Type error in catch clause (with TS feature) (#3072)

* Bump typescript to 4.4.0 * Type catch e clause * Bump observable-fns * Type lodestar error * Skip readme checks
2026-01-09 01:28:11 -05:00 · 2021-09-09 21:44:57 +02:00
parent 6a0745e9db
commit d7a4379d93
58 changed files with 142 additions and 143 deletions
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -39,5 +39,7 @@ jobs:
        run: yarn coverage
      - name: E2e tests
        run: yarn test:e2e
-      - name: README check
-        run: yarn run check-readme
+      # Tool incompatible with current Typescript version
+      # See https://github.com/bbc/typescript-docs-verifier/issues/1
+      # - name: README check
+      #   run: yarn run check-readme
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
    "typedoc-plugin-external-module-name": "^4.0.3",
    "typedoc-plugin-internal-external": "^2.2.0",
    "typedoc-plugin-markdown": "^2.4.1",
-    "typescript": "^4.2.0",
+    "typescript": "^4.4.0",
    "typescript-docs-verifier": "^1.1.3"
  },
  "dependencies": {},
--- a/packages/api/src/client/utils/httpClient.ts
+++ b/packages/api/src/client/utils/httpClient.ts
@@ -93,7 +93,7 @@ export class HttpClient implements IHttpClient {

      return await getBody(res);
    } catch (e) {
-      if (isAbortedError(e)) {
+      if (isAbortedError(e as Error)) {
        if (signalGlobal?.aborted) {
          throw new ErrorAborted("REST client");
        } else if (controller.signal.aborted) {
--- a/packages/api/src/server/events.ts
+++ b/packages/api/src/server/events.ts
@@ -29,7 +29,7 @@ export function getRoutes(config: IChainForkConfig, api: Api): ServerRoutes<Api,
                const data = eventSerdes.toJson(event);
                res.raw.write(serializeSSEEvent({event: event.type, data}));
              } catch (e) {
-                reject(e);
+                reject(e as Error);
              }
            });

--- a/packages/api/test/unit/events.test.ts
+++ b/packages/api/test/unit/events.test.ts
@@ -69,7 +69,7 @@ describe("events", () => {
            await sleep(5);
          }
        } catch (e) {
-          reject(e);
+          reject(e as Error);
        }
      });

--- a/packages/beacon-state-transition/test/perf/analyzeBlocks.ts
+++ b/packages/beacon-state-transition/test/perf/analyzeBlocks.ts
@@ -81,7 +81,7 @@ async function run(): Promise<void> {
  }
 }

-run().catch((e) => {
+run().catch((e: Error) => {
  console.error(e);
  process.exit(1);
 });
--- a/packages/beacon-state-transition/test/perf/analyzeEpochs.ts
+++ b/packages/beacon-state-transition/test/perf/analyzeEpochs.ts
@@ -175,7 +175,7 @@ const fromEpoch = process.env.FROM_EPOCH !== undefined ? parseInt(process.env.FR
 const network = process.env.NETWORK;
 if (!network) throw Error("Must define process.env.NETWORK");

-analyzeEpochs(network, fromEpoch).catch((e) => {
+analyzeEpochs(network, fromEpoch).catch((e: Error) => {
  // eslint-disable-next-line no-console
  console.error(e);
  process.exit(1);
--- a/packages/beacon-state-transition/test/setup.ts
+++ b/packages/beacon-state-transition/test/setup.ts
@@ -2,7 +2,7 @@ import {init} from "@chainsafe/bls";

 // blst-native initialization is syncronous
 // Initialize bls here instead of in before() so it's available inside describe() blocks
-init("blst-native").catch((e) => {
+init("blst-native").catch((e: Error) => {
  // eslint-disable-next-line no-console
  console.error(e);
  process.exit(1);
--- a/packages/cli/src/cmds/account/cmds/validator/voluntaryExit.ts
+++ b/packages/cli/src/cmds/account/cmds/validator/voluntaryExit.ts
@@ -90,13 +90,7 @@ BE UNTIL AT LEAST TWO YEARS AFTER THE PHASE 0 MAINNET LAUNCH.

    console.log(`Initiating voluntary exit for validator ${publicKey}`);

-    let secretKey;
-
-    try {
-      secretKey = await validatorDirManager.decryptValidator(publicKey, {force});
-    } catch (error) {
-      throw new YargsError(error);
-    }
+    const secretKey = await validatorDirManager.decryptValidator(publicKey, {force});
    if (!secretKey) throw new YargsError("No validator keystores found");
    console.log(`Decrypted keystore for validator ${publicKey}`);

@@ -111,10 +105,6 @@ BE UNTIL AT LEAST TWO YEARS AFTER THE PHASE 0 MAINNET LAUNCH.
      graffiti: args.graffiti,
    });

-    try {
-      await validatorClient.voluntaryExit(publicKey, args.exitEpoch);
-    } catch (error) {
-      throw new Error(error);
-    }
+    await validatorClient.voluntaryExit(publicKey, args.exitEpoch);
  },
 };
--- a/packages/cli/src/util/graffiti.ts
+++ b/packages/cli/src/util/graffiti.ts
@@ -12,7 +12,7 @@ export function getDefaultGraffiti(): string {
    return `${lodestarPackageName}-${version}`;
  } catch (e) {
    // eslint-disable-next-line no-console
-    console.error("Error guessing lodestar version", e);
+    console.error("Error guessing lodestar version", e as Error);
    return lodestarPackageName;
  }
 }
--- a/packages/light-client/src/utils/clock.ts
+++ b/packages/light-client/src/utils/clock.ts
@@ -28,7 +28,7 @@ export class Clock implements IClock {

  start(signal: AbortSignal): void {
    for (const fn of this.fns) {
-      this.runAtMostEvery(signal, fn).catch((e) => {
+      this.runAtMostEvery(signal, fn).catch((e: Error) => {
        if (this.onError) this.onError(e);
      });
    }
--- a/packages/light-client/test/setup.ts
+++ b/packages/light-client/test/setup.ts
@@ -2,7 +2,7 @@ import {init} from "@chainsafe/bls";

 // blst-native initialization is syncronous
 // Initialize bls here instead of in before() so it's available inside describe() blocks
-init("blst-native").catch((e) => {
+init("blst-native").catch((e: Error) => {
  // eslint-disable-next-line no-console
  console.error(e);
  process.exit(1);
--- a/packages/light-client/test/sim/altairChainSimulator.ts
+++ b/packages/light-client/test/sim/altairChainSimulator.ts
@@ -71,7 +71,7 @@ async function runAltairChainSimulator(): Promise<void> {
  }
 }

