\n * @param backup.networkConfigurationsByChainId - Network configurations,\n * keyed by chain ID.\n */\nexport type NetworkControllerLoadBackupAction = {\n  type: `NetworkController:loadBackup`;\n  handler: NetworkController['loadBackup'];\n};\n\n/**\n * Searches for the default RPC endpoint configured for the given chain and\n * returns its network client ID. This can then be passed to\n * {@link getNetworkClientById} to retrieve the network client.\n *\n * @param chainId - Chain ID to search for.\n * @returns The ID of the network client created for the chain's default RPC\n * endpoint.\n */\nexport type NetworkControllerFindNetworkClientIdByChainIdAction = {\n  type: `NetworkController:findNetworkClientIdByChainId`;\n  handler: NetworkController['findNetworkClientIdByChainId'];\n};\n\n/**\n * Union of all NetworkController action types.\n */\nexport type NetworkControllerMethodActions =\n  | NetworkControllerGetEthQueryAction\n  | NetworkControllerGetProviderAndBlockTrackerAction\n  | NetworkControllerGetSelectedNetworkClientAction\n  | NetworkControllerGetSelectedChainIdAction\n  | NetworkControllerGetNetworkClientRegistryAction\n  | NetworkControllerGetNetworkClientByIdAction\n  | NetworkControllerLookupNetworkAction\n  | NetworkControllerLookupNetworkByClientIdAction\n  | NetworkControllerSetProviderTypeAction\n  | NetworkControllerSetActiveNetworkAction\n  | NetworkControllerGetEIP1559CompatibilityAction\n  | NetworkControllerGet1559CompatibilityWithNetworkClientIdAction\n  | NetworkControllerResetConnectionAction\n  | NetworkControllerGetNetworkConfigurationByChainIdAction\n  | NetworkControllerGetNetworkConfigurationByNetworkClientIdAction\n  | NetworkControllerAddNetworkAction\n  | NetworkControllerUpdateNetworkAction\n  | NetworkControllerRemoveNetworkAction\n  | NetworkControllerRollbackToPreviousProviderAction\n  | NetworkControllerLoadBackupAction\n  | NetworkControllerFindNetworkClientIdByChainIdAction;\n"]}

dist/NetworkController-method-action-types.d.cts.map

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dist/NetworkController-method-action-types.d.mts.map

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dist/NetworkController-method-action-types.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"NetworkController-method-action-types.mjs","sourceRoot":"","sources":["../src/NetworkController-method-action-types.ts"],"names":[],"mappings":"AAAA;;;GAGG","sourcesContent":["/**\n * This file is auto generated.\n * Do not edit manually.\n */\n\nimport type { NetworkController } from './NetworkController';\n\n/**\n * Returns the EthQuery instance for the currently selected network.\n *\n * @returns The EthQuery instance, or undefined if the provider has not been\n * initialized.\n */\nexport type NetworkControllerGetEthQueryAction = {\n  type: `NetworkController:getEthQuery`;\n  handler: NetworkController['getEthQuery'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns The proxy and block tracker proxies.\n * @deprecated This method has been replaced by `getSelectedNetworkClient` (which has a more easily used return type) and will be removed in a future release.\n */\nexport type NetworkControllerGetProviderAndBlockTrackerAction = {\n  type: `NetworkController:getProviderAndBlockTracker`;\n  handler: NetworkController['getProviderAndBlockTracker'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns an object with the provider and block tracker proxies for the currently selected network.\n */\nexport type NetworkControllerGetSelectedNetworkClientAction = {\n  type: `NetworkController:getSelectedNetworkClient`;\n  handler: NetworkController['getSelectedNetworkClient'];\n};\n\n/**\n * Accesses the chain ID from the selected network client.\n *\n * @returns The chain ID of the selected network client in hex format or undefined if there is no network client.\n */\nexport type NetworkControllerGetSelectedChainIdAction = {\n  type: `NetworkController:getSelectedChainId`;\n  handler: NetworkController['getSelectedChainId'];\n};\n\n/**\n * Internally, the Infura and custom network clients are categorized by type\n * so that when accessing either kind of network client, TypeScript knows\n * which type to assign to the network client. For some cases it's more useful\n * to be able to access network clients by ID instead of by type and then ID,\n * so this function makes that possible.\n *\n * @returns The network clients registered so far, keyed by ID.\n */\nexport type NetworkControllerGetNetworkClientRegistryAction = {\n  type: `NetworkController:getNetworkClientRegistry`;\n  handler: NetworkController['getNetworkClientRegistry'];\n};\n\n/**\n * Returns the Infura network client with the given ID.\n *\n * @param infuraNetworkClientId - An Infura network client ID.\n * @returns The Infura network client.\n * @throws If an Infura network client does not exist with the given ID.\n */\nexport type NetworkControllerGetNetworkClientByIdAction = {\n  type: `NetworkController:getNetworkClientById`;\n  handler: NetworkController['getNetworkClientById'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given or selected network, persisting it to state:\n *\n * - The connectivity status: whether it is available, geo-blocked (Infura\n * only), unavailable, or unknown\n * - The capabilities status: whether it supports EIP-1559, whether it does\n * not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * If no ID is provided, uses the currently selected network.\n */\nexport type NetworkControllerLookupNetworkAction = {\n  type: `NetworkController:lookupNetwork`;\n  handler: NetworkController['lookupNetwork'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given network, persisting it to state:\n *\n * - The connectivity status: whether the network is available, geo-blocked\n * (Infura only), unavailable, or unknown\n * - The feature compatibility status: whether the network supports EIP-1559,\n * whether it does not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * @deprecated Please use `lookupNetwork` and pass a network client ID\n * instead. This method will be removed in a future major version.\n */\nexport type NetworkControllerLookupNetworkByClientIdAction = {\n  type: `NetworkController:lookupNetworkByClientId`;\n  handler: NetworkController['lookupNetworkByClientId'];\n};\n\n/**\n * Convenience method to update provider network type settings.\n *\n * @param type - Human readable network name.\n * @deprecated This has been replaced by `setActiveNetwork`, and will be\n * removed in a future release\n */\nexport type NetworkControllerSetProviderTypeAction = {\n  type: `NetworkController:setProviderType`;\n  handler: NetworkController['setProviderType'];\n};\n\n/**\n * Changes the selected network.\n *\n * @param networkClientId - The ID of a network client that will be used to\n * make requests.\n * @param options - Options for this method.\n * @param options.updateState - Allows for updating state.\n * @throws if no network client is associated with the given\n * network client ID.\n */\nexport type NetworkControllerSetActiveNetworkAction = {\n  type: `NetworkController:setActiveNetwork`;\n  handler: NetworkController['setActiveNetwork'];\n};\n\n/**\n * Determines whether the network supports EIP-1559 by checking whether the\n * latest block has a `baseFeePerGas` property, then updates state\n * appropriately.\n *\n * @param networkClientId - The networkClientId to fetch the correct provider against which to check 1559 compatibility.\n * @returns A promise that resolves to true if the network supports EIP-1559\n * , false otherwise, or `undefined` if unable to determine the compatibility.\n */\nexport type NetworkControllerGetEIP1559CompatibilityAction = {\n  type: `NetworkController:getEIP1559Compatibility`;\n  handler: NetworkController['getEIP1559Compatibility'];\n};\n\nexport type NetworkControllerGet1559CompatibilityWithNetworkClientIdAction = {\n  type: `NetworkController:get1559CompatibilityWithNetworkClientId`;\n  handler: NetworkController['get1559CompatibilityWithNetworkClientId'];\n};\n\n/**\n * Ensures that the provider and block tracker proxies are pointed to the\n * currently selected network and refreshes the metadata for the\n */\nexport type NetworkControllerResetConnectionAction = {\n  type: `NetworkController:resetConnection`;\n  handler: NetworkController['resetConnection'];\n};\n\n/**\n * Returns the network configuration that has been filed under the given chain\n * ID.\n *\n * @param chainId - The chain ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByChainIdAction = {\n  type: `NetworkController:getNetworkConfigurationByChainId`;\n  handler: NetworkController['getNetworkConfigurationByChainId'];\n};\n\n/**\n * Returns the network configuration that contains an RPC endpoint with the\n * given network client ID.\n *\n * @param networkClientId - The network client ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByNetworkClientIdAction = {\n  type: `NetworkController:getNetworkConfigurationByNetworkClientId`;\n  handler: NetworkController['getNetworkConfigurationByNetworkClientId'];\n};\n\n/**\n * Creates and registers network clients for the collection of Infura and\n * custom RPC endpoints that can be used to make requests for a particular\n * chain, storing the given configuration object in state for later reference.\n *\n * @param fields - The object that describes the new network/chain and lists\n * the RPC endpoints which front that chain.\n * @returns The newly added network configuration.\n * @throws if any part of `fields` would produce invalid state.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerAddNetworkAction = {\n  type: `NetworkController:addNetwork`;\n  handler: NetworkController['addNetwork'];\n};\n\n/**\n * Updates the configuration for a previously stored network filed under the\n * given chain ID, creating + registering new network clients to represent RPC\n * endpoints that have been added and destroying + unregistering existing\n * network clients for RPC endpoints that have been removed.\n *\n * Note that if `chainId` is changed, then all network clients associated with\n * that chain will be removed and re-added, even if none of the RPC endpoints\n * have changed.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @param fields - The object that describes the updates to the network/chain,\n * including the new set of RPC endpoints which should front that chain.\n * @param options - Options to provide.\n * @param options.replacementSelectedRpcEndpointIndex - Usually you cannot\n * remove an RPC endpoint that is being represented by the currently selected\n * network client. This option allows you to specify another RPC endpoint\n * (either an existing one or a new one) that should be used to select a new\n * network instead.\n * @returns The updated network configuration.\n * @throws if `chainId` does not refer to an existing network configuration,\n * if any part of `fields` would produce invalid state, etc.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerUpdateNetworkAction = {\n  type: `NetworkController:updateNetwork`;\n  handler: NetworkController['updateNetwork'];\n};\n\n/**\n * Destroys and unregisters the network identified by the given chain ID, also\n * removing the associated network configuration from state.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @throws if `chainId` does not refer to an existing network configuration,\n * or if the currently selected network is being removed.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerRemoveNetworkAction = {\n  type: `NetworkController:removeNetwork`;\n  handler: NetworkController['removeNetwork'];\n};\n\n/**\n * Assuming that the network has been previously switched, switches to this\n * new network.\n *\n * If the network has not been previously switched, this method is equivalent\n * to {@link resetConnection}.\n */\nexport type NetworkControllerRollbackToPreviousProviderAction = {\n  type: `NetworkController:rollbackToPreviousProvider`;\n  handler: NetworkController['rollbackToPreviousProvider'];\n};\n\n/**\n * Merges the given backup data into controller state.\n *\n * @param backup - The data that has been backed up.\n * @param backup.networkConfigurationsByChainId - Network configurations,\n * keyed by chain ID.\n */\nexport type NetworkControllerLoadBackupAction = {\n  type: `NetworkController:loadBackup`;\n  handler: NetworkController['loadBackup'];\n};\n\n/**\n * Searches for the default RPC endpoint configured for the given chain and\n * returns its network client ID. This can then be passed to\n * {@link getNetworkClientById} to retrieve the network client.\n *\n * @param chainId - Chain ID to search for.\n * @returns The ID of the network client created for the chain's default RPC\n * endpoint.\n */\nexport type NetworkControllerFindNetworkClientIdByChainIdAction = {\n  type: `NetworkController:findNetworkClientIdByChainId`;\n  handler: NetworkController['findNetworkClientIdByChainId'];\n};\n\n/**\n * Union of all NetworkController action types.\n */\nexport type NetworkControllerMethodActions =\n  | NetworkControllerGetEthQueryAction\n  | NetworkControllerGetProviderAndBlockTrackerAction\n  | NetworkControllerGetSelectedNetworkClientAction\n  | NetworkControllerGetSelectedChainIdAction\n  | NetworkControllerGetNetworkClientRegistryAction\n  | NetworkControllerGetNetworkClientByIdAction\n  | NetworkControllerLookupNetworkAction\n  | NetworkControllerLookupNetworkByClientIdAction\n  | NetworkControllerSetProviderTypeAction\n  | NetworkControllerSetActiveNetworkAction\n  | NetworkControllerGetEIP1559CompatibilityAction\n  | NetworkControllerGet1559CompatibilityWithNetworkClientIdAction\n  | NetworkControllerResetConnectionAction\n  | NetworkControllerGetNetworkConfigurationByChainIdAction\n  | NetworkControllerGetNetworkConfigurationByNetworkClientIdAction\n  | NetworkControllerAddNetworkAction\n  | NetworkControllerUpdateNetworkAction\n  | NetworkControllerRemoveNetworkAction\n  | NetworkControllerRollbackToPreviousProviderAction\n  | NetworkControllerLoadBackupAction\n  | NetworkControllerFindNetworkClientIdByChainIdAction;\n"]}
+{"version":3,"file":"NetworkController-method-action-types.mjs","sourceRoot":"","sources":["../src/NetworkController-method-action-types.ts"],"names":[],"mappings":"AAAA;;;GAGG","sourcesContent":["/**\n * This file is auto generated.\n * Do not edit manually.\n */\n\nimport type { NetworkController } from './NetworkController.js';\n\n/**\n * Returns the EthQuery instance for the currently selected network.\n *\n * @returns The EthQuery instance, or undefined if the provider has not been\n * initialized.\n */\nexport type NetworkControllerGetEthQueryAction = {\n  type: `NetworkController:getEthQuery`;\n  handler: NetworkController['getEthQuery'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns The proxy and block tracker proxies.\n * @deprecated This method has been replaced by `getSelectedNetworkClient` (which has a more easily used return type) and will be removed in a future release.\n */\nexport type NetworkControllerGetProviderAndBlockTrackerAction = {\n  type: `NetworkController:getProviderAndBlockTracker`;\n  handler: NetworkController['getProviderAndBlockTracker'];\n};\n\n/**\n * Accesses the provider and block tracker for the currently selected network.\n *\n * @returns an object with the provider and block tracker proxies for the currently selected network.\n */\nexport type NetworkControllerGetSelectedNetworkClientAction = {\n  type: `NetworkController:getSelectedNetworkClient`;\n  handler: NetworkController['getSelectedNetworkClient'];\n};\n\n/**\n * Accesses the chain ID from the selected network client.\n *\n * @returns The chain ID of the selected network client in hex format or undefined if there is no network client.\n */\nexport type NetworkControllerGetSelectedChainIdAction = {\n  type: `NetworkController:getSelectedChainId`;\n  handler: NetworkController['getSelectedChainId'];\n};\n\n/**\n * Internally, the Infura and custom network clients are categorized by type\n * so that when accessing either kind of network client, TypeScript knows\n * which type to assign to the network client. For some cases it's more useful\n * to be able to access network clients by ID instead of by type and then ID,\n * so this function makes that possible.\n *\n * @returns The network clients registered so far, keyed by ID.\n */\nexport type NetworkControllerGetNetworkClientRegistryAction = {\n  type: `NetworkController:getNetworkClientRegistry`;\n  handler: NetworkController['getNetworkClientRegistry'];\n};\n\n/**\n * Returns the Infura network client with the given ID.\n *\n * @param infuraNetworkClientId - An Infura network client ID.\n * @returns The Infura network client.\n * @throws If an Infura network client does not exist with the given ID.\n */\nexport type NetworkControllerGetNetworkClientByIdAction = {\n  type: `NetworkController:getNetworkClientById`;\n  handler: NetworkController['getNetworkClientById'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given or selected network, persisting it to state:\n *\n * - The connectivity status: whether it is available, geo-blocked (Infura\n * only), unavailable, or unknown\n * - The capabilities status: whether it supports EIP-1559, whether it does\n * not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * If no ID is provided, uses the currently selected network.\n */\nexport type NetworkControllerLookupNetworkAction = {\n  type: `NetworkController:lookupNetwork`;\n  handler: NetworkController['lookupNetwork'];\n};\n\n/**\n * Uses a request for the latest block to gather the following information on\n * the given network, persisting it to state:\n *\n * - The connectivity status: whether the network is available, geo-blocked\n * (Infura only), unavailable, or unknown\n * - The feature compatibility status: whether the network supports EIP-1559,\n * whether it does not, or whether it is unknown\n *\n * @param networkClientId - The ID of the network client to inspect.\n * @deprecated Please use `lookupNetwork` and pass a network client ID\n * instead. This method will be removed in a future major version.\n */\nexport type NetworkControllerLookupNetworkByClientIdAction = {\n  type: `NetworkController:lookupNetworkByClientId`;\n  handler: NetworkController['lookupNetworkByClientId'];\n};\n\n/**\n * Convenience method to update provider network type settings.\n *\n * @param type - Human readable network name.\n * @deprecated This has been replaced by `setActiveNetwork`, and will be\n * removed in a future release\n */\nexport type NetworkControllerSetProviderTypeAction = {\n  type: `NetworkController:setProviderType`;\n  handler: NetworkController['setProviderType'];\n};\n\n/**\n * Changes the selected network.\n *\n * @param networkClientId - The ID of a network client that will be used to\n * make requests.\n * @param options - Options for this method.\n * @param options.updateState - Allows for updating state.\n * @throws if no network client is associated with the given\n * network client ID.\n */\nexport type NetworkControllerSetActiveNetworkAction = {\n  type: `NetworkController:setActiveNetwork`;\n  handler: NetworkController['setActiveNetwork'];\n};\n\n/**\n * Determines whether the network supports EIP-1559 by checking whether the\n * latest block has a `baseFeePerGas` property, then updates state\n * appropriately.\n *\n * @param networkClientId - The networkClientId to fetch the correct provider against which to check 1559 compatibility.\n * @returns A promise that resolves to true if the network supports EIP-1559\n * , false otherwise, or `undefined` if unable to determine the compatibility.\n */\nexport type NetworkControllerGetEIP1559CompatibilityAction = {\n  type: `NetworkController:getEIP1559Compatibility`;\n  handler: NetworkController['getEIP1559Compatibility'];\n};\n\nexport type NetworkControllerGet1559CompatibilityWithNetworkClientIdAction = {\n  type: `NetworkController:get1559CompatibilityWithNetworkClientId`;\n  handler: NetworkController['get1559CompatibilityWithNetworkClientId'];\n};\n\n/**\n * Ensures that the provider and block tracker proxies are pointed to the\n * currently selected network and refreshes the metadata for the\n */\nexport type NetworkControllerResetConnectionAction = {\n  type: `NetworkController:resetConnection`;\n  handler: NetworkController['resetConnection'];\n};\n\n/**\n * Returns the network configuration that has been filed under the given chain\n * ID.\n *\n * @param chainId - The chain ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByChainIdAction = {\n  type: `NetworkController:getNetworkConfigurationByChainId`;\n  handler: NetworkController['getNetworkConfigurationByChainId'];\n};\n\n/**\n * Returns the network configuration that contains an RPC endpoint with the\n * given network client ID.\n *\n * @param networkClientId - The network client ID to use as a key.\n * @returns The network configuration if one exists, or undefined.\n */\nexport type NetworkControllerGetNetworkConfigurationByNetworkClientIdAction = {\n  type: `NetworkController:getNetworkConfigurationByNetworkClientId`;\n  handler: NetworkController['getNetworkConfigurationByNetworkClientId'];\n};\n\n/**\n * Creates and registers network clients for the collection of Infura and\n * custom RPC endpoints that can be used to make requests for a particular\n * chain, storing the given configuration object in state for later reference.\n *\n * @param fields - The object that describes the new network/chain and lists\n * the RPC endpoints which front that chain.\n * @returns The newly added network configuration.\n * @throws if any part of `fields` would produce invalid state.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerAddNetworkAction = {\n  type: `NetworkController:addNetwork`;\n  handler: NetworkController['addNetwork'];\n};\n\n/**\n * Updates the configuration for a previously stored network filed under the\n * given chain ID, creating + registering new network clients to represent RPC\n * endpoints that have been added and destroying + unregistering existing\n * network clients for RPC endpoints that have been removed.\n *\n * Note that if `chainId` is changed, then all network clients associated with\n * that chain will be removed and re-added, even if none of the RPC endpoints\n * have changed.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @param fields - The object that describes the updates to the network/chain,\n * including the new set of RPC endpoints which should front that chain.\n * @param options - Options to provide.\n * @param options.replacementSelectedRpcEndpointIndex - Usually you cannot\n * remove an RPC endpoint that is being represented by the currently selected\n * network client. This option allows you to specify another RPC endpoint\n * (either an existing one or a new one) that should be used to select a new\n * network instead.\n * @returns The updated network configuration.\n * @throws if `chainId` does not refer to an existing network configuration,\n * if any part of `fields` would produce invalid state, etc.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerUpdateNetworkAction = {\n  type: `NetworkController:updateNetwork`;\n  handler: NetworkController['updateNetwork'];\n};\n\n/**\n * Destroys and unregisters the network identified by the given chain ID, also\n * removing the associated network configuration from state.\n *\n * @param chainId - The chain ID associated with an existing network.\n * @throws if `chainId` does not refer to an existing network configuration,\n * or if the currently selected network is being removed.\n * @see {@link NetworkConfiguration}\n */\nexport type NetworkControllerRemoveNetworkAction = {\n  type: `NetworkController:removeNetwork`;\n  handler: NetworkController['removeNetwork'];\n};\n\n/**\n * Assuming that the network has been previously switched, switches to this\n * new network.\n *\n * If the network has not been previously switched, this method is equivalent\n * to {@link resetConnection}.\n */\nexport type NetworkControllerRollbackToPreviousProviderAction = {\n  type: `NetworkController:rollbackToPreviousProvider`;\n  handler: NetworkController['rollbackToPreviousProvider'];\n};\n\n/**\n * Merges the given backup data into controller state.\n *\n * @param backup - The data that has been backed up.\n * @param backup.networkConfigurationsByChainId - Network configurations,\n * keyed by chain ID.\n */\nexport type NetworkControllerLoadBackupAction = {\n  type: `NetworkController:loadBackup`;\n  handler: NetworkController['loadBackup'];\n};\n\n/**\n * Searches for the default RPC endpoint configured for the given chain and\n * returns its network client ID. This can then be passed to\n * {@link getNetworkClientById} to retrieve the network client.\n *\n * @param chainId - Chain ID to search for.\n * @returns The ID of the network client created for the chain's default RPC\n * endpoint.\n */\nexport type NetworkControllerFindNetworkClientIdByChainIdAction = {\n  type: `NetworkController:findNetworkClientIdByChainId`;\n  handler: NetworkController['findNetworkClientIdByChainId'];\n};\n\n/**\n * Union of all NetworkController action types.\n */\nexport type NetworkControllerMethodActions =\n  | NetworkControllerGetEthQueryAction\n  | NetworkControllerGetProviderAndBlockTrackerAction\n  | NetworkControllerGetSelectedNetworkClientAction\n  | NetworkControllerGetSelectedChainIdAction\n  | NetworkControllerGetNetworkClientRegistryAction\n  | NetworkControllerGetNetworkClientByIdAction\n  | NetworkControllerLookupNetworkAction\n  | NetworkControllerLookupNetworkByClientIdAction\n  | NetworkControllerSetProviderTypeAction\n  | NetworkControllerSetActiveNetworkAction\n  | NetworkControllerGetEIP1559CompatibilityAction\n  | NetworkControllerGet1559CompatibilityWithNetworkClientIdAction\n  | NetworkControllerResetConnectionAction\n  | NetworkControllerGetNetworkConfigurationByChainIdAction\n  | NetworkControllerGetNetworkConfigurationByNetworkClientIdAction\n  | NetworkControllerAddNetworkAction\n  | NetworkControllerUpdateNetworkAction\n  | NetworkControllerRemoveNetworkAction\n  | NetworkControllerRollbackToPreviousProviderAction\n  | NetworkControllerLoadBackupAction\n  | NetworkControllerFindNetworkClientIdByChainIdAction;\n"]}

