@firebase/installations - npm Package Compare versions

Comparing version 0.1.3-canary.2e6c4aa to 0.1.3-canary.6045a08

dist/index.cjs.js

@@ -12,3 +12,3 @@ 'use strict';
 
-var version = "0.1.3-canary.2e6c4aa";
+var version = "0.1.3-canary.6045a08";
 
@@ -15,0 +15,0 @@ /**

dist/index.cjs.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.cjs.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get<ReturnType>(\n  appConfig: AppConfig\n): Promise<ReturnType | undefined> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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+{"version":3,"file":"index.cjs.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get(appConfig: AppConfig): Promise<unknown> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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dist/index.esm.js

@@ -7,3 +7,3 @@ import firebase from '@firebase/app';
 
-var version = "0.1.3-canary.2e6c4aa";
+var version = "0.1.3-canary.6045a08";
 
@@ -10,0 +10,0 @@ /**

dist/index.esm.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.esm.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get<ReturnType>(\n  appConfig: AppConfig\n): Promise<ReturnType | undefined> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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+{"version":3,"file":"index.esm.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get(appConfig: AppConfig): Promise<unknown> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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dist/index.esm2017.js

@@ -5,3 +5,3 @@ import firebase from '@firebase/app';
 
-const version = "0.1.3-canary.2e6c4aa";
+const version = "0.1.3-canary.6045a08";
 