-runAltairChainSimulator().catch((e) => {
+runAltairChainSimulator().catch((e: Error) => {
  console.error(e);
  process.exit(1);
 });
--- a/packages/lodestar/package.json
+++ b/packages/lodestar/package.json
@@ -87,7 +87,7 @@
    "snappyjs": "^0.6.0",
    "stream-to-it": "^0.2.0",
    "strict-event-emitter-types": "^2.0.0",
-    "threads": "^1.6.3",
+    "threads": "^1.6.5",
    "varint": "^5.0.0",
    "wtfnode": "^0.8.4"
  },
--- a/packages/lodestar/src/api/impl/beacon/pool/index.ts
+++ b/packages/lodestar/src/api/impl/beacon/pool/index.ts
@@ -60,11 +60,11 @@ export function getBeaconPoolApi({
              chain.attestationPool.add(attestation),
            ]);
          } catch (e) {
-            errors.push(e);
+            errors.push(e as Error);
            logger.error(
              `Error on submitPoolAttestations [${i}]`,
              {slot: attestation.data.slot, index: attestation.data.index},
-              e
+              e as Error
            );
            if (e instanceof AttestationError && e.action === GossipAction.REJECT) {
              const archivedPath = chain.persistInvalidSszObject(
@@ -148,11 +148,11 @@ export function getBeaconPoolApi({
              })
            );
          } catch (e) {
-            errors.push(e);
+            errors.push(e as Error);
            logger.error(
              `Error on submitPoolSyncCommitteeSignatures [${i}]`,
              {slot: signature.slot, validatorIndex: signature.validatorIndex},
-              e
+              e as Error
            );
            if (e instanceof SyncCommitteeError && e.action === GossipAction.REJECT) {
              const archivedPath = chain.persistInvalidSszObject(
--- a/packages/lodestar/src/api/impl/validator/index.ts
+++ b/packages/lodestar/src/api/impl/validator/index.ts
@@ -369,14 +369,14 @@ export function getValidatorApi({
              return; // Ok to submit the same aggregate twice
            }

-            errors.push(e);
+            errors.push(e as Error);
            logger.error(
              `Error on publishAggregateAndProofs [${i}]`,
              {
                slot: signedAggregateAndProof.message.aggregate.data.slot,
                index: signedAggregateAndProof.message.aggregate.data.index,
              },
-              e
+              e as Error
            );
            if (e instanceof AttestationError && e.action === GossipAction.REJECT) {
              const archivedPath = chain.persistInvalidSszObject(
@@ -417,14 +417,14 @@ export function getValidatorApi({
            chain.syncContributionAndProofPool.add(contributionAndProof.message);
            await network.gossip.publishContributionAndProof(contributionAndProof);
          } catch (e) {
-            errors.push(e);
+            errors.push(e as Error);
            logger.error(
              `Error on publishContributionAndProofs [${i}]`,
              {
                slot: contributionAndProof.message.contribution.slot,
                subCommitteeIndex: contributionAndProof.message.contribution.subCommitteeIndex,
              },
-              e
+              e as Error
            );
            if (e instanceof SyncCommitteeError && e.action === GossipAction.REJECT) {
              const archivedPath = chain.persistInvalidSszObject(
--- a/packages/lodestar/src/api/rest/index.ts
+++ b/packages/lodestar/src/api/rest/index.ts
@@ -117,7 +117,7 @@ export class RestApi {
      const address = await this.server.listen(this.opts.port, this.opts.host);
      this.logger.info("Started REST api server", {address, namespaces: this.opts.api});
    } catch (e) {
-      this.logger.error("Error starting REST api server", {host: this.opts.host, port: this.opts.port}, e);
+      this.logger.error("Error starting REST api server", {host: this.opts.host, port: this.opts.port}, e as Error);
      throw e;
    }
  }
--- a/packages/lodestar/src/chain/archiver/index.ts
+++ b/packages/lodestar/src/chain/archiver/index.ts
@@ -82,7 +82,7 @@ export class Archiver {
      this.chain.forkChoice.prune(finalized.root);
      this.logger.verbose("Finish processing finalized checkpoint", {epoch: finalizedEpoch});
    } catch (e) {
-      this.logger.error("Error processing finalized checkpoint", {epoch: finalized.epoch}, e);
+      this.logger.error("Error processing finalized checkpoint", {epoch: finalized.epoch}, e as Error);
    }
  };
 }
--- a/packages/lodestar/src/chain/blocks/processor.ts
+++ b/packages/lodestar/src/chain/blocks/processor.ts
@@ -66,7 +66,12 @@ export async function processBlockJob(modules: BlockProcessorModules, job: IBloc
    await processBlock(modules, job);
  } catch (e) {
    // above functions only throw BlockError
-    modules.emitter.emit(ChainEvent.errorBlock, e);
+    if (e instanceof BlockError) {
+      modules.emitter.emit(ChainEvent.errorBlock, e);
+    } else {
+      // TODO: Hanlde non-BlockError(s)
+      modules.emitter.emit(ChainEvent.errorBlock, e as BlockError);
+    }
  }
 }

@@ -140,8 +145,9 @@ export async function processChainSegmentJob(modules: BlockProcessorModules, job
        // error.
        default:
          throw new ChainSegmentError({
-            job: e.job,
-            ...e.type,
+            // TODO: Stop using jobs in errors
+            job: (e as ChainSegmentError).job,
+            ...(e as BlockError).type,
            importedBlocks: 0,
          });
      }
--- a/packages/lodestar/src/chain/bls/multithread/index.ts
+++ b/packages/lodestar/src/chain/bls/multithread/index.ts
@@ -328,10 +328,10 @@ export class BlsMultiThreadWorkerPool implements IBlsVerifier {
      if (batchSigsSuccess > 0) this.metrics?.blsThreadPool.batchSigsSuccess.inc(batchSigsSuccess);
    } catch (e) {
      // Worker communications should never reject
-      if (!this.signal.aborted) this.logger.error("BlsMultiThreadWorkerPool error", {}, e);
+      if (!this.signal.aborted) this.logger.error("BlsMultiThreadWorkerPool error", {}, e as Error);
      // Reject all
      for (const job of jobs) {
-        job.reject(e);
+        job.reject(e as Error);
      }
    }

@@ -379,7 +379,7 @@ export class BlsMultiThreadWorkerPool implements IBlsVerifier {
    for (const [id, worker] of this.workers.entries()) {
      // NOTE: 'threads' has not yet updated types, and NodeJS complains with
      // [DEP0132] DeprecationWarning: Passing a callback to worker.terminate() is deprecated. It returns a Promise instead.
-      ((worker.worker.terminate() as unknown) as Promise<void>).catch((e) => {
+      ((worker.worker.terminate() as unknown) as Promise<void>).catch((e: Error) => {
        if (e) this.logger.error("Error terminating worker", {id}, e);
      });
    }
--- a/packages/lodestar/src/chain/eventHandlers.ts
+++ b/packages/lodestar/src/chain/eventHandlers.ts
@@ -34,7 +34,7 @@ function wrapHandler<
      await handler(...args);
      emitter.emit(event, ...((args as unknown) as ListenerType<Callback>));
    } catch (e) {
-      logger.error("Error handling event", {event}, e);
+      logger.error("Error handling event", {event}, e as Error);
    }
  };
 }
@@ -197,12 +197,12 @@ export async function onForkChoiceFinalized(this: BeaconChain, cp: phase0.Checkp
        state as TreeBacked<altair.BeaconState>
      );
    } catch (e) {
-      this.logger.error("Error lightclientUpdater.onFinalized", {epoch: cp.epoch}, e);
+      this.logger.error("Error lightclientUpdater.onFinalized", {epoch: cp.epoch}, e as Error);
    }
    try {
      await this.lightClientIniter.onFinalized(cp);
    } catch (e) {
-      this.logger.error("Error LightClientIniter.onFinalized", {epoch: cp.epoch}, e);
+      this.logger.error("Error LightClientIniter.onFinalized", {epoch: cp.epoch}, e as Error);
    }
  }
 }
@@ -259,7 +259,7 @@ export async function onBlock(

