@peerbit/stream - npm Package Compare versions

Comparing version 4.6.0-91f84d0 to 4.6.0-9b39434

dist/benchmark/directstream-sim.d.ts

+/**
+ * In-memory "real DirectStream" simulator.
+ *
+ * Goal: run most of @peerbit/stream's real logic (routing, ACK learning, dialer,
+ * pruning) but swap the underlying libp2p transport for a lightweight, in-memory
+ * shim so we can explore 100s–1000s of nodes.
+ *
+ * Run:
+ *   node --loader ts-node/esm ./packages/transport/stream/benchmark/directstream-sim.ts --nodes 200 --degree 4 --messages 20 --targets 5 --redundancy 2 --seed 1
+ */
+export {};
+//# sourceMappingURL=directstream-sim.d.ts.map

dist/benchmark/directstream-sim.d.ts.map

+{"version":3,"file":"directstream-sim.d.ts","sourceRoot":"","sources":["../../benchmark/directstream-sim.ts"],"names":[],"mappings":"AAAA;;;;;;;;;GASG"}

dist/benchmark/directstream-sim.js

+/**
+ * In-memory "real DirectStream" simulator.
+ *
+ * Goal: run most of @peerbit/stream's real logic (routing, ACK learning, dialer,
+ * pruning) but swap the underlying libp2p transport for a lightweight, in-memory
+ * shim so we can explore 100s–1000s of nodes.
+ *
+ * Run:
+ *   node --loader ts-node/esm ./packages/transport/stream/benchmark/directstream-sim.ts --nodes 200 --degree 4 --messages 20 --targets 5 --redundancy 2 --seed 1
+ */
+import { AcknowledgeDelivery } from "@peerbit/stream-interface";
+import { PreHash, SignatureWithKey } from "@peerbit/crypto";
+import { delay } from "@peerbit/time";
+import { DirectStream } from "../src/index.js";
+import { InMemoryConnectionManager, InMemoryNetwork, } from "@peerbit/libp2p-test-utils/inmemory-libp2p.js";
+const mulberry32 = (seed) => {
+    let t = seed >>> 0;
+    return () => {
+        t += 0x6d2b79f5;
+        let x = t;
+        x = Math.imul(x ^ (x >>> 15), x | 1);
+        x ^= x + Math.imul(x ^ (x >>> 7), x | 61);
+        return ((x ^ (x >>> 14)) >>> 0) / 4294967296;
+    };
+};
+const int = (rng, maxExclusive) => Math.floor(rng() * maxExclusive);
+const pickDistinct = (rng, n, k, exclude) => {
+    const out = new Set();
+    while (out.size < k) {
+        const candidate = int(rng, n);
+        if (candidate === exclude)
+            continue;
+        out.add(candidate);
+    }
+    return [...out];
+};
+const buildRandomGraph = (n, targetDegree, rng) => {
+    if (n <= 0)
+        throw new Error("nodes must be > 0");
+    if (targetDegree < 0)
+        throw new Error("degree must be >= 0");
+    if (targetDegree >= n) {
+        throw new Error("degree must be < nodes for a simple graph");
+    }
+    const adj = Array.from({ length: n }, () => new Set());
+    const degree = new Uint16Array(n);
+    const connect = (a, b) => {
+        if (a === b)
+            return false;
+        if (adj[a].has(b))
+            return false;
+        if (degree[a] >= targetDegree || degree[b] >= targetDegree)
+            return false;
+        adj[a].add(b);
+        adj[b].add(a);
+        degree[a] += 1;
+        degree[b] += 1;
+        return true;
+    };
+    // Seed connectivity.
+    if (targetDegree >= 2 && n >= 3) {
+        for (let i = 0; i < n; i++)
+            connect(i, (i + 1) % n);
+    }
+    else if (targetDegree >= 1 && n >= 2) {
+        for (let i = 0; i < n - 1; i++)
+            connect(i, i + 1);
+    }
+    const available = [];
+    const pos = new Int32Array(n).fill(-1);
+    for (let i = 0; i < n; i++) {
+        if (degree[i] < targetDegree) {
+            pos[i] = available.length;
+            available.push(i);
+        }
+    }
+    const removeAvailable = (id) => {
+        const p = pos[id];
+        if (p < 0)
+            return;
+        const last = available.pop();
+        if (last !== id) {
+            available[p] = last;
+            pos[last] = p;
+        }
+        pos[id] = -1;
+    };
+    const maxAttempts = n * Math.max(1, targetDegree) * 200;
+    let attempts = 0;
+    while (available.length > 1 && attempts < maxAttempts) {
+        attempts++;
+        const a = available[int(rng, available.length)];
+        const b = available[int(rng, available.length)];
+        if (a === b)
+            continue;
+        if (!connect(a, b))
+            continue;
+        if (degree[a] >= targetDegree)
+            removeAvailable(a);
+        if (degree[b] >= targetDegree)
+            removeAvailable(b);
+    }
+    return adj.map((s) => [...s]);
+};
+class SimDirectStream extends DirectStream {
+    constructor(c, opts) {
+        super(c, ["sim/stream/0.0.0"], {
+            canRelayMessage: true,
+            connectionManager: {
+                // Keep it simple by default; can be expanded later.
+                dialer: opts.dialer ? { retryDelay: 1_000 } : false,
+                pruner: opts.pruner
+                    ? {
+                        interval: opts.prunerIntervalMs,
+                        maxBuffer: opts.prunerMaxBufferBytes,
+                    }
+                    : false,
+                maxConnections: Number.MAX_SAFE_INTEGER,
+                minConnections: 0,
+            },
+        });
+        // Fast/mock signing: we only need the signer identity to flow through the
+        // signatures list for routing semantics; crypto verification is skipped.
+        this.sign = async () => new SignatureWithKey({
+            signature: new Uint8Array([0]),
+            publicKey: this.publicKey,
+            prehash: PreHash.NONE,
+        });
+    }
+    async verifyAndProcess(message) {
+        // Skip expensive crypto verify for large sims, but keep session handling
+        // behavior consistent with the real implementation.
+        const from = message.header.signatures.publicKeys[0];
+        if (this.peers.has(from.hashcode())) {
+            // do nothing
+        }
+        else {
+            this.updateSession(from, Number(message.header.session));
+        }
+        return true;
+    }
+}
+const parseArgs = (argv) => {
+    const get = (key) => {
+        const idx = argv.indexOf(key);
+        if (idx === -1)
+            return undefined;
+        return argv[idx + 1];
+    };
+    if (argv.includes("--help") || argv.includes("-h")) {
+        console.log([
+            "directstream-sim.ts",
+            "",
+            "Args:",
+            "  --nodes N            number of nodes (default: 200)",
+            "  --degree K           target undirected degree (default: 4)",
+            "  --messages M         number of seek waves (default: 20)",
+            "  --targets T          targets per message (default: 5)",
+            "  --redundancy R       seek redundancy (default: 2)",
+            "  --seed S             RNG seed (default: 1)",
+            "  --dialer 0|1         enable autodial (default: 1)",
+            "  --pruner 0|1         enable pruning (default: 0)",
+            "  --prunerIntervalMs X pruner interval (default: 50)",
+            "  --prunerMaxBufferBytes B prune when queued bytes > B (default: 65536)",
+            "  --dialDelayMs X      artificial dial delay (default: 0)",
+            "  --streamRxDelayMs X  per-chunk inbound delay in shim (default: 0)",
+            "  --streamHighWaterMarkBytes B backpressure threshold (default: 262144)",
+            "",
+            "Example:",
+            "  node --loader ts-node/esm ./packages/transport/stream/benchmark/directstream-sim.ts --nodes 500 --degree 6 --messages 50 --targets 20 --redundancy 2 --seed 42",
+        ].join("\n"));
+        process.exit(0);
+    }
+    return {
+        nodes: Number(get("--nodes") ?? 200),
+        degree: Number(get("--degree") ?? 4),
+        messages: Number(get("--messages") ?? 20),
+        targetsPerMessage: Number(get("--targets") ?? 5),
+        redundancy: Number(get("--redundancy") ?? 2),
+        seed: Number(get("--seed") ?? 1),
+        dialer: String(get("--dialer") ?? "1") !== "0",
+        pruner: String(get("--pruner") ?? "0") === "1",
+        prunerIntervalMs: Number(get("--prunerIntervalMs") ?? 50),
+        prunerMaxBufferBytes: Number(get("--prunerMaxBufferBytes") ?? 64 * 1024),
+        dialDelayMs: Number(get("--dialDelayMs") ?? 0),
+        streamRxDelayMs: Number(get("--streamRxDelayMs") ?? 0),
+        streamHighWaterMarkBytes: Number(get("--streamHighWaterMarkBytes") ?? 256 * 1024),
+    };
+};
+const waitForProtocolStreams = async (peers, timeoutMs = 30_000) => {
+    const start = Date.now();
+    while (Date.now() - start < timeoutMs) {
+        let missing = 0;
+        for (const p of peers) {
+            const protocols = p.stream.multicodecs;
+            for (const conn of p.stream.components.connectionManager.getConnections()) {
+                const streams = conn.streams;
+                const hasOutbound = streams.some((s) => s.protocol && protocols.includes(s.protocol) && s.direction === "outbound");
+                const hasInbound = streams.some((s) => s.protocol && protocols.includes(s.protocol) && s.direction === "inbound");
+                if (!hasOutbound || !hasInbound)
+                    missing++;
+            }
+        }
+        if (missing === 0)
+            return;
+        await delay(0);
+    }
+    throw new Error("Timeout waiting for protocol streams to become duplex");
+};
+const main = async () => {
+    const params = parseArgs(process.argv.slice(2));
+    const rng = mulberry32(params.seed);
+    const graph = buildRandomGraph(params.nodes, params.degree, rng);
+    const network = new InMemoryNetwork({
+        streamRxDelayMs: params.streamRxDelayMs,
+        streamHighWaterMarkBytes: params.streamHighWaterMarkBytes,
+        dialDelayMs: params.dialDelayMs,
+    });
+    const peers = [];
+    const basePort = 30_000;
+    for (let i = 0; i < params.nodes; i++) {
+        const port = basePort + i;
+        const { runtime } = InMemoryNetwork.createPeer({ index: i, port, network });
+        runtime.connectionManager = new InMemoryConnectionManager(network, runtime);
+        network.registerPeer(runtime, port);
+        const components = {
+            peerId: runtime.peerId,
+            privateKey: runtime.privateKey,
+            addressManager: runtime.addressManager,
+            registrar: runtime.registrar,
+            connectionManager: runtime.connectionManager,
+            peerStore: runtime.peerStore,
+            events: runtime.events,
+        };
+        peers.push({
+            peerId: runtime.peerId,
+            stream: new SimDirectStream(components, {
+                dialer: params.dialer,
+                pruner: params.pruner,
+                prunerIntervalMs: params.prunerIntervalMs,
+                prunerMaxBufferBytes: params.prunerMaxBufferBytes,
+            }),
+        });
+    }
+    await Promise.all(peers.map((p) => p.stream.start()));
+    // Establish initial graph via dials.
+    for (let a = 0; a < graph.length; a++) {
+        for (const b of graph[a]) {
+            if (b <= a)
+                continue;
+            const addrB = peers[b].stream.components.addressManager.getAddresses()[0];
+            await peers[a].stream.components.connectionManager.openConnection(addrB);
+        }
+    }
+    await waitForProtocolStreams(peers);
+    let delivered = 0;
+    for (let i = 0; i < params.messages; i++) {
+        const source = int(rng, params.nodes);
+        const targets = pickDistinct(rng, params.nodes, Math.min(params.targetsPerMessage, params.nodes - 1), source);
+        const to = targets.map((t) => peers[t].stream.publicKey);
+        await peers[source].stream.publish(new Uint8Array([1]), {
+            mode: new AcknowledgeDelivery({
+                to,
+                redundancy: params.redundancy,
+            }),
+        });
+        delivered += to.length;
+    }
+    // Allow any dialer follow-ups / pruning timers to run briefly.
+    await delay(50);
+    const m = network.metrics;
+    let peerEdges = 0;
+    let neighbourSum = 0;
+    let routeSum = 0;
+    for (const p of peers) {
+        peerEdges += p.stream.components.connectionManager.getConnections().length;
+        neighbourSum += p.stream.peers.size;
+        routeSum += p.stream.routes.count();
+    }
+    const connectionsNow = peerEdges / 2;
+    const avgNeighbours = neighbourSum / peers.length;
+    const avgRoutes = routeSum / peers.length;
+    const lines = [];
+    lines.push("stream directstream-sim results");
+    lines.push(`- nodes: ${params.nodes}, degree: ${params.degree}`);
+    lines.push(`- messages: ${params.messages}, targets/message: ${params.targetsPerMessage}, redundancy: ${params.redundancy}`);
+    lines.push(`- dialer: ${params.dialer ? "on" : "off"}, pruner: ${params.pruner ? "on" : "off"} (interval=${params.prunerIntervalMs}ms, maxBuffer=${params.prunerMaxBufferBytes}B)`);
+    lines.push(`- transport: rxDelay=${params.streamRxDelayMs}ms, hwm=${params.streamHighWaterMarkBytes}B`);
+    lines.push(`- target deliveries attempted: ${delivered}`);
+    lines.push(`- connections: opened=${m.connectionsOpened}, closed=${m.connectionsClosed}, dials=${m.dials}`);
+    lines.push(`- connections now: ${connectionsNow} (avg neighbours/node=${avgNeighbours.toFixed(2)}, avg routes/node=${avgRoutes.toFixed(2)})`);
+    lines.push(`- protocol streams opened: ${m.streamsOpened}`);
+    lines.push(`- frames sent: total=${m.framesSent} (data=${m.dataFramesSent}, ack=${m.ackFramesSent}, goodbye=${m.goodbyeFramesSent}, other=${m.otherFramesSent})`);
+    lines.push(`- bytes sent: ${m.bytesSent}`);
+    console.log(lines.join("\n"));
+    await Promise.all(peers.map((p) => p.stream.stop()));
+};
+await main();
+//# sourceMappingURL=directstream-sim.js.map