@@ -8,0 +8,0 @@ /**

dist/index.esm2017.js.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"index.esm2017.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get<ReturnType>(\n  appConfig: AppConfig\n): Promise<ReturnType | undefined> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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+{"version":3,"file":"index.esm2017.js","sources":["../src/util/constants.ts","../src/util/errors.ts","../src/helpers/extract-app-config.ts","../src/api/common.ts","../src/api/create-installation.ts","../src/util/sleep.ts","../src/helpers/buffer-to-base64-url-safe.ts","../src/helpers/generate-fid.ts","../src/helpers/idb-manager.ts","../src/helpers/get-installation-entry.ts","../src/functions/get-id.ts","../src/api/generate-auth-token.ts","../src/functions/get-token.ts","../src/api/delete-installation.ts","../src/functions/delete-installation.ts","../src/functions/index.ts","../src/index.ts"],"sourcesContent":["/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { version } from '../../package.json';\n\nexport const PENDING_TIMEOUT_MS = 10000;\n\nexport const PACKAGE_VERSION = `w:${version}`;\nexport const INTERNAL_AUTH_VERSION = 'FIS_v2';\n\nexport const INSTALLATIONS_API_URL =\n  'https://firebaseinstallations.googleapis.com/v1';\n\nexport const TOKEN_EXPIRATION_BUFFER = 60 * 60 * 1000; // One hour\n\nexport const SERVICE = 'installations';\nexport const SERVICE_NAME = 'Installations';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { ErrorFactory, FirebaseError } from '@firebase/util';\nimport { SERVICE, SERVICE_NAME } from './constants';\n\nexport const enum ErrorCode {\n  MISSING_APP_CONFIG_VALUES = 'missing-app-config-values',\n  CREATE_INSTALLATION_FAILED = 'create-installation-failed',\n  GENERATE_TOKEN_FAILED = 'generate-token-failed',\n  NOT_REGISTERED = 'not-registered',\n  INSTALLATION_NOT_FOUND = 'installation-not-found',\n  REQUEST_FAILED = 'request-failed',\n  APP_OFFLINE = 'app-offline',\n  DELETE_PENDING_REGISTRATION = 'delete-pending-registration'\n}\n\nconst ERROR_DESCRIPTION_MAP: { readonly [key in ErrorCode]: string } = {\n  [ErrorCode.MISSING_APP_CONFIG_VALUES]: 'Missing App configuration values.',\n  [ErrorCode.CREATE_INSTALLATION_FAILED]:\n    'Could not register Firebase Installation.',\n  [ErrorCode.GENERATE_TOKEN_FAILED]: 'Could not generate Auth Token.',\n  [ErrorCode.NOT_REGISTERED]: 'Firebase Installation is not registered.',\n  [ErrorCode.INSTALLATION_NOT_FOUND]: 'Firebase Installation not found.',\n  [ErrorCode.REQUEST_FAILED]:\n    '{$requestName} request failed with error \"{$serverCode} {$serverStatus}: {$serverMessage}\"',\n  [ErrorCode.APP_OFFLINE]: 'Could not process request. Application offline.',\n  [ErrorCode.DELETE_PENDING_REGISTRATION]:\n    \"Can't delete installation while there is a pending registration request.\"\n};\n\ninterface ErrorParams {\n  [ErrorCode.REQUEST_FAILED]: {\n    requestName: string;\n  } & ServerErrorData;\n}\n\nexport const ERROR_FACTORY = new ErrorFactory<ErrorCode, ErrorParams>(\n  SERVICE,\n  SERVICE_NAME,\n  ERROR_DESCRIPTION_MAP\n);\n\nexport interface ServerErrorData {\n  serverCode: number;\n  serverMessage: string;\n  serverStatus: string;\n}\n\nexport type ServerError = FirebaseError & ServerErrorData;\n\n/** Returns true if error is a FirebaseError that is based on an error from the server. */\nexport function isServerError(error: unknown): error is ServerError {\n  return (\n    error instanceof FirebaseError &&\n    error.code.includes(ErrorCode.REQUEST_FAILED)\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { AppConfig } from '../interfaces/app-config';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function extractAppConfig(app: FirebaseApp): AppConfig {\n  if (!app || !app.options) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  const appName = app.name;\n  const { projectId, apiKey, appId } = app.options;\n\n  if (!appName || !projectId || !apiKey || !appId) {\n    throw ERROR_FACTORY.create(ErrorCode.MISSING_APP_CONFIG_VALUES);\n  }\n\n  return { appName, projectId, apiKey, appId };\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseError } from '@firebase/util';\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport {\n  INSTALLATIONS_API_URL,\n  INTERNAL_AUTH_VERSION\n} from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport function getInstallationsEndpoint({ projectId }: AppConfig): string {\n  return `${INSTALLATIONS_API_URL}/projects/${projectId}/installations`;\n}\n\nexport function extractAuthTokenInfoFromResponse(\n  response: GenerateAuthTokenResponse\n): CompletedAuthToken {\n  return {\n    token: response.token,\n    requestStatus: RequestStatus.COMPLETED,\n    expiresIn: getExpiresInFromResponseExpiresIn(response.expiresIn),\n    creationTime: Date.now()\n  };\n}\n\nexport async function getErrorFromResponse(\n  requestName: string,\n  response: Response\n): Promise<FirebaseError> {\n  const responseJson = await response.json();\n  const errorData = responseJson.error;\n  return ERROR_FACTORY.create(ErrorCode.REQUEST_FAILED, {\n    requestName,\n    serverCode: errorData.code,\n    serverMessage: errorData.message,\n    serverStatus: errorData.status\n  });\n}\n\nexport function getHeaders({ apiKey }: AppConfig): Headers {\n  return new Headers({\n    'Content-Type': 'application/json',\n    Accept: 'application/json',\n    'x-goog-api-key': apiKey\n  });\n}\n\nexport function getHeadersWithAuth(\n  appConfig: AppConfig,\n  { refreshToken }: RegisteredInstallationEntry\n): Headers {\n  const headers = getHeaders(appConfig);\n  headers.append('Authorization', getAuthorizationHeader(refreshToken));\n  return headers;\n}\n\nexport interface ErrorData {\n  code: number;\n  message: string;\n  status: string;\n}\n\nfunction getExpiresInFromResponseExpiresIn(responseExpiresIn: string): number {\n  // This works because the server will never respond with fractions of a second.