        this.metrics?.registerAttestationInBlock(indexedAttestation, block.message);
      } catch (e) {
-        this.logger.error("Error processing attestation from block", {slot: block.message.slot}, e);
+        this.logger.error("Error processing attestation from block", {slot: block.message.slot}, e as Error);
      }
    }
  }
@@ -293,7 +293,7 @@ export async function onBlock(
        postState as TreeBacked<altair.BeaconState>
      );
    } catch (e) {
-      this.logger.error("Error lightclientUpdater.onHead", {slot: block.message.slot}, e);
+      this.logger.error("Error lightclientUpdater.onHead", {slot: block.message.slot}, e as Error);
    }
  }
 }
--- a/packages/lodestar/src/chain/validation/aggregateAndProof.ts
+++ b/packages/lodestar/src/chain/validation/aggregateAndProof.ts
@@ -63,7 +63,7 @@ export async function validateGossipAggregateAndProof(

  const targetState = await chain.regen
    .getCheckpointState(attTarget, RegenCaller.validateGossipAggregateAndProof)
-    .catch((e) => {
+    .catch((e: Error) => {
      throw new AttestationError(GossipAction.REJECT, {
        code: AttestationErrorCode.MISSING_ATTESTATION_TARGET_STATE,
        error: e as Error,
--- a/packages/lodestar/src/chain/validation/attestation.ts
+++ b/packages/lodestar/src/chain/validation/attestation.ts
@@ -87,7 +87,7 @@ export async function validateGossipAttestation(

  const attestationTargetState = await chain.regen
    .getCheckpointState(attTarget, RegenCaller.validateGossipAttestation)
-    .catch((e) => {
+    .catch((e: Error) => {
      throw new AttestationError(GossipAction.REJECT, {
        code: AttestationErrorCode.MISSING_ATTESTATION_TARGET_STATE,
        error: e as Error,
--- a/packages/lodestar/src/eth1/eth1ForBlockProduction.ts
+++ b/packages/lodestar/src/eth1/eth1ForBlockProduction.ts
@@ -63,7 +63,7 @@ export class Eth1ForBlockProduction implements IEth1ForBlockProduction {
      this.logger.warn("No depositContractDeployBlock provided");
    }

-    this.runAutoUpdate().catch((e) => {
+    this.runAutoUpdate().catch((e: Error) => {
      if (!(e instanceof ErrorAborted)) {
        this.logger.error("Error on eth1 loop", {}, e);
      }
@@ -133,7 +133,7 @@ export class Eth1ForBlockProduction implements IEth1ForBlockProduction {
          this.logger.debug("Eth1 provider rate limited", {}, e);
          await sleep(RATE_LIMITED_WAIT_MS, this.signal);
        } else {
-          this.logger.error("Error updating eth1 chain cache", {}, e);
+          this.logger.error("Error updating eth1 chain cache", {}, e as Error);
          await sleep(MIN_WAIT_ON_ERORR_MS, this.signal);
        }
      }
--- a/packages/lodestar/src/eth1/provider/jsonRpcHttpClient.ts
+++ b/packages/lodestar/src/eth1/provider/jsonRpcHttpClient.ts
@@ -74,7 +74,7 @@ export class JsonRpcHttpClient {
      try {
        return await this.fetchJsonOneUrl(url, json, opts);
      } catch (e) {
-        if (this.opts.shouldNotFallback?.(e)) {
+        if (this.opts.shouldNotFallback?.(e as Error)) {
          throw e;
        }

@@ -148,7 +148,7 @@ function parseJson<T>(json: string): T {
  try {
    return JSON.parse(json) as T;
  } catch (e) {
-    throw new ErrorParseJson(json, e);
+    throw new ErrorParseJson(json, e as Error);
  }
 }

--- a/packages/lodestar/src/metrics/server/http.ts
+++ b/packages/lodestar/src/metrics/server/http.ts
@@ -43,7 +43,7 @@ export class HttpMetricsServer implements IMetricsServer {
    try {
      await this.terminator.terminate();
    } catch (e) {
-      this.logger.warn("Failed to stop metrics server", e);
+      this.logger.warn("Failed to stop metrics server", {}, e as Error);
    }
  }

--- a/packages/lodestar/src/network/gossip/handlers/index.ts
+++ b/packages/lodestar/src/network/gossip/handlers/index.ts
@@ -83,7 +83,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers
        try {
          chain.receiveBlock(signedBlock);
        } catch (e) {
-          logger.error("Error receiving block", {}, e);
+          logger.error("Error receiving block", {}, e as Error);
        }
      } catch (e) {
        if (
@@ -183,7 +183,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers
      try {
        chain.attestationPool.add(attestation);
      } catch (e) {
-        logger.error("Error adding attestation to pool", {subnet}, e);
+        logger.error("Error adding attestation to pool", {subnet}, e as Error);
      }
    },

@@ -192,7 +192,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers

      // Handler

-      db.voluntaryExit.add(voluntaryExit).catch((e) => {
+      db.voluntaryExit.add(voluntaryExit).catch((e: Error) => {
        logger.error("Error adding attesterSlashing to pool", {}, e);
      });
    },
@@ -202,7 +202,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers

      // Handler

-      db.proposerSlashing.add(proposerSlashing).catch((e) => {
+      db.proposerSlashing.add(proposerSlashing).catch((e: Error) => {
        logger.error("Error adding attesterSlashing to pool", {}, e);
      });
    },
@@ -212,7 +212,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers

      // Handler

-      db.attesterSlashing.add(attesterSlashing).catch((e) => {
+      db.attesterSlashing.add(attesterSlashing).catch((e: Error) => {
        logger.error("Error adding attesterSlashing to pool", {}, e);
      });
    },
@@ -237,7 +237,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers
      try {
        chain.syncContributionAndProofPool.add(contributionAndProof.message);
      } catch (e) {
-        logger.error("Error adding to contributionAndProof pool", {}, e);
+        logger.error("Error adding to contributionAndProof pool", {}, e as Error);
      }
    },

@@ -262,7 +262,7 @@ export function getGossipHandlers(modules: ValidatorFnsModules): GossipHandlers
      try {
        chain.syncCommitteeMessagePool.add(subnet, syncCommittee, indexInSubCommittee);
      } catch (e) {
-        logger.error("Error adding to syncCommittee pool", {subnet}, e);
+        logger.error("Error adding to syncCommittee pool", {subnet}, e as Error);
      }
    },
  };
--- a/packages/lodestar/src/network/gossip/validation/index.ts
+++ b/packages/lodestar/src/network/gossip/validation/index.ts
@@ -96,7 +96,7 @@ function getGossipValidatorFn<K extends GossipType>(
      metrics?.gossipValidationAccept.inc({topic: type}, 1);
    } catch (e) {
      if (!(e instanceof GossipActionError)) {
-        logger.error(`Gossip validation ${type} threw a non-GossipActionError`, {}, e);
+        logger.error(`Gossip validation ${type} threw a non-GossipActionError`, {}, e as Error);
        throw new GossipValidationError(ERR_TOPIC_VALIDATOR_IGNORE, (e as Error).message);
      }

