test: fix few e2e flaky tests (#7762)

**Motivation**

Make our tests more stable on CI. 

**Description**

Fix following flaky tests 

- `packages/beacon-node/test/e2e/network/reqresp.test.ts` 
- [AxiosError: Request failed with status code
429](https://github.com/ChainSafe/lodestar/actions/runs/14731164867/job/41349996153?pr=7762#step:6:10755)


Partially Closes #6358

**Steps to test or reproduce**

- Run all tests on CI

configs/vitest.config.e2e.ts

@@ -19,6 +19,10 @@ export const e2eProject = defineProject({
         singleFork: true,
       },
     },
+    sequence: {
+      concurrent: false,
+      shuffle: false,
+    },
   },
 });
 
@@ -41,5 +45,9 @@ export const e2eMainnetProject = defineProject({
         singleFork: true,
       },
     },
+    sequence: {
+      concurrent: false,
+      shuffle: false,
+    },
   },
 });

packages/beacon-node/src/network/libp2p/index.ts

@@ -84,7 +84,7 @@ export async function createNodeJsLibp2p(
         },
       }),
     ],
-    streamMuxers: [mplex({maxInboundStreams: 256})],
+    streamMuxers: [mplex({maxInboundStreams: 256, disconnectThreshold: networkOpts.disconnectThreshold})],
     peerDiscovery,
     metrics: nodeJsLibp2pOpts.metrics
       ? prometheusMetrics({

packages/beacon-node/src/network/network.ts

@@ -221,10 +221,10 @@ export class Network implements INetwork {
     this.chain.emitter.off(routes.events.EventType.lightClientFinalityUpdate, this.onLightClientFinalityUpdate);
     this.chain.emitter.off(routes.events.EventType.lightClientOptimisticUpdate, this.onLightClientOptimisticUpdate);
     await this.core.close();
-    this.logger.debug("network core closed");
 
     // Used only for sleep() statements
     this.controller.abort();
+    this.logger.debug("network core closed");
   }
 
   async scrapeMetrics(): Promise<string> {

packages/beacon-node/src/network/options.ts

@@ -23,6 +23,25 @@ export interface NetworkOptions
   useWorker?: boolean;
   maxYoungGenerationSizeMb?: number;
   disableLightClientServer?: boolean;
+
+  /**
+   * During E2E tests observe a lot of following `missing stream`:
+   *
+   * > libp2p:mplex receiver stream with id 2 and protocol /eth2/beacon_chain/req/metadata/2/ssz_snappy ended
+   * > libp2p:mplex initiator stream with id 4 and protocol /eth2/beacon_chain/req/metadata/2/ssz_snappy ended
+   * > libp2p:mplex initiator stream with id 2 and protocol /eth2/beacon_chain/req/metadata/2/ssz_snappy ended
+   * > libp2p:mplex missing stream 2 for message type CLOSE_INITIATOR
+   * > libp2p:mplex missing stream 2 for message type CLOSE_RECEIVER
+   * > libp2p:mplex missing stream 4 for message type CLOSE_INITIATOR
+   *
+   * which results in following rate-limit error and cause the connection to close and fail the e2e tests
+   * > libp2p:mplex rate limit hit when receiving messages for streams that do not exist - closing remote connection
+   * > libp2p:mplex:stream:initiator:3 abort with error Error: Too many messages for missing streams
+   *
+   * The default value for `disconnectThreshold` in libp2p is set to `5`.
+   * We need to increase this only for the testing purpose
+   */
+  disconnectThreshold?: number;
 }
 
 export const defaultNetworkOptions: NetworkOptions = {

packages/beacon-node/test/e2e/network/reqresp.test.ts

@@ -3,7 +3,7 @@ import {chainConfig} from "@lodestar/config/default";
 import {ForkName} from "@lodestar/params";
 import {RequestError, RequestErrorCode, ResponseOutgoing} from "@lodestar/reqresp";
 import {Root, SignedBeaconBlock, altair, phase0, ssz} from "@lodestar/types";
-import {sleep as _sleep} from "@lodestar/utils";
+import {sleep} from "@lodestar/utils";
 import {afterEach, beforeEach, describe, expect, it, vi} from "vitest";
 import {Network, ReqRespBeaconNodeOpts} from "../../../src/network/index.js";
 import {GetReqRespHandlerFn, ReqRespMethod} from "../../../src/network/reqresp/types.js";
@@ -33,8 +33,14 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     ...chainConfig,
     ALTAIR_FORK_EPOCH: 0,
   });
+  let controller: AbortController;
 
   const afterEachCallbacks: (() => Promise<void> | void)[] = [];
+
+  beforeEach(() => {
+    controller = new AbortController();
+  });
+
   afterEach(async () => {
     while (afterEachCallbacks.length > 0) {
       const callback = afterEachCallbacks.pop();
@@ -42,15 +48,6 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     }
   });
 