\n  return Number(responseExpiresIn.replace('s', '000'));\n}\n\nfunction getAuthorizationHeader(refreshToken: string): string {\n  return `${INTERNAL_AUTH_VERSION} ${refreshToken}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { CreateInstallationResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { INTERNAL_AUTH_VERSION, PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeaders,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function createInstallation(\n  appConfig: AppConfig,\n  { fid }: InProgressInstallationEntry\n): Promise<RegisteredInstallationEntry> {\n  const endpoint = getInstallationsEndpoint(appConfig);\n\n  const headers = getHeaders(appConfig);\n  const body = {\n    fid,\n    authVersion: INTERNAL_AUTH_VERSION,\n    appId: appConfig.appId,\n    sdkVersion: PACKAGE_VERSION\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: CreateInstallationResponse = await response.json();\n    const registeredInstallationEntry: RegisteredInstallationEntry = {\n      fid,\n      registrationStatus: RequestStatus.COMPLETED,\n      refreshToken: responseValue.refreshToken,\n      authToken: extractAuthTokenInfoFromResponse(responseValue.authToken)\n    };\n    return registeredInstallationEntry;\n  } else {\n    throw await getErrorFromResponse('Create Installation', response);\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n/** Returns a promise that resolves after given time passes. */\nexport function sleep(ms: number): Promise<void> {\n  return new Promise<void>(resolve => {\n    setTimeout(resolve, ms);\n  });\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport function bufferToBase64UrlSafe(\n  buffer: ArrayBuffer | Uint8Array\n): string {\n  const array = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);\n  const b64 = btoa(String.fromCharCode(...array));\n  return b64.replace(/\\+/g, '-').replace(/\\//g, '_');\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { bufferToBase64UrlSafe } from './buffer-to-base64-url-safe';\n\n/** Generates a new FID using random values from Web Crypto API. */\nexport function generateFid(): string {\n  // A valid FID has exactly 22 base64 characters, which is 132 bits, or 16.5\n  // bytes. our implementation generates a 17 byte array instead.\n  const fidByteArray = new Uint8Array(17);\n  crypto.getRandomValues(fidByteArray);\n\n  // Replace the first 4 random bits with the constant FID header of 0b0111.\n  fidByteArray[0] = 0b01110000 + (fidByteArray[0] % 0b00010000);\n\n  return encode(fidByteArray);\n}\n\n/** Converts a FID Uint8Array to a base64 string representation. */\nfunction encode(fidByteArray: Uint8Array): string {\n  const b64String = bufferToBase64UrlSafe(fidByteArray);\n\n  // Remove the 23rd character that was added because of the extra 4 bits at the\n  // end of our 17 byte array, and the '=' padding.\n  return b64String.substr(0, 22);\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { DB, openDb } from 'idb';\nimport { AppConfig } from '../interfaces/app-config';\n\nconst DATABASE_NAME = 'firebase-installations-database';\nconst DATABASE_VERSION = 1;\nconst OBJECT_STORE_NAME = 'firebase-installations-store';\n\nconst dbPromise: Promise<DB> = openDb(\n  DATABASE_NAME,\n  DATABASE_VERSION,\n  upgradeDB => {\n    // We don't use 'break' in this switch statement, the fall-through\n    // behavior is what we want, because if there are multiple versions between\n    // the old version and the current version, we want ALL the migrations\n    // that correspond to those versions to run, not only the last one.\n    switch (upgradeDB.oldVersion) {\n      case 0:\n        upgradeDB.createObjectStore(OBJECT_STORE_NAME);\n    }\n  }\n);\n\n/** Gets record(s) from the objectStore that match the given key. */\nexport async function get(appConfig: AppConfig): Promise<unknown> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  return db\n    .transaction(OBJECT_STORE_NAME)\n    .objectStore(OBJECT_STORE_NAME)\n    .get(key);\n}\n\n/** Assigns or overwrites the record for the given key with the given value. */\nexport async function set<ValueType>(\n  appConfig: AppConfig,\n  value: ValueType\n): Promise<ValueType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).put(value, key);\n  await tx.complete;\n  return value;\n}\n\n/** Removes record(s) from the objectStore that match the given key. */\nexport async function remove(appConfig: AppConfig): Promise<void> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).delete(key);\n  return tx.complete;\n}\n\n/**\n * Atomically updates a record with the result of updateFn, which gets\n * called with the current value. If newValue is undefined, the record is\n * deleted instead.\n * @return Updated value\n */\nexport async function update<OldType, NewType>(\n  appConfig: AppConfig,\n  updateFn: (previousValue: OldType | undefined) => NewType\n): Promise<NewType> {\n  const key = getKey(appConfig);\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  const store = tx.objectStore(OBJECT_STORE_NAME);\n  const oldValue = await store.get(key);\n  const newValue = updateFn(oldValue);\n\n  if (newValue === oldValue) {\n    return newValue;\n  }\n\n  if (newValue === undefined) {\n    store.delete(key);\n  } else {\n    store.put(newValue, key);\n  }\n\n  await tx.complete;\n  return newValue;\n}\n\nexport async function clear(): Promise<void> {\n  const db = await dbPromise;\n  const tx = db.transaction(OBJECT_STORE_NAME, 'readwrite');\n  tx.objectStore(OBJECT_STORE_NAME).clear();\n  return tx.complete;\n}\n\nfunction getKey(appConfig: AppConfig): string {\n  return `${appConfig.appName}!