dist/benchmark/directstream-sim.js.map

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dist/benchmark/index.d.ts

+/**
+ * Benchmark entrypoint (wired to `pnpm -C packages/transport/stream run bench`).
+ *
+ * Examples:
+ *   pnpm -C packages/transport/stream run bench -- directstream-sim --nodes 500 --degree 6
+ *   pnpm -C packages/transport/stream run bench -- topology-sim --nodes 2000 --degree 4
+ *   pnpm -C packages/transport/stream run bench -- transfer
+ */
+export {};
+//# sourceMappingURL=index.d.ts.map

dist/benchmark/index.d.ts.map

+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../../benchmark/index.ts"],"names":[],"mappings":"AAAA;;;;;;;GAOG"}

dist/benchmark/index.js

+/**
+ * Benchmark entrypoint (wired to `pnpm -C packages/transport/stream run bench`).
+ *
+ * Examples:
+ *   pnpm -C packages/transport/stream run bench -- directstream-sim --nodes 500 --degree 6
+ *   pnpm -C packages/transport/stream run bench -- topology-sim --nodes 2000 --degree 4
+ *   pnpm -C packages/transport/stream run bench -- transfer
+ */
+const argv = process.argv.slice(2);
+const bench = argv[0] === "--" ? argv[1] : argv[0];
+const usage = () => {
+    console.log([
+        "@peerbit/stream benchmarks",
+        "",
+        "Usage:",
+        "  pnpm -C packages/transport/stream run bench -- <benchmark> [args]",
+        "",
+        "Benchmarks:",
+        "  directstream-sim  in-memory DirectStream network sim",
+        "  topology-sim      discrete-event topology/routing sim",
+        "  transfer          small real-libp2p throughput microbench",
+        "",
+        "Examples:",
+        "  pnpm -C packages/transport/stream run bench -- directstream-sim --nodes 500 --degree 6",
+        "  pnpm -C packages/transport/stream run bench -- topology-sim --nodes 2000 --degree 4",
+        "  pnpm -C packages/transport/stream run bench -- transfer",
+    ].join("\n"));
+};
+if (!bench || bench === "--help" || bench === "-h") {
+    usage();
+    process.exit(1);
+}
+switch (bench) {
+    case "directstream-sim":
+        await import("./directstream-sim.js");
+        break;
+    case "topology-sim":
+        await import("./topology-sim.js");
+        break;
+    case "transfer":
+        await import("./transfer.js");
+        break;
+    default:
+        usage();
+        process.exit(1);
+}
+export {};
+//# sourceMappingURL=index.js.map

dist/benchmark/index.js.map

+{"version":3,"file":"index.js","sourceRoot":"","sources":["../../benchmark/index.ts"],"names":[],"mappings":"AAAA;;;;;;;GAOG;AAEH,MAAM,IAAI,GAAG,OAAO,CAAC,IAAI,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;AACnC,MAAM,KAAK,GAAG,IAAI,CAAC,CAAC,CAAC,KAAK,IAAI,CAAC,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC;AAEnD,MAAM,KAAK,GAAG,GAAG,EAAE;IAClB,OAAO,CAAC,GAAG,CACV;QACC,4BAA4B;QAC5B,EAAE;QACF,QAAQ;QACR,qEAAqE;QACrE,EAAE;QACF,aAAa;QACb,wDAAwD;QACxD,yDAAyD;QACzD,6DAA6D;QAC7D,EAAE;QACF,WAAW;QACX,0FAA0F;QAC1F,uFAAuF;QACvF,2DAA2D;KAC3D,CAAC,IAAI,CAAC,IAAI,CAAC,CACZ,CAAC;AACH,CAAC,CAAC;AAEF,IAAI,CAAC,KAAK,IAAI,KAAK,KAAK,QAAQ,IAAI,KAAK,KAAK,IAAI,EAAE,CAAC;IACpD,KAAK,EAAE,CAAC;IACR,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC;AACjB,CAAC;AAED,QAAQ,KAAK,EAAE,CAAC;IACf,KAAK,kBAAkB;QACtB,MAAM,MAAM,CAAC,uBAAuB,CAAC,CAAC;QACtC,MAAM;IACP,KAAK,cAAc;QAClB,MAAM,MAAM,CAAC,mBAAmB,CAAC,CAAC;QAClC,MAAM;IACP,KAAK,UAAU;QACd,MAAM,MAAM,CAAC,eAAe,CAAC,CAAC;QAC9B,MAAM;IACP;QACC,KAAK,EAAE,CAAC;QACR,OAAO,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC;AAClB,CAAC"}

dist/benchmark/topology-sim.d.ts

+/**
+ * Lightweight discrete-event simulator for @peerbit/stream-style routing.
+ *
+ * This is intentionally NOT libp2p-backed. It is meant for 1k–10k+ node
+ * experiments (topology / convergence / message overhead) that would be
+ * infeasible with real libp2p peers.
+ *
+ * Run:
+ *   node --loader ts-node/esm ./packages/transport/stream/benchmark/topology-sim.ts --nodes 2000 --degree 4 --messages 200 --targets 10 --redundancy 2 --seed 1
+ */
+export {};
+//# sourceMappingURL=topology-sim.d.ts.map

dist/benchmark/topology-sim.d.ts.map

+{"version":3,"file":"topology-sim.d.ts","sourceRoot":"","sources":["../../benchmark/topology-sim.ts"],"names":[],"mappings":"AAAA;;;;;;;;;GASG"}