dist/NetworkController.d.cts

@@ -0,1 +1,2 @@
+import type { AnalyticsControllerGetStateAction, AnalyticsControllerTrackEventAction } from "@metamask/analytics-controller";
 import type { ControllerGetStateAction, ControllerStateChangeEvent } from "@metamask/base-controller";
@@ -18,2 +19,3 @@ import { BaseController } from "@metamask/base-controller";
 import type { NetworkControllerMethodActions } from "./NetworkController-method-action-types.cjs";
+import type { NetworkControllerAnalyticsOptions } from "./rpc-service-analytics.cjs";
 import type { RpcServiceOptionsWithDefaults } from "./rpc-service/rpc-service.cjs";
@@ -238,3 +240,3 @@ import { NetworkClientType } from "./types.cjs";
  */
-export type BuiltInNetworkClientId = InfuraNetworkType;
+export type BuiltInNetworkClientId = string;
 /**
@@ -548,3 +550,3 @@ * The string that uniquely identifies a custom network client.
  */
-type AllowedActions = ConnectivityControllerGetStateAction | RemoteFeatureFlagControllerGetStateAction;
+type AllowedActions = ConnectivityControllerGetStateAction | RemoteFeatureFlagControllerGetStateAction | AnalyticsControllerGetStateAction | AnalyticsControllerTrackEventAction;
 export type NetworkControllerMessenger = Messenger<typeof controllerName, NetworkControllerActions | AllowedActions, NetworkControllerEvents | AllowedEvents>;
@@ -592,2 +594,12 @@ /**
     getBlockTrackerOptions?: (rpcEndpointUrl: string) => Omit<PollingBlockTrackerOptions, 'provider'>;
+    /**
+     * Configuration for the "RPC Service Unavailable" and "RPC Service Degraded"
+     * analytics events the controller emits via the `AnalyticsController:trackEvent`
+     * action when an RPC endpoint becomes unavailable or degraded. Both the option
+     * and its properties are optional; omitted properties default to
+     * `isRpcEndpointUrlPublic: () => false` and `rpcServiceEventsSampleRate: 0`
+     * (which emits nothing). The messenger must allow `AnalyticsController:getState`
+     * and `AnalyticsController:trackEvent` regardless.
+     */
+    analyticsOptions?: NetworkControllerAnalyticsOptions;
 };
@@ -594,0 +606,0 @@ /**

dist/NetworkController.d.cts.map

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dist/NetworkController.d.mts

@@ -0,1 +1,2 @@
+import type { AnalyticsControllerGetStateAction, AnalyticsControllerTrackEventAction } from "@metamask/analytics-controller";
 import type { ControllerGetStateAction, ControllerStateChangeEvent } from "@metamask/base-controller";
@@ -18,2 +19,3 @@ import { BaseController } from "@metamask/base-controller";
 import type { NetworkControllerMethodActions } from "./NetworkController-method-action-types.mjs";
+import type { NetworkControllerAnalyticsOptions } from "./rpc-service-analytics.mjs";
 import type { RpcServiceOptionsWithDefaults } from "./rpc-service/rpc-service.mjs";
@@ -238,3 +240,3 @@ import { NetworkClientType } from "./types.mjs";
  */
-export type BuiltInNetworkClientId = InfuraNetworkType;
+export type BuiltInNetworkClientId = string;
 /**
@@ -548,3 +550,3 @@ * The string that uniquely identifies a custom network client.
  */
-type AllowedActions = ConnectivityControllerGetStateAction | RemoteFeatureFlagControllerGetStateAction;
+type AllowedActions = ConnectivityControllerGetStateAction | RemoteFeatureFlagControllerGetStateAction | AnalyticsControllerGetStateAction | AnalyticsControllerTrackEventAction;
 export type NetworkControllerMessenger = Messenger<typeof controllerName, NetworkControllerActions | AllowedActions, NetworkControllerEvents | AllowedEvents>;
@@ -592,2 +594,12 @@ /**
     getBlockTrackerOptions?: (rpcEndpointUrl: string) => Omit<PollingBlockTrackerOptions, 'provider'>;
+    /**
+     * Configuration for the "RPC Service Unavailable" and "RPC Service Degraded"
+     * analytics events the controller emits via the `AnalyticsController:trackEvent`
+     * action when an RPC endpoint becomes unavailable or degraded. Both the option
+     * and its properties are optional; omitted properties default to
+     * `isRpcEndpointUrlPublic: () => false` and `rpcServiceEventsSampleRate: 0`
+     * (which emits nothing). The messenger must allow `AnalyticsController:getState`
+     * and `AnalyticsController:trackEvent` regardless.
+     */
+    analyticsOptions?: NetworkControllerAnalyticsOptions;
 };
@@ -594,0 +606,0 @@ /**

dist/NetworkController.d.mts.map

@@ -1,1 +0,1 @@
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dist/rpc-service/abstract-rpc-service.cjs.map

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dist/rpc-service/abstract-rpc-service.d.cts.map

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dist/rpc-service/abstract-rpc-service.d.mts.map

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dist/rpc-service/abstract-rpc-service.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"abstract-rpc-service.mjs","sourceRoot":"","sources":["../../src/rpc-service/abstract-rpc-service.ts"],"names":[],"mappings":"","sourcesContent":["import type { RpcServiceRequestable } from './rpc-service-requestable';\n\n/**\n * The interface for a service class responsible for making a request to an RPC\n * endpoint or a group of RPC endpoints.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type AbstractRpcService = RpcServiceRequestable & {\n  /**\n   * The URL of the RPC endpoint.\n   */\n  endpointUrl: URL;\n};\n"]}
+{"version":3,"file":"abstract-rpc-service.mjs","sourceRoot":"","sources":["../../src/rpc-service/abstract-rpc-service.ts"],"names":[],"mappings":"","sourcesContent":["import type { RpcServiceRequestable } from './rpc-service-requestable.js';\n\n/**\n * The interface for a service class responsible for making a request to an RPC\n * endpoint or a group of RPC endpoints.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type AbstractRpcService = RpcServiceRequestable & {\n  /**\n   * The URL of the RPC endpoint.\n   */\n  endpointUrl: URL;\n};\n"]}

dist/rpc-service/rpc-service-chain.cjs

@@ -17,5 +17,5 @@ "use strict";
 const controller_utils_1 = require("@metamask/controller-utils");
-const logger_1 = require("../logger.cjs");
-const rpc_service_1 = require("./rpc-service.cjs");
-const log = (0, logger_1.createModuleLogger)(logger_1.projectLogger, 'RpcServiceChain');
+const logger_js_1 = require("../logger.cjs");
+const rpc_service_js_1 = require("./rpc-service.cjs");
+const log = (0, logger_js_1.createModuleLogger)(logger_js_1.projectLogger, 'RpcServiceChain');
 /**
@@ -69,3 +69,3 @@ * Statuses that the RPC service chain can be in.
         _RpcServiceChain_status.set(this, void 0);
-        __classPrivateFieldSet(this, _RpcServiceChain_services, rpcServiceConfigurations.map((rpcServiceConfiguration) => new rpc_service_1.RpcService(rpcServiceConfiguration)), "f");
+        __classPrivateFieldSet(this, _RpcServiceChain_services, rpcServiceConfigurations.map((rpcServiceConfiguration) => new rpc_service_js_1.RpcService(rpcServiceConfiguration)), "f");
         __classPrivateFieldSet(this, _RpcServiceChain_primaryService, __classPrivateFieldGet(this, _RpcServiceChain_services, "f")[0], "f");
@@ -72,0 +72,0 @@ __classPrivateFieldSet(this, _RpcServiceChain_status, STATUSES.Unknown, "f");

dist/rpc-service/rpc-service-chain.cjs.map

@@ -1,1 +0,1 @@
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{\n  CircuitState,\n  CockatielEventEmitter,\n} from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { IDisposable } from 'cockatiel';\n\nimport { projectLogger, createModuleLogger } from '../logger';\nimport { RpcService } from './rpc-service';\nimport type { RpcServiceOptions } from './rpc-service';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\nconst log = createModuleLogger(projectLogger, 'RpcServiceChain');\n\n/**\n * Statuses that the RPC service chain can be in.\n */\nconst STATUSES = {\n  Available: 'available',\n  Degraded: 'degraded',\n  Unknown: 'unknown',\n  Unavailable: 'unavailable',\n} as const;\n\n/**\n * Statuses that the RPC service chain can be in.\n */\ntype Status = (typeof STATUSES)[keyof typeof STATUSES];\n\n/**\n * This class constructs and manages requests to a chain of RpcService objects\n * which represent RPC endpoints with which to access a particular network. The\n * first service in the chain is intended to be the primary way of hitting the\n * network and the remaining services are used as failovers.\n */\nexport class RpcServiceChain {\n  /**\n   * The event emitter for the `onAvailable` event.\n   */\n  readonly #onAvailableEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onAvailable']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onBreak` event.\n   */\n  readonly #onBreakEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onBreak']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onDegraded` event.\n   */\n  readonly #onDegradedEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onDegraded']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The first RPC service that requests will be sent to.\n   */\n  readonly #primaryService: RpcService;\n\n  /**\n   * The RPC services in the chain.\n   */\n  readonly #services: RpcService[];\n\n  /**\n   * The status of the RPC service chain.\n   */\n  #status: Status;\n\n  /**\n   * Constructs a new RpcServiceChain object.\n   *\n   * @param rpcServiceConfigurations - The options for the RPC services\n   * that you want to construct. Each object in this array is the same as\n   * {@link RpcServiceOptions}.\n   */\n  constructor(\n    rpcServiceConfigurations: [RpcServiceOptions, ...RpcServiceOptions[]],\n  ) {\n    this.#services = rpcServiceConfigurations.map(\n      (rpcServiceConfiguration) => new RpcService(rpcServiceConfiguration),\n    );\n    this.#primaryService = this.#services[0];\n\n    this.#status = STATUSES.Unknown;\n    this.#onBreakEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >\n    >();\n\n    this.#onDegradedEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onDegraded((data) => {\n        if (this.#status !== STATUSES.Degraded) {\n          log('Updating status to \"degraded\"', data);\n          this.#status = STATUSES.Degraded;\n          const { endpointUrl, ...rest } = data;\n          this.#onDegradedEventEmitter.emit(rest);\n        }\n      });\n    }\n\n    this.#onAvailableEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onAvailable((data) => {\n        if (this.#status !== STATUSES.Available) {\n          log('Updating status to \"available\"', data);\n          this.#status = STATUSES.Available;\n          const { endpointUrl, ...rest } = data;\n          this.#onAvailableEventEmitter.emit(rest);\n        }\n      });\n    }\n  }\n\n  /**\n   * Calls the provided callback when any of the RPC services is retried.\n   *\n   * This is mainly useful for tests.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the event listener.\n   */\n  onServiceRetry(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onRetry'],\n      { primaryEndpointUrl: string }\n    >,\n  ): { dispose(): void } {\n    const disposables = this.#services.map((service) =>\n      service.onRetry((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback only when the maximum number of failed\n   * consecutive attempts to receive a 2xx response has been reached for all\n   * RPC services in the chain, and all services' underlying circuits have\n   * broken.\n   *\n   * The callback will not be called if a service's circuit breaks but its\n   * failover does not. Use `onServiceBreak` if you'd like a lower level of\n   * granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onBreakEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time when, for *any* of the RPC services\n   * in this chain, the maximum number of failed consecutive attempts to receive\n   * a 2xx response has been reached and the underlying circuit has broken. A\n   * more granular version of `onBreak`.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceBreak(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onBreak'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onBreak((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback if no requests have been initiated yet or\n   * all requests to RPC services in this chain have responded successfully in a\n   * timely fashion, and then one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * Also note this callback will only be called if the RPC service chain as a\n   * whole is in a \"degraded\" state, and will then only be called once (e.g., it\n   * will not be called if a failover service falls into a degraded state, then\n   * the primary comes back online, but it is slow). Use `onServiceDegraded` if\n   * you'd like a lower level of granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onDegraded(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onDegradedEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * This is a more granular version of `onDegraded`. The callback will be\n   * called for each slow request to an RPC service. It may also be called again\n   * if a failover service falls into a degraded state, then the primary comes\n   * back online, but it is slow.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onDegraded'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onDegraded((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback in one of the following two conditions:\n   *\n   * 1. The first time that a 2xx request is made to any of the RPC services in\n   * this chain.\n   * 2. When requests to any the failover RPC services in this chain were\n   * failing such that they were degraded or their underyling circuits broke,\n   * but the first request to the primary succeeds again.\n   *\n   * Note this callback will only be called if the RPC service chain as a whole\n   * is in an \"available\" state.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onAvailable(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onAvailableEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>> & {\n      method: 'eth_getBlockByNumber';\n    },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    // Start with the primary (first) service and switch to failovers as the\n    // need arises. This is a bit confusing, so keep reading for more on how\n    // this works.\n\n    let availableServiceIndex: number | undefined;\n    let response: JsonRpcResponse<Result> | undefined;\n\n    for (const [i, service] of this.#services.entries()) {\n      log(`Trying service #${i + 1}...`);\n      const previousCircuitState = service.getCircuitState();\n\n      try {\n        // Try making the request through the service.\n        response = await service.request<Params, Result>(\n          jsonRpcRequest,\n          fetchOptions,\n        );\n        log('Service successfully received request.');\n        availableServiceIndex = i;\n        break;\n      } catch (error) {\n        // Oops, that didn't work.\n        // Capture this error so that we can handle it later.\n\n        const { lastError } = service;\n        const isCircuitOpen = service.getCircuitState() === CircuitState.Open;\n\n        log('Service failed! error =', error, 'lastError = ', lastError);\n\n        if (isCircuitOpen) {\n          if (i < this.#services.length - 1) {\n            log(\n              \"This service's circuit is open. Proceeding to next service...\",\n            );\n            continue;\n          }\n\n          if (\n            previousCircuitState !== CircuitState.Open &&\n            this.#status !== STATUSES.Unavailable &&\n            lastError !== undefined\n          ) {\n            // If the service's circuit just broke and it's the last one in the\n            // chain, then trigger the onBreak event. (But if for some reason we\n            // have already done this, then don't do it.)\n            log(\n              'This service\\'s circuit just opened and it is the last service. Updating status to \"unavailable\" and triggering onBreak.',\n            );\n            this.#status = STATUSES.Unavailable;\n            this.#onBreakEventEmitter.emit({\n              error: lastError,\n            });\n          }\n        }\n\n        // The service failed, and we throw whatever the error is. The calling\n        // code can try again if it so desires.\n        log(\n          `${isCircuitOpen ? '' : \"This service's circuit is closed. \"}Re-throwing error.`,\n        );\n        throw error;\n      }\n    }\n\n    if (response) {\n      // If one of the services is available, reset all of the circuits of the\n      // following services. If we didn't do this and the service became\n      // unavailable in the future, and any of the failovers' circuits were\n      // open (due to previous failures), we would receive a \"circuit broken\"\n      // error when we attempted to divert traffic to the failovers again.\n      //\n      if (availableServiceIndex !== undefined) {\n        for (const [i, service] of [...this.#services.entries()].slice(\n          availableServiceIndex + 1,\n        )) {\n          log(`Resetting policy for service #${i + 1}.`);\n          service.resetPolicy();\n        }\n      }\n\n      return response;\n    }\n\n    // The only way we can end up here is if there are no services to loop over.\n    // That is not possible due to the types on the constructor, but TypeScript\n    // doesn't know this, so we have to appease it.\n    throw new Error('Nothing to return');\n  }\n}\n"]}
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{\n  CircuitState,\n  CockatielEventEmitter,\n} from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { IDisposable } from 'cockatiel';\n\nimport { projectLogger, createModuleLogger } from '../logger.js';\nimport { RpcService } from './rpc-service.js';\nimport type { RpcServiceOptions } from './rpc-service.js';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared.js';\n\nconst log = createModuleLogger(projectLogger, 'RpcServiceChain');\n\n/**\n * Statuses that the RPC service chain can be in.\n */\nconst STATUSES = {\n  Available: 'available',\n  Degraded: 'degraded',\n  Unknown: 'unknown',\n  Unavailable: 'unavailable',\n} as const;\n\n/**\n * Statuses that the RPC service chain can be in.\n */\ntype Status = (typeof STATUSES)[keyof typeof STATUSES];\n\n/**\n * This class constructs and manages requests to a chain of RpcService objects\n * which represent RPC endpoints with which to access a particular network. The\n * first service in the chain is intended to be the primary way of hitting the\n * network and the remaining services are used as failovers.\n */\nexport class RpcServiceChain {\n  /**\n   * The event emitter for the `onAvailable` event.\n   */\n  readonly #onAvailableEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onAvailable']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onBreak` event.\n   */\n  readonly #onBreakEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onBreak']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onDegraded` event.\n   */\n  readonly #onDegradedEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onDegraded']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The first RPC service that requests will be sent to.\n   */\n  readonly #primaryService: RpcService;\n\n  /**\n   * The RPC services in the chain.\n   */\n  readonly #services: RpcService[];\n\n  /**\n   * The status of the RPC service chain.\n   */\n  #status: Status;\n\n  /**\n   * Constructs a new RpcServiceChain object.\n   *\n   * @param rpcServiceConfigurations - The options for the RPC services\n   * that you want to construct. Each object in this array is the same as\n   * {@link RpcServiceOptions}.\n   */\n  constructor(\n    rpcServiceConfigurations: [RpcServiceOptions, ...RpcServiceOptions[]],\n  ) {\n    this.#services = rpcServiceConfigurations.map(\n      (rpcServiceConfiguration) => new RpcService(rpcServiceConfiguration),\n    );\n    this.#primaryService = this.#services[0];\n\n    this.#status = STATUSES.Unknown;\n    this.#onBreakEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >\n    >();\n\n    this.#onDegradedEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onDegraded((data) => {\n        if (this.#status !== STATUSES.Degraded) {\n          log('Updating status to \"degraded\"', data);\n          this.#status = STATUSES.Degraded;\n          const { endpointUrl, ...rest } = data;\n          this.#onDegradedEventEmitter.emit(rest);\n        }\n      });\n    }\n\n    this.#onAvailableEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onAvailable((data) => {\n        if (this.#status !== STATUSES.Available) {\n          log('Updating status to \"available\"', data);\n          this.#status = STATUSES.Available;\n          const { endpointUrl, ...rest } = data;\n          this.#onAvailableEventEmitter.emit(rest);\n        }\n      });\n    }\n  }\n\n  /**\n   * Calls the provided callback when any of the RPC services is retried.\n   *\n   * This is mainly useful for tests.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the event listener.\n   */\n  onServiceRetry(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onRetry'],\n      { primaryEndpointUrl: string }\n    >,\n  ): { dispose(): void } {\n    const disposables = this.#services.map((service) =>\n      service.onRetry((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback only when the maximum number of failed\n   * consecutive attempts to receive a 2xx response has been reached for all\n   * RPC services in the chain, and all services' underlying circuits have\n   * broken.\n   *\n   * The callback will not be called if a service's circuit breaks but its\n   * failover does not. Use `onServiceBreak` if you'd like a lower level of\n   * granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onBreakEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time when, for *any* of the RPC services\n   * in this chain, the maximum number of failed consecutive attempts to receive\n   * a 2xx response has been reached and the underlying circuit has broken. A\n   * more granular version of `onBreak`.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceBreak(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onBreak'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onBreak((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback if no requests have been initiated yet or\n   * all requests to RPC services in this chain have responded successfully in a\n   * timely fashion, and then one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * Also note this callback will only be called if the RPC service chain as a\n   * whole is in a \"degraded\" state, and will then only be called once (e.g., it\n   * will not be called if a failover service falls into a degraded state, then\n   * the primary comes back online, but it is slow). Use `onServiceDegraded` if\n   * you'd like a lower level of granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onDegraded(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onDegradedEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * This is a more granular version of `onDegraded`. The callback will be\n   * called for each slow request to an RPC service. It may also be called again\n   * if a failover service falls into a degraded state, then the primary comes\n   * back online, but it is slow.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onDegraded'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onDegraded((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback in one of the following two conditions:\n   *\n   * 1. The first time that a 2xx request is made to any of the RPC services in\n   * this chain.\n   * 2. When requests to any the failover RPC services in this chain were\n   * failing such that they were degraded or their underyling circuits broke,\n   * but the first request to the primary succeeds again.\n   *\n   * Note this callback will only be called if the RPC service chain as a whole\n   * is in an \"available\" state.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onAvailable(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onAvailableEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>> & {\n      method: 'eth_getBlockByNumber';\n    },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    // Start with the primary (first) service and switch to failovers as the\n    // need arises. This is a bit confusing, so keep reading for more on how\n    // this works.\n\n    let availableServiceIndex: number | undefined;\n    let response: JsonRpcResponse<Result> | undefined;\n\n    for (const [i, service] of this.#services.entries()) {\n      log(`Trying service #${i + 1}...`);\n      const previousCircuitState = service.getCircuitState();\n\n      try {\n        // Try making the request through the service.\n        response = await service.request<Params, Result>(\n          jsonRpcRequest,\n          fetchOptions,\n        );\n        log('Service successfully received request.');\n        availableServiceIndex = i;\n        break;\n      } catch (error) {\n        // Oops, that didn't work.\n        // Capture this error so that we can handle it later.\n\n        const { lastError } = service;\n        const isCircuitOpen = service.getCircuitState() === CircuitState.Open;\n\n        log('Service failed! error =', error, 'lastError = ', lastError);\n\n        if (isCircuitOpen) {\n          if (i < this.#services.length - 1) {\n            log(\n              \"This service's circuit is open. Proceeding to next service...\",\n            );\n            continue;\n          }\n\n          if (\n            previousCircuitState !== CircuitState.Open &&\n            this.#status !== STATUSES.Unavailable &&\n            lastError !== undefined\n          ) {\n            // If the service's circuit just broke and it's the last one in the\n            // chain, then trigger the onBreak event. (But if for some reason we\n            // have already done this, then don't do it.)\n            log(\n              'This service\\'s circuit just opened and it is the last service. Updating status to \"unavailable\" and triggering onBreak.',\n            );\n            this.#status = STATUSES.Unavailable;\n            this.#onBreakEventEmitter.emit({\n              error: lastError,\n            });\n          }\n        }\n\n        // The service failed, and we throw whatever the error is. The calling\n        // code can try again if it so desires.\n        log(\n          `${isCircuitOpen ? '' : \"This service's circuit is closed. \"}Re-throwing error.`,\n        );\n        throw error;\n      }\n    }\n\n    if (response) {\n      // If one of the services is available, reset all of the circuits of the\n      // following services. If we didn't do this and the service became\n      // unavailable in the future, and any of the failovers' circuits were\n      // open (due to previous failures), we would receive a \"circuit broken\"\n      // error when we attempted to divert traffic to the failovers again.\n      //\n      if (availableServiceIndex !== undefined) {\n        for (const [i, service] of [...this.#services.entries()].slice(\n          availableServiceIndex + 1,\n        )) {\n          log(`Resetting policy for service #${i + 1}.`);\n          service.resetPolicy();\n        }\n      }\n\n      return response;\n    }\n\n    // The only way we can end up here is if there are no services to loop over.\n    // That is not possible due to the types on the constructor, but TypeScript\n    // doesn't know this, so we have to appease it.\n    throw new Error('Nothing to return');\n  }\n}\n"]}