-  let controller: AbortController;
-  beforeEach(() => {
-    controller = new AbortController();
-  });
-  afterEach(() => controller.abort());
-  async function sleep(ms: number): Promise<void> {
-    await _sleep(ms, controller.signal);
-  }
-
   async function createAndConnectPeers(
     getReqRespHandler?: GetReqRespHandlerFn,
     opts?: ReqRespBeaconNodeOpts
@@ -68,11 +65,15 @@ function runTests({useWorker}: {useWorker: boolean}): void {
       await closeA();
       await closeB();
     });
-
     const connected = Promise.all([onPeerConnect(netA), onPeerConnect(netB)]);
-    await connect(netA, netB);
+    await connect(netA, netB, controller.signal);
     await connected;
 
+    controller.signal.addEventListener("abort", async () => {
+      await closeA();
+      await closeB();
+    });
+
     return [netA, netB, await getPeerIdOf(netA), await getPeerIdOf(netB)];
   }
 
@@ -242,7 +243,7 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     );
   });
 
-  it("trigger a TTFB_TIMEOUT error", async () => {
+  it("should trigger TTFB_TIMEOUT error if first response is delayed", async () => {
     const ttfbTimeoutMs = 250;
 
     const [netA, _, _0, peerIdB] = await createAndConnectPeers(
@@ -250,7 +251,7 @@ function runTests({useWorker}: {useWorker: boolean}): void {
         async function* onRequest() {
           if (method === ReqRespMethod.BeaconBlocksByRange) {
             // Wait for too long before sending first response chunk
-            await sleep(ttfbTimeoutMs * 10);
+            await sleep(ttfbTimeoutMs * 10, controller.signal);
             yield wrapBlockAsEncodedPayload(config, config.getForkTypes(0).SignedBeaconBlock.defaultValue());
           }
         },
@@ -263,8 +264,9 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     );
   });
 
-  it("trigger a RESP_TIMEOUT error", async () => {
-    const respTimeoutMs = 250;
+  it("should trigger a RESP_TIMEOUT error if first byte is on time but later delayed", async () => {
+    const ttfbTimeoutMs = 250;
+    const respTimeoutMs = 300;
 
     const [netA, _, _0, peerIdB] = await createAndConnectPeers(
       (method) =>
@@ -272,11 +274,11 @@ function runTests({useWorker}: {useWorker: boolean}): void {
           if (method === ReqRespMethod.BeaconBlocksByRange) {
             yield getEmptyEncodedPayloadSignedBeaconBlock(config);
             // Wait for too long before sending second response chunk
-            await sleep(respTimeoutMs * 5);
+            await sleep(respTimeoutMs * 5, controller.signal);
             yield getEmptyEncodedPayloadSignedBeaconBlock(config);
           }
         },
-      {respTimeoutMs}
+      {ttfbTimeoutMs, respTimeoutMs}
     );
 
     await expectRejectedWithLodestarError(
@@ -285,16 +287,19 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     );
   });
 
-  it("Sleep infinite on first byte", async () => {
+  it("should trigger TTFB_TIMEOUT error if respTimeoutMs and ttfbTimeoutMs is the same", async () => {
+    const ttfbTimeoutMs = 250;
+    const respTimeoutMs = 250;
+
     const [netA, _, _0, peerIdB] = await createAndConnectPeers(
       (method) =>
         // biome-ignore lint/correctness/useYield: No need for yield in test context
         async function* onRequest() {
           if (method === ReqRespMethod.BeaconBlocksByRange) {
-            await sleep(100000000);
+            await sleep(100000000, controller.signal);
           }
         },
-      {respTimeoutMs: 250, ttfbTimeoutMs: 250}
+      {respTimeoutMs, ttfbTimeoutMs}
     );
 
     await expectRejectedWithLodestarError(
@@ -303,13 +308,13 @@ function runTests({useWorker}: {useWorker: boolean}): void {
     );
   });
 
-  it("Sleep infinite on second response chunk", async () => {
+  it("should trigger a RESP_TIMEOUT error if first byte is on time but sleep infinite", async () => {
     const [netA, _, _0, peerIdB] = await createAndConnectPeers(
       (method) =>
         async function* onRequest() {
           if (method === ReqRespMethod.BeaconBlocksByRange) {
             yield getEmptyEncodedPayloadSignedBeaconBlock(config);
-            await sleep(100000000);
+            await sleep(100000000, controller.signal);
           }
         },
       {respTimeoutMs: 250, ttfbTimeoutMs: 250}

packages/beacon-node/test/utils/network.ts

@@ -3,6 +3,7 @@ import {generateKeyPair} from "@libp2p/crypto/keys";
 import {PrivateKey} from "@libp2p/interface";
 import {ATTESTATION_SUBNET_COUNT, SYNC_COMMITTEE_SUBNET_COUNT} from "@lodestar/params";
 import {SubnetID} from "@lodestar/types";
+import {sleep} from "@lodestar/utils";
 import {INetwork, Network, NetworkEvent} from "../../src/network/index.js";
 import {Libp2p} from "../../src/network/interface.js";
 import {createNodeJsLibp2p} from "../../src/network/libp2p/index.js";
@@ -35,9 +36,13 @@ type INetworkDebug = Pick<INetwork, "connectToPeer" | "disconnectPeer" | "getNet
 