--- a/packages/lodestar/src/network/network.ts
+++ b/packages/lodestar/src/network/network.ts
@@ -274,7 +274,7 @@ export class Network implements INetwork {
        }
      }
    } catch (e) {
-      this.logger.error("Error on BeaconGossipHandler.onEpoch", {epoch}, e);
+      this.logger.error("Error on BeaconGossipHandler.onEpoch", {epoch}, e as Error);
    }
  };

--- a/packages/lodestar/src/network/peers/discover.ts
+++ b/packages/lodestar/src/network/peers/discover.ts
@@ -124,7 +124,7 @@ export class PeerDiscovery {
          }
        }
      } catch (e) {
-        this.logger.debug("Error deserializing ENR", {nodeId: enr.nodeId}, e);
+        this.logger.debug("Error deserializing ENR", {nodeId: enr.nodeId}, e as Error);
      }
    }

@@ -164,7 +164,7 @@ export class PeerDiscovery {

      // Note: `libp2p.dial()` is what libp2p.connectionManager autoDial calls
      // Note: You must listen to the connected events to listen for a successful conn upgrade
-      this.libp2p.dial(peer).catch((e) => {
+      this.libp2p.dial(peer).catch((e: Error) => {
        this.logger.debug("Error dialing discovered peer", {peer: prettyPrintPeerId(peer)}, e);
      });
    }
--- a/packages/lodestar/src/network/peers/peerManager.ts
+++ b/packages/lodestar/src/network/peers/peerManager.ts
@@ -185,7 +185,7 @@ export class PeerManager {
          return this.onStatus(peer, request.body);
      }
    } catch (e) {
-      this.logger.error("Error onRequest handler", {}, e);
+      this.logger.error("Error onRequest handler", {}, e as Error);
    }
  };

@@ -238,7 +238,7 @@ export class PeerManager {
      if (e instanceof IrrelevantPeerError) {
        this.logger.debug("Irrelevant peer", {peer: prettyPrintPeerId(peer), reason: e.getMetadata()});
      } else {
-        this.logger.error("Unexpected error in assertPeerRelevance", {peer: prettyPrintPeerId(peer)}, e);
+        this.logger.error("Unexpected error in assertPeerRelevance", {peer: prettyPrintPeerId(peer)}, e as Error);
      }

      void this.goodbyeAndDisconnect(peer, GoodByeReasonCode.IRRELEVANT_NETWORK);
@@ -282,7 +282,7 @@ export class PeerManager {
      const localStatus = this.chain.getStatus();
      await Promise.all(peers.map(async (peer) => this.requestStatus(peer, localStatus)));
    } catch (e) {
-      this.logger.verbose("Error requesting new status to peers", {}, e);
+      this.logger.verbose("Error requesting new status to peers", {}, e as Error);
    }
  }

@@ -324,7 +324,7 @@ export class PeerManager {

    if (discv5Queries.length > 0 && !this.opts.disablePeerDiscovery) {
      // It's a promise due to crypto lib calls only
-      this.discovery.discoverSubnetPeers(discv5Queries).catch((e) => {
+      this.discovery.discoverSubnetPeers(discv5Queries).catch((e: Error) => {
        this.logger.error("Error on discoverSubnetPeers", {}, e);
      });
    }
@@ -333,7 +333,7 @@ export class PeerManager {
      try {
        this.discovery.discoverPeers(peersToConnect);
      } catch (e) {
-        this.logger.error("Error on discoverPeers", {}, e);
+        this.logger.error("Error on discoverPeers", {}, e as Error);
      }
    }

@@ -419,7 +419,7 @@ export class PeerManager {
    try {
      await this.libp2p.hangUp(peer);
    } catch (e) {
-      this.logger.warn("Unclean disconnect", {peer: prettyPrintPeerId(peer)}, e);
+      this.logger.warn("Unclean disconnect", {peer: prettyPrintPeerId(peer)}, e as Error);
    }
  }

@@ -428,7 +428,7 @@ export class PeerManager {
      this.metrics?.peerGoodbyeSent.inc({reason: GOODBYE_KNOWN_CODES[goodbye.toString()] || ""});
      await this.reqResp.goodbye(peer, BigInt(goodbye));
    } catch (e) {
-      this.logger.verbose("Failed to send goodbye", {peer: prettyPrintPeerId(peer)}, e);
+      this.logger.verbose("Failed to send goodbye", {peer: prettyPrintPeerId(peer)}, e as Error);
    } finally {
      void this.disconnect(peer);
    }
--- a/packages/lodestar/src/network/reqresp/request/index.ts
+++ b/packages/lodestar/src/network/reqresp/request/index.ts
@@ -97,7 +97,7 @@ export async function sendRequest<T extends ResponseBody | ResponseBody[]>(
      },
      DIAL_TIMEOUT,
      signal
-    ).catch((e) => {
+    ).catch((e: Error) => {
      if (e instanceof TimeoutError) {
        throw new RequestInternalError({code: RequestErrorCode.DIAL_TIMEOUT});
      } else {
@@ -141,7 +141,7 @@ export async function sendRequest<T extends ResponseBody | ResponseBody[]>(
            collectResponses(method, maxResponses)
          ),
        maxTotalResponseTimeout(maxResponses, options)
-      ).catch((e) => {
+      ).catch((e: Error) => {
        // No need to close the stream here, the outter finally {} block will
        if (e instanceof TimeoutError) {
          throw new RequestInternalError({code: RequestErrorCode.RESPONSE_TIMEOUT});
--- a/packages/lodestar/src/network/subnets/attnetsService.ts
+++ b/packages/lodestar/src/network/subnets/attnetsService.ts
@@ -140,7 +140,7 @@ export class AttnetsService implements IAttnetsService {
    try {
      this.unsubscribeExpiredCommitteeSubnets(slot);
    } catch (e) {
-      this.logger.error("Error on AttnetsService.onSlot", {slot}, e);
+      this.logger.error("Error on AttnetsService.onSlot", {slot}, e as Error);
    }
  };

@@ -153,7 +153,7 @@ export class AttnetsService implements IAttnetsService {
      this.unsubscribeExpiredRandomSubnets(slot);
      this.pruneExpiredKnownValidators(slot);
    } catch (e) {
-      this.logger.error("Error on AttnetsService.onEpoch", {epoch}, e);
+      this.logger.error("Error on AttnetsService.onEpoch", {epoch}, e as Error);
    }
  };

--- a/packages/lodestar/src/network/subnets/syncnetsService.ts
+++ b/packages/lodestar/src/network/subnets/syncnetsService.ts
@@ -98,7 +98,7 @@ export class SyncnetsService implements ISubnetsService {
      // Unsubscribe to a committee subnet from subscriptionsCommittee.
      this.unsubscribeSubnets(this.subscriptionsCommittee.getExpired(slot));
    } catch (e) {
-      this.logger.error("Error on SyncnetsService.onEpoch", {epoch}, e);
+      this.logger.error("Error on SyncnetsService.onEpoch", {epoch}, e as Error);
    }
  };