dist/benchmark/topology-sim.js

+/**
+ * Lightweight discrete-event simulator for @peerbit/stream-style routing.
+ *
+ * This is intentionally NOT libp2p-backed. It is meant for 1k–10k+ node
+ * experiments (topology / convergence / message overhead) that would be
+ * infeasible with real libp2p peers.
+ *
+ * Run:
+ *   node --loader ts-node/esm ./packages/transport/stream/benchmark/topology-sim.ts --nodes 2000 --degree 4 --messages 200 --targets 10 --redundancy 2 --seed 1
+ */
+import { computeSeekAckRouteUpdate, selectSeekRelayTargets, shouldAcknowledgeDataMessage, shouldIgnoreDataMessage, } from "../src/core/seek-routing.js";
+class MinHeap {
+    compare;
+    heap = [];
+    constructor(compare) {
+        this.compare = compare;
+    }
+    get size() {
+        return this.heap.length;
+    }
+    push(item) {
+        this.heap.push(item);
+        this.bubbleUp(this.heap.length - 1);
+    }
+    pop() {
+        if (this.heap.length === 0)
+            return undefined;
+        const root = this.heap[0];
+        const last = this.heap.pop();
+        if (this.heap.length > 0) {
+            this.heap[0] = last;
+            this.bubbleDown(0);
+        }
+        return root;
+    }
+    bubbleUp(index) {
+        while (index > 0) {
+            const parentIndex = (index - 1) >> 1;
+            if (this.compare(this.heap[index], this.heap[parentIndex]) >= 0)
+                break;
+            [this.heap[index], this.heap[parentIndex]] = [
+                this.heap[parentIndex],
+                this.heap[index],
+            ];
+            index = parentIndex;
+        }
+    }
+    bubbleDown(index) {
+        const length = this.heap.length;
+        for (;;) {
+            const left = index * 2 + 1;
+            const right = left + 1;
+            let smallest = index;
+            if (left < length &&
+                this.compare(this.heap[left], this.heap[smallest]) < 0) {
+                smallest = left;
+            }
+            if (right < length &&
+                this.compare(this.heap[right], this.heap[smallest]) < 0) {
+                smallest = right;
+            }
+            if (smallest === index)
+                break;
+            [this.heap[index], this.heap[smallest]] = [
+                this.heap[smallest],
+                this.heap[index],
+            ];
+            index = smallest;
+        }
+    }
+}
+const mulberry32 = (seed) => {
+    let t = seed >>> 0;
+    return () => {
+        t += 0x6d2b79f5;
+        let x = t;
+        x = Math.imul(x ^ (x >>> 15), x | 1);
+        x ^= x + Math.imul(x ^ (x >>> 7), x | 61);
+        return ((x ^ (x >>> 14)) >>> 0) / 4294967296;
+    };
+};
+const int = (rng, maxExclusive) => Math.floor(rng() * maxExclusive);
+const intBetween = (rng, minInclusive, maxInclusive) => minInclusive + int(rng, maxInclusive - minInclusive + 1);
+const pickDistinct = (rng, n, k, exclude) => {
+    const out = new Set();
+    while (out.size < k) {
+        const candidate = int(rng, n);
+        if (candidate === exclude)
+            continue;
+        out.add(candidate);
+    }
+    return [...out];
+};
+const buildRandomGraph = (n, targetDegree, rng) => {
+    if (n <= 0)
+        throw new Error("nodes must be > 0");
+    if (targetDegree < 0)
+        throw new Error("degree must be >= 0");
+    if (targetDegree >= n) {
+        throw new Error("degree must be < nodes for a simple graph");
+    }
+    const adj = Array.from({ length: n }, () => new Set());
+    const degree = new Uint16Array(n);
+    const connect = (a, b) => {
+        if (a === b)
+            return false;
+        if (adj[a].has(b))
+            return false;
+        if (degree[a] >= targetDegree || degree[b] >= targetDegree)
+            return false;
+        adj[a].add(b);
+        adj[b].add(a);
+        degree[a] += 1;
+        degree[b] += 1;
+        return true;
+    };
+    // Seed connectivity so we don't start disconnected.
+    if (targetDegree >= 2 && n >= 3) {
+        for (let i = 0; i < n; i++)
+            connect(i, (i + 1) % n);
+    }
+    else if (targetDegree >= 1 && n >= 2) {
+        for (let i = 0; i < n - 1; i++)
+            connect(i, i + 1);
+    }
+    const available = [];
+    const pos = new Int32Array(n).fill(-1);
+    for (let i = 0; i < n; i++) {
+        if (degree[i] < targetDegree) {
+            pos[i] = available.length;
+            available.push(i);
+        }
+    }
+    const removeAvailable = (id) => {
+        const p = pos[id];
+        if (p < 0)
+            return;
+        const last = available.pop();
+        if (last !== id) {
+            available[p] = last;
+            pos[last] = p;
+        }
+        pos[id] = -1;
+    };
+    const maxAttempts = n * Math.max(1, targetDegree) * 200;
+    let attempts = 0;
+    while (available.length > 1 && attempts < maxAttempts) {
+        attempts++;
+        const a = available[int(rng, available.length)];
+        const b = available[int(rng, available.length)];
+        if (a === b)
+            continue;
+        if (!connect(a, b))
+            continue;
+        if (degree[a] >= targetDegree)
+            removeAvailable(a);
+        if (degree[b] >= targetDegree)
+            removeAvailable(b);
+    }
+    return adj.map((s) => [...s]);
+};
+const addRoute = (routesByFrom, from, target, via, distance, maxPerTarget = 8) => {
+    let byTarget = routesByFrom.get(from);
+    if (!byTarget) {
+        byTarget = new Map();
+        routesByFrom.set(from, byTarget);
+    }
+    let list = byTarget.get(target);
+    if (!list) {
+        list = [];
+        byTarget.set(target, list);
+    }
+    const existing = list.find((x) => x.via === via);
+    if (existing) {
+        existing.distance = Math.min(existing.distance, distance);
+    }
+    else {
+        list.push({ via, distance });
+    }
+    list.sort((a, b) => a.distance - b.distance);
+    if (list.length > maxPerTarget) {
+        list.length = maxPerTarget;
+    }
+};
+const traceHas = (trace, node) => {
+    let current = trace;
+    while (current) {
+        if (current.node === node)
+            return true;
+        current = current.prev;
+    }
+    return false;
+};
+const simulate = (params) => {
+    const rng = mulberry32(params.seed);
+    const graph = buildRandomGraph(params.nodes, params.degree, rng);
+    const warn = graph.some((nbs) => nbs.length < Math.min(params.degree, params.nodes - 1)) &&
+        "graph generation hit degree constraints (some nodes < --degree)";
+    const routes = Array.from({ length: params.nodes }, () => new Map());
+    // Seed direct neighbor routes: from=self -> target=neighbor via neighbor at distance=-1.
+    for (let u = 0; u < params.nodes; u++) {
+        for (const v of graph[u]) {
+            addRoute(routes[u], u, v, v, -1);
+        }
+    }
+    let dataTx = 0;
+    let ackTx = 0;
+    let targetDeliveries = 0;
+    let targetExpected = 0;
+    let firstHopSum = 0;
+    let firstHopCount = 0;
+    const seen = new Uint8Array(params.nodes);
+    const deliveredToTarget = new Uint8Array(params.nodes);
+    const heap = new MinHeap((a, b) => a.t - b.t);
+    const scheduleData = (now, from, to, signer, hop) => {
+        if (params.dropRate > 0 && rng() < params.dropRate)
+            return;
+        const delay = intBetween(rng, params.minDelay, params.maxDelay);
+        dataTx++;
+        heap.push({ t: now + delay, kind: "data", from, to, signer, hop });
+    };
+    const scheduleAck = (now, from, to, trace, target, seenCounter) => {
+        if (params.dropRate > 0 && rng() < params.dropRate)
+            return;
+        const delay = intBetween(rng, params.minDelay, params.maxDelay);
+        ackTx++;
+        heap.push({
+            t: now + delay,
+            kind: "ack",
+            from,
+            to,
+            trace,
+            target,
+            seenCounter,
+        });
+    };
+    for (let msg = 0; msg < params.messages; msg++) {
+        seen.fill(0);
+        deliveredToTarget.fill(0);
+        while (heap.pop() != null) {
+            // drain any leftover events (shouldn't happen since we drain per message)
+        }
+        const source = int(rng, params.nodes);
+        const targets = pickDistinct(rng, params.nodes, Math.min(params.targetsPerMessage, params.nodes - 1), source);
+        const targetsSet = new Set(targets);
+        targetExpected += targets.length;
+        const sourceSigner = { node: source };
+        const t0 = 0;
+        for (const nb of graph[source]) {
+            scheduleData(t0, source, nb, sourceSigner, 1);
+        }
+        while (heap.size > 0) {
+            const ev = heap.pop();
+            if (ev.kind === "data") {
+                const to = ev.to;
+                const seenBefore = seen[to];
+                const ignored = shouldIgnoreDataMessage({
+                    signedBySelf: traceHas(ev.signer, to),
+                    seenBefore,
+                    mode: { kind: "seek", redundancy: params.redundancy },
+                });
+                if (ignored) {
+                    continue;
+                }
+                seen[to] = Math.min(255, seenBefore + 1);
+                if (shouldAcknowledgeDataMessage({
+                    isRecipient: targetsSet.has(to),
+                    seenBefore,
+                    redundancy: params.redundancy,
+                })) {
+                    if (deliveredToTarget[to] === 0) {
+                        deliveredToTarget[to] = 1;
+                        targetDeliveries++;
+                        firstHopSum += ev.hop;
+                        firstHopCount++;
+                    }
+                    // ACK travels backwards along the signer trace.
+                    scheduleAck(ev.t, to, ev.signer.node, ev.signer, to, seenBefore);
+                }
+                // Redundant forwarding: forward until local seenBefore reaches redundancy.
+                const newSigner = { node: to, prev: ev.signer };
+                const relayTo = selectSeekRelayTargets({
+                    candidates: graph[to],
+                    getCandidateId: (id) => id,
+                    inboundId: ev.from,
+                    hasSigned: (id) => traceHas(ev.signer, id),
+                });
+                for (const nb of relayTo) {
+                    scheduleData(ev.t, to, nb, newSigner, ev.hop + 1);
+                }
+            }
+            else {
+                // ACK processing at `ev.to` (a signer on the trace).
+                const current = ev.to;
+                if (ev.trace.node !== current) {
+                    // Should not happen; indicates a bug in the simulator.
+                    continue;
+                }
+                const upstream = ev.trace.prev?.node;
+                const routeUpdate = computeSeekAckRouteUpdate({
+                    current,
+                    upstream,
+                    downstream: ev.from,
+                    target: ev.target,
+                    distance: ev.seenCounter,
+                });
+                addRoute(routes[current], routeUpdate.from, routeUpdate.target, routeUpdate.neighbour, routeUpdate.distance);
+                if (upstream != null) {
+                    scheduleAck(ev.t, current, upstream, ev.trace.prev, ev.target, ev.seenCounter);
+                }
+            }
+        }
+    }
+    let totalRouteEntries = 0;
+    let totalRouteTargets = 0;
+    for (let i = 0; i < params.nodes; i++) {
+        for (const [_from, byTarget] of routes[i]) {
+            totalRouteTargets += byTarget.size;
+            for (const [_target, list] of byTarget) {
+                totalRouteEntries += list.length;
+            }
+        }
+    }
+    return {
+        dataTx,
+        ackTx,
+        targetDeliveries,
+        targetExpected,
+        firstHopSum,
+        firstHopCount,
+        avgRouteEntriesPerNode: totalRouteEntries / params.nodes,
+        avgRouteTargetsPerNode: totalRouteTargets / params.nodes,
+        warn: warn || undefined,
+    };
+};
+const parseArgs = (argv) => {
+    const get = (key) => {
+        const idx = argv.indexOf(key);
+        if (idx === -1)
+            return undefined;
+        return argv[idx + 1];
+    };
+    const has = (key) => argv.includes(key);
+    if (has("--help") || has("-h")) {
+        console.log([
+            "topology-sim.ts",
+            "",
+            "Args:",
+            "  --nodes N            number of nodes (default: 2000)",
+            "  --degree K           target undirected degree (default: 4)",
+            "  --messages M         number of seek waves (default: 200)",
+            "  --targets T          targets per message (default: 10)",
+            "  --redundancy R       seek redundancy (default: 2)",
+            "  --seed S             RNG seed (default: 1)",
+            "  --drop P             per-edge drop rate [0..1] (default: 0)",
+            "  --minDelay MS        min per-edge delay (default: 1)",
+            "  --maxDelay MS        max per-edge delay (default: 5)",
+            "",
+            "Example:",
+            "  node --loader ts-node/esm ./packages/transport/stream/benchmark/topology-sim.ts --nodes 5000 --degree 6 --messages 500 --targets 20 --redundancy 2 --drop 0.01 --seed 42",
+        ].join("\n"));
+        process.exit(0);
+    }
+    const nodes = Number(get("--nodes") ?? 2000);
+    const degree = Number(get("--degree") ?? 4);
+    const messages = Number(get("--messages") ?? 200);
+    const targetsPerMessage = Number(get("--targets") ?? 10);
+    const redundancy = Number(get("--redundancy") ?? 2);
+    const seed = Number(get("--seed") ?? 1);
+    const dropRate = Number(get("--drop") ?? 0);
+    const minDelay = Number(get("--minDelay") ?? 1);
+    const maxDelay = Number(get("--maxDelay") ?? 5);
+    return {
+        nodes,
+        degree,
+        messages,
+        targetsPerMessage,
+        redundancy,
+        seed,
+        dropRate,
+        minDelay,
+        maxDelay,
+    };
+};
+const main = async () => {
+    const params = parseArgs(process.argv.slice(2));
+    const started = Date.now();
+    const result = simulate(params);
+    const elapsedMs = Date.now() - started;
+    const deliveryPct = result.targetExpected === 0
+        ? 100
+        : (result.targetDeliveries / result.targetExpected) * 100;
+    const avgFirstHop = result.firstHopCount === 0 ? 0 : result.firstHopSum / result.firstHopCount;
+    const lines = [];
+    lines.push("stream topology-sim results");
+    lines.push(`- nodes: ${params.nodes}, degree: ${params.degree}`);
+    lines.push(`- messages: ${params.messages}, targets/message: ${params.targetsPerMessage}, redundancy: ${params.redundancy}`);
+    lines.push(`- drop: ${params.dropRate}, delay: ${params.minDelay}..${params.maxDelay} (sim units)`);
+    lines.push(`- tx: data=${result.dataTx}, ack=${result.ackTx}`);
+    lines.push(`- delivery: ${result.targetDeliveries}/${result.targetExpected} (${deliveryPct.toFixed(2)}%)`);
+    lines.push(`- avg first-delivery hop: ${avgFirstHop.toFixed(2)}`);
+    lines.push(`- avg route targets/node: ${result.avgRouteTargetsPerNode.toFixed(2)}, entries/node: ${result.avgRouteEntriesPerNode.toFixed(2)}`);
+    if (result.warn) {
+        lines.push(`- warn: ${result.warn}`);
+    }
+    lines.push(`- wall time: ${elapsedMs}ms`);
+    console.log(lines.join("\n"));
+};
+await main();
+//# sourceMappingURL=topology-sim.js.map

dist/benchmark/topology-sim.js.map

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dist/src/core/seek-routing.d.ts