${appConfig.appId}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { createInstallation } from '../api/create-installation';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\nimport { generateFid } from './generate-fid';\nimport { remove, set, update } from './idb-manager';\n\nexport interface InstallationEntryWithRegistrationPromise {\n  installationEntry: InstallationEntry;\n  registrationPromise?: Promise<void>;\n}\n\n/**\n * Updates and returns the InstallationEntry from the database.\n * Also triggers a registration request if it is necessary and possible.\n */\nexport async function getInstallationEntry(\n  appConfig: AppConfig\n): Promise<InstallationEntryWithRegistrationPromise> {\n  let registrationPromise: Promise<void> | undefined;\n\n  return {\n    installationEntry: await update(\n      appConfig,\n      (oldEntry?: InstallationEntry): InstallationEntry => {\n        const installationEntry = updateOrCreateFid(oldEntry);\n        const entryWithPromise = triggerRegistrationIfNecessary(\n          appConfig,\n          installationEntry\n        );\n        registrationPromise = entryWithPromise.registrationPromise;\n        return entryWithPromise.installationEntry;\n      }\n    ),\n    registrationPromise\n  };\n}\n\nfunction updateOrCreateFid(\n  oldEntry: InstallationEntry | undefined\n): InstallationEntry {\n  const entry: InstallationEntry = oldEntry || {\n    fid: generateFid(),\n    registrationStatus: RequestStatus.NOT_STARTED\n  };\n\n  if (hasInstallationRequestTimedOut(entry)) {\n    return {\n      fid: entry.fid,\n      registrationStatus: RequestStatus.NOT_STARTED\n    };\n  }\n\n  return entry;\n}\n\n/**\n * If the Firebase Installation is not registered yet, this will trigger the registration\n * and return an InProgressInstallationEntry.\n */\nfunction triggerRegistrationIfNecessary(\n  appConfig: AppConfig,\n  installationEntry: InstallationEntry\n): InstallationEntryWithRegistrationPromise {\n  if (installationEntry.registrationStatus === RequestStatus.NOT_STARTED) {\n    if (!navigator.onLine) {\n      // Registration required but app is offline.\n      const registrationPromiseWithError = Promise.reject(\n        ERROR_FACTORY.create(ErrorCode.APP_OFFLINE)\n      );\n      return {\n        installationEntry,\n        registrationPromise: registrationPromiseWithError\n      };\n    }\n\n    // Try registering. Change status to IN_PROGRESS.\n    const inProgressEntry: InProgressInstallationEntry = {\n      fid: installationEntry.fid,\n      registrationStatus: RequestStatus.IN_PROGRESS,\n      registrationTime: Date.now()\n    };\n    const registrationPromise = registerInstallation(\n      appConfig,\n      inProgressEntry\n    );\n    return { installationEntry: inProgressEntry, registrationPromise };\n  } else if (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS\n  ) {\n    return {\n      installationEntry,\n      registrationPromise: waitUntilFidRegistration(appConfig)\n    };\n  } else {\n    return { installationEntry };\n  }\n}\n\n/** This will be executed only once for each new Firebase Installation. */\nasync function registerInstallation(\n  appConfig: AppConfig,\n  installationEntry: InProgressInstallationEntry\n): Promise<void> {\n  try {\n    const registeredInstallationEntry = await createInstallation(\n      appConfig,\n      installationEntry\n    );\n    await set(appConfig, registeredInstallationEntry);\n  } catch (e) {\n    if (isServerError(e) && e.serverCode === 409) {\n      // Server returned a \"FID can not be used\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      // Registration failed. Set FID as not registered.\n      await set(appConfig, {\n        fid: installationEntry.fid,\n        registrationStatus: RequestStatus.NOT_STARTED\n      });\n    }\n    throw e;\n  }\n}\n\n/** Call if FID registration is pending. */\nasync function waitUntilFidRegistration(appConfig: AppConfig): Promise<void> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry: InstallationEntry = await updateInstallationRequest(appConfig);\n  while (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n    // createInstallation request still in progress.\n    await sleep(100);\n\n    entry = await updateInstallationRequest(appConfig);\n  }\n\n  if (entry.registrationStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\n/**\n * Called only if there is a CreateInstallation request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * CreateInstallation request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateInstallationRequest(\n  appConfig: AppConfig\n): Promise<InstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): InstallationEntry => {\n      if (!oldEntry) {\n        throw ERROR_FACTORY.create(ErrorCode.INSTALLATION_NOT_FOUND);\n      }\n\n      if (hasInstallationRequestTimedOut(oldEntry)) {\n        return {\n          fid: oldEntry.fid,\n          registrationStatus: RequestStatus.NOT_STARTED\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nfunction hasInstallationRequestTimedOut(\n  installationEntry: InstallationEntry\n): boolean {\n  return (\n    installationEntry.registrationStatus === RequestStatus.IN_PROGRESS &&\n    installationEntry.registrationTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\n\nexport async function getId(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n  if (registrationPromise) {\n    // Suppress registration errors as they are not a problem for getId.