--- a/packages/lodestar/src/node/notifier.ts
+++ b/packages/lodestar/src/node/notifier.ts
@@ -104,7 +104,7 @@ export async function runNodeNotifier({
    if (e instanceof ErrorAborted) {
      return; // Ok
    } else {
-      logger.error("Node notifier error", {}, e);
+      logger.error("Node notifier error", {}, e as Error);
    }
  }
 }
--- a/packages/lodestar/src/sync/range/chain.ts
+++ b/packages/lodestar/src/sync/range/chain.ts
@@ -269,7 +269,7 @@ export class SyncChain {
      }

      this.status = SyncChainStatus.Error;
-      this.logger.verbose("SyncChain Error", {id: this.logId}, e);
+      this.logger.verbose("SyncChain Error", {id: this.logId}, e as Error);

      // A batch could not be processed after max retry limit. It's likely that all peers
      // in this chain are sending invalid batches repeatedly so are either malicious or faulty.
@@ -303,7 +303,7 @@ export class SyncChain {
      this.requestBatches(this.peerset.keys());
    } catch (e) {
      // bubble the error up to the main async iterable loop
-      this.batchProcessor.end(e);
+      this.batchProcessor.end(e as Error);
    }
  }

@@ -397,7 +397,7 @@ export class SyncChain {
      this.triggerBatchDownloader();
    } catch (e) {
      // bubble the error up to the main async iterable loop
-      this.batchProcessor.end(e);
+      this.batchProcessor.end(e as Error);
    }

    // Pre-emptively request more blocks from peers whilst we process current blocks
--- a/packages/lodestar/src/sync/sync.ts
+++ b/packages/lodestar/src/sync/sync.ts
@@ -215,7 +215,7 @@ export class BeaconSync implements IBeaconSync {
      this.chain.receiveBlock(block);
      this.logger.verbose("Found UnknownBlockRoot", {parentRootHex});
    } catch (e) {
-      this.logger.verbose("Error fetching UnknownBlockRoot", {parentRootHex}, e);
+      this.logger.verbose("Error fetching UnknownBlockRoot", {parentRootHex}, e as Error);
    } finally {
      this.processingRoots.delete(parentRootHex);
    }
--- a/packages/lodestar/src/sync/utils/unknownRoot.ts
+++ b/packages/lodestar/src/sync/utils/unknownRoot.ts
@@ -19,7 +19,7 @@ export async function fetchUnknownBlockRoot(
        return blocks[0];
      }
    } catch (e) {
-      logger.debug("Error fetching UnknownBlockRoot", {i, parentRootHex}, e);
+      logger.debug("Error fetching UnknownBlockRoot", {i, parentRootHex}, e as Error);
    }
  }

--- a/packages/lodestar/src/util/queue/itemQueue.ts
+++ b/packages/lodestar/src/util/queue/itemQueue.ts
@@ -93,7 +93,7 @@ export class JobItemQueue<Args extends any[], R> {
        await sleep(0);
      }
    } catch (e) {
-      job.reject(e);
+      job.reject(e as Error);
    }

    this.runningJobs = Math.max(0, this.runningJobs - 1);
--- a/packages/lodestar/test/e2e/eth1/jsonRpcHttpClient.test.ts
+++ b/packages/lodestar/test/e2e/eth1/jsonRpcHttpClient.test.ts
@@ -104,7 +104,7 @@ describe("eth1 / jsonRpcHttpClient", function () {
    while (afterHooks.length) {
      const afterHook = afterHooks.pop();
      if (afterHook)
-        await afterHook().catch((e) => {
+        await afterHook().catch((e: Error) => {
          // eslint-disable-next-line no-console
          console.error("Error in afterEach hook", e);
        });
--- a/packages/lodestar/test/e2e/network/gossipsub.test.ts
+++ b/packages/lodestar/test/e2e/network/gossipsub.test.ts
@@ -153,7 +153,7 @@ describe("network", function () {
    for (let i = 0; i < msgCount; i++) {
      const voluntaryExit = ssz.phase0.SignedVoluntaryExit.defaultValue();
      voluntaryExit.message.epoch = i;
-      netA.gossip.publishVoluntaryExit(voluntaryExit).catch((e) => {
+      netA.gossip.publishVoluntaryExit(voluntaryExit).catch((e: Error) => {
        logger.error("Error on publishVoluntaryExit", {}, e);
      });
    }
--- a/packages/lodestar/test/setupBLS.ts
+++ b/packages/lodestar/test/setupBLS.ts
@@ -7,7 +7,7 @@ if (process.env.LODESTAR_PRESET === undefined) {

 // blst-native initialization is syncronous
 // Initialize bls here instead of in before() so it's available inside describe() blocks
-init("blst-native").catch((e) => {
+init("blst-native").catch((e: Error) => {
  // eslint-disable-next-line no-console
  console.error(e);
  process.exit(1);
--- a/packages/lodestar/test/sim/threaded/noEth1SimWorker.ts
+++ b/packages/lodestar/test/sim/threaded/noEth1SimWorker.ts
@@ -100,7 +100,7 @@ async function runWorker(): Promise<void> {
  await Promise.all(validators.map((validator) => validator.start()));
 }

-runWorker().catch((e) => {
+runWorker().catch((e: Error) => {
  console.error("Worker error", e);
  process.exit(1);
 });
--- a/packages/lodestar/test/utils/errors.ts
+++ b/packages/lodestar/test/utils/errors.ts
@@ -8,7 +8,7 @@ export function expectThrowsLodestarError(fn: () => void, expectedErr: LodestarE
    const json = JSON.stringify(value, null, 2);
    throw Error(`Expected fn to throw but returned value: \n\n\t${json}`);
  } catch (e) {
-    expectLodestarError(e, expectedErr);
+    expectLodestarError(e as LodestarError<any>, expectedErr);
  }
 }

@@ -22,9 +22,9 @@ export async function expectRejectedWithLodestarError(
    throw Error(`Expected promise to reject but returned value: \n\n\t${json}`);
  } catch (e) {
    if (typeof expectedErr === "string") {
-      expectLodestarErrorCode(e, expectedErr);
+      expectLodestarErrorCode(e as LodestarError<any>, expectedErr);
    } else {
-      expectLodestarError(e, expectedErr);
+      expectLodestarError(e as LodestarError<any>, expectedErr);
    }
  }
 }
--- a/packages/spec-test-runner/test/downloadTests.ts
+++ b/packages/spec-test-runner/test/downloadTests.ts
@@ -10,7 +10,7 @@ downloadTests(
    specTestsRepoUrl: SPEC_TEST_REPO_URL,
  },
  console.log
-).catch((e) => {
+).catch((e: Error) => {
  console.error(e);
  process.exit(1);
 });
--- a/packages/spec-test-runner/test/mocha-hooks.ts
+++ b/packages/spec-test-runner/test/mocha-hooks.ts
@@ -5,6 +5,6 @@ export const mochaHooks: RootHookObject = {
  beforeAll: (done) => {
    init("blst-native")
      .then(() => done())
-      .catch((e) => done(e));
+      .catch((e: Error) => done(e));
  },
 };
--- a/packages/spec-test-util/src/downloadTestsCli.ts
+++ b/packages/spec-test-util/src/downloadTestsCli.ts
@@ -32,7 +32,7 @@ async function downloadTestsCli(): Promise<void> {
  await downloadTests({specVersion, outputDir, testsToDownload}, console.log);
 }