+export type SeekRoutingMode = {
+    kind: "seek";
+    redundancy: number;
+} | {
+    kind: "non-seek";
+};
+export type ShouldIgnoreDataMessageArgs = {
+    signedBySelf: boolean;
+    seenBefore: number;
+    mode: SeekRoutingMode;
+};
+export declare const shouldIgnoreDataMessage: (args: ShouldIgnoreDataMessageArgs) => boolean;
+export type SelectSeekRelayTargetsArgs<T, Id extends string | number> = {
+    candidates: Iterable<T>;
+    getCandidateId: (candidate: T) => Id;
+    inboundId: Id;
+    hasSigned: (candidateId: Id) => boolean;
+};
+export declare const selectSeekRelayTargets: <T, Id extends string | number>(args: SelectSeekRelayTargetsArgs<T, Id>) => T[];
+export type ShouldAcknowledgeDataMessageArgs = {
+    isRecipient: boolean;
+    seenBefore: number;
+    redundancy: number;
+};
+export declare const shouldAcknowledgeDataMessage: (args: ShouldAcknowledgeDataMessageArgs) => boolean;
+export type SeekAckRouteUpdate<Id extends string | number> = {
+    from: Id;
+    neighbour: Id;
+    target: Id;
+    distance: number;
+};
+export declare const computeSeekAckRouteUpdate: <Id extends string | number>(args: {
+    current: Id;
+    upstream?: Id;
+    downstream: Id;
+    target: Id;
+    distance: number;
+}) => SeekAckRouteUpdate<Id>;
+//# sourceMappingURL=seek-routing.d.ts.map

dist/src/core/seek-routing.d.ts.map

+{"version":3,"file":"seek-routing.d.ts","sourceRoot":"","sources":["../../../src/core/seek-routing.ts"],"names":[],"mappings":"AAAA,MAAM,MAAM,eAAe,GACxB;IAAE,IAAI,EAAE,MAAM,CAAC;IAAC,UAAU,EAAE,MAAM,CAAA;CAAE,GACpC;IAAE,IAAI,EAAE,UAAU,CAAA;CAAE,CAAC;AAExB,MAAM,MAAM,2BAA2B,GAAG;IACzC,YAAY,EAAE,OAAO,CAAC;IACtB,UAAU,EAAE,MAAM,CAAC;IACnB,IAAI,EAAE,eAAe,CAAC;CACtB,CAAC;AAEF,eAAO,MAAM,uBAAuB,GAAI,MAAM,2BAA2B,YAUxE,CAAC;AAEF,MAAM,MAAM,0BAA0B,CAAC,CAAC,EAAE,EAAE,SAAS,MAAM,GAAG,MAAM,IAAI;IACvE,UAAU,EAAE,QAAQ,CAAC,CAAC,CAAC,CAAC;IACxB,cAAc,EAAE,CAAC,SAAS,EAAE,CAAC,KAAK,EAAE,CAAC;IACrC,SAAS,EAAE,EAAE,CAAC;IACd,SAAS,EAAE,CAAC,WAAW,EAAE,EAAE,KAAK,OAAO,CAAC;CACxC,CAAC;AAEF,eAAO,MAAM,sBAAsB,GAAI,CAAC,EAAE,EAAE,SAAS,MAAM,GAAG,MAAM,EACnE,MAAM,0BAA0B,CAAC,CAAC,EAAE,EAAE,CAAC,KACrC,CAAC,EASH,CAAC;AAEF,MAAM,MAAM,gCAAgC,GAAG;IAC9C,WAAW,EAAE,OAAO,CAAC;IACrB,UAAU,EAAE,MAAM,CAAC;IACnB,UAAU,EAAE,MAAM,CAAC;CACnB,CAAC;AAEF,eAAO,MAAM,4BAA4B,GACxC,MAAM,gCAAgC,YAGtC,CAAC;AAEF,MAAM,MAAM,kBAAkB,CAAC,EAAE,SAAS,MAAM,GAAG,MAAM,IAAI;IAC5D,IAAI,EAAE,EAAE,CAAC;IACT,SAAS,EAAE,EAAE,CAAC;IACd,MAAM,EAAE,EAAE,CAAC;IACX,QAAQ,EAAE,MAAM,CAAC;CACjB,CAAC;AAEF,eAAO,MAAM,yBAAyB,GAAI,EAAE,SAAS,MAAM,GAAG,MAAM,EAAE,MAAM;IAC3E,OAAO,EAAE,EAAE,CAAC;IACZ,QAAQ,CAAC,EAAE,EAAE,CAAC;IACd,UAAU,EAAE,EAAE,CAAC;IACf,MAAM,EAAE,EAAE,CAAC;IACX,QAAQ,EAAE,MAAM,CAAC;CACjB,KAAG,kBAAkB,CAAC,EAAE,CAOxB,CAAC"}

dist/src/core/seek-routing.js

+export const shouldIgnoreDataMessage = (args) => {
+    if (args.signedBySelf) {
+        return true;
+    }
+    if (args.mode.kind === "seek") {
+        return args.seenBefore >= args.mode.redundancy;
+    }
+    return args.seenBefore > 0;
+};
+export const selectSeekRelayTargets = (args) => {
+    const out = [];
+    for (const candidate of args.candidates) {
+        const candidateId = args.getCandidateId(candidate);
+        if (candidateId === args.inboundId)
+            continue;
+        if (args.hasSigned(candidateId))
+            continue;
+        out.push(candidate);
+    }
+    return out;
+};
+export const shouldAcknowledgeDataMessage = (args) => {
+    return args.isRecipient && args.seenBefore < args.redundancy;
+};
+export const computeSeekAckRouteUpdate = (args) => {
+    return {
+        from: args.upstream ?? args.current,
+        neighbour: args.downstream,
+        target: args.target,
+        distance: args.distance,
+    };
+};
+//# sourceMappingURL=seek-routing.js.map

dist/src/core/seek-routing.js.map

+{"version":3,"file":"seek-routing.js","sourceRoot":"","sources":["../../../src/core/seek-routing.ts"],"names":[],"mappings":"AAUA,MAAM,CAAC,MAAM,uBAAuB,GAAG,CAAC,IAAiC,EAAE,EAAE;IAC5E,IAAI,IAAI,CAAC,YAAY,EAAE,CAAC;QACvB,OAAO,IAAI,CAAC;IACb,CAAC;IAED,IAAI,IAAI,CAAC,IAAI,CAAC,IAAI,KAAK,MAAM,EAAE,CAAC;QAC/B,OAAO,IAAI,CAAC,UAAU,IAAI,IAAI,CAAC,IAAI,CAAC,UAAU,CAAC;IAChD,CAAC;IAED,OAAO,IAAI,CAAC,UAAU,GAAG,CAAC,CAAC;AAC5B,CAAC,CAAC;AASF,MAAM,CAAC,MAAM,sBAAsB,GAAG,CACrC,IAAuC,EACjC,EAAE;IACR,MAAM,GAAG,GAAQ,EAAE,CAAC;IACpB,KAAK,MAAM,SAAS,IAAI,IAAI,CAAC,UAAU,EAAE,CAAC;QACzC,MAAM,WAAW,GAAG,IAAI,CAAC,cAAc,CAAC,SAAS,CAAC,CAAC;QACnD,IAAI,WAAW,KAAK,IAAI,CAAC,SAAS;YAAE,SAAS;QAC7C,IAAI,IAAI,CAAC,SAAS,CAAC,WAAW,CAAC;YAAE,SAAS;QAC1C,GAAG,CAAC,IAAI,CAAC,SAAS,CAAC,CAAC;IACrB,CAAC;IACD,OAAO,GAAG,CAAC;AACZ,CAAC,CAAC;AAQF,MAAM,CAAC,MAAM,4BAA4B,GAAG,CAC3C,IAAsC,EACrC,EAAE;IACH,OAAO,IAAI,CAAC,WAAW,IAAI,IAAI,CAAC,UAAU,GAAG,IAAI,CAAC,UAAU,CAAC;AAC9D,CAAC,CAAC;AASF,MAAM,CAAC,MAAM,yBAAyB,GAAG,CAA6B,IAMrE,EAA0B,EAAE;IAC5B,OAAO;QACN,IAAI,EAAE,IAAI,CAAC,QAAQ,IAAI,IAAI,CAAC,OAAO;QACnC,SAAS,EAAE,IAAI,CAAC,UAAU;QAC1B,MAAM,EAAE,IAAI,CAAC,MAAM;QACnB,QAAQ,EAAE,IAAI,CAAC,QAAQ;KACvB,CAAC;AACH,CAAC,CAAC"}

src/core/seek-routing.ts

+export type SeekRoutingMode =
+	| { kind: "seek"; redundancy: number }
+	| { kind: "non-seek" };
+
+export type ShouldIgnoreDataMessageArgs = {
+	signedBySelf: boolean;
+	seenBefore: number;
+	mode: SeekRoutingMode;
+};
+
+export const shouldIgnoreDataMessage = (args: ShouldIgnoreDataMessageArgs) => {
+	if (args.signedBySelf) {
+		return true;
+	}
+
+	if (args.mode.kind === "seek") {
+		return args.seenBefore >= args.mode.redundancy;
+	}
+
+	return args.seenBefore > 0;
+};
+
+export type SelectSeekRelayTargetsArgs<T, Id extends string | number> = {
+	candidates: Iterable<T>;
+	getCandidateId: (candidate: T) => Id;
+	inboundId: Id;
+	hasSigned: (candidateId: Id) => boolean;
+};
+
+export const selectSeekRelayTargets = <T, Id extends string | number>(
+	args: SelectSeekRelayTargetsArgs<T, Id>,
+): T[] => {
+	const out: T[] = [];
+	for (const candidate of args.candidates) {
+		const candidateId = args.getCandidateId(candidate);
+		if (candidateId === args.inboundId) continue;
+		if (args.hasSigned(candidateId)) continue;
+		out.push(candidate);
+	}
+	return out;
+};
+
+export type ShouldAcknowledgeDataMessageArgs = {
+	isRecipient: boolean;
+	seenBefore: number;
+	redundancy: number;
+};
+
+export const shouldAcknowledgeDataMessage = (
+	args: ShouldAcknowledgeDataMessageArgs,
+) => {
+	return args.isRecipient && args.seenBefore < args.redundancy;
+};
+
+export type SeekAckRouteUpdate<Id extends string | number> = {
+	from: Id;
+	neighbour: Id;
+	target: Id;
+	distance: number;
+};
+
+export const computeSeekAckRouteUpdate = <Id extends string | number>(args: {
+	current: Id;
+	upstream?: Id;
+	downstream: Id;
+	target: Id;
+	distance: number;
+}): SeekAckRouteUpdate<Id> => {
+	return {
+		from: args.upstream ?? args.current,
+		neighbour: args.downstream,
+		target: args.target,
+		distance: args.distance,
+	};
+};