dist/rpc-service/rpc-service-chain.d.cts.map

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dist/rpc-service/rpc-service-chain.d.mts.map

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dist/rpc-service/rpc-service-chain.mjs.map

@@ -1,1 +0,1 @@
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{\n  CircuitState,\n  CockatielEventEmitter,\n} from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { IDisposable } from 'cockatiel';\n\nimport { projectLogger, createModuleLogger } from '../logger';\nimport { RpcService } from './rpc-service';\nimport type { RpcServiceOptions } from './rpc-service';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\nconst log = createModuleLogger(projectLogger, 'RpcServiceChain');\n\n/**\n * Statuses that the RPC service chain can be in.\n */\nconst STATUSES = {\n  Available: 'available',\n  Degraded: 'degraded',\n  Unknown: 'unknown',\n  Unavailable: 'unavailable',\n} as const;\n\n/**\n * Statuses that the RPC service chain can be in.\n */\ntype Status = (typeof STATUSES)[keyof typeof STATUSES];\n\n/**\n * This class constructs and manages requests to a chain of RpcService objects\n * which represent RPC endpoints with which to access a particular network. The\n * first service in the chain is intended to be the primary way of hitting the\n * network and the remaining services are used as failovers.\n */\nexport class RpcServiceChain {\n  /**\n   * The event emitter for the `onAvailable` event.\n   */\n  readonly #onAvailableEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onAvailable']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onBreak` event.\n   */\n  readonly #onBreakEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onBreak']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onDegraded` event.\n   */\n  readonly #onDegradedEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onDegraded']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The first RPC service that requests will be sent to.\n   */\n  readonly #primaryService: RpcService;\n\n  /**\n   * The RPC services in the chain.\n   */\n  readonly #services: RpcService[];\n\n  /**\n   * The status of the RPC service chain.\n   */\n  #status: Status;\n\n  /**\n   * Constructs a new RpcServiceChain object.\n   *\n   * @param rpcServiceConfigurations - The options for the RPC services\n   * that you want to construct. Each object in this array is the same as\n   * {@link RpcServiceOptions}.\n   */\n  constructor(\n    rpcServiceConfigurations: [RpcServiceOptions, ...RpcServiceOptions[]],\n  ) {\n    this.#services = rpcServiceConfigurations.map(\n      (rpcServiceConfiguration) => new RpcService(rpcServiceConfiguration),\n    );\n    this.#primaryService = this.#services[0];\n\n    this.#status = STATUSES.Unknown;\n    this.#onBreakEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >\n    >();\n\n    this.#onDegradedEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onDegraded((data) => {\n        if (this.#status !== STATUSES.Degraded) {\n          log('Updating status to \"degraded\"', data);\n          this.#status = STATUSES.Degraded;\n          const { endpointUrl, ...rest } = data;\n          this.#onDegradedEventEmitter.emit(rest);\n        }\n      });\n    }\n\n    this.#onAvailableEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onAvailable((data) => {\n        if (this.#status !== STATUSES.Available) {\n          log('Updating status to \"available\"', data);\n          this.#status = STATUSES.Available;\n          const { endpointUrl, ...rest } = data;\n          this.#onAvailableEventEmitter.emit(rest);\n        }\n      });\n    }\n  }\n\n  /**\n   * Calls the provided callback when any of the RPC services is retried.\n   *\n   * This is mainly useful for tests.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the event listener.\n   */\n  onServiceRetry(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onRetry'],\n      { primaryEndpointUrl: string }\n    >,\n  ): { dispose(): void } {\n    const disposables = this.#services.map((service) =>\n      service.onRetry((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback only when the maximum number of failed\n   * consecutive attempts to receive a 2xx response has been reached for all\n   * RPC services in the chain, and all services' underlying circuits have\n   * broken.\n   *\n   * The callback will not be called if a service's circuit breaks but its\n   * failover does not. Use `onServiceBreak` if you'd like a lower level of\n   * granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onBreakEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time when, for *any* of the RPC services\n   * in this chain, the maximum number of failed consecutive attempts to receive\n   * a 2xx response has been reached and the underlying circuit has broken. A\n   * more granular version of `onBreak`.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceBreak(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onBreak'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onBreak((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback if no requests have been initiated yet or\n   * all requests to RPC services in this chain have responded successfully in a\n   * timely fashion, and then one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * Also note this callback will only be called if the RPC service chain as a\n   * whole is in a \"degraded\" state, and will then only be called once (e.g., it\n   * will not be called if a failover service falls into a degraded state, then\n   * the primary comes back online, but it is slow). Use `onServiceDegraded` if\n   * you'd like a lower level of granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onDegraded(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onDegradedEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * This is a more granular version of `onDegraded`. The callback will be\n   * called for each slow request to an RPC service. It may also be called again\n   * if a failover service falls into a degraded state, then the primary comes\n   * back online, but it is slow.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onDegraded'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onDegraded((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback in one of the following two conditions:\n   *\n   * 1. The first time that a 2xx request is made to any of the RPC services in\n   * this chain.\n   * 2. When requests to any the failover RPC services in this chain were\n   * failing such that they were degraded or their underyling circuits broke,\n   * but the first request to the primary succeeds again.\n   *\n   * Note this callback will only be called if the RPC service chain as a whole\n   * is in an \"available\" state.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onAvailable(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onAvailableEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>> & {\n      method: 'eth_getBlockByNumber';\n    },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    // Start with the primary (first) service and switch to failovers as the\n    // need arises. This is a bit confusing, so keep reading for more on how\n    // this works.\n\n    let availableServiceIndex: number | undefined;\n    let response: JsonRpcResponse<Result> | undefined;\n\n    for (const [i, service] of this.#services.entries()) {\n      log(`Trying service #${i + 1}...`);\n      const previousCircuitState = service.getCircuitState();\n\n      try {\n        // Try making the request through the service.\n        response = await service.request<Params, Result>(\n          jsonRpcRequest,\n          fetchOptions,\n        );\n        log('Service successfully received request.');\n        availableServiceIndex = i;\n        break;\n      } catch (error) {\n        // Oops, that didn't work.\n        // Capture this error so that we can handle it later.\n\n        const { lastError } = service;\n        const isCircuitOpen = service.getCircuitState() === CircuitState.Open;\n\n        log('Service failed! error =', error, 'lastError = ', lastError);\n\n        if (isCircuitOpen) {\n          if (i < this.#services.length - 1) {\n            log(\n              \"This service's circuit is open. Proceeding to next service...\",\n            );\n            continue;\n          }\n\n          if (\n            previousCircuitState !== CircuitState.Open &&\n            this.#status !== STATUSES.Unavailable &&\n            lastError !== undefined\n          ) {\n            // If the service's circuit just broke and it's the last one in the\n            // chain, then trigger the onBreak event. (But if for some reason we\n            // have already done this, then don't do it.)\n            log(\n              'This service\\'s circuit just opened and it is the last service. Updating status to \"unavailable\" and triggering onBreak.',\n            );\n            this.#status = STATUSES.Unavailable;\n            this.#onBreakEventEmitter.emit({\n              error: lastError,\n            });\n          }\n        }\n\n        // The service failed, and we throw whatever the error is. The calling\n        // code can try again if it so desires.\n        log(\n          `${isCircuitOpen ? '' : \"This service's circuit is closed. \"}Re-throwing error.`,\n        );\n        throw error;\n      }\n    }\n\n    if (response) {\n      // If one of the services is available, reset all of the circuits of the\n      // following services. If we didn't do this and the service became\n      // unavailable in the future, and any of the failovers' circuits were\n      // open (due to previous failures), we would receive a \"circuit broken\"\n      // error when we attempted to divert traffic to the failovers again.\n      //\n      if (availableServiceIndex !== undefined) {\n        for (const [i, service] of [...this.#services.entries()].slice(\n          availableServiceIndex + 1,\n        )) {\n          log(`Resetting policy for service #${i + 1}.`);\n          service.resetPolicy();\n        }\n      }\n\n      return response;\n    }\n\n    // The only way we can end up here is if there are no services to loop over.\n    // That is not possible due to the types on the constructor, but TypeScript\n    // doesn't know this, so we have to appease it.\n    throw new Error('Nothing to return');\n  }\n}\n"]}
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manages requests to a chain of RpcService objects\n * which represent RPC endpoints with which to access a particular network. The\n * first service in the chain is intended to be the primary way of hitting the\n * network and the remaining services are used as failovers.\n */\nexport class RpcServiceChain {\n  /**\n   * The event emitter for the `onAvailable` event.\n   */\n  readonly #onAvailableEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onAvailable']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onBreak` event.\n   */\n  readonly #onBreakEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onBreak']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The event emitter for the `onDegraded` event.\n   */\n  readonly #onDegradedEventEmitter: CockatielEventEmitter<\n    ExcludeCockatielEventData<\n      ExtractCockatielEventData<RpcService['onDegraded']>,\n      'endpointUrl'\n    >\n  >;\n\n  /**\n   * The first RPC service that requests will be sent to.\n   */\n  readonly #primaryService: RpcService;\n\n  /**\n   * The RPC services in the chain.\n   */\n  readonly #services: RpcService[];\n\n  /**\n   * The status of the RPC service chain.\n   */\n  #status: Status;\n\n  /**\n   * Constructs a new RpcServiceChain object.\n   *\n   * @param rpcServiceConfigurations - The options for the RPC services\n   * that you want to construct. Each object in this array is the same as\n   * {@link RpcServiceOptions}.\n   */\n  constructor(\n    rpcServiceConfigurations: [RpcServiceOptions, ...RpcServiceOptions[]],\n  ) {\n    this.#services = rpcServiceConfigurations.map(\n      (rpcServiceConfiguration) => new RpcService(rpcServiceConfiguration),\n    );\n    this.#primaryService = this.#services[0];\n\n    this.#status = STATUSES.Unknown;\n    this.#onBreakEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >\n    >();\n\n    this.#onDegradedEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onDegraded((data) => {\n        if (this.#status !== STATUSES.Degraded) {\n          log('Updating status to \"degraded\"', data);\n          this.#status = STATUSES.Degraded;\n          const { endpointUrl, ...rest } = data;\n          this.#onDegradedEventEmitter.emit(rest);\n        }\n      });\n    }\n\n    this.#onAvailableEventEmitter = new CockatielEventEmitter<\n      ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >\n    >();\n    for (const service of this.#services) {\n      service.onAvailable((data) => {\n        if (this.#status !== STATUSES.Available) {\n          log('Updating status to \"available\"', data);\n          this.#status = STATUSES.Available;\n          const { endpointUrl, ...rest } = data;\n          this.#onAvailableEventEmitter.emit(rest);\n        }\n      });\n    }\n  }\n\n  /**\n   * Calls the provided callback when any of the RPC services is retried.\n   *\n   * This is mainly useful for tests.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the event listener.\n   */\n  onServiceRetry(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onRetry'],\n      { primaryEndpointUrl: string }\n    >,\n  ): { dispose(): void } {\n    const disposables = this.#services.map((service) =>\n      service.onRetry((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback only when the maximum number of failed\n   * consecutive attempts to receive a 2xx response has been reached for all\n   * RPC services in the chain, and all services' underlying circuits have\n   * broken.\n   *\n   * The callback will not be called if a service's circuit breaks but its\n   * failover does not. Use `onServiceBreak` if you'd like a lower level of\n   * granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onBreak']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onBreakEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time when, for *any* of the RPC services\n   * in this chain, the maximum number of failed consecutive attempts to receive\n   * a 2xx response has been reached and the underlying circuit has broken. A\n   * more granular version of `onBreak`.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceBreak(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onBreak'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onBreak((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback if no requests have been initiated yet or\n   * all requests to RPC services in this chain have responded successfully in a\n   * timely fashion, and then one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * Also note this callback will only be called if the RPC service chain as a\n   * whole is in a \"degraded\" state, and will then only be called once (e.g., it\n   * will not be called if a failover service falls into a degraded state, then\n   * the primary comes back online, but it is slow). Use `onServiceDegraded` if\n   * you'd like a lower level of granularity.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onDegraded(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onDegraded']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onDegradedEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Calls the provided callback each time one of the two conditions apply:\n   *\n   * 1. When a retriable error is encountered making a request to an RPC\n   * service, and the request is retried until a set maximum is reached.\n   * 2. When a RPC service responds successfully, but the request takes longer\n   * than a set number of seconds to complete.\n   *\n   * Note that the callback will be called even if there are local connectivity\n   * issues which prevent requests from being initiated. This is intentional.\n   *\n   * This is a more granular version of `onDegraded`. The callback will be\n   * called for each slow request to an RPC service. It may also be called again\n   * if a failover service falls into a degraded state, then the primary comes\n   * back online, but it is slow.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onServiceDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      RpcService['onDegraded'],\n      { primaryEndpointUrl: string }\n    >,\n  ): IDisposable {\n    const disposables = this.#services.map((service) =>\n      service.onDegraded((data) => {\n        listener({\n          ...data,\n          primaryEndpointUrl: this.#primaryService.endpointUrl.toString(),\n        });\n      }),\n    );\n\n    return {\n      dispose(): void {\n        disposables.forEach((disposable) => disposable.dispose());\n      },\n    };\n  }\n\n  /**\n   * Calls the provided callback in one of the following two conditions:\n   *\n   * 1. The first time that a 2xx request is made to any of the RPC services in\n   * this chain.\n   * 2. When requests to any the failover RPC services in this chain were\n   * failing such that they were degraded or their underyling circuits broke,\n   * but the first request to the primary succeeds again.\n   *\n   * Note this callback will only be called if the RPC service chain as a whole\n   * is in an \"available\" state.\n   *\n   * @param listener - The callback to be called.\n   * @returns An object with a `dispose` method which can be used to unregister\n   * the callback.\n   */\n  onAvailable(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtractCockatielEventData<RpcService['onAvailable']>,\n        'endpointUrl'\n      >,\n    ) => void,\n  ): IDisposable {\n    return this.#onAvailableEventEmitter.addListener(listener);\n  }\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>> & {\n      method: 'eth_getBlockByNumber';\n    },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Uses the RPC services in the chain to make a request, using each service\n   * after the first as a fallback to the previous one as necessary.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws A 401 error if the response status is 401.\n   * @throws A \"rate limiting\" error if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" error if the response status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client error (-32100) for any other 4xx status codes.\n   * @throws A \"parse\" error if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    // Start with the primary (first) service and switch to failovers as the\n    // need arises. This is a bit confusing, so keep reading for more on how\n    // this works.\n\n    let availableServiceIndex: number | undefined;\n    let response: JsonRpcResponse<Result> | undefined;\n\n    for (const [i, service] of this.#services.entries()) {\n      log(`Trying service #${i + 1}...`);\n      const previousCircuitState = service.getCircuitState();\n\n      try {\n        // Try making the request through the service.\n        response = await service.request<Params, Result>(\n          jsonRpcRequest,\n          fetchOptions,\n        );\n        log('Service successfully received request.');\n        availableServiceIndex = i;\n        break;\n      } catch (error) {\n        // Oops, that didn't work.\n        // Capture this error so that we can handle it later.\n\n        const { lastError } = service;\n        const isCircuitOpen = service.getCircuitState() === CircuitState.Open;\n\n        log('Service failed! error =', error, 'lastError = ', lastError);\n\n        if (isCircuitOpen) {\n          if (i < this.#services.length - 1) {\n            log(\n              \"This service's circuit is open. Proceeding to next service...\",\n            );\n            continue;\n          }\n\n          if (\n            previousCircuitState !== CircuitState.Open &&\n            this.#status !== STATUSES.Unavailable &&\n            lastError !== undefined\n          ) {\n            // If the service's circuit just broke and it's the last one in the\n            // chain, then trigger the onBreak event. (But if for some reason we\n            // have already done this, then don't do it.)\n            log(\n              'This service\\'s circuit just opened and it is the last service. Updating status to \"unavailable\" and triggering onBreak.',\n            );\n            this.#status = STATUSES.Unavailable;\n            this.#onBreakEventEmitter.emit({\n              error: lastError,\n            });\n          }\n        }\n\n        // The service failed, and we throw whatever the error is. The calling\n        // code can try again if it so desires.\n        log(\n          `${isCircuitOpen ? '' : \"This service's circuit is closed. \"}Re-throwing error.`,\n        );\n        throw error;\n      }\n    }\n\n    if (response) {\n      // If one of the services is available, reset all of the circuits of the\n      // following services. If we didn't do this and the service became\n      // unavailable in the future, and any of the failovers' circuits were\n      // open (due to previous failures), we would receive a \"circuit broken\"\n      // error when we attempted to divert traffic to the failovers again.\n      //\n      if (availableServiceIndex !== undefined) {\n        for (const [i, service] of [...this.#services.entries()].slice(\n          availableServiceIndex + 1,\n        )) {\n          log(`Resetting policy for service #${i + 1}.`);\n          service.resetPolicy();\n        }\n      }\n\n      return response;\n    }\n\n    // The only way we can end up here is if there are no services to loop over.\n    // That is not possible due to the types on the constructor, but TypeScript\n    // doesn't know this, so we have to appease it.\n    throw new Error('Nothing to return');\n  }\n}\n"]}