-downloadTestsCli().catch((e) => {
+downloadTestsCli().catch((e: Error) => {
  console.error(e);
  process.exit(1);
 });
--- a/packages/validator/src/services/attestation.ts
+++ b/packages/validator/src/services/attestation.ts
@@ -40,7 +40,7 @@ export class AttestationService {
    await Promise.all(
      Array.from(dutiesByCommitteeIndex.entries()).map(async ([committeeIndex, duties]) => {
        if (duties.length === 0) return;
-        await this.publishAttestationsAndAggregates(slot, committeeIndex, duties, signal).catch((e) => {
+        await this.publishAttestationsAndAggregates(slot, committeeIndex, duties, signal).catch((e: Error) => {
          this.logger.error("Error on attestations routine", {slot, committeeIndex}, e);
        });
      })
@@ -83,7 +83,7 @@ export class AttestationService {
    const logCtx = {slot, index: committeeIndex};

    // Produce one attestation data per slot and committeeIndex
-    const attestationRes = await this.api.validator.produceAttestationData(committeeIndex, slot).catch((e) => {
+    const attestationRes = await this.api.validator.produceAttestationData(committeeIndex, slot).catch((e: Error) => {
      throw extendError(e, "Error producing attestation");
    });
    const attestation = attestationRes.data;
@@ -101,7 +101,7 @@ export class AttestationService {
        signedAttestations.push(await this.validatorStore.signAttestation(duty, attestation, currentEpoch));
        this.logger.debug("Signed attestation", logCtxValidator);
      } catch (e) {
-        this.logger.error("Error signing attestation", logCtxValidator, e);
+        this.logger.error("Error signing attestation", logCtxValidator, e as Error);
      }
    }

@@ -110,7 +110,7 @@ export class AttestationService {
        await this.api.beacon.submitPoolAttestations(signedAttestations);
        this.logger.info("Published attestations", {...logCtx, count: signedAttestations.length});
      } catch (e) {
-        this.logger.error("Error publishing attestations", logCtx, e);
+        this.logger.error("Error publishing attestations", logCtx, e as Error);
      }
    }

@@ -141,7 +141,7 @@ export class AttestationService {
    this.logger.verbose("Aggregating attestations", logCtx);
    const aggregate = await this.api.validator
      .getAggregatedAttestation(ssz.phase0.AttestationData.hashTreeRoot(attestation), attestation.slot)
-      .catch((e) => {
+      .catch((e: Error) => {
        throw extendError(e, "Error producing aggregateAndProofs");
      });

@@ -158,7 +158,7 @@ export class AttestationService {
          this.logger.debug("Signed aggregateAndProofs", logCtxValidator);
        }
      } catch (e) {
-        this.logger.error("Error signing aggregateAndProofs", logCtxValidator, e);
+        this.logger.error("Error signing aggregateAndProofs", logCtxValidator, e as Error);
      }
    }

@@ -167,7 +167,7 @@ export class AttestationService {
        await this.api.validator.publishAggregateAndProofs(signedAggregateAndProofs);
        this.logger.info("Published aggregateAndProofs", {...logCtx, count: signedAggregateAndProofs.length});
      } catch (e) {
-        this.logger.error("Error publishing aggregateAndProofs", logCtx, e);
+        this.logger.error("Error publishing aggregateAndProofs", logCtx, e as Error);
      }
    }
  }
--- a/packages/validator/src/services/attestationDuties.ts
+++ b/packages/validator/src/services/attestationDuties.ts
@@ -53,7 +53,7 @@ export class AttestationDutiesService {
  private runDutiesTasks = async (epoch: Epoch): Promise<void> => {
    await Promise.all([
      // Run pollBeaconAttesters immediately for all known local indices
-      this.pollBeaconAttesters(epoch, this.indicesService.getAllLocalIndices()).catch((e) => {
+      this.pollBeaconAttesters(epoch, this.indicesService.getAllLocalIndices()).catch((e: Error) => {
        this.logger.error("Error on poll attesters", {epoch}, e);
      }),

@@ -61,7 +61,7 @@ export class AttestationDutiesService {
      this.indicesService
        .pollValidatorIndices()
        .then((newIndices) => this.pollBeaconAttesters(epoch, newIndices))
-        .catch((e) => {
+        .catch((e: Error) => {
          this.logger.error("Error on poll indices and attesters", {epoch}, e);
        }),
    ]);
@@ -90,7 +90,7 @@ export class AttestationDutiesService {

    for (const epoch of [currentEpoch, nextEpoch]) {
      // Download the duties and update the duties for the current and next epoch.
-      await this.pollBeaconAttestersForEpoch(epoch, indexArr).catch((e) => {
+      await this.pollBeaconAttestersForEpoch(epoch, indexArr).catch((e: Error) => {
        this.logger.error("Failed to download attester duties", {epoch}, e);
      });
    }
@@ -124,7 +124,7 @@ export class AttestationDutiesService {
    // If there are any subscriptions, push them out to the beacon node.
    if (beaconCommitteeSubscriptions.length > 0) {
      // TODO: Should log or throw?
-      await this.api.validator.prepareBeaconCommitteeSubnet(beaconCommitteeSubscriptions).catch((e) => {
+      await this.api.validator.prepareBeaconCommitteeSubnet(beaconCommitteeSubscriptions).catch((e: Error) => {
        throw extendError(e, "Failed to subscribe to beacon committee subnets");
      });
    }
@@ -140,7 +140,7 @@ export class AttestationDutiesService {
    }

    // TODO: Implement dependentRoot logic
-    const attesterDuties = await this.api.validator.getAttesterDuties(epoch, indexArr).catch((e) => {
+    const attesterDuties = await this.api.validator.getAttesterDuties(epoch, indexArr).catch((e: Error) => {
      throw extendError(e, "Failed to obtain attester duty");
    });
    const dependentRoot = attesterDuties.dependentRoot;
--- a/packages/validator/src/services/block.ts
+++ b/packages/validator/src/services/block.ts
@@ -39,7 +39,7 @@ export class BlockProposingService {
      this.logger.warn("Multiple block proposers", {slot, count: proposers.length});
    }