dist/benchmark/transfer.js

 import { tcp } from "@libp2p/tcp";
 import { TestSession } from "@peerbit/libp2p-test-utils";
-import { SeekDelivery } from "@peerbit/stream-interface";
+import { AcknowledgeDelivery } from "@peerbit/stream-interface";
 import { waitForResolved } from "@peerbit/time";
@@ -49,3 +49,3 @@ import B from "benchmark";
 stream(0).publish(new Uint8Array([123]), {
-    mode: new SeekDelivery({
+    mode: new AcknowledgeDelivery({
         redundancy: 1,
@@ -52,0 +52,0 @@ to: [stream(session.peers.length - 1).publicKey],

dist/benchmark/transfer.js.map

@@ -1,1 +0,1 @@
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+{"version":3,"file":"transfer.js","sourceRoot":"","sources":["../../benchmark/transfer.ts"],"names":[],"mappings":"AAAA,OAAO,EAAE,GAAG,EAAE,MAAM,aAAa,CAAC;AAClC,OAAO,EAAE,WAAW,EAAE,MAAM,4BAA4B,CAAC;AACzD,OAAO,EAAE,mBAAmB,EAAE,MAAM,2BAA2B,CAAC;AAChE,OAAO,EAAE,eAAe,EAAE,MAAM,eAAe,CAAC;AAChD,OAAO,CAAC,MAAM,WAAW,CAAC;AAC1B,OAAO,MAAM,MAAM,QAAQ,CAAC;AAC5B,OAAO,EACN,YAAY,EAEZ,gBAAgB,GAChB,MAAM,iBAAiB,CAAC;AAEzB,+DAA+D;AAE/D,yDAAyD;AACzD,qDAAqD;AACrD,sDAAsD;AAEtD,MAAM,cAAe,SAAQ,YAAY;IACxC,YAAY,CAAyB;QACpC,KAAK,CAAC,CAAC,EAAE,CAAC,aAAa,CAAC,EAAE;YACzB,eAAe,EAAE,IAAI;YACrB,iBAAiB,EAAE,KAAK;SACxB,CAAC,CAAC;IACJ,CAAC;CACD;AACD,MAAM,OAAO,GAAG,MAAM,WAAW,CAAC,YAAY,CAAC,CAAC,EAAE;IACjD,UAAU,EAAE,CAAC,GAAG,EAAE,CAAC;IACnB,QAAQ,EAAE,EAAE,YAAY,EAAE,CAAC,CAAM,EAAE,EAAE,CAAC,IAAI,cAAc,CAAC,CAAC,CAAC,EAAE;CAC7D,CAAC,CAAC;AAEH;;;;;;;;;;;;;;GAcG;AACH,MAAM,OAAO,CAAC,OAAO,CAAC;IACrB,CAAC,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;IACpC,CAAC,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;IACpC,CAAC,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,EAAE,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC;CACpC,CAAC,CAAC;AAEH,MAAM,MAAM,GAAG,CAAC,CAAS,EAAkB,EAAE,CAC5C,OAAO,CAAC,KAAK,CAAC,CAAC,CAAC,CAAC,QAAQ,CAAC,YAAY,CAAC;AAExC,MAAM,gBAAgB,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,MAAM,CAAC,CAAC,CAAC,CAAC,CAAC;AAC7C,MAAM,gBAAgB,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,MAAM,CAAC,CAAC,CAAC,CAAC,CAAC;AAC7C,MAAM,gBAAgB,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,MAAM,CAAC,CAAC,CAAC,CAAC,CAAC;AAE7C,MAAM,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,IAAI,UAAU,CAAC,CAAC,GAAG,CAAC,CAAC,EAAE;IACxC,IAAI,EAAE,IAAI,mBAAmB,CAAC;QAC7B,UAAU,EAAE,CAAC;QACb,EAAE,EAAE,CAAC,MAAM,CAAC,OAAO,CAAC,KAAK,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,SAAS,CAAC;KAChD,CAAC;CACF,CAAC,CAAC;AACH,MAAM,eAAe,CAAC,GAAG,EAAE,CAC1B,MAAM,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,WAAW,CAC3B,MAAM,CAAC,CAAC,CAAC,CAAC,aAAa,EACvB,MAAM,CAAC,CAAC,CAAC,CAAC,aAAa,CACvB,CACD,CAAC;AAEF,IAAI,KAAK,GAAG,IAAI,CAAC,CAAC,KAAK,EAAE,CAAC;AAE1B,IAAI,QAAQ,GAAoC,SAAS,CAAC;AAC1D,MAAM,MAAM,GAAwC,IAAI,GAAG,EAAE,CAAC;AAC9D,MAAM,OAAO,GAAG,CAAC,GAAe,EAAE,EAAE,CACnC,MAAM,CAAC,UAAU,CAAC,MAAM,CAAC,CAAC,MAAM,CAAC,GAAG,CAAC,QAAQ,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,CAAC,MAAM,CAAC,QAAQ,CAAC,CAAC;AAExE,MAAM,KAAK,GAAG,CAAC,GAAG,EAAE,GAAG,EAAE,GAAG,CAAC,CAAC;AAC9B,KAAK,MAAM,IAAI,IAAI,KAAK,EAAE,CAAC;IAC1B,KAAK,GAAG,KAAK,CAAC,GAAG,CAAC,QAAQ,GAAG,IAAI,GAAG,GAAG,GAAG,IAAI,EAAE;QAC/C,KAAK,EAAE,IAAI;QACX,EAAE,EAAE,CAAC,QAAa,EAAE,EAAE;YACrB,MAAM,KAAK,GAAG,MAAM,CAAC,WAAW,CAAC,IAAI,CAAC,CAAC,CAAC,MAAM;YAC9C,MAAM,CAAC,GAAG,CAAC,OAAO,CAAC,KAAK,CAAC,EAAE,QAAQ,CAAC,CAAC;YACrC,MAAM,CAAC,CAAC,CAAC,CAAC,OAAO,CAAC,KAAK,EAAE;gBACxB,EAAE,EAAE,CAAC,MAAM,CAAC,OAAO,CAAC,KAAK,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,SAAS,CAAC;aAChD,CAAC,CAAC;QACJ,CAAC;QACD,KAAK,EAAE,GAAG,EAAE;YACX,QAAQ,GAAG,CAAC,GAAG,EAAE,EAAE;gBAClB,MAAM,CAAC,GAAG,CAAC,OAAO,CAAC,GAAG,CAAC,MAAM,CAAC,IAAI,CAAC,CAAE,CAAC,OAAO,EAAE,CAAC;YACjD,CAAC,CAAC;YAEF,MAAM,CAAC,OAAO,CAAC,KAAK,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,gBAAgB,CAAC,MAAM,EAAE,QAAQ,CAAC,CAAC;YACpE,MAAM,CAAC,KAAK,EAAE,CAAC;QAChB,CAAC;QACD,QAAQ,EAAE,GAAG,EAAE;YACd,MAAM,CAAC,OAAO,CAAC,KAAK,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,mBAAmB,CAAC,MAAM,EAAE,QAAQ,CAAC,CAAC;QACxE,CAAC;KACD,CAAC,CAAC;AACJ,CAAC;AACD,KAAK;KACH,EAAE,CAAC,OAAO,EAAE,CAAC,KAAU,EAAE,EAAE;IAC3B,OAAO,CAAC,GAAG,CAAC,MAAM,CAAC,KAAK,CAAC,MAAM,CAAC,CAAC,CAAC;AACnC,CAAC,CAAC;KACD,EAAE,CAAC,UAAU,EAAE,UAAqB,GAAG,IAAW;IAClD,OAAO,CAAC,IAAI,EAAE,CAAC;AAChB,CAAC,CAAC;KACD,GAAG,CAAC,EAAE,KAAK,EAAE,IAAI,EAAE,CAAC,CAAC"}

dist/src/index.d.ts

@@ -8,4 +8,4 @@ import { TypedEventEmitter } from "@libp2p/interface";
 import type { SignatureWithKey } from "@peerbit/crypto";
-import { ACK, AcknowledgeDelivery, AnyWhere, DataMessage, Goodbye, Message, MultiAddrinfo, SeekDelivery, SilentDelivery } from "@peerbit/stream-interface";
-import type { IdOptions, PeerRefs, PriorityOptions, PublicKeyFromHashResolver, StreamEvents, WaitForAnyOpts, WaitForPeer, WaitForPresentOpts, WithExtraSigners, WithMode, WithTo } from "@peerbit/stream-interface";
+import { ACK, AcknowledgeAnyWhere, AcknowledgeDelivery, AnyWhere, DataMessage, Goodbye, Message, MultiAddrinfo, SilentDelivery } from "@peerbit/stream-interface";
+import type { DirectStreamAckRouteHint, IdOptions, PeerRefs, PriorityOptions, PublicKeyFromHashResolver, StreamEvents, WaitForAnyOpts, WaitForPeer, WaitForPresentOpts, WithExtraSigners, WithMode, WithTo } from "@peerbit/stream-interface";
 import { pipe } from "it-pipe";
@@ -70,2 +70,4 @@ import { type Pushable } from "it-pushable";
     _getActiveOutboundPushable(): PushableLanes<Uint8Array> | undefined;
+    getOutboundQueuedBytes(): number;
+    getOutboundQueuedBytesByLane(): number[];
     _getOutboundCount(): number;
@@ -158,5 +160,23 @@ _getInboundCount(): number;
     connectionManager?: ConnectionManagerArguments;
-    routeSeekInterval?: number;
     seekTimeout?: number;
     routeMaxRetentionPeriod?: number;
+    /**
+     * Best-effort bounds for the per-process route cache. These exist to prevent
+     * unbounded memory growth in large networks/simulations.
+     */
+    routeCacheMaxFromEntries?: number;
+    routeCacheMaxTargetsPerFrom?: number;
+    routeCacheMaxRelaysPerTarget?: number;
+    /**
+     * Share node-level routing/session state across DirectStream instances created
+     * from the same libp2p private key.
+     *
+     * This reduces duplicated topology knowledge when multiple protocols run on
+     * the same node (e.g. pubsub + fanout overlays).
+     *
+     * Defaults to `true`.
+     */
+    sharedRouting?: boolean;
+    seenCacheMax?: number;
+    seenCacheTtlMs?: number;
 };
@@ -212,2 +232,4 @@ type ConnectionManagerLike = {
     private _registrarTopologyIds;
+    private _peerConnectListener?;
+    private _peerDisconnectListener?;
     private readonly maxInboundStreams?;
@@ -220,3 +242,11 @@ private readonly maxOutboundStreams?;
     private prunedConnectionsCache?;
+    private pruneToLimitsInFlight?;
+    private _startInFlight?;
     private routeMaxRetentionPeriod;
+    private routeCacheMaxFromEntries?;
+    private routeCacheMaxTargetsPerFrom?;
+    private routeCacheMaxRelaysPerTarget?;
+    private readonly sharedRouting;
+    private sharedRoutingKey?;
+    private sharedRoutingState?;
     outboundInflightQueue: Pushable<{
@@ -226,3 +256,2 @@ connection: Connection;
     }>;
-    routeSeekInterval: number;
     seekTimeout: number;
@@ -234,3 +263,5 @@ closeController: AbortController;
     constructor(components: DirectStreamComponents, multicodecs: string[], options?: DirectStreamOptions);
+    private pruneConnectionsToLimits;
     start(): Promise<void>;
+    private _startImpl;
     /**
@@ -262,2 +293,4 @@ * Unregister the pubsub protocol and the streams with other peers will be closed.
     invalidateSession(key: string): void;
+    getRouteHints(target: string, from?: string): DirectStreamAckRouteHint[];
+    getBestRouteHint(target: string, from?: string): DirectStreamAckRouteHint | undefined;
     onPeerSession(key: PublicSignKey, session: number): void;
@@ -296,3 +329,3 @@ /**
         skipRecipientValidation?: boolean;
-    } & WithExtraSigners): Promise<DataMessage<SilentDelivery | AcknowledgeDelivery | SeekDelivery | AnyWhere>>;
+    } & WithExtraSigners): Promise<DataMessage<SilentDelivery | AcknowledgeDelivery | AcknowledgeAnyWhere | AnyWhere>>;
     /**
@@ -304,2 +337,3 @@ * Publishes messages to all peers
     private clearHealthcheckTimer;
+    private formatDeliveryDebugState;
     private createDeliveryPromise;
@@ -306,0 +340,0 @@ publishMessage(from: PublicSignKey, message: Message, to?: PeerStreams[] | Map<string, PeerStreams>, relayed?: boolean, signal?: AbortSignal): Promise<void>;

dist/src/index.d.ts.map

@@ -1,1 +0,1 @@
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dist/src/routes.d.ts