dist/rpc-service/rpc-service-requestable.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"rpc-service-requestable.cjs","sourceRoot":"","sources":["../../src/rpc-service/rpc-service-requestable.ts"],"names":[],"mappings":"","sourcesContent":["import type { ServicePolicy } from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\n\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\n/**\n * The interface for a service class responsible for making a request to a\n * target, whether that is a single RPC endpoint or an RPC endpoint in an RPC\n * service chain.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type RpcServiceRequestable = {\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']>;\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      { endpointUrl: string; rpcMethodName: string }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']>;\n\n  /**\n   * Makes a request to the target.\n   */\n  request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result | null>>;\n};\n"]}
+{"version":3,"file":"rpc-service-requestable.cjs","sourceRoot":"","sources":["../../src/rpc-service/rpc-service-requestable.ts"],"names":[],"mappings":"","sourcesContent":["import type { ServicePolicy } from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\n\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared.js';\n\n/**\n * The interface for a service class responsible for making a request to a\n * target, whether that is a single RPC endpoint or an RPC endpoint in an RPC\n * service chain.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type RpcServiceRequestable = {\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']>;\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      { endpointUrl: string; rpcMethodName: string }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']>;\n\n  /**\n   * Makes a request to the target.\n   */\n  request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result | null>>;\n};\n"]}

dist/rpc-service/rpc-service-requestable.d.cts.map

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dist/rpc-service/rpc-service-requestable.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"rpc-service-requestable.mjs","sourceRoot":"","sources":["../../src/rpc-service/rpc-service-requestable.ts"],"names":[],"mappings":"","sourcesContent":["import type { ServicePolicy } from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\n\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\n/**\n * The interface for a service class responsible for making a request to a\n * target, whether that is a single RPC endpoint or an RPC endpoint in an RPC\n * service chain.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type RpcServiceRequestable = {\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']>;\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      { endpointUrl: string; rpcMethodName: string }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']>;\n\n  /**\n   * Makes a request to the target.\n   */\n  request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result | null>>;\n};\n"]}
+{"version":3,"file":"rpc-service-requestable.mjs","sourceRoot":"","sources":["../../src/rpc-service/rpc-service-requestable.ts"],"names":[],"mappings":"","sourcesContent":["import type { ServicePolicy } from '@metamask/controller-utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\n\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared.js';\n\n/**\n * The interface for a service class responsible for making a request to a\n * target, whether that is a single RPC endpoint or an RPC endpoint in an RPC\n * service chain.\n *\n * @deprecated Don't use this interface (it will be removed in an upcoming major\n * version). If you need to take an \"RPC-service-like\" argument, it's best to\n * declare which properties you're interested in rather than accepting the\n * entire RPC service interface.\n */\nexport type RpcServiceRequestable = {\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']>;\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      { endpointUrl: string; rpcMethodName: string }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']>;\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']>;\n\n  /**\n   * Makes a request to the target.\n   */\n  request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result | null>>;\n};\n"]}

dist/rpc-service/rpc-service.cjs

@@ -24,4 +24,4 @@ "use strict";
 const deepmerge_1 = __importDefault(require("deepmerge"));
-const logger_1 = require("../logger.cjs");
-const log = (0, logger_1.createModuleLogger)(logger_1.projectLogger, 'RpcService');
+const logger_js_1 = require("../logger.cjs");
+const log = (0, logger_js_1.createModuleLogger)(logger_js_1.projectLogger, 'RpcService');
 /**
@@ -28,0 +28,0 @@ * The maximum number of times that a failing service should be re-run before