-    Promise.all(proposers.map((pubkey) => this.createAndPublishBlock(pubkey, slot))).catch((e) => {
+    Promise.all(proposers.map((pubkey) => this.createAndPublishBlock(pubkey, slot))).catch((e: Error) => {
      this.logger.error("Error on block duties", {slot}, e);
    });
  };
@@ -55,18 +55,18 @@ export class BlockProposingService {
      const graffiti = this.graffiti || "";

      this.logger.debug("Producing block", logCtx);
-      const block = await this.produceBlock(slot, randaoReveal, graffiti).catch((e) => {
+      const block = await this.produceBlock(slot, randaoReveal, graffiti).catch((e: Error) => {
        throw extendError(e, "Failed to produce block");
      });
      this.logger.debug("Produced block", logCtx);

      const signedBlock = await this.validatorStore.signBlock(pubkey, block.data, slot);
-      await this.api.beacon.publishBlock(signedBlock).catch((e) => {
+      await this.api.beacon.publishBlock(signedBlock).catch((e: Error) => {
        throw extendError(e, "Failed to publish block");
      });
      this.logger.info("Published block", {...logCtx, graffiti});
    } catch (e) {
-      this.logger.error("Error proposing block", logCtx, e);
+      this.logger.error("Error proposing block", logCtx, e as Error);
    }
  }

--- a/packages/validator/src/services/blockDuties.ts
+++ b/packages/validator/src/services/blockDuties.ts
@@ -70,7 +70,7 @@ export class BlockDutiesService {
        await this.pollBeaconProposersAndNotify(slot);
      }
    } catch (e) {
-      this.logger.error("Error on pollBeaconProposers", {}, e);
+      this.logger.error("Error on pollBeaconProposers", {}, e as Error);
    } finally {
      this.pruneOldDuties(computeEpochAtSlot(slot));
    }
@@ -135,7 +135,7 @@ export class BlockDutiesService {
      return;
    }

-    const proposerDuties = await this.api.validator.getProposerDuties(epoch).catch((e) => {
+    const proposerDuties = await this.api.validator.getProposerDuties(epoch).catch((e: Error) => {
      throw extendError(e, "Error on getProposerDuties");
    });
    const dependentRoot = proposerDuties.dependentRoot;
--- a/packages/validator/src/services/syncCommittee.ts
+++ b/packages/validator/src/services/syncCommittee.ts
@@ -64,13 +64,13 @@ export class SyncCommitteeService {
          if (duties.length === 0) return;
          // Then download, sign and publish a `SignedAggregateAndProof` for each
          // validator that is elected to aggregate for this `slot` and `subcommitteeIndex`.
-          await this.produceAndPublishAggregates(slot, subcommitteeIndex, beaconBlockRoot, duties).catch((e) => {
+          await this.produceAndPublishAggregates(slot, subcommitteeIndex, beaconBlockRoot, duties).catch((e: Error) => {
            this.logger.error("Error on SyncCommitteeContribution", {slot, index: subcommitteeIndex}, e);
          });
        })
      );
    } catch (e) {
-      this.logger.error("Error on runSyncCommitteeTasks", {slot}, e);
+      this.logger.error("Error on runSyncCommitteeTasks", {slot}, e as Error);
    }
  };

@@ -94,7 +94,7 @@ export class SyncCommitteeService {

    let blockRoot = this.chainHeaderTracker.getCurrentChainHead(slot);
    if (blockRoot === null) {
-      const blockRootData = await this.api.beacon.getBlockRoot("head").catch((e) => {
+      const blockRootData = await this.api.beacon.getBlockRoot("head").catch((e: Error) => {
        throw extendError(e, "Error producing SyncCommitteeMessage");
      });
      blockRoot = blockRootData.data;
@@ -110,7 +110,7 @@ export class SyncCommitteeService {
        );
        this.logger.debug("Signed SyncCommitteeMessage", logCtxValidator);
      } catch (e) {
-        this.logger.error("Error signing SyncCommitteeMessage", logCtxValidator, e);
+        this.logger.error("Error signing SyncCommitteeMessage", logCtxValidator, e as Error);
      }
    }

@@ -119,7 +119,7 @@ export class SyncCommitteeService {
        await this.api.beacon.submitPoolSyncCommitteeSignatures(signatures);
        this.logger.info("Published SyncCommitteeMessage", {...logCtx, count: signatures.length});
      } catch (e) {
-        this.logger.error("Error publishing SyncCommitteeMessage", logCtx, e);
+        this.logger.error("Error publishing SyncCommitteeMessage", logCtx, e as Error);
      }
    }

@@ -152,7 +152,7 @@ export class SyncCommitteeService {
    this.logger.verbose("Producing SyncCommitteeContribution", logCtx);
    const contribution = await this.api.validator
      .produceSyncCommitteeContribution(slot, subcommitteeIndex, beaconBlockRoot)
-      .catch((e) => {
+      .catch((e: Error) => {
        throw extendError(e, "Error producing SyncCommitteeContribution");
      });

@@ -169,7 +169,7 @@ export class SyncCommitteeService {
          this.logger.debug("Signed SyncCommitteeContribution", logCtxValidator);
        }
      } catch (e) {
-        this.logger.error("Error signing SyncCommitteeContribution", logCtxValidator, e);
+        this.logger.error("Error signing SyncCommitteeContribution", logCtxValidator, e as Error);
      }
    }

@@ -178,7 +178,7 @@ export class SyncCommitteeService {
        await this.api.validator.publishContributionAndProofs(signedContributions);
        this.logger.info("Published SyncCommitteeContribution", {...logCtx, count: signedContributions.length});
      } catch (e) {
-        this.logger.error("Error publishing SyncCommitteeContribution", logCtx, e);
+        this.logger.error("Error publishing SyncCommitteeContribution", logCtx, e as Error);
      }
    }
  }
--- a/packages/validator/src/services/syncCommitteeDuties.ts
+++ b/packages/validator/src/services/syncCommitteeDuties.ts
@@ -93,7 +93,7 @@ export class SyncCommitteeDutiesService {

    await Promise.all([
      // Run pollSyncCommittees immediately for all known local indices
-      this.pollSyncCommittees(currentEpoch, this.indicesService.getAllLocalIndices()).catch((e) => {
+      this.pollSyncCommittees(currentEpoch, this.indicesService.getAllLocalIndices()).catch((e: Error) => {
        this.logger.error("Error on poll SyncDuties", {epoch: currentEpoch}, e);
      }),

@@ -101,7 +101,7 @@ export class SyncCommitteeDutiesService {
      this.indicesService
        .pollValidatorIndices()
        .then((newIndices) => this.pollSyncCommittees(currentEpoch, newIndices))
-        .catch((e) => {
+        .catch((e: Error) => {
          this.logger.error("Error on poll indices and SyncDuties", {epoch: currentEpoch}, e);
        }),
    ]);
@@ -129,7 +129,7 @@ export class SyncCommitteeDutiesService {
    const nextPeriodEpoch = currentEpoch + EPOCHS_PER_SYNC_COMMITTEE_PERIOD;
    for (const epoch of [currentEpoch, nextPeriodEpoch]) {
      // Download the duties and update the duties for the current and next period.
-      await this.pollSyncCommitteesForEpoch(epoch, indexArr).catch((e) => {
+      await this.pollSyncCommitteesForEpoch(epoch, indexArr).catch((e: Error) => {
        this.logger.error("Failed to download SyncDuties", {epoch}, e);
      });
    }
@@ -167,7 +167,7 @@ export class SyncCommitteeDutiesService {
    // If there are any subscriptions, push them out to the beacon node.
    if (syncCommitteeSubscriptions.length > 0) {
      // TODO: Should log or throw?
-      await this.api.validator.prepareSyncCommitteeSubnets(syncCommitteeSubscriptions).catch((e) => {
+      await this.api.validator.prepareSyncCommitteeSubnets(syncCommitteeSubscriptions).catch((e: Error) => {
        throw extendError(e, "Failed to subscribe to sync committee subnets");
      });
    }
@@ -182,7 +182,7 @@ export class SyncCommitteeDutiesService {
      return;
    }