@@ -0,1 +1,2 @@
+import type { DirectStreamAckRouteHint } from "@peerbit/stream-interface";
 export declare const MAX_ROUTE_DISTANCE: number;
@@ -5,2 +6,3 @@ type RelayInfo = {
     hash: string;
+    updatedAt: number;
     expireAt?: number;
@@ -22,7 +24,18 @@ distance: number;
     signal?: AbortSignal;
+    private pendingCleanupByFrom;
+    private cleanupTimer?;
+    private maxFromEntries;
+    private maxTargetsPerFrom;
+    private maxRelaysPerTarget;
     constructor(me: string, options?: {
         routeMaxRetentionPeriod?: number;
         signal?: AbortSignal;
+        maxFromEntries?: number;
+        maxTargetsPerFrom?: number;
+        maxRelaysPerTarget?: number;
     });
     clear(): void;
+    private requestCleanup;
+    private pruneFromMaps;
+    private pruneTargets;
     private cleanup;
@@ -38,2 +51,4 @@ add(from: string, neighbour: string, target: string, distance: number, session: number, remoteSession: number): "new" | "updated" | "restart";
     findNeighbor(from: string, target: string): RouteInfo;
+    getRouteHints(from: string, target: string): DirectStreamAckRouteHint[];
+    getBestRouteHint(from: string, target: string): DirectStreamAckRouteHint | undefined;
     isReachable(from: string, target: string, maxDistance?: number): boolean;
@@ -40,0 +55,0 @@ hasTarget(target: string): boolean;

dist/src/routes.d.ts.map

@@ -1,1 +0,1 @@
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dist/src/routes.js

@@ -1,3 +0,5 @@
-import { AbortError, delay } from "@peerbit/time";
 export const MAX_ROUTE_DISTANCE = Number.MAX_SAFE_INTEGER - 1;
+const DEFAULT_MAX_FROM_ENTRIES = 2048;
+const DEFAULT_MAX_TARGETS_PER_FROM = 10_000;
+const DEFAULT_MAX_RELAYS_PER_TARGET = 32;
 const sortRoutes = (routes) => {
@@ -28,2 +30,7 @@ // sort by distance, if same distance make the routes without expire time first
     signal;
+    pendingCleanupByFrom = new Map();
+    cleanupTimer;
+    maxFromEntries;
+    maxTargetsPerFrom;
+    maxRelaysPerTarget;
     constructor(me, options) {
@@ -34,6 +41,73 @@ this.me = me;
         this.signal = options?.signal;
+        this.maxFromEntries = Math.max(1, Math.floor(options?.maxFromEntries ?? DEFAULT_MAX_FROM_ENTRIES));
+        this.maxTargetsPerFrom = Math.max(1, Math.floor(options?.maxTargetsPerFrom ?? DEFAULT_MAX_TARGETS_PER_FROM));
+        this.maxRelaysPerTarget = Math.max(1, Math.floor(options?.maxRelaysPerTarget ?? DEFAULT_MAX_RELAYS_PER_TARGET));
     }
     clear() {
         this.routes.clear();
+        this.pendingCleanupByFrom.clear();
+        if (this.cleanupTimer)
+            clearTimeout(this.cleanupTimer);
+        this.cleanupTimer = undefined;
     }
+    requestCleanup(from, to) {
+        if (this.signal?.aborted)
+            return;
+        let targets = this.pendingCleanupByFrom.get(from);
+        if (!targets) {
+            targets = new Set();
+            this.pendingCleanupByFrom.set(from, targets);
+        }
+        targets.add(to);
+        // Coalesce cleanups into a single timer. The previous per-update timer approach
+        // scales poorly in large networks and can OOM in single-process simulations.
+        if (this.cleanupTimer)
+            return;
+        this.cleanupTimer = setTimeout(() => {
+            this.cleanupTimer = undefined;
+            const pending = this.pendingCleanupByFrom;
+            this.pendingCleanupByFrom = new Map();
+            for (const [fromKey, tos] of pending) {
+                for (const toKey of tos) {
+                    this.cleanup(fromKey, toKey);
+                }
+            }
+        }, this.routeMaxRetentionPeriod + 100);
+    }
+    pruneFromMaps() {
+        if (this.routes.size <= this.maxFromEntries)
+            return;
+        // Keep `me` pinned: local routes are used for pruning decisions and should be
+        // the last thing we evict under memory pressure.
+        while (this.routes.size > this.maxFromEntries) {
+            const oldest = this.routes.keys().next().value;
+            if (!oldest)
+                return;
+            if (oldest === this.me) {
+                const selfMap = this.routes.get(oldest);
+                if (!selfMap) {
+                    this.routes.delete(oldest);
+                    continue;
+                }
+                // Move to the end (most recently used) and continue eviction.
+                this.routes.delete(oldest);
+                this.routes.set(oldest, selfMap);
+                continue;
+            }
+            this.routes.delete(oldest);
+        }
+    }
+    pruneTargets(from, fromMap) {
+        if (fromMap.size <= this.maxTargetsPerFrom)
+            return;
+        while (fromMap.size > this.maxTargetsPerFrom) {
+            const oldestTarget = fromMap.keys().next().value;
+            if (!oldestTarget)
+                break;
+            fromMap.delete(oldestTarget);
+        }
+        if (fromMap.size === 0) {
+            this.routes.delete(from);
+        }
+    }
     cleanup(from, to) {
@@ -55,2 +129,5 @@ const fromMap = this.routes.get(from);
                 }
+                if (keepRoutes.length > this.maxRelaysPerTarget) {
+                    keepRoutes.length = this.maxRelaysPerTarget;
+                }
                 if (keepRoutes.length > 0) {
@@ -74,2 +151,7 @@ map.list = keepRoutes;
         }
+        else {
+            // LRU-touch the `from` map.
+            this.routes.delete(from);
+            this.routes.set(from, fromMap);
+        }
         let prev = fromMap.get(target);
@@ -83,2 +165,7 @@ const routeDidExist = prev;
         }
+        else {
+            // LRU-touch the target entry.
+            fromMap.delete(target);
+            fromMap.set(target, prev);
+        }
         const isRelayed = from !== this.me;
@@ -100,15 +187,2 @@ const targetIsNeighbour = neighbour === target;
         prev.session = Math.max(session, prev.session);
-        const scheduleCleanup = () => {
-            return delay(this.routeMaxRetentionPeriod + 100, { signal: this.signal })
-                .then(() => {
-                this.cleanup(from, target);
-            })
-                .catch((e) => {
-                if (e instanceof AbortError) {
-                    // skip
-                    return;
-                }
-                throw e;
-            });
-        };
         // Update routes and cleanup all old routes that are older than latest session - some threshold
@@ -128,7 +202,7 @@ if (isNewSession) {
             if (distance !== -1 && foundNodeToExpire) {
-                scheduleCleanup();
+                this.requestCleanup(from, target);
             }
         }
         else if (isOldSession) {
-            scheduleCleanup();
+            this.requestCleanup(from, target);
         }
@@ -144,4 +218,10 @@ // Modify list for new/update route
                         route.session = session;
+                        route.updatedAt = +new Date();
                         route.expireAt = undefined; // remove expiry since we updated
                         sortRoutes(prev.list);
+                        if (prev.list.length > this.maxRelaysPerTarget) {
+                            prev.list.length = this.maxRelaysPerTarget;
+                        }
+                        this.pruneTargets(from, fromMap);
+                        this.pruneFromMaps();
                         return isNewRemoteSession ? "restart" : "updated";
@@ -151,3 +231,9 @@ }
                         route.session = session;
+                        route.updatedAt = +new Date();
                         route.expireAt = undefined; // remove expiry since we updated
+                        if (prev.list.length > this.maxRelaysPerTarget) {
+                            prev.list.length = this.maxRelaysPerTarget;
+                        }
+                        this.pruneTargets(from, fromMap);
+                        this.pruneFromMaps();
                         return isNewRemoteSession ? "restart" : "updated";
@@ -168,2 +254,3 @@ }
                 hash: neighbour,
+                updatedAt: +new Date(),
                 expireAt: isOldSession
@@ -174,3 +261,8 @@ ? +new Date() + this.routeMaxRetentionPeriod
             sortRoutes(prev.list);
+            if (prev.list.length > this.maxRelaysPerTarget) {
+                prev.list.length = this.maxRelaysPerTarget;
+            }
         }
+        this.pruneTargets(from, fromMap);
+        this.pruneFromMaps();
         return exist ? (isNewRemoteSession ? "restart" : "updated") : "new";
@@ -229,2 +321,29 @@ }
     }
+    getRouteHints(from, target) {
+        const route = this.routes.get(from)?.get(target);
+        if (!route) {
+            return [];
+        }
+        const now = Date.now();
+        const out = [];
+        for (const next of route.list) {
+            if (next.expireAt != null && next.expireAt < now) {
+                continue;
+            }
+            out.push({
+                kind: "directstream-ack",
+                from,
+                target,
+                nextHop: next.hash,
+                distance: next.distance,
+                session: next.session,
+                updatedAt: next.updatedAt,
+                expiresAt: next.expireAt,
+            });
+        }
+        return out;
+    }
+    getBestRouteHint(from, target) {
+        return this.getRouteHints(from, target)[0];
+    }
     isReachable(from, target, maxDistance = MAX_ROUTE_DISTANCE) {
@@ -231,0 +350,0 @@ const remoteInfo = this.remoteInfo.get(target);

dist/src/routes.js.map

@@ -1,1 +0,1 @@
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dist/src/wait-for-event.d.ts.map