dist/rpc-service/rpc-service.cjs.map

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type {\n  CreateServicePolicyOptions,\n  ServicePolicy,\n} from '@metamask/controller-utils';\nimport {\n  BrokenCircuitError,\n  HttpError,\n  createServicePolicy,\n  handleWhen,\n} from '@metamask/controller-utils';\nimport { JsonRpcError, rpcErrors } from '@metamask/rpc-errors';\nimport { Duration, getErrorMessage, hasProperty } from '@metamask/utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { CircuitState } from 'cockatiel';\nimport deepmerge from 'deepmerge';\nimport type { Logger } from 'loglevel';\n\nimport { projectLogger, createModuleLogger } from '../logger';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\n/**\n * Options for the RpcService constructor with some properties omitted and made optional as they have defaults.\n */\nexport type RpcServiceOptionsWithDefaults = Omit<\n  RpcServiceOptions,\n  'failoverService' | 'endpointUrl' | 'isOffline' | 'btoa' | 'fetch'\n> &\n  Partial<Pick<RpcServiceOptions, 'isOffline' | 'btoa' | 'fetch'>>;\n\n/**\n * Options for the RpcService constructor.\n */\nexport type RpcServiceOptions = {\n  /**\n   * A function that can be used to convert a binary string into a\n   * base64-encoded ASCII string. Used to encode authorization credentials.\n   */\n  btoa: typeof btoa;\n  /**\n   * The URL of the RPC endpoint to hit.\n   */\n  endpointUrl: URL | string;\n  /**\n   * A function that can be used to make an HTTP request. If your JavaScript\n   * environment supports `fetch` natively, you'll probably want to pass that;\n   * otherwise you can pass an equivalent (such as `fetch` via `node-fetch`).\n   */\n  fetch: typeof fetch;\n  /**\n   * A common set of options that will be used to make every request. Can be\n   * overridden on the request level (e.g. to add headers).\n   */\n  fetchOptions?: FetchOptions;\n  /**\n   * A `loglevel` logger.\n   */\n  logger?: Pick<Logger, 'warn'>;\n  /**\n   * Options to pass to `createServicePolicy`. Note that `retryFilterPolicy` and `isServiceFailure`\n   * are not accepted, as they are overwritten. See {@link createServicePolicy}.\n   */\n  policyOptions?: Omit<\n    CreateServicePolicyOptions,\n    'retryFilterPolicy' | 'isServiceFailure'\n  >;\n  /**\n   * A function that checks if the user is currently offline. If it returns true,\n   * connection errors will not be retried, preventing degraded and break\n   * callbacks from being triggered.\n   */\n  isOffline: () => boolean;\n};\n\nconst log = createModuleLogger(projectLogger, 'RpcService');\n\n/**\n * The maximum number of times that a failing service should be re-run before\n * giving up.\n *\n * Note: This is not used in production and should be removed.\n */\nexport const DEFAULT_MAX_RETRIES = 4;\n\n/**\n * The maximum number of times that the service is allowed to fail before\n * pausing further retries. This is set to a value such that if given a\n * service that continually fails, the policy needs to be executed 3 times\n * before further retries are paused.\n */\nexport const DEFAULT_MAX_CONSECUTIVE_FAILURES = (1 + DEFAULT_MAX_RETRIES) * 3;\n\n/**\n * The list of error messages that represent a failure to connect to the network.\n *\n * This list was derived from Sindre Sorhus's `is-network-error` package:\n * <https://github.com/sindresorhus/is-network-error/blob/7bbfa8be9482ce1427a21fbff60e3ee1650dd091/index.js>\n */\nexport const CONNECTION_ERRORS = [\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /network error/u,\n  },\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /Failed to fetch/u,\n  },\n  // Firefox\n  {\n    constructorName: 'TypeError',\n    pattern: /NetworkError when attempting to fetch resource\\./u,\n  },\n  // Safari 16\n  {\n    constructorName: 'TypeError',\n    pattern: /The Internet connection appears to be offline\\./u,\n  },\n  // Safari 17+\n  {\n    constructorName: 'TypeError',\n    pattern: /Load failed/u,\n  },\n  // `cross-fetch`\n  {\n    constructorName: 'TypeError',\n    pattern: /Network request failed/u,\n  },\n  // `node-fetch`\n  {\n    constructorName: 'FetchError',\n    pattern: /request to (.+) failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /fetch failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /terminated/u,\n  },\n];\n\n/**\n * Custom JSON-RPC error codes for specific cases.\n *\n * These should be moved to `@metamask/rpc-errors` eventually.\n */\nexport const CUSTOM_RPC_ERRORS = {\n  unauthorized: -32006,\n  httpClientError: -32080,\n} as const;\n\n/**\n * Determines whether the given error represents a failure to reach the network\n * after request parameters have been validated.\n *\n * This is somewhat difficult to verify because JavaScript engines (and in\n * some cases libraries) produce slightly different error messages for this\n * particular scenario, and we need to account for this.\n *\n * @param error - The error.\n * @returns True if the error indicates that the network cannot be connected to,\n * and false otherwise.\n */\nexport function isConnectionError(error: unknown): boolean {\n  if (!(typeof error === 'object' && error !== null && 'message' in error)) {\n    return false;\n  }\n\n  const { message } = error;\n\n  return (\n    typeof message === 'string' &&\n    !isNockError(message) &&\n    CONNECTION_ERRORS.some(({ constructorName, pattern }) => {\n      return (\n        error.constructor.name === constructorName && pattern.test(message)\n      );\n    })\n  );\n}\n\n/**\n * Determines whether the given error message refers to a Nock error.\n *\n * It's important that if we failed to mock a request in a test, the resulting\n * error does not cause the request to be retried so that we can see it right\n * away.\n *\n * @param message - The error message to test.\n * @returns True if the message indicates a missing Nock mock, false otherwise.\n */\nfunction isNockError(message: string): boolean {\n  return message.includes('Nock:');\n}\n\n/**\n * Determine whether the given error message indicates a failure to parse JSON.\n *\n * This is different in tests vs. implementation code because it may manifest as\n * a FetchError or a SyntaxError.\n *\n * @param error - The error object to test.\n * @returns True if the error indicates a JSON parse error, false otherwise.\n */\nexport function isJsonParseError(error: unknown): boolean {\n  return (\n    error instanceof SyntaxError ||\n    /invalid json/iu.test(getErrorMessage(error))\n  );\n}\n\n/**\n * Determines whether the given error represents a HTTP server error\n * (502, 503, or 504) that should be retried.\n *\n * @param error - The error object to test.\n * @returns True if the error has an httpStatus of 502, 503, or 504.\n */\nexport function isHttpServerError(error: Error): boolean {\n  return (\n    'httpStatus' in error &&\n    (error.httpStatus === 502 ||\n      error.httpStatus === 503 ||\n      error.httpStatus === 504)\n  );\n}\n\n/**\n * Determines whether the given error has a `code` property of `ETIMEDOUT`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ETIMEDOUT`.\n */\nexport function isTimeoutError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ETIMEDOUT';\n}\n\n/**\n * Determines whether the given error has a `code` property of `ECONNRESET`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ECONNRESET`.\n */\nexport function isConnectionResetError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ECONNRESET';\n}\n\n/**\n * Guarantees a URL, even given a string. This is useful for checking components\n * of that URL.\n *\n * @param endpointUrlOrUrlString - Either a URL object or a string that\n * represents the URL of an endpoint.\n * @returns A URL object.\n */\nfunction getNormalizedEndpointUrl(endpointUrlOrUrlString: URL | string): URL {\n  return endpointUrlOrUrlString instanceof URL\n    ? endpointUrlOrUrlString\n    : new URL(endpointUrlOrUrlString);\n}\n\n/**\n * Strips username and password from a URL.\n *\n * @param url - The URL to strip credentials from.\n * @returns A new URL object with credentials removed.\n */\nfunction stripCredentialsFromUrl(url: URL): URL {\n  const strippedUrl = new URL(url.toString());\n  strippedUrl.username = '';\n  strippedUrl.password = '';\n  return strippedUrl;\n}\n\nconst INFURA_NON_FAILURE_HTTP_STATUS_CODES = [400, 429];\n\n/**\n * Predicate function that determines if an error from Infura is treated as a service failure.\n *\n * @param error - The error.\n * @returns True if the error should be treated as a service policy failure. Most errors are treated like failures,\n * with the exception of certain HTTP status codes.\n */\nfunction isServiceFailureInfura(error: unknown): boolean {\n  if (\n    typeof error === 'object' &&\n    error !== null &&\n    hasProperty(error, 'httpStatus') &&\n    typeof error.httpStatus === 'number'\n  ) {\n    return !INFURA_NON_FAILURE_HTTP_STATUS_CODES.includes(error.httpStatus);\n  }\n\n  // If the error is not an object, or doesn't have a numeric httpStatus\n  // property, consider it a service failure (e.g., network errors, timeouts,\n  // etc.)\n  return true;\n}\n\n/**\n * This class is responsible for making a request to an endpoint that implements\n * the JSON-RPC protocol. It is designed to gracefully handle network and server\n * failures, retrying requests using exponential backoff. It also offers a hook\n * which can used to respond to slow requests.\n */\nexport class RpcService {\n  /**\n   * The URL of the RPC endpoint.\n   */\n  readonly endpointUrl: URL;\n\n  /**\n   * The last error that the retry policy captured (or `undefined` if the last\n   * execution of the service was successful).\n   */\n  lastError: Error | undefined;\n\n  /**\n   * The RPC method name of the current request being processed. This is passed\n   * to `onDegraded` event listeners.\n   *\n   * Initialised to `''` so the type is `string` throughout the event chain.\n   * The empty string is unreachable in practice because the method name is\n   * guaranteed to be set after the current request is completed but before\n   * any `onDegraded` callbacks are called.\n   */\n  #currentRpcMethodName = '';\n\n  /**\n   * The trace ID from the `X-Trace-Id` response header of the most recent\n   * request. Passed to `onDegraded` event listeners for debugging.\n   *\n   * `undefined` when no response has been received yet or when the response\n   * did not include the header.\n   */\n  #currentTraceId: string | undefined;\n\n  /**\n   * The function used to make an HTTP request.\n   */\n  readonly #fetch: typeof fetch;\n\n  /**\n   * A common set of options that the request options will extend.\n   */\n  readonly #fetchOptions: FetchOptions;\n\n  /**\n   * A `loglevel` logger.\n   */\n  readonly #logger: RpcServiceOptions['logger'];\n\n  /**\n   * The policy that wraps the request.\n   */\n  readonly #policy: ServicePolicy;\n\n  /**\n   * Constructs a new RpcService object.\n   *\n   * @param options - The options. See {@link RpcServiceOptions}.\n   */\n  constructor(options: RpcServiceOptions) {\n    const {\n      btoa: givenBtoa,\n      endpointUrl,\n      fetch: givenFetch,\n      logger,\n      fetchOptions = {},\n      policyOptions = {},\n      isOffline,\n    } = options;\n\n    this.#fetch = givenFetch;\n    const normalizedUrl = getNormalizedEndpointUrl(endpointUrl);\n    this.#fetchOptions = this.#getDefaultFetchOptions(\n      normalizedUrl,\n      fetchOptions,\n      givenBtoa,\n    );\n    this.endpointUrl = stripCredentialsFromUrl(normalizedUrl);\n    this.#logger = logger;\n\n    const isInfura = normalizedUrl.hostname.endsWith('.infura.io');\n\n    this.#policy = createServicePolicy({\n      maxRetries: DEFAULT_MAX_RETRIES,\n      maxConsecutiveFailures: DEFAULT_MAX_CONSECUTIVE_FAILURES,\n      ...policyOptions,\n      isServiceFailure: isInfura ? isServiceFailureInfura : undefined,\n      retryFilterPolicy: handleWhen((error) => {\n        // If user is offline, don't retry any errors\n        // This prevents degraded/break callbacks from being triggered\n        if (isOffline()) {\n          return false;\n        }\n\n        return (\n          // Ignore errors where the request failed to establish\n          isConnectionError(error) ||\n          // Ignore server sent HTML error pages or truncated JSON responses\n          isJsonParseError(error) ||\n          // Ignore server overload errors\n          isHttpServerError(error) ||\n          // Ignore timeout errors\n          isTimeoutError(error) ||\n          // Ignore connection reset errors\n          isConnectionResetError(error)\n        );\n      }),\n    });\n  }\n\n  /**\n   * Resets the underlying composite Cockatiel policy.\n   *\n   * This is useful in a collection of RpcServices where some act as failovers\n   * for others where you effectively want to invalidate the failovers when the\n   * primary recovers.\n   */\n  resetPolicy(): void {\n    this.#policy.reset();\n  }\n\n  /**\n   * @returns The state of the underlying circuit.\n   */\n  getCircuitState(): CircuitState {\n    return this.#policy.getCircuitState();\n  }\n\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']> {\n    return this.#policy.onRetry((data) => {\n      listener({ ...data, endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row, causing the underlying circuit to break.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']> {\n    return this.#policy.onBreak((data) => {\n      // `{ isolated: true }` is a special object that shows up when `isolate`\n      // is called on the circuit breaker. Usually `isolate` is used to hold the\n      // circuit open, but we (ab)use this method in `createServicePolicy` to\n      // reset the circuit breaker policy. When we do this, we don't want to\n      // call `onBreak` handlers, because then it causes\n      // `NetworkController:rpcEndpointUnavailable` and\n      // `NetworkController:rpcEndpointChainUnavailable` to be published. So we\n      // have to ignore that object here. The consequence is that `isolate`\n      // doesn't function the way it is intended, at least in the context of an\n      // RpcService. However, we are making a bet that we won't need to use it\n      // other than how we are already using it.\n      if (!('isolated' in data)) {\n        listener({\n          ...data,\n          endpointUrl: this.endpointUrl.toString(),\n        });\n      }\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      {\n        duration?: number;\n        endpointUrl: string;\n        rpcMethodName: string;\n        traceId?: string;\n      }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']> {\n    return this.#policy.onDegraded((data) => {\n      listener({\n        ...data,\n        endpointUrl: this.endpointUrl.toString(),\n        rpcMethodName: this.#currentRpcMethodName,\n        traceId: this.#currentTraceId,\n      });\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onAvailable} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']> {\n    return this.#policy.onAvailable(() => {\n      listener({ endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params> & { method: 'eth_getBlockByNumber' },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    // The request object may be frozen and must not be mutated.\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    const completeFetchOptions = this.#getCompleteFetchOptions(\n      jsonRpcRequest,\n      fetchOptions,\n    );\n    return await this.#executeAndProcessRequest<Result>(\n      completeFetchOptions,\n      jsonRpcRequest.method,\n    );\n  }\n\n  /**\n   * Constructs a default set of options to `fetch`.\n   *\n   * If a username and password are present in the URL, they are extracted to an\n   * Authorization header.\n   *\n   * @param endpointUrl - The endpoint URL.\n   * @param fetchOptions - The options to `fetch`.\n   * @param givenBtoa - An implementation of `btoa`.\n   * @returns The default fetch options.\n   */\n  #getDefaultFetchOptions(\n    endpointUrl: URL,\n    fetchOptions: FetchOptions,\n    givenBtoa: (stringToEncode: string) => string,\n  ): FetchOptions {\n    if (endpointUrl.username && endpointUrl.password) {\n      const authString = `${endpointUrl.username}:${endpointUrl.password}`;\n      const encodedCredentials = givenBtoa(authString);\n      return deepmerge(fetchOptions, {\n        headers: { Authorization: `Basic ${encodedCredentials}` },\n      });\n    }\n\n    return fetchOptions;\n  }\n\n  /**\n   * Constructs a final set of options to pass to `fetch`. Note that the method\n   * defaults to `post`, and the JSON-RPC request is automatically JSON-encoded.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request.\n   * @param fetchOptions - Custom `fetch` options.\n   * @returns The complete set of `fetch` options.\n   */\n  #getCompleteFetchOptions<Params extends JsonRpcParams>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions,\n  ): FetchOptions {\n    const defaultOptions = {\n      method: 'POST',\n      headers: {\n        Accept: 'application/json',\n        'Content-Type': 'application/json',\n      },\n    };\n    const mergedOptions = deepmerge(\n      defaultOptions,\n      deepmerge(this.#fetchOptions, fetchOptions),\n    );\n\n    const { id, jsonrpc, method, params } = jsonRpcRequest;\n    const body = JSON.stringify({\n      id,\n      jsonrpc,\n      method,\n      params,\n    });\n\n    return { ...mergedOptions, body };\n  }\n\n  /**\n   * Makes the request using the Cockatiel policy that this service creates.\n   *\n   * @param fetchOptions - The options for `fetch`; will be combined with the\n   * fetch options passed to the constructor\n   * @param rpcMethodName - The JSON-RPC method name of the current request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async #executeAndProcessRequest<Result extends Json>(\n    fetchOptions: FetchOptions,\n    rpcMethodName: string,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>> {\n    let response: Response | undefined;\n    try {\n      log(\n        `[${this.endpointUrl}] Circuit state`,\n        this.#policy.getCircuitState(),\n      );\n      const jsonDecodedResponse = await this.#policy.execute(\n        async (context) => {\n          // Reset response so that if this attempt throws before\n          // assigning a new response, the finally block does not read\n          // a stale response from a previous attempt.\n          response = undefined;\n          try {\n            log(\n              'REQUEST INITIATED:',\n              this.endpointUrl.toString(),\n              '::',\n              fetchOptions,\n              // @ts-expect-error This property _is_ here, the type of\n              // ServicePolicy is just wrong.\n              `(attempt ${context.attempt + 1})`,\n            );\n            response = await this.#fetch(this.endpointUrl, fetchOptions);\n            if (!response.ok) {\n              throw new HttpError(response.status);\n            }\n            log(\n              'REQUEST SUCCESSFUL:',\n              this.endpointUrl.toString(),\n              response.status,\n            );\n            return await response.json();\n          } finally {\n            // Track the RPC method and trace ID for the request that has just\n            // taken place. We pass these properties to `onDegraded` event\n            // listeners.\n            //\n            // We set these properties after the request completes and not\n            // before the request starts to account for race conditions. That\n            // is, if there are two requests that are being performed\n            // concurrently, and the second request fails fast but the first\n            // request succeeds slowly, when `onDegraded` is called we want it\n            // to include the first request as the RPC method, not the second.\n            //\n            // Also, we set these properties within a `finally` block inside of\n            // the function passed to `policy.execute` to ensure that they are\n            // set before `onDegraded` gets called, no matter the outcome of\n            // the request.\n            this.#currentRpcMethodName = rpcMethodName;\n            this.#currentTraceId =\n              response?.headers.get('X-Trace-Id') ?? undefined;\n          }\n        },\n      );\n      this.lastError = undefined;\n      return jsonDecodedResponse;\n    } catch (error) {\n      log('REQUEST ERROR:', this.endpointUrl.toString(), error);\n\n      this.lastError =\n        error instanceof Error ? error : new Error(getErrorMessage(error));\n\n      if (error instanceof HttpError) {\n        const status = error.httpStatus;\n        if (status === 401) {\n          throw new JsonRpcError(\n            CUSTOM_RPC_ERRORS.unauthorized,\n            'Unauthorized.',\n            {\n              httpStatus: status,\n            },\n          );\n        }\n        if (status === 429) {\n          throw rpcErrors.limitExceeded({\n            message: 'Request is being rate limited.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n        if (status >= 500 || status === 402 || status === 404) {\n          throw rpcErrors.resourceUnavailable({\n            message: 'RPC endpoint not found or unavailable.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n\n        // Handle all other 4xx errors as generic HTTP client errors\n        throw new JsonRpcError(\n          CUSTOM_RPC_ERRORS.httpClientError,\n          'RPC endpoint returned HTTP client error.',\n          {\n            httpStatus: status,\n          },\n        );\n      } else if (isJsonParseError(error)) {\n        throw rpcErrors.parse({\n          message: 'RPC endpoint did not return JSON.',\n        });\n      } else if (error instanceof BrokenCircuitError) {\n        this.#logger?.warn(error);\n        const remainingCircuitOpenDuration =\n          this.#policy.getRemainingCircuitOpenDuration();\n        const formattedRemainingCircuitOpenDuration = Intl.NumberFormat(\n          undefined,\n          { maximumFractionDigits: 2 },\n        ).format(\n          (remainingCircuitOpenDuration ?? this.#policy.circuitBreakDuration) /\n            Duration.Minute,\n        );\n        throw rpcErrors.resourceUnavailable({\n          message: `RPC endpoint returned too many errors, retrying in ${formattedRemainingCircuitOpenDuration} minutes. Consider using a different RPC endpoint.`,\n        });\n      }\n      throw error;\n    }\n  }\n}\n"]}