\n    registrationPromise.catch(() => {});\n  }\n  return installationEntry.fid;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { GenerateAuthTokenResponse } from '../interfaces/api-response';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  CompletedAuthToken,\n  RegisteredInstallationEntry\n} from '../interfaces/installation-entry';\nimport { PACKAGE_VERSION } from '../util/constants';\nimport {\n  extractAuthTokenInfoFromResponse,\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function generateAuthToken(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  const endpoint = getGenerateAuthTokenEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const body = {\n    installation: {\n      sdkVersion: PACKAGE_VERSION\n    }\n  };\n\n  const request: RequestInit = {\n    method: 'POST',\n    headers,\n    body: JSON.stringify(body)\n  };\n\n  const response = await fetch(endpoint, request);\n  if (response.ok) {\n    const responseValue: GenerateAuthTokenResponse = await response.json();\n    const completedAuthToken: CompletedAuthToken = extractAuthTokenInfoFromResponse(\n      responseValue\n    );\n    return completedAuthToken;\n  } else {\n    throw await getErrorFromResponse('Generate Auth Token', response);\n  }\n}\n\nfunction getGenerateAuthTokenEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}/authTokens:generate`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { generateAuthToken } from '../api/generate-auth-token';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { getInstallationEntry } from '../helpers/get-installation-entry';\nimport { remove, set, update } from '../helpers/idb-manager';\nimport { AppConfig } from '../interfaces/app-config';\nimport {\n  AuthToken,\n  CompletedAuthToken,\n  InProgressAuthToken,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { PENDING_TIMEOUT_MS, TOKEN_EXPIRATION_BUFFER } from '../util/constants';\nimport { ERROR_FACTORY, ErrorCode, isServerError } from '../util/errors';\nimport { sleep } from '../util/sleep';\n\nexport async function getToken(app: FirebaseApp): Promise<string> {\n  const appConfig = extractAppConfig(app);\n\n  await completeInstallationRegistration(appConfig);\n\n  // At this point we either have a Registered Installation in the DB, or we've\n  // already thrown an error.\n  return fetchAuthToken(appConfig);\n}\n\nasync function completeInstallationRegistration(\n  appConfig: AppConfig\n): Promise<void> {\n  const { installationEntry, registrationPromise } = await getInstallationEntry(\n    appConfig\n  );\n\n  if (registrationPromise) {\n    // A createInstallation request is in progress. Wait until it finishes.\n    await registrationPromise;\n  } else if (installationEntry.registrationStatus !== RequestStatus.COMPLETED) {\n    // Installation ID can't be registered.\n    throw ERROR_FACTORY.create(ErrorCode.CREATE_INSTALLATION_FAILED);\n  }\n}\n\nasync function fetchAuthToken(appConfig: AppConfig): Promise<string> {\n  let tokenPromise: Promise<CompletedAuthToken> | undefined;\n  const entry = await update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (isAuthTokenValid(oldAuthToken)) {\n        // There is a valid token in the DB.\n        return oldEntry;\n      } else if (oldAuthToken.requestStatus === RequestStatus.IN_PROGRESS) {\n        // There already is a token request in progress.\n        tokenPromise = waitUntilAuthTokenRequest(appConfig);\n        return oldEntry;\n      } else {\n        // No token or token expired.\n        if (!navigator.onLine) {\n          throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n        }\n\n        const inProgressEntry = makeAuthTokenRequestInProgressEntry(oldEntry);\n        tokenPromise = fetchAuthTokenFromServer(appConfig, inProgressEntry);\n        return inProgressEntry;\n      }\n    }\n  );\n\n  const authToken: CompletedAuthToken = tokenPromise\n    ? await tokenPromise\n    : (entry.authToken as CompletedAuthToken);\n  return authToken.token;\n}\n\n/**\n * Call only if FID is registered and Auth Token request is in progress.\n */\nasync function waitUntilAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<CompletedAuthToken> {\n  // Unfortunately, there is no way of reliably observing when a value in\n  // IndexedDB changes (yet, see https://github.com/WICG/indexed-db-observers),\n  // so we need to poll.\n\n  let entry = await updateAuthTokenRequest(appConfig);\n  while (entry.authToken.requestStatus === RequestStatus.IN_PROGRESS) {\n    // generateAuthToken still in progress.\n    await sleep(100);\n\n    entry = await updateAuthTokenRequest(appConfig);\n  }\n\n  const authToken = entry.authToken;\n  if (authToken.requestStatus === RequestStatus.NOT_STARTED) {\n    throw ERROR_FACTORY.create(ErrorCode.GENERATE_TOKEN_FAILED);\n  } else {\n    return authToken;\n  }\n}\n\n/**\n * Called only if there is a GenerateAuthToken request in progress.\n *\n * Updates the InstallationEntry in the DB based on the status of the\n * GenerateAuthToken request.\n *\n * Returns the updated InstallationEntry.\n */\nfunction updateAuthTokenRequest(\n  appConfig: AppConfig\n): Promise<RegisteredInstallationEntry> {\n  return update(\n    appConfig,\n    (oldEntry?: InstallationEntry): RegisteredInstallationEntry => {\n      if (!isEntryRegistered(oldEntry)) {\n        throw ERROR_FACTORY.create(ErrorCode.NOT_REGISTERED);\n      }\n\n      const oldAuthToken = oldEntry.authToken;\n      if (hasAuthTokenRequestTimedOut(oldAuthToken)) {\n        return {\n          ...oldEntry,\n          authToken: { requestStatus: RequestStatus.NOT_STARTED }\n        };\n      }\n\n      return oldEntry;\n    }\n  );\n}\n\nasync function fetchAuthTokenFromServer(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<CompletedAuthToken> {\n  try {\n    const authToken = await generateAuthToken(appConfig, installationEntry);\n    const updatedInstallationEntry: RegisteredInstallationEntry = {\n      ...installationEntry,\n      authToken\n    };\n    await set(appConfig, updatedInstallationEntry);\n    return authToken;\n  } catch (e) {\n    if (isServerError(e) && (e.serverCode === 401 || e.serverCode === 404)) {\n      // Server returned a \"FID not found\" or a \"Invalid authentication\" error.\n      // Generate a new ID next time.