@@ -1,1 +0,1 @@
-{"version":3,"file":"wait-for-event.d.ts","sourceRoot":"","sources":["../../src/wait-for-event.ts"],"names":[],"mappings":"AAAA,OAAO,KAAK,EAAE,iBAAiB,EAAE,MAAM,mBAAmB,CAAC;AAE3D,OAAe,EAAE,KAAK,eAAe,EAAE,MAAM,SAAS,CAAC;AAEvD,wBAAgB,YAAY,CAC3B,OAAO,SAAS,iBAAiB,CAAC,MAAM,CAAC,EACzC,MAAM,SAAS,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,GAAG,OAAO,SAAS,iBAAiB,CACrE,MAAM,CAAC,CACP,GACE,CAAC,GACD,KAAK,EACR,KAAK,SAAS,MAAM,MAAM,GAAG,MAAM,MAAM,EAEzC,OAAO,EAAE,OAAO,EAChB,MAAM,EAAE,KAAK,EAAE,EACf,QAAQ,EAAE,CAAC,QAAQ,EAAE,eAAe,CAAC,IAAI,CAAC,KAAK,IAAI,GAAG,OAAO,CAAC,IAAI,CAAC,EACnE,OAAO,CAAC,EAAE;IACT,OAAO,CAAC,EAAE,WAAW,EAAE,CAAC;IACxB,OAAO,CAAC,EAAE,MAAM,CAAC;CACjB,GACC,OAAO,CAAC,IAAI,CAAC,CAuDf"}
+{"version":3,"file":"wait-for-event.d.ts","sourceRoot":"","sources":["../../src/wait-for-event.ts"],"names":[],"mappings":"AAAA,OAAO,KAAK,EAAE,iBAAiB,EAAE,MAAM,mBAAmB,CAAC;AAE3D,OAAe,EAAE,KAAK,eAAe,EAAE,MAAM,SAAS,CAAC;AAEvD,wBAAgB,YAAY,CAC3B,OAAO,SAAS,iBAAiB,CAAC,MAAM,CAAC,EACzC,MAAM,SAAS,MAAM,CAAC,MAAM,EAAE,GAAG,CAAC,GAAG,OAAO,SAAS,iBAAiB,CACrE,MAAM,CAAC,CACP,GACE,CAAC,GACD,KAAK,EACR,KAAK,SAAS,MAAM,MAAM,GAAG,MAAM,MAAM,EAEzC,OAAO,EAAE,OAAO,EAChB,MAAM,EAAE,KAAK,EAAE,EACf,QAAQ,EAAE,CAAC,QAAQ,EAAE,eAAe,CAAC,IAAI,CAAC,KAAK,IAAI,GAAG,OAAO,CAAC,IAAI,CAAC,EACnE,OAAO,CAAC,EAAE;IACT,OAAO,CAAC,EAAE,WAAW,EAAE,CAAC;IACxB,OAAO,CAAC,EAAE,MAAM,CAAC;CACjB,GACC,OAAO,CAAC,IAAI,CAAC,CAoEf"}

dist/src/wait-for-event.js

 import { AbortError, TimeoutError } from "@peerbit/time";
 import pDefer, {} from "p-defer";
 export function waitForEvent(emitter, events, resolver, options) {
+    const traceEnabled = globalThis?.process?.env?.PEERBIT_WAITFOREVENT_TRACE === "1";
+    const callsite = traceEnabled ? new Error("waitForEvent callsite").stack : undefined;
     const deferred = pDefer();
@@ -17,3 +19,4 @@ const abortFn = (e) => {
     let timeout = undefined;
-    deferred.promise.finally(() => {
+    void deferred.promise
+        .finally(() => {
         for (const event of events) {
@@ -24,3 +27,5 @@ emitter.removeEventListener(event, checkIsReady);
         options?.signals?.forEach((signal) => signal.removeEventListener("abort", abortFn));
-    });
+    })
+        // Avoid triggering an unhandled rejection from the `.finally()` return promise.
+        .catch(() => { });
     const abortedSignal = options?.signals?.find((signal) => signal.aborted);
@@ -36,3 +41,9 @@ if (abortedSignal) {
     }
-    timeout = setTimeout(() => abortFn(new TimeoutError("Timeout waiting for event")), options?.timeout ?? 10 * 1000);
+    timeout = setTimeout(() => {
+        const err = new TimeoutError("Timeout waiting for event");
+        if (callsite && err.stack) {
+            err.stack += `\n\n${callsite}`;
+        }
+        abortFn(err);
+    }, options?.timeout ?? 10 * 1000);
     options?.signals?.forEach((signal) => signal.addEventListener("abort", abortFn));
@@ -39,0 +50,0 @@ resolver(deferred);

dist/src/wait-for-event.js.map

@@ -1,1 +0,1 @@
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+{"version":3,"file":"wait-for-event.js","sourceRoot":"","sources":["../../src/wait-for-event.ts"],"names":[],"mappings":"AACA,OAAO,EAAE,UAAU,EAAE,YAAY,EAAE,MAAM,eAAe,CAAC;AACzD,OAAO,MAAM,EAAE,EAAwB,MAAM,SAAS,CAAC;AAEvD,MAAM,UAAU,YAAY,CAS3B,OAAgB,EAChB,MAAe,EACf,QAAmE,EACnE,OAGC;IAED,MAAM,YAAY,GAChB,UAAkB,EAAE,OAAO,EAAE,GAAG,EAAE,0BAA0B,KAAK,GAAG,CAAC;IACvE,MAAM,QAAQ,GAAG,YAAY,CAAC,CAAC,CAAC,IAAI,KAAK,CAAC,uBAAuB,CAAC,CAAC,KAAK,CAAC,CAAC,CAAC,SAAS,CAAC;IAErF,MAAM,QAAQ,GAAG,MAAM,EAAQ,CAAC;IAChC,MAAM,OAAO,GAAG,CAAC,CAAW,EAAE,EAAE;QAC/B,IAAI,CAAC,YAAY,KAAK,EAAE,CAAC;YACxB,QAAQ,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC;YACnB,OAAO;QACR,CAAC;QAED,MAAM,MAAM,GAAI,CAAS,EAAE,MAAM,EAAE,MAAM,CAAC;QAC1C,QAAQ,CAAC,MAAM,CACd,MAAM;YACL,IAAI,UAAU,CACb,6BAA6B;gBAC5B,MAAM,CAAC,MAAM,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,CAC1D,CACF,CAAC;IACH,CAAC,CAAC;IAEF,MAAM,YAAY,GAAG,CAAC,GAAG,IAAW,EAAE,EAAE,CAAC,QAAQ,CAAC,QAAQ,CAAC,CAAC;IAC5D,IAAI,OAAO,GAA8C,SAAS,CAAC;IAEnE,KAAK,QAAQ,CAAC,OAAO;SACnB,OAAO,CAAC,GAAG,EAAE;QACb,KAAK,MAAM,KAAK,IAAI,MAAM,EAAE,CAAC;YAC5B,OAAO,CAAC,mBAAmB,CAAC,KAAY,EAAE,YAAmB,CAAC,CAAC;QAChE,CAAC;QACD,OAAO,IAAI,YAAY,CAAC,OAAO,CAAC,CAAC;QACjC,OAAO,EAAE,OAAO,EAAE,OAAO,CAAC,CAAC,MAAM,EAAE,EAAE,CACpC,MAAM,CAAC,mBAAmB,CAAC,OAAO,EAAE,OAAO,CAAC,CAC5C,CAAC;IACH,CAAC,CAAC;QACF,gFAAgF;SAC/E,KAAK,CAAC,GAAG,EAAE,GAAE,CAAC,CAAC,CAAC;IAElB,MAAM,aAAa,GAAG,OAAO,EAAE,OAAO,EAAE,IAAI,CAAC,CAAC,MAAM,EAAE,EAAE,CAAC,MAAM,CAAC,OAAO,CAAC,CAAC;IACzE,IAAI,aAAa,EAAE,CAAC;QACnB,QAAQ,CAAC,MAAM,CACd,aAAa,CAAC,MAAM;YACnB,IAAI,UAAU,CACb,6BAA6B;gBAC5B,MAAM,CAAC,MAAM,CAAC,MAAM,GAAG,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,IAAI,CAAC,IAAI,CAAC,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,CAAC,CAC1D,CACF,CAAC;QACF,OAAO,QAAQ,CAAC,OAAO,CAAC;IACzB,CAAC;IAED,KAAK,MAAM,KAAK,IAAI,MAAM,EAAE,CAAC;QAC5B,OAAO,CAAC,gBAAgB,CAAC,KAAY,EAAE,YAAmB,CAAC,CAAC;IAC7D,CAAC;IACD,OAAO,GAAG,UAAU,CACnB,GAAG,EAAE;QACJ,MAAM,GAAG,GAAG,IAAI,YAAY,CAAC,2BAA2B,CAAC,CAAC;QAC1D,IAAI,QAAQ,IAAI,GAAG,CAAC,KAAK,EAAE,CAAC;YAC3B,GAAG,CAAC,KAAK,IAAI,OAAO,QAAQ,EAAE,CAAC;QAChC,CAAC;QACD,OAAO,CAAC,GAAG,CAAC,CAAC;IACd,CAAC,EACD,OAAO,EAAE,OAAO,IAAI,EAAE,GAAG,IAAI,CAC7B,CAAC;IACF,OAAO,EAAE,OAAO,EAAE,OAAO,CAAC,CAAC,MAAM,EAAE,EAAE,CACpC,MAAM,CAAC,gBAAgB,CAAC,OAAO,EAAE,OAAO,CAAC,CACzC,CAAC;IACD,QAAgB,CAAC,QAAQ,CAAC,CAAC;IAC5B,OAAO,QAAQ,CAAC,OAAO,CAAC;AACzB,CAAC"}

package.json

 {
   "name": "@peerbit/stream",
-  "version": "4.6.0-91f84d0",
+  "version": "4.6.0-9b39434",
   "description": "A building block for direct streaming protocols",
@@ -72,3 +72,3 @@ "sideEffects": false,
   "devDependencies": {
-    "@peerbit/libp2p-test-utils": "2.2.0-91f84d0",
+    "@peerbit/libp2p-test-utils": "2.2.0-9b39434",
     "@types/fast-fifo": "^1.0.2",
@@ -102,10 +102,10 @@ "@types/sinon": "^10.0.20",
     "yallist": "^5.0.0",
-    "@peerbit/cache": "2.2.0-91f84d0",
-    "@peerbit/crypto": "2.4.1-91f84d0",
-    "@peerbit/logger": "2.0.0-91f84d0",
-    "@peerbit/stream-interface": "5.4.0-91f84d0",
-    "@peerbit/time": "2.3.0-91f84d0"
+    "@peerbit/cache": "2.2.0-9b39434",
+    "@peerbit/crypto": "2.4.1-9b39434",
+    "@peerbit/logger": "2.0.0-9b39434",
+    "@peerbit/stream-interface": "5.4.0-9b39434",
+    "@peerbit/time": "2.3.0-9b39434"
   },
   "scripts": {
-    "bench": "node --loader ts-node/esm ./benchmark/index.ts",
+    "bench": "TS_NODE_PROJECT=../../../tsconfig.json node --loader ts-node/esm ./benchmark/index.ts",
     "clean": "aegir clean",
@@ -112,0 +112,0 @@ "build": "aegir build --no-bundle",

src/routes.ts

@@ -1,8 +0,13 @@
-import { AbortError, delay } from "@peerbit/time";
+import type { DirectStreamAckRouteHint } from "@peerbit/stream-interface";
 
 export const MAX_ROUTE_DISTANCE = Number.MAX_SAFE_INTEGER - 1;
 