 // Helpers to manipulate network's libp2p instance for testing only
 
-export async function connect(netDial: INetworkDebug, netServer: INetworkDebug): Promise<void> {
+export async function connect(netDial: INetworkDebug, netServer: INetworkDebug, signal?: AbortSignal): Promise<void> {
   const netServerId = await netServer.getNetworkIdentity();
   await netDial.connectToPeer(netServerId.peerId, netServerId.p2pAddresses);
+
+  // We see a lot of "Muxer already closed" in e2e tests on CI
+  // This is a way to give a grace period for connections to open and exchange metadata
+  await sleep(50, signal);
 }
 
 export async function disconnect(network: INetworkDebug, peer: string): Promise<void> {

packages/beacon-node/test/utils/networkWithMockDb.ts

@@ -1,6 +1,7 @@
 import {generateKeyPair} from "@libp2p/crypto/keys";
 import {ChainForkConfig, createBeaconConfig} from "@lodestar/config";
 import {ssz} from "@lodestar/types";
+import {sleep} from "@lodestar/utils";
 import {BeaconChain} from "../../src/chain/chain.js";
 import {Eth1ForBlockProductionDisabled} from "../../src/eth1/index.js";
 import {ExecutionEngineDisabled} from "../../src/execution/index.js";
@@ -89,15 +90,18 @@ export async function getNetworkForTest(
     privateKey: await generateKeyPair("secp256k1"),
     opts: {
       ...defaultNetworkOptions,
-      maxPeers: 1,
+      maxPeers: 10,
       targetPeers: 1,
       bootMultiaddrs: [],
-      localMultiaddrs: ["/ip4/127.0.0.1/tcp/0"],
+      localMultiaddrs: ["/ip4/0.0.0.0/tcp/0"],
       discv5FirstQueryDelayMs: 0,
       discv5: null,
       skipParamsLog: true,
       // Disable rate limiting
       rateLimitMultiplier: 0,
+      // Increase of following value is just to circumvent the following error in e2e tests
+      // > libp2p:mplex rate limit hit when receiving messages
+      disconnectThreshold: 255,
       ...opts.opts,
     },
     logger,
@@ -108,6 +112,14 @@ export async function getNetworkForTest(
     async function closeAll() {
       await network.close();
       await chain.close();
+
+      /**
+       * We choose random port for the libp2p network. Though our libp2p instance is closed the
+       * system still hold the port momentarily. And if next test randomly select the same port
+       * it failed with ERR_CONNECTION_REFUSED. To avoid such situation giving a grace period
+       * for the system to also cleanup resources.
+       */
+      await sleep(100);
     },
   ];
 }

packages/params/test/e2e/ensure-config-is-synced.test.ts

@@ -52,14 +52,19 @@ function assertCorrectPreset(localPreset: BeaconPreset, remotePreset: BeaconPres
 }
 
 async function downloadRemoteConfig(preset: "mainnet" | "minimal", commit: string): Promise<BeaconPreset> {
-  const downloadedParams = await Promise.all(
-    Object.values(ForkName).map((forkName) =>
-      axios({
-        url: `https://raw.githubusercontent.com/ethereum/consensus-specs/${commit}/presets/${preset}/${forkName}.yaml`,
-        timeout: 30 * 1000,
-      }).then((response) => loadConfigYaml(response.data))
-    )
-  );
+  const downloadedParams: Record<string, unknown>[] = [];
+
+  for (const forkName of Object.values(ForkName)) {
+    const response = await axios({
+      url: `https://raw.githubusercontent.com/ethereum/consensus-specs/${commit}/presets/${preset}/${forkName}.yaml`,
+      timeout: 30 * 1000,
+    });
+    downloadedParams.push(loadConfigYaml(response.data));
+
+    // We get error `Request failed with status code 429`
+    // which is `Too Many Request` so we added a bit delay between each request
+    await new Promise((resolve) => setTimeout(resolve, 200));
+  }
 
   // Merge all the fetched yamls for the different forks
   const beaconPresetRaw: Record<string, unknown> = Object.assign(