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type {\n  CreateServicePolicyOptions,\n  ServicePolicy,\n} from '@metamask/controller-utils';\nimport {\n  BrokenCircuitError,\n  HttpError,\n  createServicePolicy,\n  handleWhen,\n} from '@metamask/controller-utils';\nimport { JsonRpcError, rpcErrors } from '@metamask/rpc-errors';\nimport { Duration, getErrorMessage, hasProperty } from '@metamask/utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { CircuitState } from 'cockatiel';\nimport deepmerge from 'deepmerge';\nimport type { Logger } from 'loglevel';\n\nimport { projectLogger, createModuleLogger } from '../logger.js';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared.js';\n\n/**\n * Options for the RpcService constructor with some properties omitted and made optional as they have defaults.\n */\nexport type RpcServiceOptionsWithDefaults = Omit<\n  RpcServiceOptions,\n  'failoverService' | 'endpointUrl' | 'isOffline' | 'btoa' | 'fetch'\n> &\n  Partial<Pick<RpcServiceOptions, 'isOffline' | 'btoa' | 'fetch'>>;\n\n/**\n * Options for the RpcService constructor.\n */\nexport type RpcServiceOptions = {\n  /**\n   * A function that can be used to convert a binary string into a\n   * base64-encoded ASCII string. Used to encode authorization credentials.\n   */\n  btoa: typeof btoa;\n  /**\n   * The URL of the RPC endpoint to hit.\n   */\n  endpointUrl: URL | string;\n  /**\n   * A function that can be used to make an HTTP request. If your JavaScript\n   * environment supports `fetch` natively, you'll probably want to pass that;\n   * otherwise you can pass an equivalent (such as `fetch` via `node-fetch`).\n   */\n  fetch: typeof fetch;\n  /**\n   * A common set of options that will be used to make every request. Can be\n   * overridden on the request level (e.g. to add headers).\n   */\n  fetchOptions?: FetchOptions;\n  /**\n   * A `loglevel` logger.\n   */\n  logger?: Pick<Logger, 'warn'>;\n  /**\n   * Options to pass to `createServicePolicy`. Note that `retryFilterPolicy` and `isServiceFailure`\n   * are not accepted, as they are overwritten. See {@link createServicePolicy}.\n   */\n  policyOptions?: Omit<\n    CreateServicePolicyOptions,\n    'retryFilterPolicy' | 'isServiceFailure'\n  >;\n  /**\n   * A function that checks if the user is currently offline. If it returns true,\n   * connection errors will not be retried, preventing degraded and break\n   * callbacks from being triggered.\n   */\n  isOffline: () => boolean;\n};\n\nconst log = createModuleLogger(projectLogger, 'RpcService');\n\n/**\n * The maximum number of times that a failing service should be re-run before\n * giving up.\n *\n * Note: This is not used in production and should be removed.\n */\nexport const DEFAULT_MAX_RETRIES = 4;\n\n/**\n * The maximum number of times that the service is allowed to fail before\n * pausing further retries. This is set to a value such that if given a\n * service that continually fails, the policy needs to be executed 3 times\n * before further retries are paused.\n */\nexport const DEFAULT_MAX_CONSECUTIVE_FAILURES = (1 + DEFAULT_MAX_RETRIES) * 3;\n\n/**\n * The list of error messages that represent a failure to connect to the network.\n *\n * This list was derived from Sindre Sorhus's `is-network-error` package:\n * <https://github.com/sindresorhus/is-network-error/blob/7bbfa8be9482ce1427a21fbff60e3ee1650dd091/index.js>\n */\nexport const CONNECTION_ERRORS = [\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /network error/u,\n  },\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /Failed to fetch/u,\n  },\n  // Firefox\n  {\n    constructorName: 'TypeError',\n    pattern: /NetworkError when attempting to fetch resource\\./u,\n  },\n  // Safari 16\n  {\n    constructorName: 'TypeError',\n    pattern: /The Internet connection appears to be offline\\./u,\n  },\n  // Safari 17+\n  {\n    constructorName: 'TypeError',\n    pattern: /Load failed/u,\n  },\n  // `cross-fetch`\n  {\n    constructorName: 'TypeError',\n    pattern: /Network request failed/u,\n  },\n  // `node-fetch`\n  {\n    constructorName: 'FetchError',\n    pattern: /request to (.+) failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /fetch failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /terminated/u,\n  },\n];\n\n/**\n * Custom JSON-RPC error codes for specific cases.\n *\n * These should be moved to `@metamask/rpc-errors` eventually.\n */\nexport const CUSTOM_RPC_ERRORS = {\n  unauthorized: -32006,\n  httpClientError: -32080,\n} as const;\n\n/**\n * Determines whether the given error represents a failure to reach the network\n * after request parameters have been validated.\n *\n * This is somewhat difficult to verify because JavaScript engines (and in\n * some cases libraries) produce slightly different error messages for this\n * particular scenario, and we need to account for this.\n *\n * @param error - The error.\n * @returns True if the error indicates that the network cannot be connected to,\n * and false otherwise.\n */\nexport function isConnectionError(error: unknown): boolean {\n  if (!(typeof error === 'object' && error !== null && 'message' in error)) {\n    return false;\n  }\n\n  const { message } = error;\n\n  return (\n    typeof message === 'string' &&\n    !isNockError(message) &&\n    CONNECTION_ERRORS.some(({ constructorName, pattern }) => {\n      return (\n        error.constructor.name === constructorName && pattern.test(message)\n      );\n    })\n  );\n}\n\n/**\n * Determines whether the given error message refers to a Nock error.\n *\n * It's important that if we failed to mock a request in a test, the resulting\n * error does not cause the request to be retried so that we can see it right\n * away.\n *\n * @param message - The error message to test.\n * @returns True if the message indicates a missing Nock mock, false otherwise.\n */\nfunction isNockError(message: string): boolean {\n  return message.includes('Nock:');\n}\n\n/**\n * Determine whether the given error message indicates a failure to parse JSON.\n *\n * This is different in tests vs. implementation code because it may manifest as\n * a FetchError or a SyntaxError.\n *\n * @param error - The error object to test.\n * @returns True if the error indicates a JSON parse error, false otherwise.\n */\nexport function isJsonParseError(error: unknown): boolean {\n  return (\n    error instanceof SyntaxError ||\n    /invalid json/iu.test(getErrorMessage(error))\n  );\n}\n\n/**\n * Determines whether the given error represents a HTTP server error\n * (502, 503, or 504) that should be retried.\n *\n * @param error - The error object to test.\n * @returns True if the error has an httpStatus of 502, 503, or 504.\n */\nexport function isHttpServerError(error: Error): boolean {\n  return (\n    'httpStatus' in error &&\n    (error.httpStatus === 502 ||\n      error.httpStatus === 503 ||\n      error.httpStatus === 504)\n  );\n}\n\n/**\n * Determines whether the given error has a `code` property of `ETIMEDOUT`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ETIMEDOUT`.\n */\nexport function isTimeoutError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ETIMEDOUT';\n}\n\n/**\n * Determines whether the given error has a `code` property of `ECONNRESET`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ECONNRESET`.\n */\nexport function isConnectionResetError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ECONNRESET';\n}\n\n/**\n * Guarantees a URL, even given a string. This is useful for checking components\n * of that URL.\n *\n * @param endpointUrlOrUrlString - Either a URL object or a string that\n * represents the URL of an endpoint.\n * @returns A URL object.\n */\nfunction getNormalizedEndpointUrl(endpointUrlOrUrlString: URL | string): URL {\n  return endpointUrlOrUrlString instanceof URL\n    ? endpointUrlOrUrlString\n    : new URL(endpointUrlOrUrlString);\n}\n\n/**\n * Strips username and password from a URL.\n *\n * @param url - The URL to strip credentials from.\n * @returns A new URL object with credentials removed.\n */\nfunction stripCredentialsFromUrl(url: URL): URL {\n  const strippedUrl = new URL(url.toString());\n  strippedUrl.username = '';\n  strippedUrl.password = '';\n  return strippedUrl;\n}\n\nconst INFURA_NON_FAILURE_HTTP_STATUS_CODES = [400, 429];\n\n/**\n * Predicate function that determines if an error from Infura is treated as a service failure.\n *\n * @param error - The error.\n * @returns True if the error should be treated as a service policy failure. Most errors are treated like failures,\n * with the exception of certain HTTP status codes.\n */\nfunction isServiceFailureInfura(error: unknown): boolean {\n  if (\n    typeof error === 'object' &&\n    error !== null &&\n    hasProperty(error, 'httpStatus') &&\n    typeof error.httpStatus === 'number'\n  ) {\n    return !INFURA_NON_FAILURE_HTTP_STATUS_CODES.includes(error.httpStatus);\n  }\n\n  // If the error is not an object, or doesn't have a numeric httpStatus\n  // property, consider it a service failure (e.g., network errors, timeouts,\n  // etc.)\n  return true;\n}\n\n/**\n * This class is responsible for making a request to an endpoint that implements\n * the JSON-RPC protocol. It is designed to gracefully handle network and server\n * failures, retrying requests using exponential backoff. It also offers a hook\n * which can used to respond to slow requests.\n */\nexport class RpcService {\n  /**\n   * The URL of the RPC endpoint.\n   */\n  readonly endpointUrl: URL;\n\n  /**\n   * The last error that the retry policy captured (or `undefined` if the last\n   * execution of the service was successful).\n   */\n  lastError: Error | undefined;\n\n  /**\n   * The RPC method name of the current request being processed. This is passed\n   * to `onDegraded` event listeners.\n   *\n   * Initialised to `''` so the type is `string` throughout the event chain.\n   * The empty string is unreachable in practice because the method name is\n   * guaranteed to be set after the current request is completed but before\n   * any `onDegraded` callbacks are called.\n   */\n  #currentRpcMethodName = '';\n\n  /**\n   * The trace ID from the `X-Trace-Id` response header of the most recent\n   * request. Passed to `onDegraded` event listeners for debugging.\n   *\n   * `undefined` when no response has been received yet or when the response\n   * did not include the header.\n   */\n  #currentTraceId: string | undefined;\n\n  /**\n   * The function used to make an HTTP request.\n   */\n  readonly #fetch: typeof fetch;\n\n  /**\n   * A common set of options that the request options will extend.\n   */\n  readonly #fetchOptions: FetchOptions;\n\n  /**\n   * A `loglevel` logger.\n   */\n  readonly #logger: RpcServiceOptions['logger'];\n\n  /**\n   * The policy that wraps the request.\n   */\n  readonly #policy: ServicePolicy;\n\n  /**\n   * Constructs a new RpcService object.\n   *\n   * @param options - The options. See {@link RpcServiceOptions}.\n   */\n  constructor(options: RpcServiceOptions) {\n    const {\n      btoa: givenBtoa,\n      endpointUrl,\n      fetch: givenFetch,\n      logger,\n      fetchOptions = {},\n      policyOptions = {},\n      isOffline,\n    } = options;\n\n    this.#fetch = givenFetch;\n    const normalizedUrl = getNormalizedEndpointUrl(endpointUrl);\n    this.#fetchOptions = this.#getDefaultFetchOptions(\n      normalizedUrl,\n      fetchOptions,\n      givenBtoa,\n    );\n    this.endpointUrl = stripCredentialsFromUrl(normalizedUrl);\n    this.#logger = logger;\n\n    const isInfura = normalizedUrl.hostname.endsWith('.infura.io');\n\n    this.#policy = createServicePolicy({\n      maxRetries: DEFAULT_MAX_RETRIES,\n      maxConsecutiveFailures: DEFAULT_MAX_CONSECUTIVE_FAILURES,\n      ...policyOptions,\n      isServiceFailure: isInfura ? isServiceFailureInfura : undefined,\n      retryFilterPolicy: handleWhen((error) => {\n        // If user is offline, don't retry any errors\n        // This prevents degraded/break callbacks from being triggered\n        if (isOffline()) {\n          return false;\n        }\n\n        return (\n          // Ignore errors where the request failed to establish\n          isConnectionError(error) ||\n          // Ignore server sent HTML error pages or truncated JSON responses\n          isJsonParseError(error) ||\n          // Ignore server overload errors\n          isHttpServerError(error) ||\n          // Ignore timeout errors\n          isTimeoutError(error) ||\n          // Ignore connection reset errors\n          isConnectionResetError(error)\n        );\n      }),\n    });\n  }\n\n  /**\n   * Resets the underlying composite Cockatiel policy.\n   *\n   * This is useful in a collection of RpcServices where some act as failovers\n   * for others where you effectively want to invalidate the failovers when the\n   * primary recovers.\n   */\n  resetPolicy(): void {\n    this.#policy.reset();\n  }\n\n  /**\n   * @returns The state of the underlying circuit.\n   */\n  getCircuitState(): CircuitState {\n    return this.#policy.getCircuitState();\n  }\n\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']> {\n    return this.#policy.onRetry((data) => {\n      listener({ ...data, endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row, causing the underlying circuit to break.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']> {\n    return this.#policy.onBreak((data) => {\n      // `{ isolated: true }` is a special object that shows up when `isolate`\n      // is called on the circuit breaker. Usually `isolate` is used to hold the\n      // circuit open, but we (ab)use this method in `createServicePolicy` to\n      // reset the circuit breaker policy. When we do this, we don't want to\n      // call `onBreak` handlers, because then it causes\n      // `NetworkController:rpcEndpointUnavailable` and\n      // `NetworkController:rpcEndpointChainUnavailable` to be published. So we\n      // have to ignore that object here. The consequence is that `isolate`\n      // doesn't function the way it is intended, at least in the context of an\n      // RpcService. However, we are making a bet that we won't need to use it\n      // other than how we are already using it.\n      if (!('isolated' in data)) {\n        listener({\n          ...data,\n          endpointUrl: this.endpointUrl.toString(),\n        });\n      }\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      {\n        duration?: number;\n        endpointUrl: string;\n        rpcMethodName: string;\n        traceId?: string;\n      }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']> {\n    return this.#policy.onDegraded((data) => {\n      listener({\n        ...data,\n        endpointUrl: this.endpointUrl.toString(),\n        rpcMethodName: this.#currentRpcMethodName,\n        traceId: this.#currentTraceId,\n      });\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onAvailable} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']> {\n    return this.#policy.onAvailable(() => {\n      listener({ endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params> & { method: 'eth_getBlockByNumber' },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    // The request object may be frozen and must not be mutated.\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    const completeFetchOptions = this.#getCompleteFetchOptions(\n      jsonRpcRequest,\n      fetchOptions,\n    );\n    return await this.#executeAndProcessRequest<Result>(\n      completeFetchOptions,\n      jsonRpcRequest.method,\n    );\n  }\n\n  /**\n   * Constructs a default set of options to `fetch`.\n   *\n   * If a username and password are present in the URL, they are extracted to an\n   * Authorization header.\n   *\n   * @param endpointUrl - The endpoint URL.\n   * @param fetchOptions - The options to `fetch`.\n   * @param givenBtoa - An implementation of `btoa`.\n   * @returns The default fetch options.\n   */\n  #getDefaultFetchOptions(\n    endpointUrl: URL,\n    fetchOptions: FetchOptions,\n    givenBtoa: (stringToEncode: string) => string,\n  ): FetchOptions {\n    if (endpointUrl.username && endpointUrl.password) {\n      const authString = `${endpointUrl.username}:${endpointUrl.password}`;\n      const encodedCredentials = givenBtoa(authString);\n      return deepmerge(fetchOptions, {\n        headers: { Authorization: `Basic ${encodedCredentials}` },\n      });\n    }\n\n    return fetchOptions;\n  }\n\n  /**\n   * Constructs a final set of options to pass to `fetch`. Note that the method\n   * defaults to `post`, and the JSON-RPC request is automatically JSON-encoded.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request.\n   * @param fetchOptions - Custom `fetch` options.\n   * @returns The complete set of `fetch` options.\n   */\n  #getCompleteFetchOptions<Params extends JsonRpcParams>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions,\n  ): FetchOptions {\n    const defaultOptions = {\n      method: 'POST',\n      headers: {\n        Accept: 'application/json',\n        'Content-Type': 'application/json',\n      },\n    };\n    const mergedOptions = deepmerge(\n      defaultOptions,\n      deepmerge(this.#fetchOptions, fetchOptions),\n    );\n\n    const { id, jsonrpc, method, params } = jsonRpcRequest;\n    const body = JSON.stringify({\n      id,\n      jsonrpc,\n      method,\n      params,\n    });\n\n    return { ...mergedOptions, body };\n  }\n\n  /**\n   * Makes the request using the Cockatiel policy that this service creates.\n   *\n   * @param fetchOptions - The options for `fetch`; will be combined with the\n   * fetch options passed to the constructor\n   * @param rpcMethodName - The JSON-RPC method name of the current request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async #executeAndProcessRequest<Result extends Json>(\n    fetchOptions: FetchOptions,\n    rpcMethodName: string,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>> {\n    let response: Response | undefined;\n    try {\n      log(\n        `[${this.endpointUrl}] Circuit state`,\n        this.#policy.getCircuitState(),\n      );\n      const jsonDecodedResponse = await this.#policy.execute(\n        async (context) => {\n          // Reset response so that if this attempt throws before\n          // assigning a new response, the finally block does not read\n          // a stale response from a previous attempt.\n          response = undefined;\n          try {\n            log(\n              'REQUEST INITIATED:',\n              this.endpointUrl.toString(),\n              '::',\n              fetchOptions,\n              // @ts-expect-error This property _is_ here, the type of\n              // ServicePolicy is just wrong.\n              `(attempt ${context.attempt + 1})`,\n            );\n            response = await this.#fetch(this.endpointUrl, fetchOptions);\n            if (!response.ok) {\n              throw new HttpError(response.status);\n            }\n            log(\n              'REQUEST SUCCESSFUL:',\n              this.endpointUrl.toString(),\n              response.status,\n            );\n            return await response.json();\n          } finally {\n            // Track the RPC method and trace ID for the request that has just\n            // taken place. We pass these properties to `onDegraded` event\n            // listeners.\n            //\n            // We set these properties after the request completes and not\n            // before the request starts to account for race conditions. That\n            // is, if there are two requests that are being performed\n            // concurrently, and the second request fails fast but the first\n            // request succeeds slowly, when `onDegraded` is called we want it\n            // to include the first request as the RPC method, not the second.\n            //\n            // Also, we set these properties within a `finally` block inside of\n            // the function passed to `policy.execute` to ensure that they are\n            // set before `onDegraded` gets called, no matter the outcome of\n            // the request.\n            this.#currentRpcMethodName = rpcMethodName;\n            this.#currentTraceId =\n              response?.headers.get('X-Trace-Id') ?? undefined;\n          }\n        },\n      );\n      this.lastError = undefined;\n      return jsonDecodedResponse;\n    } catch (error) {\n      log('REQUEST ERROR:', this.endpointUrl.toString(), error);\n\n      this.lastError =\n        error instanceof Error ? error : new Error(getErrorMessage(error));\n\n      if (error instanceof HttpError) {\n        const status = error.httpStatus;\n        if (status === 401) {\n          throw new JsonRpcError(\n            CUSTOM_RPC_ERRORS.unauthorized,\n            'Unauthorized.',\n            {\n              httpStatus: status,\n            },\n          );\n        }\n        if (status === 429) {\n          throw rpcErrors.limitExceeded({\n            message: 'Request is being rate limited.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n        if (status >= 500 || status === 402 || status === 404) {\n          throw rpcErrors.resourceUnavailable({\n            message: 'RPC endpoint not found or unavailable.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n\n        // Handle all other 4xx errors as generic HTTP client errors\n        throw new JsonRpcError(\n          CUSTOM_RPC_ERRORS.httpClientError,\n          'RPC endpoint returned HTTP client error.',\n          {\n            httpStatus: status,\n          },\n        );\n      } else if (isJsonParseError(error)) {\n        throw rpcErrors.parse({\n          message: 'RPC endpoint did not return JSON.',\n        });\n      } else if (error instanceof BrokenCircuitError) {\n        this.#logger?.warn(error);\n        const remainingCircuitOpenDuration =\n          this.#policy.getRemainingCircuitOpenDuration();\n        const formattedRemainingCircuitOpenDuration = Intl.NumberFormat(\n          undefined,\n          { maximumFractionDigits: 2 },\n        ).format(\n          (remainingCircuitOpenDuration ?? this.#policy.circuitBreakDuration) /\n            Duration.Minute,\n        );\n        throw rpcErrors.resourceUnavailable({\n          message: `RPC endpoint returned too many errors, retrying in ${formattedRemainingCircuitOpenDuration} minutes. Consider using a different RPC endpoint.`,\n        });\n      }\n      throw error;\n    }\n  }\n}\n"]}