\n      await remove(appConfig);\n    } else {\n      const updatedInstallationEntry: RegisteredInstallationEntry = {\n        ...installationEntry,\n        authToken: { requestStatus: RequestStatus.NOT_STARTED }\n      };\n      await set(appConfig, updatedInstallationEntry);\n    }\n    throw e;\n  }\n}\n\nfunction isEntryRegistered(\n  installationEntry: InstallationEntry | undefined\n): installationEntry is RegisteredInstallationEntry {\n  return (\n    installationEntry !== undefined &&\n    installationEntry.registrationStatus === RequestStatus.COMPLETED\n  );\n}\n\nfunction isAuthTokenValid(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.COMPLETED &&\n    !isAuthTokenExpired(authToken)\n  );\n}\n\nfunction isAuthTokenExpired(authToken: CompletedAuthToken): boolean {\n  const now = Date.now();\n  return (\n    now < authToken.creationTime ||\n    authToken.creationTime + authToken.expiresIn < now + TOKEN_EXPIRATION_BUFFER\n  );\n}\n\n/** Returns an updated InstallationEntry with an InProgressAuthToken. */\nfunction makeAuthTokenRequestInProgressEntry(\n  oldEntry: RegisteredInstallationEntry\n): RegisteredInstallationEntry {\n  const inProgressAuthToken: InProgressAuthToken = {\n    requestStatus: RequestStatus.IN_PROGRESS,\n    requestTime: Date.now()\n  };\n  return {\n    ...oldEntry,\n    authToken: inProgressAuthToken\n  };\n}\n\nfunction hasAuthTokenRequestTimedOut(authToken: AuthToken): boolean {\n  return (\n    authToken.requestStatus === RequestStatus.IN_PROGRESS &&\n    authToken.requestTime + PENDING_TIMEOUT_MS < Date.now()\n  );\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { AppConfig } from '../interfaces/app-config';\nimport { RegisteredInstallationEntry } from '../interfaces/installation-entry';\nimport {\n  getErrorFromResponse,\n  getHeadersWithAuth,\n  getInstallationsEndpoint\n} from './common';\n\nexport async function deleteInstallation(\n  appConfig: AppConfig,\n  installationEntry: RegisteredInstallationEntry\n): Promise<void> {\n  const endpoint = getDeleteEndpoint(appConfig, installationEntry);\n\n  const headers = getHeadersWithAuth(appConfig, installationEntry);\n  const request: RequestInit = {\n    method: 'DELETE',\n    headers\n  };\n\n  const response = await fetch(endpoint, request);\n  if (!response.ok) {\n    throw await getErrorFromResponse('Delete Installation', response);\n  }\n}\n\nfunction getDeleteEndpoint(\n  appConfig: AppConfig,\n  { fid }: RegisteredInstallationEntry\n): string {\n  return `${getInstallationsEndpoint(appConfig)}/${fid}`;\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport { FirebaseApp } from '@firebase/app-types';\nimport { deleteInstallation as deleteInstallationRequest } from '../api/delete-installation';\nimport { extractAppConfig } from '../helpers/extract-app-config';\nimport { remove, update } from '../helpers/idb-manager';\nimport {\n  InProgressInstallationEntry,\n  InstallationEntry,\n  RegisteredInstallationEntry,\n  RequestStatus\n} from '../interfaces/installation-entry';\nimport { ERROR_FACTORY, ErrorCode } from '../util/errors';\n\nexport async function deleteInstallation(app: FirebaseApp): Promise<void> {\n  const appConfig = extractAppConfig(app);\n\n  const entry = await update(\n    appConfig,\n    (\n      oldEntry?: InstallationEntry\n    ):\n      | InProgressInstallationEntry\n      | RegisteredInstallationEntry\n      | undefined => {\n      if (\n        oldEntry &&\n        oldEntry.registrationStatus === RequestStatus.NOT_STARTED\n      ) {\n        // Delete the unregistered entry without sending a deleteInstallation request.\n        return undefined;\n      }\n      return oldEntry;\n    }\n  );\n\n  if (entry) {\n    if (entry.registrationStatus === RequestStatus.IN_PROGRESS) {\n      // Can't delete while trying to register.\n      throw ERROR_FACTORY.create(ErrorCode.DELETE_PENDING_REGISTRATION);\n    } else if (entry.registrationStatus === RequestStatus.COMPLETED) {\n      if (!navigator.onLine) {\n        throw ERROR_FACTORY.create(ErrorCode.APP_OFFLINE);\n      } else {\n        await deleteInstallationRequest(appConfig, entry);\n        await remove(appConfig);\n      }\n    }\n  }\n}\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nexport { getId } from './get-id';\nexport { getToken } from './get-token';\nexport { deleteInstallation } from './delete-installation';\n","/**\n * @license\n * Copyright 2019 Google Inc.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n *   http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\nimport firebase from '@firebase/app';\nimport {\n  _FirebaseNamespace,\n  FirebaseServiceFactory\n} from '@firebase/app-types/private';\nimport { FirebaseInstallations } from '@firebase/installations-types';\n\nimport { deleteInstallation, getId, getToken } from './functions';\nimport { extractAppConfig } from './helpers/extract-app-config';\n\nexport function registerInstallations(instance: _FirebaseNamespace): void {\n  const installationsName = 'installations';\n\n  const factoryMethod: FirebaseServiceFactory = app => {\n    // Throws if app isn't configured properly.\n    extractAppConfig(app);\n\n    return {\n      app,\n      getId: () => getId(app),\n      getToken: () => getToken(app),\n      delete: () => deleteInstallation(app)\n    };\n  };\n\n  instance.INTERNAL.registerService(installationsName, factoryMethod);\n}\n\nregisterInstallations(firebase as _FirebaseNamespace);\n\n/**\n * Define extension behavior of `registerInstallations`\n */\ndeclare module '@firebase/app-types' {\n  interface FirebaseNamespace {\n    installations(app?: FirebaseApp): FirebaseInstallations;\n  }\n  interface FirebaseApp {\n    installations(): FirebaseInstallations;\n  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dist/src/helpers/idb-manager.d.ts