+const DEFAULT_MAX_FROM_ENTRIES = 2048;
+const DEFAULT_MAX_TARGETS_PER_FROM = 10_000;
+const DEFAULT_MAX_RELAYS_PER_TARGET = 32;
+
 type RelayInfo = {
 	session: number;
 	hash: string;
+	updatedAt: number;
 	expireAt?: number;
@@ -47,5 +52,17 @@ distance: number;
 
+	private pendingCleanupByFrom: Map<string, Set<string>> = new Map();
+	private cleanupTimer?: ReturnType<typeof setTimeout>;
+	private maxFromEntries: number;
+	private maxTargetsPerFrom: number;
+	private maxRelaysPerTarget: number;
+
 	constructor(
 		readonly me: string,
-		options?: { routeMaxRetentionPeriod?: number; signal?: AbortSignal },
+		options?: {
+			routeMaxRetentionPeriod?: number;
+			signal?: AbortSignal;
+			maxFromEntries?: number;
+			maxTargetsPerFrom?: number;
+			maxRelaysPerTarget?: number;
+		},
 	) {
@@ -55,2 +72,14 @@ this.routeMaxRetentionPeriod =
 		this.signal = options?.signal;
+		this.maxFromEntries = Math.max(
+			1,
+			Math.floor(options?.maxFromEntries ?? DEFAULT_MAX_FROM_ENTRIES),
+		);
+		this.maxTargetsPerFrom = Math.max(
+			1,
+			Math.floor(options?.maxTargetsPerFrom ?? DEFAULT_MAX_TARGETS_PER_FROM),
+		);
+		this.maxRelaysPerTarget = Math.max(
+			1,
+			Math.floor(options?.maxRelaysPerTarget ?? DEFAULT_MAX_RELAYS_PER_TARGET),
+		);
 	}
@@ -60,4 +89,66 @@
 		this.routes.clear();
+		this.pendingCleanupByFrom.clear();
+		if (this.cleanupTimer) clearTimeout(this.cleanupTimer);
+		this.cleanupTimer = undefined;
 	}
 
+	private requestCleanup(from: string, to: string) {
+		if (this.signal?.aborted) return;
+		let targets = this.pendingCleanupByFrom.get(from);
+		if (!targets) {
+			targets = new Set<string>();
+			this.pendingCleanupByFrom.set(from, targets);
+		}
+		targets.add(to);
+
+		// Coalesce cleanups into a single timer. The previous per-update timer approach
+		// scales poorly in large networks and can OOM in single-process simulations.
+		if (this.cleanupTimer) return;
+		this.cleanupTimer = setTimeout(() => {
+			this.cleanupTimer = undefined;
+			const pending = this.pendingCleanupByFrom;
+			this.pendingCleanupByFrom = new Map();
+			for (const [fromKey, tos] of pending) {
+				for (const toKey of tos) {
+					this.cleanup(fromKey, toKey);
+				}
+			}
+		}, this.routeMaxRetentionPeriod + 100);
+	}
+
+	private pruneFromMaps() {
+		if (this.routes.size <= this.maxFromEntries) return;
+
+		// Keep `me` pinned: local routes are used for pruning decisions and should be
+		// the last thing we evict under memory pressure.
+		while (this.routes.size > this.maxFromEntries) {
+			const oldest = this.routes.keys().next().value as string | undefined;
+			if (!oldest) return;
+			if (oldest === this.me) {
+				const selfMap = this.routes.get(oldest);
+				if (!selfMap) {
+					this.routes.delete(oldest);
+					continue;
+				}
+				// Move to the end (most recently used) and continue eviction.
+				this.routes.delete(oldest);
+				this.routes.set(oldest, selfMap);
+				continue;
+			}
+			this.routes.delete(oldest);
+		}
+	}
+
+	private pruneTargets(from: string, fromMap: Map<string, RouteInfo>) {
+		if (fromMap.size <= this.maxTargetsPerFrom) return;
+		while (fromMap.size > this.maxTargetsPerFrom) {
+			const oldestTarget = fromMap.keys().next().value as string | undefined;
+			if (!oldestTarget) break;
+			fromMap.delete(oldestTarget);
+		}
+		if (fromMap.size === 0) {
+			this.routes.delete(from);
+		}
+	}
+
 	private cleanup(from: string, to: string) {
@@ -79,2 +170,6 @@ const fromMap = this.routes.get(from);
 
+				if (keepRoutes.length > this.maxRelaysPerTarget) {
+					keepRoutes.length = this.maxRelaysPerTarget;
+				}
+
 				if (keepRoutes.length > 0) {
@@ -103,2 +198,6 @@ map.list = keepRoutes;
 			this.routes.set(from, fromMap);
+		} else {
+			// LRU-touch the `from` map.
+			this.routes.delete(from);
+			this.routes.set(from, fromMap);
 		}
@@ -114,2 +213,6 @@
 			fromMap.set(target, prev);
+		} else {
+			// LRU-touch the target entry.
+			fromMap.delete(target);
+			fromMap.set(target, prev);
 		}
@@ -136,16 +239,2 @@
 
-		const scheduleCleanup = () => {
-			return delay(this.routeMaxRetentionPeriod + 100, { signal: this.signal })
-				.then(() => {
-					this.cleanup(from, target);
-				})
-				.catch((e) => {
-					if (e instanceof AbortError) {
-						// skip
-						return;
-					}
-					throw e;
-				});
-		};
-
 		// Update routes and cleanup all old routes that are older than latest session - some threshold
@@ -166,6 +255,6 @@ if (isNewSession) {
 			if (distance !== -1 && foundNodeToExpire) {
-				scheduleCleanup();
+				this.requestCleanup(from, target);
 			}
 		} else if (isOldSession) {
-			scheduleCleanup();
+			this.requestCleanup(from, target);
 		}
@@ -182,8 +271,20 @@
 						route.session = session;
+						route.updatedAt = +new Date();
 						route.expireAt = undefined; // remove expiry since we updated
 						sortRoutes(prev.list);
+						if (prev.list.length > this.maxRelaysPerTarget) {
+							prev.list.length = this.maxRelaysPerTarget;
+						}
+						this.pruneTargets(from, fromMap);
+						this.pruneFromMaps();
 						return isNewRemoteSession ? "restart" : "updated";
 					} else if (route.distance === distance) {
 						route.session = session;
+						route.updatedAt = +new Date();
 						route.expireAt = undefined; // remove expiry since we updated
+						if (prev.list.length > this.maxRelaysPerTarget) {
+							prev.list.length = this.maxRelaysPerTarget;
+						}
+						this.pruneTargets(from, fromMap);
+						this.pruneFromMaps();
 						return isNewRemoteSession ? "restart" : "updated";
@@ -206,2 +307,3 @@ }
 				hash: neighbour,
+				updatedAt: +new Date(),
 				expireAt: isOldSession
@@ -212,4 +314,10 @@ ? +new Date() + this.routeMaxRetentionPeriod
 			sortRoutes(prev.list);
+			if (prev.list.length > this.maxRelaysPerTarget) {
+				prev.list.length = this.maxRelaysPerTarget;
+			}
 		}
 
+		this.pruneTargets(from, fromMap);
+		this.pruneFromMaps();
+
 		return exist ? (isNewRemoteSession ? "restart" : "updated") : "new";
@@ -276,2 +384,34 @@ }
 
+	getRouteHints(from: string, target: string): DirectStreamAckRouteHint[] {
+		const route = this.routes.get(from)?.get(target);
+		if (!route) {
+			return [];
+		}
+		const now = Date.now();
+		const out: DirectStreamAckRouteHint[] = [];
+		for (const next of route.list) {
+			if (next.expireAt != null && next.expireAt < now) {
+				continue;
+			}
+			out.push({
+				kind: "directstream-ack",
+				from,
+				target,
+				nextHop: next.hash,
+				distance: next.distance,
+				session: next.session,
+				updatedAt: next.updatedAt,
+				expiresAt: next.expireAt,
+			});
+		}
+		return out;
+	}
+
+	getBestRouteHint(
+		from: string,
+		target: string,
+	): DirectStreamAckRouteHint | undefined {
+		return this.getRouteHints(from, target)[0];
+	}
+
 	isReachable(from: string, target: string, maxDistance = MAX_ROUTE_DISTANCE) {
@@ -278,0 +418,0 @@ const remoteInfo = this.remoteInfo.get(target);

src/wait-for-event.ts

@@ -22,2 +22,6 @@ import type { TypedEventEmitter } from "@libp2p/interface";
 ): Promise<void> {
+	const traceEnabled =
+		(globalThis as any)?.process?.env?.PEERBIT_WAITFOREVENT_TRACE === "1";
+	const callsite = traceEnabled ? new Error("waitForEvent callsite").stack : undefined;
+
 	const deferred = pDefer<void>();
@@ -43,11 +47,14 @@ const abortFn = (e?: unknown) => {
 
-	deferred.promise.finally(() => {
-		for (const event of events) {
-			emitter.removeEventListener(event as any, checkIsReady as any);
-		}
-		timeout && clearTimeout(timeout);
-		options?.signals?.forEach((signal) =>
-			signal.removeEventListener("abort", abortFn),
-		);
-	});
+	void deferred.promise
+		.finally(() => {
+			for (const event of events) {
+				emitter.removeEventListener(event as any, checkIsReady as any);
+			}
+			timeout && clearTimeout(timeout);
+			options?.signals?.forEach((signal) =>
+				signal.removeEventListener("abort", abortFn),
+			);
+		})
+		// Avoid triggering an unhandled rejection from the `.finally()` return promise.
+		.catch(() => {});
 
@@ -70,3 +77,9 @@ const abortedSignal = options?.signals?.find((signal) => signal.aborted);
 	timeout = setTimeout(
-		() => abortFn(new TimeoutError("Timeout waiting for event")),
+		() => {
+			const err = new TimeoutError("Timeout waiting for event");
+			if (callsite && err.stack) {
+				err.stack += `\n\n${callsite}`;
+			}
+			abortFn(err);
+		},
 		options?.timeout ?? 10 * 1000,
@@ -73,0 +86,0 @@ );

New alerts

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

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Fixed alerts

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

URL strings

Supply chain risk

Package contains fragments of external URLs or IP addresses, which the package may be accessing at runtime.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

502808

32.57%

Number of package files

54

45.95%

Lines of code

8979

24.33%

Number of low supply chain risk alerts

12

-7.69%

Dependency changes

• + Added

  @peerbit/cache@2.2.0-9b39434
  (transitive)

• + Added

  @peerbit/crypto@2.4.1-9b39434
  (transitive)

• + Added

  @peerbit/logger@2.0.0-9b39434
  (transitive)

• + Added

  @peerbit/stream-interface@5.4.0-9b39434
  (transitive)

• + Added

  @peerbit/time@2.3.0-9b39434
  (transitive)

• - Removed

  @peerbit/cache@2.2.0-91f84d0
  (transitive)

• - Removed

  @peerbit/crypto@2.4.1-91f84d0
  (transitive)

• - Removed

  @peerbit/logger@2.0.0-91f84d0
  (transitive)

• - Removed

  @peerbit/stream-interface@5.4.0-91f84d0
  (transitive)

• - Removed

  @peerbit/time@2.3.0-91f84d0
  (transitive)

• Updated

  @peerbit/cache@2.2.0-9b39434

• Updated

  @peerbit/crypto@2.4.1-9b39434

• Updated

  @peerbit/logger@2.0.0-9b39434

• Updated

  @peerbit/stream-interface@5.4.0-9b39434

• Updated

  @peerbit/time@2.3.0-9b39434