-    const syncDuties = await this.api.validator.getSyncCommitteeDuties(epoch, indexArr).catch((e) => {
+    const syncDuties = await this.api.validator.getSyncCommitteeDuties(epoch, indexArr).catch((e: Error) => {
      throw extendError(e, "Failed to obtain SyncDuties");
    });
    const dependentRoot = syncDuties.dependentRoot;
--- a/packages/validator/src/util/clock.ts
+++ b/packages/validator/src/util/clock.ts
@@ -34,7 +34,7 @@ export class Clock implements IClock {

  start(signal: AbortSignal): void {
    for (const {timeItem, fn} of this.fns) {
-      this.runAtMostEvery(timeItem, signal, fn).catch((e) => {
+      this.runAtMostEvery(timeItem, signal, fn).catch((e: Error) => {
        if (!isAbortedError(e)) {
          this.logger.error("runAtMostEvery", {}, e);
        }
@@ -68,7 +68,7 @@ export class Clock implements IClock {
    let slotOrEpoch = timeItem === TimeItem.Slot ? slot : computeEpochAtSlot(slot);
    while (!signal.aborted) {
      // Must catch fn() to ensure `sleep()` is awaited both for resolve and reject
-      await fn(slotOrEpoch, signal).catch((e) => this.logger.error("Error on runEvery fn", {}, e));
+      await fn(slotOrEpoch, signal).catch((e: Error) => this.logger.error("Error on runEvery fn", {}, e));

      try {
        await sleep(this.timeUntilNext(timeItem), signal);
@@ -117,7 +117,7 @@ export function getCurrentSlotAround(config: IChainForkConfig, genesisTime: Numb

 // function useEventStream() {
 //   this.stream = this.events.getEventStream([BeaconEventType.BLOCK, BeaconEventType.HEAD, BeaconEventType.CHAIN_REORG]);
-//   pipeToEmitter(this.stream, this).catch((e) => {
+//   pipeToEmitter(this.stream, this).catch((e: Error) => {
 //     this.logger.error("Error on stream pipe", {}, e);
 //   });

--- a/packages/validator/test/e2e/slashing-protection-interchange-tests/downloadTests.ts
+++ b/packages/validator/test/e2e/slashing-protection-interchange-tests/downloadTests.ts
@@ -11,7 +11,7 @@ downloadGenericSpecTests(
    testsToDownload: TESTS_TO_DOWNLOAD,
  },
  console.log
-).catch((e) => {
+).catch((e: Error) => {
  console.error(e);
  process.exit(1);
 });
--- a/packages/validator/test/setup.ts
+++ b/packages/validator/test/setup.ts
@@ -2,7 +2,7 @@ import {init} from "@chainsafe/bls";

 // blst-native initialization is syncronous
 // Initialize bls here instead of in before() so it's available inside describe() blocks
-init("blst-native").catch((e) => {
+init("blst-native").catch((e: Error) => {
  // eslint-disable-next-line no-console
  console.error(e);
  process.exit(1);
--- a/tsconfig.build.json
+++ b/tsconfig.build.json
@@ -12,6 +12,7 @@
    "strictFunctionTypes": true,
    "strictBindCallApply": true,
    "strictPropertyInitialization": true,
+    "useUnknownInCatchVariables": true,
    "noImplicitAny": true,
    "noImplicitThis": true,
    "noImplicitReturns": true,
--- a/yarn.lock
+++ b/yarn.lock
@@ -8328,10 +8328,10 @@ object.values@^1.1.3:
    define-properties "^1.1.3"
    es-abstract "^1.18.2"

-observable-fns@^0.5.1:
-  version "0.5.1"
-  resolved "https://registry.yarnpkg.com/observable-fns/-/observable-fns-0.5.1.tgz#9b56478690dd0fa8603e3a7e7d2975d88bca0904"
-  integrity sha512-wf7g4Jpo1Wt2KIqZKLGeiuLOEMqpaOZ5gJn7DmSdqXgTdxRwSdBhWegQQpPteQ2gZvzCKqNNpwb853wcpA0j7A==
+observable-fns@^0.6.1:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/observable-fns/-/observable-fns-0.6.1.tgz#636eae4fdd1132e88c0faf38d33658cc79d87e37"
+  integrity sha512-9gRK4+sRWzeN6AOewNBTLXir7Zl/i3GB6Yl26gK4flxz8BXVpD3kt8amREmWNb0mxYOGDotvE5a4N+PtGGKdkg==

 once@^1.3.0, once@^1.3.1, once@^1.4.0:
  version "1.4.0"
@@ -10379,15 +10379,15 @@ text-table@^0.2.0:
  resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
  integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=

-threads@^1.6.3:
-  version "1.6.4"
-  resolved "https://registry.yarnpkg.com/threads/-/threads-1.6.4.tgz#cf8ad992d6014b492f20cf3566048475a3045192"
-  integrity sha512-A+9MQFAUha9W8MjIPmrvETy98qVmZFr5Unox9D95y7kvz3fBpGiFS7JOZs07B2KvTHoRNI5MrGudRVeCmv4Alw==
+threads@^1.6.5:
+  version "1.6.5"
+  resolved "https://registry.yarnpkg.com/threads/-/threads-1.6.5.tgz#5cee7f139e3e147c5a64f0134844ee92469932a5"
+  integrity sha512-yL1NN4qZ25crW8wDoGn7TqbENJ69w3zCEjIGXpbqmQ4I+QHrG8+DLaZVKoX74OQUXWCI2lbbrUxDxAbr1xjDGQ==
  dependencies:
    callsites "^3.1.0"
    debug "^4.2.0"
    is-observable "^2.1.0"
-    observable-fns "^0.5.1"
+    observable-fns "^0.6.1"
  optionalDependencies:
    tiny-worker ">= 2"

@@ -10753,10 +10753,10 @@ typescript@3.8.3:
  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==

-typescript@^4.2.0:
-  version "4.2.4"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.2.4.tgz#8610b59747de028fda898a8aef0e103f156d0961"
-  integrity sha512-V+evlYHZnQkaz8TRBuxTA92yZBPotr5H+WhQ7bD3hZUndx5tGOa1fuCgeSjxAzM1RiN5IzvadIXTVefuuwZCRg==
+typescript@^4.4.0:
+  version "4.4.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-4.4.2.tgz#6d618640d430e3569a1dfb44f7d7e600ced3ee86"
+  integrity sha512-gzP+t5W4hdy4c+68bfcv0t400HVJMMd2+H9B7gae1nQlBzCqvrXX+6GL/b3GAgyTH966pzrZ70/fRjwAtZksSQ==

 uglify-js@^3.1.4:
  version "3.13.4"