@@ -19,3 +19,3 @@ /**
 /** Gets record(s) from the objectStore that match the given key. */
-export declare function get<ReturnType>(appConfig: AppConfig): Promise<ReturnType | undefined>;
+export declare function get(appConfig: AppConfig): Promise<unknown>;
 /** Assigns or overwrites the record for the given key with the given value. */
@@ -22,0 +22,0 @@ export declare function set<ValueType>(appConfig: AppConfig, value: ValueType): Promise<ValueType>;

package.json

 {
   "name": "@firebase/installations",
-  "version": "0.1.3-canary.2e6c4aa",
+  "version": "0.1.3-canary.6045a08",
   "main": "dist/index.cjs.js",
@@ -48,8 +48,8 @@ "module": "dist/index.esm.js",
   "peerDependencies": {
-    "@firebase/app": "0.4.3-canary.2e6c4aa",
-    "@firebase/app-types": "0.4.0-canary.2e6c4aa"
+    "@firebase/app": "0.4.3-canary.6045a08",
+    "@firebase/app-types": "0.4.0-canary.6045a08"
   },
   "dependencies": {
-    "@firebase/installations-types": "0.1.1-canary.2e6c4aa",
-    "@firebase/util": "0.2.17-canary.2e6c4aa",
+    "@firebase/installations-types": "0.1.1-canary.6045a08",
+    "@firebase/util": "0.2.17-canary.6045a08",
     "idb": "3.0.2",
@@ -56,0 +56,0 @@ "tslib": "1.9.3"

src/functions/get-token.test.ts

@@ -232,14 +232,14 @@ /**
           const token = await getToken(app);
-          const installationEntry = await get<RegisteredInstallationEntry>(
+          const installationEntry = (await get(
             appConfig
-          );
+          )) as RegisteredInstallationEntry;
           expect(installationEntry).not.to.be.undefined;
-          expect(installationEntry!.registrationStatus).to.equal(
+          expect(installationEntry.registrationStatus).to.equal(
             RequestStatus.COMPLETED
           );
-          expect(installationEntry!.authToken.requestStatus).to.equal(
+          expect(installationEntry.authToken.requestStatus).to.equal(
             RequestStatus.COMPLETED
           );
           expect(
-            (installationEntry!.authToken as CompletedAuthToken).token
+            (installationEntry.authToken as CompletedAuthToken).token
           ).to.equal(token);
@@ -246,0 +246,0 @@ });

src/helpers/get-installation-entry.test.ts

@@ -24,3 +24,2 @@ /**
   InProgressInstallationEntry,
-  InstallationEntry,
   RegisteredInstallationEntry,
@@ -74,3 +73,3 @@ RequestStatus,
   it('saves the InstallationEntry in the database before returning it', async () => {
-    const oldDbEntry = await get<InstallationEntry>(appConfig);
+    const oldDbEntry = await get(appConfig);
     expect(oldDbEntry).to.be.undefined;
@@ -80,3 +79,3 @@
 
-    const newDbEntry = await get<InstallationEntry>(appConfig);
+    const newDbEntry = await get(appConfig);
     expect(newDbEntry).to.deep.equal(installationEntry);
@@ -88,3 +87,3 @@ });
 
-    const oldDbEntry = await get<InstallationEntry>(appConfig);
+    const oldDbEntry = await get(appConfig);
     expect(oldDbEntry).to.be.undefined;
@@ -94,3 +93,3 @@
 
-    const newDbEntry = await get<InstallationEntry>(appConfig);
+    const newDbEntry = await get(appConfig);
     expect(newDbEntry).to.deep.equal(installationEntry);
@@ -109,3 +108,3 @@ });
 
-    const oldDbEntry = await get<InstallationEntry>(appConfig);
+    const oldDbEntry = await get(appConfig);
     expect(oldDbEntry).to.deep.equal(installationEntry);
@@ -116,6 +115,4 @@
 
-    const newDbEntry = await get<InstallationEntry>(appConfig);
-    expect(newDbEntry!.registrationStatus).to.deep.equal(
-      RequestStatus.COMPLETED
-    );
+    const newDbEntry = (await get(appConfig)) as RegisteredInstallationEntry;
+    expect(newDbEntry.registrationStatus).to.equal(RequestStatus.COMPLETED);
   });
@@ -143,3 +140,3 @@
 