dist/rpc-service/rpc-service.d.cts.map

@@ -1,1 +0,1 @@
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type {\n  CreateServicePolicyOptions,\n  ServicePolicy,\n} from '@metamask/controller-utils';\nimport {\n  BrokenCircuitError,\n  HttpError,\n  createServicePolicy,\n  handleWhen,\n} from '@metamask/controller-utils';\nimport { JsonRpcError, rpcErrors } from '@metamask/rpc-errors';\nimport { Duration, getErrorMessage, hasProperty } from '@metamask/utils';\nimport type {\n  Json,\n  JsonRpcParams,\n  JsonRpcRequest,\n  JsonRpcResponse,\n} from '@metamask/utils';\nimport { CircuitState } from 'cockatiel';\nimport deepmerge from 'deepmerge';\nimport type { Logger } from 'loglevel';\n\nimport { projectLogger, createModuleLogger } from '../logger';\nimport type {\n  CockatielEventToEventListenerWithData,\n  ExcludeCockatielEventData,\n  ExtendCockatielEventData,\n  ExtractCockatielEventData,\n  FetchOptions,\n} from './shared';\n\n/**\n * Options for the RpcService constructor with some properties omitted and made optional as they have defaults.\n */\nexport type RpcServiceOptionsWithDefaults = Omit<\n  RpcServiceOptions,\n  'failoverService' | 'endpointUrl' | 'isOffline' | 'btoa' | 'fetch'\n> &\n  Partial<Pick<RpcServiceOptions, 'isOffline' | 'btoa' | 'fetch'>>;\n\n/**\n * Options for the RpcService constructor.\n */\nexport type RpcServiceOptions = {\n  /**\n   * A function that can be used to convert a binary string into a\n   * base64-encoded ASCII string. Used to encode authorization credentials.\n   */\n  btoa: typeof btoa;\n  /**\n   * The URL of the RPC endpoint to hit.\n   */\n  endpointUrl: URL | string;\n  /**\n   * A function that can be used to make an HTTP request. If your JavaScript\n   * environment supports `fetch` natively, you'll probably want to pass that;\n   * otherwise you can pass an equivalent (such as `fetch` via `node-fetch`).\n   */\n  fetch: typeof fetch;\n  /**\n   * A common set of options that will be used to make every request. Can be\n   * overridden on the request level (e.g. to add headers).\n   */\n  fetchOptions?: FetchOptions;\n  /**\n   * A `loglevel` logger.\n   */\n  logger?: Pick<Logger, 'warn'>;\n  /**\n   * Options to pass to `createServicePolicy`. Note that `retryFilterPolicy` and `isServiceFailure`\n   * are not accepted, as they are overwritten. See {@link createServicePolicy}.\n   */\n  policyOptions?: Omit<\n    CreateServicePolicyOptions,\n    'retryFilterPolicy' | 'isServiceFailure'\n  >;\n  /**\n   * A function that checks if the user is currently offline. If it returns true,\n   * connection errors will not be retried, preventing degraded and break\n   * callbacks from being triggered.\n   */\n  isOffline: () => boolean;\n};\n\nconst log = createModuleLogger(projectLogger, 'RpcService');\n\n/**\n * The maximum number of times that a failing service should be re-run before\n * giving up.\n *\n * Note: This is not used in production and should be removed.\n */\nexport const DEFAULT_MAX_RETRIES = 4;\n\n/**\n * The maximum number of times that the service is allowed to fail before\n * pausing further retries. This is set to a value such that if given a\n * service that continually fails, the policy needs to be executed 3 times\n * before further retries are paused.\n */\nexport const DEFAULT_MAX_CONSECUTIVE_FAILURES = (1 + DEFAULT_MAX_RETRIES) * 3;\n\n/**\n * The list of error messages that represent a failure to connect to the network.\n *\n * This list was derived from Sindre Sorhus's `is-network-error` package:\n * <https://github.com/sindresorhus/is-network-error/blob/7bbfa8be9482ce1427a21fbff60e3ee1650dd091/index.js>\n */\nexport const CONNECTION_ERRORS = [\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /network error/u,\n  },\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /Failed to fetch/u,\n  },\n  // Firefox\n  {\n    constructorName: 'TypeError',\n    pattern: /NetworkError when attempting to fetch resource\\./u,\n  },\n  // Safari 16\n  {\n    constructorName: 'TypeError',\n    pattern: /The Internet connection appears to be offline\\./u,\n  },\n  // Safari 17+\n  {\n    constructorName: 'TypeError',\n    pattern: /Load failed/u,\n  },\n  // `cross-fetch`\n  {\n    constructorName: 'TypeError',\n    pattern: /Network request failed/u,\n  },\n  // `node-fetch`\n  {\n    constructorName: 'FetchError',\n    pattern: /request to (.+) failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /fetch failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /terminated/u,\n  },\n];\n\n/**\n * Custom JSON-RPC error codes for specific cases.\n *\n * These should be moved to `@metamask/rpc-errors` eventually.\n */\nexport const CUSTOM_RPC_ERRORS = {\n  unauthorized: -32006,\n  httpClientError: -32080,\n} as const;\n\n/**\n * Determines whether the given error represents a failure to reach the network\n * after request parameters have been validated.\n *\n * This is somewhat difficult to verify because JavaScript engines (and in\n * some cases libraries) produce slightly different error messages for this\n * particular scenario, and we need to account for this.\n *\n * @param error - The error.\n * @returns True if the error indicates that the network cannot be connected to,\n * and false otherwise.\n */\nexport function isConnectionError(error: unknown): boolean {\n  if (!(typeof error === 'object' && error !== null && 'message' in error)) {\n    return false;\n  }\n\n  const { message } = error;\n\n  return (\n    typeof message === 'string' &&\n    !isNockError(message) &&\n    CONNECTION_ERRORS.some(({ constructorName, pattern }) => {\n      return (\n        error.constructor.name === constructorName && pattern.test(message)\n      );\n    })\n  );\n}\n\n/**\n * Determines whether the given error message refers to a Nock error.\n *\n * It's important that if we failed to mock a request in a test, the resulting\n * error does not cause the request to be retried so that we can see it right\n * away.\n *\n * @param message - The error message to test.\n * @returns True if the message indicates a missing Nock mock, false otherwise.\n */\nfunction isNockError(message: string): boolean {\n  return message.includes('Nock:');\n}\n\n/**\n * Determine whether the given error message indicates a failure to parse JSON.\n *\n * This is different in tests vs. implementation code because it may manifest as\n * a FetchError or a SyntaxError.\n *\n * @param error - The error object to test.\n * @returns True if the error indicates a JSON parse error, false otherwise.\n */\nexport function isJsonParseError(error: unknown): boolean {\n  return (\n    error instanceof SyntaxError ||\n    /invalid json/iu.test(getErrorMessage(error))\n  );\n}\n\n/**\n * Determines whether the given error represents a HTTP server error\n * (502, 503, or 504) that should be retried.\n *\n * @param error - The error object to test.\n * @returns True if the error has an httpStatus of 502, 503, or 504.\n */\nexport function isHttpServerError(error: Error): boolean {\n  return (\n    'httpStatus' in error &&\n    (error.httpStatus === 502 ||\n      error.httpStatus === 503 ||\n      error.httpStatus === 504)\n  );\n}\n\n/**\n * Determines whether the given error has a `code` property of `ETIMEDOUT`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ETIMEDOUT`.\n */\nexport function isTimeoutError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ETIMEDOUT';\n}\n\n/**\n * Determines whether the given error has a `code` property of `ECONNRESET`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ECONNRESET`.\n */\nexport function isConnectionResetError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ECONNRESET';\n}\n\n/**\n * Guarantees a URL, even given a string. This is useful for checking components\n * of that URL.\n *\n * @param endpointUrlOrUrlString - Either a URL object or a string that\n * represents the URL of an endpoint.\n * @returns A URL object.\n */\nfunction getNormalizedEndpointUrl(endpointUrlOrUrlString: URL | string): URL {\n  return endpointUrlOrUrlString instanceof URL\n    ? endpointUrlOrUrlString\n    : new URL(endpointUrlOrUrlString);\n}\n\n/**\n * Strips username and password from a URL.\n *\n * @param url - The URL to strip credentials from.\n * @returns A new URL object with credentials removed.\n */\nfunction stripCredentialsFromUrl(url: URL): URL {\n  const strippedUrl = new URL(url.toString());\n  strippedUrl.username = '';\n  strippedUrl.password = '';\n  return strippedUrl;\n}\n\nconst INFURA_NON_FAILURE_HTTP_STATUS_CODES = [400, 429];\n\n/**\n * Predicate function that determines if an error from Infura is treated as a service failure.\n *\n * @param error - The error.\n * @returns True if the error should be treated as a service policy failure. Most errors are treated like failures,\n * with the exception of certain HTTP status codes.\n */\nfunction isServiceFailureInfura(error: unknown): boolean {\n  if (\n    typeof error === 'object' &&\n    error !== null &&\n    hasProperty(error, 'httpStatus') &&\n    typeof error.httpStatus === 'number'\n  ) {\n    return !INFURA_NON_FAILURE_HTTP_STATUS_CODES.includes(error.httpStatus);\n  }\n\n  // If the error is not an object, or doesn't have a numeric httpStatus\n  // property, consider it a service failure (e.g., network errors, timeouts,\n  // etc.)\n  return true;\n}\n\n/**\n * This class is responsible for making a request to an endpoint that implements\n * the JSON-RPC protocol. It is designed to gracefully handle network and server\n * failures, retrying requests using exponential backoff. It also offers a hook\n * which can used to respond to slow requests.\n */\nexport class RpcService {\n  /**\n   * The URL of the RPC endpoint.\n   */\n  readonly endpointUrl: URL;\n\n  /**\n   * The last error that the retry policy captured (or `undefined` if the last\n   * execution of the service was successful).\n   */\n  lastError: Error | undefined;\n\n  /**\n   * The RPC method name of the current request being processed. This is passed\n   * to `onDegraded` event listeners.\n   *\n   * Initialised to `''` so the type is `string` throughout the event chain.\n   * The empty string is unreachable in practice because the method name is\n   * guaranteed to be set after the current request is completed but before\n   * any `onDegraded` callbacks are called.\n   */\n  #currentRpcMethodName = '';\n\n  /**\n   * The trace ID from the `X-Trace-Id` response header of the most recent\n   * request. Passed to `onDegraded` event listeners for debugging.\n   *\n   * `undefined` when no response has been received yet or when the response\n   * did not include the header.\n   */\n  #currentTraceId: string | undefined;\n\n  /**\n   * The function used to make an HTTP request.\n   */\n  readonly #fetch: typeof fetch;\n\n  /**\n   * A common set of options that the request options will extend.\n   */\n  readonly #fetchOptions: FetchOptions;\n\n  /**\n   * A `loglevel` logger.\n   */\n  readonly #logger: RpcServiceOptions['logger'];\n\n  /**\n   * The policy that wraps the request.\n   */\n  readonly #policy: ServicePolicy;\n\n  /**\n   * Constructs a new RpcService object.\n   *\n   * @param options - The options. See {@link RpcServiceOptions}.\n   */\n  constructor(options: RpcServiceOptions) {\n    const {\n      btoa: givenBtoa,\n      endpointUrl,\n      fetch: givenFetch,\n      logger,\n      fetchOptions = {},\n      policyOptions = {},\n      isOffline,\n    } = options;\n\n    this.#fetch = givenFetch;\n    const normalizedUrl = getNormalizedEndpointUrl(endpointUrl);\n    this.#fetchOptions = this.#getDefaultFetchOptions(\n      normalizedUrl,\n      fetchOptions,\n      givenBtoa,\n    );\n    this.endpointUrl = stripCredentialsFromUrl(normalizedUrl);\n    this.#logger = logger;\n\n    const isInfura = normalizedUrl.hostname.endsWith('.infura.io');\n\n    this.#policy = createServicePolicy({\n      maxRetries: DEFAULT_MAX_RETRIES,\n      maxConsecutiveFailures: DEFAULT_MAX_CONSECUTIVE_FAILURES,\n      ...policyOptions,\n      isServiceFailure: isInfura ? isServiceFailureInfura : undefined,\n      retryFilterPolicy: handleWhen((error) => {\n        // If user is offline, don't retry any errors\n        // This prevents degraded/break callbacks from being triggered\n        if (isOffline()) {\n          return false;\n        }\n\n        return (\n          // Ignore errors where the request failed to establish\n          isConnectionError(error) ||\n          // Ignore server sent HTML error pages or truncated JSON responses\n          isJsonParseError(error) ||\n          // Ignore server overload errors\n          isHttpServerError(error) ||\n          // Ignore timeout errors\n          isTimeoutError(error) ||\n          // Ignore connection reset errors\n          isConnectionResetError(error)\n        );\n      }),\n    });\n  }\n\n  /**\n   * Resets the underlying composite Cockatiel policy.\n   *\n   * This is useful in a collection of RpcServices where some act as failovers\n   * for others where you effectively want to invalidate the failovers when the\n   * primary recovers.\n   */\n  resetPolicy(): void {\n    this.#policy.reset();\n  }\n\n  /**\n   * @returns The state of the underlying circuit.\n   */\n  getCircuitState(): CircuitState {\n    return this.#policy.getCircuitState();\n  }\n\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']> {\n    return this.#policy.onRetry((data) => {\n      listener({ ...data, endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row, causing the underlying circuit to break.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']> {\n    return this.#policy.onBreak((data) => {\n      // `{ isolated: true }` is a special object that shows up when `isolate`\n      // is called on the circuit breaker. Usually `isolate` is used to hold the\n      // circuit open, but we (ab)use this method in `createServicePolicy` to\n      // reset the circuit breaker policy. When we do this, we don't want to\n      // call `onBreak` handlers, because then it causes\n      // `NetworkController:rpcEndpointUnavailable` and\n      // `NetworkController:rpcEndpointChainUnavailable` to be published. So we\n      // have to ignore that object here. The consequence is that `isolate`\n      // doesn't function the way it is intended, at least in the context of an\n      // RpcService. However, we are making a bet that we won't need to use it\n      // other than how we are already using it.\n      if (!('isolated' in data)) {\n        listener({\n          ...data,\n          endpointUrl: this.endpointUrl.toString(),\n        });\n      }\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      {\n        duration?: number;\n        endpointUrl: string;\n        rpcMethodName: string;\n        traceId?: string;\n      }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']> {\n    return this.#policy.onDegraded((data) => {\n      listener({\n        ...data,\n        endpointUrl: this.endpointUrl.toString(),\n        rpcMethodName: this.#currentRpcMethodName,\n        traceId: this.#currentTraceId,\n      });\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onAvailable} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']> {\n    return this.#policy.onAvailable(() => {\n      listener({ endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params> & { method: 'eth_getBlockByNumber' },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    // The request object may be frozen and must not be mutated.\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    const completeFetchOptions = this.#getCompleteFetchOptions(\n      jsonRpcRequest,\n      fetchOptions,\n    );\n    return await this.#executeAndProcessRequest<Result>(\n      completeFetchOptions,\n      jsonRpcRequest.method,\n    );\n  }\n\n  /**\n   * Constructs a default set of options to `fetch`.\n   *\n   * If a username and password are present in the URL, they are extracted to an\n   * Authorization header.\n   *\n   * @param endpointUrl - The endpoint URL.\n   * @param fetchOptions - The options to `fetch`.\n   * @param givenBtoa - An implementation of `btoa`.\n   * @returns The default fetch options.\n   */\n  #getDefaultFetchOptions(\n    endpointUrl: URL,\n    fetchOptions: FetchOptions,\n    givenBtoa: (stringToEncode: string) => string,\n  ): FetchOptions {\n    if (endpointUrl.username && endpointUrl.password) {\n      const authString = `${endpointUrl.username}:${endpointUrl.password}`;\n      const encodedCredentials = givenBtoa(authString);\n      return deepmerge(fetchOptions, {\n        headers: { Authorization: `Basic ${encodedCredentials}` },\n      });\n    }\n\n    return fetchOptions;\n  }\n\n  /**\n   * Constructs a final set of options to pass to `fetch`. Note that the method\n   * defaults to `post`, and the JSON-RPC request is automatically JSON-encoded.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request.\n   * @param fetchOptions - Custom `fetch` options.\n   * @returns The complete set of `fetch` options.\n   */\n  #getCompleteFetchOptions<Params extends JsonRpcParams>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions,\n  ): FetchOptions {\n    const defaultOptions = {\n      method: 'POST',\n      headers: {\n        Accept: 'application/json',\n        'Content-Type': 'application/json',\n      },\n    };\n    const mergedOptions = deepmerge(\n      defaultOptions,\n      deepmerge(this.#fetchOptions, fetchOptions),\n    );\n\n    const { id, jsonrpc, method, params } = jsonRpcRequest;\n    const body = JSON.stringify({\n      id,\n      jsonrpc,\n      method,\n      params,\n    });\n\n    return { ...mergedOptions, body };\n  }\n\n  /**\n   * Makes the request using the Cockatiel policy that this service creates.\n   *\n   * @param fetchOptions - The options for `fetch`; will be combined with the\n   * fetch options passed to the constructor\n   * @param rpcMethodName - The JSON-RPC method name of the current request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async #executeAndProcessRequest<Result extends Json>(\n    fetchOptions: FetchOptions,\n    rpcMethodName: string,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>> {\n    let response: Response | undefined;\n    try {\n      log(\n        `[${this.endpointUrl}] Circuit state`,\n        this.#policy.getCircuitState(),\n      );\n      const jsonDecodedResponse = await this.#policy.execute(\n        async (context) => {\n          // Reset response so that if this attempt throws before\n          // assigning a new response, the finally block does not read\n          // a stale response from a previous attempt.\n          response = undefined;\n          try {\n            log(\n              'REQUEST INITIATED:',\n              this.endpointUrl.toString(),\n              '::',\n              fetchOptions,\n              // @ts-expect-error This property _is_ here, the type of\n              // ServicePolicy is just wrong.\n              `(attempt ${context.attempt + 1})`,\n            );\n            response = await this.#fetch(this.endpointUrl, fetchOptions);\n            if (!response.ok) {\n              throw new HttpError(response.status);\n            }\n            log(\n              'REQUEST SUCCESSFUL:',\n              this.endpointUrl.toString(),\n              response.status,\n            );\n            return await response.json();\n          } finally {\n            // Track the RPC method and trace ID for the request that has just\n            // taken place. We pass these properties to `onDegraded` event\n            // listeners.\n            //\n            // We set these properties after the request completes and not\n            // before the request starts to account for race conditions. That\n            // is, if there are two requests that are being performed\n            // concurrently, and the second request fails fast but the first\n            // request succeeds slowly, when `onDegraded` is called we want it\n            // to include the first request as the RPC method, not the second.\n            //\n            // Also, we set these properties within a `finally` block inside of\n            // the function passed to `policy.execute` to ensure that they are\n            // set before `onDegraded` gets called, no matter the outcome of\n            // the request.\n            this.#currentRpcMethodName = rpcMethodName;\n            this.#currentTraceId =\n              response?.headers.get('X-Trace-Id') ?? undefined;\n          }\n        },\n      );\n      this.lastError = undefined;\n      return jsonDecodedResponse;\n    } catch (error) {\n      log('REQUEST ERROR:', this.endpointUrl.toString(), error);\n\n      this.lastError =\n        error instanceof Error ? error : new Error(getErrorMessage(error));\n\n      if (error instanceof HttpError) {\n        const status = error.httpStatus;\n        if (status === 401) {\n          throw new JsonRpcError(\n            CUSTOM_RPC_ERRORS.unauthorized,\n            'Unauthorized.',\n            {\n              httpStatus: status,\n            },\n          );\n        }\n        if (status === 429) {\n          throw rpcErrors.limitExceeded({\n            message: 'Request is being rate limited.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n        if (status >= 500 || status === 402 || status === 404) {\n          throw rpcErrors.resourceUnavailable({\n            message: 'RPC endpoint not found or unavailable.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n\n        // Handle all other 4xx errors as generic HTTP client errors\n        throw new JsonRpcError(\n          CUSTOM_RPC_ERRORS.httpClientError,\n          'RPC endpoint returned HTTP client error.',\n          {\n            httpStatus: status,\n          },\n        );\n      } else if (isJsonParseError(error)) {\n        throw rpcErrors.parse({\n          message: 'RPC endpoint did not return JSON.',\n        });\n      } else if (error instanceof BrokenCircuitError) {\n        this.#logger?.warn(error);\n        const remainingCircuitOpenDuration =\n          this.#policy.getRemainingCircuitOpenDuration();\n        const formattedRemainingCircuitOpenDuration = Intl.NumberFormat(\n          undefined,\n          { maximumFractionDigits: 2 },\n        ).format(\n          (remainingCircuitOpenDuration ?? this.#policy.circuitBreakDuration) /\n            Duration.Minute,\n        );\n        throw rpcErrors.resourceUnavailable({\n          message: `RPC endpoint returned too many errors, retrying in ${formattedRemainingCircuitOpenDuration} minutes. Consider using a different RPC endpoint.`,\n        });\n      }\n      throw error;\n    }\n  }\n}\n"]}
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This is set to a value such that if given a\n * service that continually fails, the policy needs to be executed 3 times\n * before further retries are paused.\n */\nexport const DEFAULT_MAX_CONSECUTIVE_FAILURES = (1 + DEFAULT_MAX_RETRIES) * 3;\n\n/**\n * The list of error messages that represent a failure to connect to the network.\n *\n * This list was derived from Sindre Sorhus's `is-network-error` package:\n * <https://github.com/sindresorhus/is-network-error/blob/7bbfa8be9482ce1427a21fbff60e3ee1650dd091/index.js>\n */\nexport const CONNECTION_ERRORS = [\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /network error/u,\n  },\n  // Chrome\n  {\n    constructorName: 'TypeError',\n    pattern: /Failed to fetch/u,\n  },\n  // Firefox\n  {\n    constructorName: 'TypeError',\n    pattern: /NetworkError when attempting to fetch resource\\./u,\n  },\n  // Safari 16\n  {\n    constructorName: 'TypeError',\n    pattern: /The Internet connection appears to be offline\\./u,\n  },\n  // Safari 17+\n  {\n    constructorName: 'TypeError',\n    pattern: /Load failed/u,\n  },\n  // `cross-fetch`\n  {\n    constructorName: 'TypeError',\n    pattern: /Network request failed/u,\n  },\n  // `node-fetch`\n  {\n    constructorName: 'FetchError',\n    pattern: /request to (.+) failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /fetch failed/u,\n  },\n  // Undici (Node.js)\n  {\n    constructorName: 'TypeError',\n    pattern: /terminated/u,\n  },\n];\n\n/**\n * Custom JSON-RPC error codes for specific cases.\n *\n * These should be moved to `@metamask/rpc-errors` eventually.\n */\nexport const CUSTOM_RPC_ERRORS = {\n  unauthorized: -32006,\n  httpClientError: -32080,\n} as const;\n\n/**\n * Determines whether the given error represents a failure to reach the network\n * after request parameters have been validated.\n *\n * This is somewhat difficult to verify because JavaScript engines (and in\n * some cases libraries) produce slightly different error messages for this\n * particular scenario, and we need to account for this.\n *\n * @param error - The error.\n * @returns True if the error indicates that the network cannot be connected to,\n * and false otherwise.\n */\nexport function isConnectionError(error: unknown): boolean {\n  if (!(typeof error === 'object' && error !== null && 'message' in error)) {\n    return false;\n  }\n\n  const { message } = error;\n\n  return (\n    typeof message === 'string' &&\n    !isNockError(message) &&\n    CONNECTION_ERRORS.some(({ constructorName, pattern }) => {\n      return (\n        error.constructor.name === constructorName && pattern.test(message)\n      );\n    })\n  );\n}\n\n/**\n * Determines whether the given error message refers to a Nock error.\n *\n * It's important that if we failed to mock a request in a test, the resulting\n * error does not cause the request to be retried so that we can see it right\n * away.\n *\n * @param message - The error message to test.\n * @returns True if the message indicates a missing Nock mock, false otherwise.\n */\nfunction isNockError(message: string): boolean {\n  return message.includes('Nock:');\n}\n\n/**\n * Determine whether the given error message indicates a failure to parse JSON.\n *\n * This is different in tests vs. implementation code because it may manifest as\n * a FetchError or a SyntaxError.\n *\n * @param error - The error object to test.\n * @returns True if the error indicates a JSON parse error, false otherwise.\n */\nexport function isJsonParseError(error: unknown): boolean {\n  return (\n    error instanceof SyntaxError ||\n    /invalid json/iu.test(getErrorMessage(error))\n  );\n}\n\n/**\n * Determines whether the given error represents a HTTP server error\n * (502, 503, or 504) that should be retried.\n *\n * @param error - The error object to test.\n * @returns True if the error has an httpStatus of 502, 503, or 504.\n */\nexport function isHttpServerError(error: Error): boolean {\n  return (\n    'httpStatus' in error &&\n    (error.httpStatus === 502 ||\n      error.httpStatus === 503 ||\n      error.httpStatus === 504)\n  );\n}\n\n/**\n * Determines whether the given error has a `code` property of `ETIMEDOUT`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ETIMEDOUT`.\n */\nexport function isTimeoutError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ETIMEDOUT';\n}\n\n/**\n * Determines whether the given error has a `code` property of `ECONNRESET`.\n *\n * @param error - The error object to test.\n * @returns True if the error code is `ECONNRESET`.\n */\nexport function isConnectionResetError(error: Error): boolean {\n  return hasProperty(error, 'code') && error.code === 'ECONNRESET';\n}\n\n/**\n * Guarantees a URL, even given a string. 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See {@link RpcServiceOptions}.\n   */\n  constructor(options: RpcServiceOptions) {\n    const {\n      btoa: givenBtoa,\n      endpointUrl,\n      fetch: givenFetch,\n      logger,\n      fetchOptions = {},\n      policyOptions = {},\n      isOffline,\n    } = options;\n\n    this.#fetch = givenFetch;\n    const normalizedUrl = getNormalizedEndpointUrl(endpointUrl);\n    this.#fetchOptions = this.#getDefaultFetchOptions(\n      normalizedUrl,\n      fetchOptions,\n      givenBtoa,\n    );\n    this.endpointUrl = stripCredentialsFromUrl(normalizedUrl);\n    this.#logger = logger;\n\n    const isInfura = normalizedUrl.hostname.endsWith('.infura.io');\n\n    this.#policy = createServicePolicy({\n      maxRetries: DEFAULT_MAX_RETRIES,\n      maxConsecutiveFailures: DEFAULT_MAX_CONSECUTIVE_FAILURES,\n      ...policyOptions,\n      isServiceFailure: isInfura ? isServiceFailureInfura : undefined,\n      retryFilterPolicy: handleWhen((error) => {\n        // If user is offline, don't retry any errors\n        // This prevents degraded/break callbacks from being triggered\n        if (isOffline()) {\n          return false;\n        }\n\n        return (\n          // Ignore errors where the request failed to establish\n          isConnectionError(error) ||\n          // Ignore server sent HTML error pages or truncated JSON responses\n          isJsonParseError(error) ||\n          // Ignore server overload errors\n          isHttpServerError(error) ||\n          // Ignore timeout errors\n          isTimeoutError(error) ||\n          // Ignore connection reset errors\n          isConnectionResetError(error)\n        );\n      }),\n    });\n  }\n\n  /**\n   * Resets the underlying composite Cockatiel policy.\n   *\n   * This is useful in a collection of RpcServices where some act as failovers\n   * for others where you effectively want to invalidate the failovers when the\n   * primary recovers.\n   */\n  resetPolicy(): void {\n    this.#policy.reset();\n  }\n\n  /**\n   * @returns The state of the underlying circuit.\n   */\n  getCircuitState(): CircuitState {\n    return this.#policy.getCircuitState();\n  }\n\n  /**\n   * Listens for when the RPC service retries the request.\n   *\n   * @param listener - The callback to be called when the retry occurs.\n   * @returns What {@link ServicePolicy.onRetry} returns.\n   * @see {@link createServicePolicy}\n   */\n  onRetry(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onRetry'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onRetry']> {\n    return this.#policy.onRetry((data) => {\n      listener({ ...data, endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Listens for when the RPC service retries the request too many times in a\n   * row, causing the underlying circuit to break.\n   *\n   * @param listener - The callback to be called when the circuit is broken.\n   * @returns What {@link ServicePolicy.onBreak} returns.\n   * @see {@link createServicePolicy}\n   */\n  onBreak(\n    listener: (\n      data: ExcludeCockatielEventData<\n        ExtendCockatielEventData<\n          ExtractCockatielEventData<ServicePolicy['onBreak']>,\n          { endpointUrl: string }\n        >,\n        'isolated'\n      >,\n    ) => void,\n  ): ReturnType<ServicePolicy['onBreak']> {\n    return this.#policy.onBreak((data) => {\n      // `{ isolated: true }` is a special object that shows up when `isolate`\n      // is called on the circuit breaker. Usually `isolate` is used to hold the\n      // circuit open, but we (ab)use this method in `createServicePolicy` to\n      // reset the circuit breaker policy. When we do this, we don't want to\n      // call `onBreak` handlers, because then it causes\n      // `NetworkController:rpcEndpointUnavailable` and\n      // `NetworkController:rpcEndpointChainUnavailable` to be published. So we\n      // have to ignore that object here. The consequence is that `isolate`\n      // doesn't function the way it is intended, at least in the context of an\n      // RpcService. However, we are making a bet that we won't need to use it\n      // other than how we are already using it.\n      if (!('isolated' in data)) {\n        listener({\n          ...data,\n          endpointUrl: this.endpointUrl.toString(),\n        });\n      }\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service detects a slow\n   * request.\n   *\n   * @param listener - The callback to be called when the request is slow.\n   * @returns What {@link ServicePolicy.onDegraded} returns.\n   * @see {@link createServicePolicy}\n   */\n  onDegraded(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onDegraded'],\n      {\n        duration?: number;\n        endpointUrl: string;\n        rpcMethodName: string;\n        traceId?: string;\n      }\n    >,\n  ): ReturnType<ServicePolicy['onDegraded']> {\n    return this.#policy.onDegraded((data) => {\n      listener({\n        ...data,\n        endpointUrl: this.endpointUrl.toString(),\n        rpcMethodName: this.#currentRpcMethodName,\n        traceId: this.#currentTraceId,\n      });\n    });\n  }\n\n  /**\n   * Listens for when the policy underlying this RPC service is available.\n   *\n   * @param listener - The callback to be called when the request is available.\n   * @returns What {@link ServicePolicy.onAvailable} returns.\n   * @see {@link createServicePolicy}\n   */\n  onAvailable(\n    listener: CockatielEventToEventListenerWithData<\n      ServicePolicy['onAvailable'],\n      { endpointUrl: string }\n    >,\n  ): ReturnType<ServicePolicy['onAvailable']> {\n    return this.#policy.onAvailable(() => {\n      listener({ endpointUrl: this.endpointUrl.toString() });\n    });\n  }\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is specifically designed for `eth_getBlockByNumber`, which\n   * can return a `result` of `null` despite an expected `Result` being\n   * provided.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params> & { method: 'eth_getBlockByNumber' },\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>>;\n\n  /**\n   * Makes a request to the RPC endpoint.\n   *\n   * This overload is designed for all RPC methods except for\n   * `eth_getBlockByNumber`, which are expected to return a `result` of the\n   * expected `Result`.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request to send to the endpoint.\n   * @param fetchOptions - An options bag for {@link fetch} which further\n   * specifies the request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    jsonRpcRequest: JsonRpcRequest<Params>,\n    fetchOptions?: FetchOptions,\n  ): Promise<JsonRpcResponse<Result>>;\n\n  async request<Params extends JsonRpcParams, Result extends Json>(\n    // The request object may be frozen and must not be mutated.\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions = {},\n  ): Promise<JsonRpcResponse<Result | null>> {\n    const completeFetchOptions = this.#getCompleteFetchOptions(\n      jsonRpcRequest,\n      fetchOptions,\n    );\n    return await this.#executeAndProcessRequest<Result>(\n      completeFetchOptions,\n      jsonRpcRequest.method,\n    );\n  }\n\n  /**\n   * Constructs a default set of options to `fetch`.\n   *\n   * If a username and password are present in the URL, they are extracted to an\n   * Authorization header.\n   *\n   * @param endpointUrl - The endpoint URL.\n   * @param fetchOptions - The options to `fetch`.\n   * @param givenBtoa - An implementation of `btoa`.\n   * @returns The default fetch options.\n   */\n  #getDefaultFetchOptions(\n    endpointUrl: URL,\n    fetchOptions: FetchOptions,\n    givenBtoa: (stringToEncode: string) => string,\n  ): FetchOptions {\n    if (endpointUrl.username && endpointUrl.password) {\n      const authString = `${endpointUrl.username}:${endpointUrl.password}`;\n      const encodedCredentials = givenBtoa(authString);\n      return deepmerge(fetchOptions, {\n        headers: { Authorization: `Basic ${encodedCredentials}` },\n      });\n    }\n\n    return fetchOptions;\n  }\n\n  /**\n   * Constructs a final set of options to pass to `fetch`. Note that the method\n   * defaults to `post`, and the JSON-RPC request is automatically JSON-encoded.\n   *\n   * @param jsonRpcRequest - The JSON-RPC request.\n   * @param fetchOptions - Custom `fetch` options.\n   * @returns The complete set of `fetch` options.\n   */\n  #getCompleteFetchOptions<Params extends JsonRpcParams>(\n    jsonRpcRequest: Readonly<JsonRpcRequest<Params>>,\n    fetchOptions: FetchOptions,\n  ): FetchOptions {\n    const defaultOptions = {\n      method: 'POST',\n      headers: {\n        Accept: 'application/json',\n        'Content-Type': 'application/json',\n      },\n    };\n    const mergedOptions = deepmerge(\n      defaultOptions,\n      deepmerge(this.#fetchOptions, fetchOptions),\n    );\n\n    const { id, jsonrpc, method, params } = jsonRpcRequest;\n    const body = JSON.stringify({\n      id,\n      jsonrpc,\n      method,\n      params,\n    });\n\n    return { ...mergedOptions, body };\n  }\n\n  /**\n   * Makes the request using the Cockatiel policy that this service creates.\n   *\n   * @param fetchOptions - The options for `fetch`; will be combined with the\n   * fetch options passed to the constructor\n   * @param rpcMethodName - The JSON-RPC method name of the current request.\n   * @returns The decoded JSON-RPC response from the endpoint.\n   * @throws An \"authorized\" JSON-RPC error (code -32006) if the response HTTP status is 401.\n   * @throws A \"rate limiting\" JSON-RPC error (code -32005) if the response HTTP status is 429.\n   * @throws A \"resource unavailable\" JSON-RPC error (code -32002) if the response HTTP status is 402, 404, or any 5xx.\n   * @throws A generic HTTP client JSON-RPC error (code -32050) for any other 4xx HTTP status codes.\n   * @throws A \"parse\" JSON-RPC error (code -32700) if the response is not valid JSON.\n   */\n  async #executeAndProcessRequest<Result extends Json>(\n    fetchOptions: FetchOptions,\n    rpcMethodName: string,\n  ): Promise<JsonRpcResponse<Result> | JsonRpcResponse<null>> {\n    let response: Response | undefined;\n    try {\n      log(\n        `[${this.endpointUrl}] Circuit state`,\n        this.#policy.getCircuitState(),\n      );\n      const jsonDecodedResponse = await this.#policy.execute(\n        async (context) => {\n          // Reset response so that if this attempt throws before\n          // assigning a new response, the finally block does not read\n          // a stale response from a previous attempt.\n          response = undefined;\n          try {\n            log(\n              'REQUEST INITIATED:',\n              this.endpointUrl.toString(),\n              '::',\n              fetchOptions,\n              // @ts-expect-error This property _is_ here, the type of\n              // ServicePolicy is just wrong.\n              `(attempt ${context.attempt + 1})`,\n            );\n            response = await this.#fetch(this.endpointUrl, fetchOptions);\n            if (!response.ok) {\n              throw new HttpError(response.status);\n            }\n            log(\n              'REQUEST SUCCESSFUL:',\n              this.endpointUrl.toString(),\n              response.status,\n            );\n            return await response.json();\n          } finally {\n            // Track the RPC method and trace ID for the request that has just\n            // taken place. We pass these properties to `onDegraded` event\n            // listeners.\n            //\n            // We set these properties after the request completes and not\n            // before the request starts to account for race conditions. That\n            // is, if there are two requests that are being performed\n            // concurrently, and the second request fails fast but the first\n            // request succeeds slowly, when `onDegraded` is called we want it\n            // to include the first request as the RPC method, not the second.\n            //\n            // Also, we set these properties within a `finally` block inside of\n            // the function passed to `policy.execute` to ensure that they are\n            // set before `onDegraded` gets called, no matter the outcome of\n            // the request.\n            this.#currentRpcMethodName = rpcMethodName;\n            this.#currentTraceId =\n              response?.headers.get('X-Trace-Id') ?? undefined;\n          }\n        },\n      );\n      this.lastError = undefined;\n      return jsonDecodedResponse;\n    } catch (error) {\n      log('REQUEST ERROR:', this.endpointUrl.toString(), error);\n\n      this.lastError =\n        error instanceof Error ? error : new Error(getErrorMessage(error));\n\n      if (error instanceof HttpError) {\n        const status = error.httpStatus;\n        if (status === 401) {\n          throw new JsonRpcError(\n            CUSTOM_RPC_ERRORS.unauthorized,\n            'Unauthorized.',\n            {\n              httpStatus: status,\n            },\n          );\n        }\n        if (status === 429) {\n          throw rpcErrors.limitExceeded({\n            message: 'Request is being rate limited.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n        if (status >= 500 || status === 402 || status === 404) {\n          throw rpcErrors.resourceUnavailable({\n            message: 'RPC endpoint not found or unavailable.',\n            data: {\n              httpStatus: status,\n            },\n          });\n        }\n\n        // Handle all other 4xx errors as generic HTTP client errors\n        throw new JsonRpcError(\n          CUSTOM_RPC_ERRORS.httpClientError,\n          'RPC endpoint returned HTTP client error.',\n          {\n            httpStatus: status,\n          },\n        );\n      } else if (isJsonParseError(error)) {\n        throw rpcErrors.parse({\n          message: 'RPC endpoint did not return JSON.',\n        });\n      } else if (error instanceof BrokenCircuitError) {\n        this.#logger?.warn(error);\n        const remainingCircuitOpenDuration =\n          this.#policy.getRemainingCircuitOpenDuration();\n        const formattedRemainingCircuitOpenDuration = Intl.NumberFormat(\n          undefined,\n          { maximumFractionDigits: 2 },\n        ).format(\n          (remainingCircuitOpenDuration ?? this.#policy.circuitBreakDuration) /\n            Duration.Minute,\n        );\n        throw rpcErrors.resourceUnavailable({\n          message: `RPC endpoint returned too many errors, retrying in ${formattedRemainingCircuitOpenDuration} minutes. Consider using a different RPC endpoint.`,\n        });\n      }\n      throw error;\n    }\n  }\n}\n"]}