-    const oldDbEntry = await get<InstallationEntry>(appConfig);
+    const oldDbEntry = await get(appConfig);
     expect(oldDbEntry).to.deep.equal(installationEntry);
@@ -150,6 +147,4 @@
 
-    const newDbEntry = await get<InstallationEntry>(appConfig);
-    expect(newDbEntry!.registrationStatus).to.deep.equal(
-      RequestStatus.NOT_STARTED
-    );
+    const newDbEntry = (await get(appConfig)) as UnregisteredInstallationEntry;
+    expect(newDbEntry.registrationStatus).to.equal(RequestStatus.NOT_STARTED);
   });
@@ -176,3 +171,3 @@
 
-    const oldDbEntry = await get<InstallationEntry>(appConfig);
+    const oldDbEntry = await get(appConfig);
     expect(oldDbEntry).to.deep.equal(installationEntry);
@@ -183,3 +178,3 @@
 
-    const newDbEntry = await get<InstallationEntry>(appConfig);
+    const newDbEntry = await get(appConfig);
     expect(newDbEntry).to.be.undefined;
@@ -186,0 +181,0 @@ });

src/helpers/idb-manager.test.ts

@@ -36,3 +36,3 @@ /**
       await set(appConfig1, 'value');
-      const value = await get<string>(appConfig1);
+      const value = await get(appConfig1);
       expect(value).to.equal('value');
@@ -42,3 +42,3 @@ });
     it('gets undefined for a key that does not exist', async () => {
-      const value = await get<string>(appConfig1);
+      const value = await get(appConfig1);
       expect(value).to.be.undefined;
@@ -50,4 +50,4 @@ });
       await set(appConfig2, 'value2');
-      expect(await get<string>(appConfig1)).to.equal('value');
-      expect(await get<string>(appConfig2)).to.equal('value2');
+      expect(await get(appConfig1)).to.equal('value');
+      expect(await get(appConfig2)).to.equal('value2');
     });
@@ -58,3 +58,3 @@
       await set(appConfig1, 'newValue');
-      expect(await get<string>(appConfig1)).to.equal('newValue');
+      expect(await get(appConfig1)).to.equal('newValue');
     });
@@ -67,3 +67,3 @@ });
       await remove(appConfig1);
-      expect(await get<string>(appConfig1)).to.be.undefined;
+      expect(await get(appConfig1)).to.be.undefined;
     });
@@ -73,3 +73,3 @@
       await remove(appConfig1);
-      expect(await get<string>(appConfig1)).to.be.undefined;
+      expect(await get(appConfig1)).to.be.undefined;
     });
@@ -105,3 +105,3 @@ });
       // Called immediately after update, but before update completed.
-      const getPromise = get<string>(appConfig1);
+      const getPromise = get(appConfig1);
       isGetCalled = true;
@@ -132,3 +132,3 @@
       // Called immediately after update, but before update completed.
-      const getPromise = get<number>(appConfig1);
+      const getPromise = get(appConfig1);
       isGetCalled = true;
@@ -135,0 +135,0 @@

src/helpers/idb-manager.ts

@@ -41,5 +41,3 @@ /**
 /** Gets record(s) from the objectStore that match the given key. */
-export async function get<ReturnType>(
-  appConfig: AppConfig
-): Promise<ReturnType | undefined> {
+export async function get(appConfig: AppConfig): Promise<unknown> {
   const key = getKey(appConfig);
@@ -46,0 +44,0 @@ const db = await dbPromise;

New alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

Fixed alerts

Network access

Supply chain risk

This module accesses the network.

Found 1 instance in 1 package

Long strings

Supply chain risk

Contains long string literals, which may be a sign of obfuscated or packed code.

Found 1 instance in 1 package

Worsened metrics

Total package byte prevSize

625497

-0.07%

Lines of code

6896

-0.1%

Dependency changes

• + Added

  @firebase/app@0.4.3-canary.6045a08
  (transitive)

• + Added

  @firebase/app-types@0.4.0-canary.6045a08
  (transitive)

• + Added

  @firebase/installations-types@0.1.1-canary.6045a08
  (transitive)

• + Added

  @firebase/logger@0.1.14-canary.6045a08
  (transitive)

• + Added

  @firebase/util@0.2.17-canary.6045a08
  (transitive)

• - Removed

  @firebase/app@0.4.3-canary.2e6c4aa
  (transitive)

• - Removed

  @firebase/app-types@0.4.0-canary.2e6c4aa
  (transitive)

• - Removed

  @firebase/installations-types@0.1.1-canary.2e6c4aa
  (transitive)

• - Removed

  @firebase/logger@0.1.14-canary.2e6c4aa
  (transitive)

• - Removed

  @firebase/util@0.2.17-canary.2e6c4aa
  (transitive)

• Updated

  @firebase/installations-types@0.1.1-canary.6045a08

• Updated

  @firebase/util@0.2.17-canary.6045a08