dist/types.cjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"types.cjs","sourceRoot":"","sources":["../src/types.ts"],"names":[],"mappings":";;;AAgBA;;GAEG;AACH,IAAY,iBAGX;AAHD,WAAY,iBAAiB;IAC3B,sCAAiB,CAAA;IACjB,sCAAiB,CAAA;AACnB,CAAC,EAHW,iBAAiB,iCAAjB,iBAAiB,QAG5B","sourcesContent":["import type { InfuraNetworkType } from '@metamask/controller-utils';\nimport type { BlockTracker as BaseBlockTracker } from '@metamask/eth-block-tracker';\nimport type { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport type { MiddlewareContext } from '@metamask/json-rpc-engine/v2';\nimport type { Hex } from '@metamask/utils';\n\nexport type Provider = InternalProvider<\n  MiddlewareContext<\n    { origin: string; skipCache: boolean } & Record<string, unknown>\n  >\n>;\n\nexport type BlockTracker = BaseBlockTracker & {\n  checkForLatestBlock(): Promise<string>;\n};\n\n/**\n * The type of network client that can be created.\n */\nexport enum NetworkClientType {\n  Custom = 'custom',\n  Infura = 'infura',\n}\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\ntype CommonNetworkClientConfiguration = {\n  chainId: Hex;\n  failoverRpcUrls?: string[];\n  ticker: string;\n};\n\n/**\n * A configuration object that can be used to create a client for a custom\n * network.\n */\nexport type CustomNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    rpcUrl: string;\n    type: NetworkClientType.Custom;\n  };\n\n/**\n * A configuration object that can be used to create a client for an Infura\n * network.\n */\nexport type InfuraNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    network: InfuraNetworkType;\n    infuraProjectId: string;\n    type: NetworkClientType.Infura;\n  };\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\nexport type NetworkClientConfiguration =\n  | CustomNetworkClientConfiguration\n  | InfuraNetworkClientConfiguration;\n"]}
+{"version":3,"file":"types.cjs","sourceRoot":"","sources":["../src/types.ts"],"names":[],"mappings":";;;AAeA;;GAEG;AACH,IAAY,iBAGX;AAHD,WAAY,iBAAiB;IAC3B,sCAAiB,CAAA;IACjB,sCAAiB,CAAA;AACnB,CAAC,EAHW,iBAAiB,iCAAjB,iBAAiB,QAG5B","sourcesContent":["import type { BlockTracker as BaseBlockTracker } from '@metamask/eth-block-tracker';\nimport type { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport type { MiddlewareContext } from '@metamask/json-rpc-engine/v2';\nimport type { Hex } from '@metamask/utils';\n\nexport type Provider = InternalProvider<\n  MiddlewareContext<\n    { origin: string; skipCache: boolean } & Record<string, unknown>\n  >\n>;\n\nexport type BlockTracker = BaseBlockTracker & {\n  checkForLatestBlock(): Promise<string>;\n};\n\n/**\n * The type of network client that can be created.\n */\nexport enum NetworkClientType {\n  Custom = 'custom',\n  Infura = 'infura',\n}\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\ntype CommonNetworkClientConfiguration = {\n  chainId: Hex;\n  failoverRpcUrls?: string[];\n  ticker: string;\n};\n\n/**\n * A configuration object that can be used to create a client for a custom\n * network.\n */\nexport type CustomNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    rpcUrl: string;\n    type: NetworkClientType.Custom;\n  };\n\n/**\n * A configuration object that can be used to create a client for an Infura\n * network.\n */\nexport type InfuraNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    network: string;\n    infuraProjectId: string;\n    type: NetworkClientType.Infura;\n  };\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\nexport type NetworkClientConfiguration =\n  | CustomNetworkClientConfiguration\n  | InfuraNetworkClientConfiguration;\n"]}

dist/types.d.cts

@@ -1,2 +0,1 @@
-import type { InfuraNetworkType } from "@metamask/controller-utils";
 import type { BlockTracker as BaseBlockTracker } from "@metamask/eth-block-tracker";
@@ -41,3 +40,3 @@ import type { InternalProvider } from "@metamask/eth-json-rpc-provider";
 export type InfuraNetworkClientConfiguration = CommonNetworkClientConfiguration & {
-    network: InfuraNetworkType;
+    network: string;
     infuraProjectId: string;
@@ -44,0 +43,0 @@ type: NetworkClientType.Infura;

dist/types.d.cts.map

@@ -1,1 +0,1 @@
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dist/types.d.mts

@@ -1,2 +0,1 @@
-import type { InfuraNetworkType } from "@metamask/controller-utils";
 import type { BlockTracker as BaseBlockTracker } from "@metamask/eth-block-tracker";
@@ -41,3 +40,3 @@ import type { InternalProvider } from "@metamask/eth-json-rpc-provider";
 export type InfuraNetworkClientConfiguration = CommonNetworkClientConfiguration & {
-    network: InfuraNetworkType;
+    network: string;
     infuraProjectId: string;
@@ -44,0 +43,0 @@ type: NetworkClientType.Infura;

dist/types.d.mts.map

@@ -1,1 +0,1 @@
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dist/types.mjs.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"types.mjs","sourceRoot":"","sources":["../src/types.ts"],"names":[],"mappings":"AAgBA;;GAEG;AACH,MAAM,CAAN,IAAY,iBAGX;AAHD,WAAY,iBAAiB;IAC3B,sCAAiB,CAAA;IACjB,sCAAiB,CAAA;AACnB,CAAC,EAHW,iBAAiB,KAAjB,iBAAiB,QAG5B","sourcesContent":["import type { InfuraNetworkType } from '@metamask/controller-utils';\nimport type { BlockTracker as BaseBlockTracker } from '@metamask/eth-block-tracker';\nimport type { InternalProvider } from '@metamask/eth-json-rpc-provider';\nimport type { MiddlewareContext } from '@metamask/json-rpc-engine/v2';\nimport type { Hex } from '@metamask/utils';\n\nexport type Provider = InternalProvider<\n  MiddlewareContext<\n    { origin: string; skipCache: boolean } & Record<string, unknown>\n  >\n>;\n\nexport type BlockTracker = BaseBlockTracker & {\n  checkForLatestBlock(): Promise<string>;\n};\n\n/**\n * The type of network client that can be created.\n */\nexport enum NetworkClientType {\n  Custom = 'custom',\n  Infura = 'infura',\n}\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\ntype CommonNetworkClientConfiguration = {\n  chainId: Hex;\n  failoverRpcUrls?: string[];\n  ticker: string;\n};\n\n/**\n * A configuration object that can be used to create a client for a custom\n * network.\n */\nexport type CustomNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    rpcUrl: string;\n    type: NetworkClientType.Custom;\n  };\n\n/**\n * A configuration object that can be used to create a client for an Infura\n * network.\n */\nexport type InfuraNetworkClientConfiguration =\n  CommonNetworkClientConfiguration & {\n    network: InfuraNetworkType;\n    infuraProjectId: string;\n    type: NetworkClientType.Infura;\n  };\n\n/**\n * A configuration object that can be used to create a client for a network.\n */\nexport type NetworkClientConfiguration =\n  | CustomNetworkClientConfiguration\n  | InfuraNetworkClientConfiguration;\n"]}
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LICENSE

@@ -21,1 +21,2 @@ MIT License
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

package.json

 {
   "name": "@metamask/network-controller",
-  "version": "34.0.0",
+  "version": "35.0.0",
   "description": "Provides an interface to the currently selected network via a MetaMask-compatible provider object",
@@ -47,4 +47,6 @@ "keywords": [
     "changelog:validate": "../../scripts/validate-changelog.sh @metamask/network-controller",
-    "messenger-action-types:check": "tsx ../../packages/messenger-cli/src/cli.ts --formatter oxfmt --check",
-    "messenger-action-types:generate": "tsx ../../packages/messenger-cli/src/cli.ts --formatter oxfmt --generate",
+    "lint:tsconfigs": "tsx ../../scripts/lint-tsconfigs/lint-tsconfigs.mts",
+    "lint:tsconfigs:fix": "tsx ../../scripts/lint-tsconfigs/lint-tsconfigs.mts --fix",
+    "messenger-action-types:check": "tsx ../../packages/messenger-cli/src/cli.ts --formatter oxfmt --esm --check",
+    "messenger-action-types:generate": "tsx ../../packages/messenger-cli/src/cli.ts --formatter oxfmt --esm --generate",
     "since-latest-release": "../../scripts/since-latest-release.sh",
@@ -57,4 +59,5 @@ "test": "NODE_OPTIONS=--experimental-vm-modules jest --reporters=jest-silent-reporter",
   "dependencies": {
+    "@metamask/analytics-controller": "^2.0.0",
     "@metamask/base-controller": "^9.1.0",
-    "@metamask/connectivity-controller": "^0.2.0",
+    "@metamask/connectivity-controller": "^0.3.0",
     "@metamask/controller-utils": "^12.3.0",
@@ -67,4 +70,4 @@ "@metamask/eth-block-tracker": "^15.0.1",
     "@metamask/json-rpc-engine": "^10.5.0",
-    "@metamask/messenger": "^1.2.0",
-    "@metamask/remote-feature-flag-controller": "^4.2.2",
+    "@metamask/messenger": "^2.0.0",
+    "@metamask/remote-feature-flag-controller": "^5.0.0",
     "@metamask/rpc-errors": "^7.0.2",
@@ -85,3 +88,3 @@ "@metamask/swappable-obj-proxy": "^2.3.0",
     "@types/deep-freeze-strict": "^1.1.0",
-    "@types/jest": "^29.5.14",
+    "@types/jest": "^30.0.0",
     "@types/jest-when": "^2.7.3",
@@ -93,9 +96,9 @@ "@types/lodash": "^4.14.191",
     "deepmerge": "^4.2.2",
-    "jest": "^29.7.0",
-    "jest-environment-jsdom": "^29.7.0",
-    "jest-when": "^3.4.2",
+    "jest": "^30.4.2",
+    "jest-environment-jsdom": "^30.4.1",
+    "jest-when": "^3.7.0",
     "lodash": "^4.17.21",
     "nock": "^13.3.1",
     "node-fetch": "^2.7.0",
-    "ts-jest": "^29.2.5",
+    "ts-jest": "^29.4.11",
     "tsx": "^4.20.5",
@@ -102,0 +105,0 @@ "typedoc": "^0.25.13",

No alert changes

Improved metrics

Total package byte prevSize

1272235

3.97%

Number of package files

124

6.9%

Lines of code

6503

4.43%

Worsened metrics

Dependency count

21

5%

Dependency changes

• + Added

  @metamask/analytics-controller@^2.0.0

• + Added

  @metamask/analytics-controller@2.0.0
  (transitive)

• + Added

  @metamask/connectivity-controller@0.3.0
  (transitive)

• + Added

  @metamask/geolocation-controller@1.0.0
  (transitive)

• + Added

  @metamask/messenger@2.0.0
  (transitive)

• + Added

  @metamask/remote-feature-flag-controller@5.0.0
  (transitive)

• - Removed

  @metamask/connectivity-controller@0.2.0
  (transitive)

• - Removed

  @metamask/remote-feature-flag-controller@4.2.2
  (transitive)

• Updated

  @metamask/connectivity-controller@^0.3.0

• Updated

  @metamask/messenger@^2.0.0

• Updated

  @metamask/remote-feature-flag-controller@^5.0.0