Running beacon node locally reaches out to external services

[nazarhussain]

Describe the bug

Running the node locally reaches out to external serve.

Expected behavior

Node should not ping to any external services or server.

Steps to reproduce

lodestar on  unstable [$!] via 🐳 desktop-linux via  v22.4.0 
❯ ./lodestar beacon --network sepolia --logLevel info --jwtSecret=/tmp/geth/jwt
Aug-13 11:32:08.053[]                 info: Lodestar network=sepolia, version=v1.20.2/nh/state-diff-2/5f2da01, commit=5f2da01b975b0d638171fe3cd4a45983ee91c8af
Aug-13 11:32:08.057[]                 info: Connected to LevelDB database path=/Users/nazar/.local/share/lodestar/sepolia/chain-db
 ✖ RequestError: getaddrinfo ENOTFOUND github.com
    at ClientRequest.<anonymous> (/Users/nazar/Hub/Lodestar/dev/lodestar-2/node_modules/got/dist/source/core/index.js:970:111)
    at Object.onceWrapper (node:events:635:26)
    at ClientRequest.emit (node:events:532:35)
    at ClientRequest.origin.emit (/Users/nazar/Hub/Lodestar/dev/lodestar-2/node_modules/@szmarczak/http-timer/dist/source/index.js:43:20)
    at TLSSocket.socketErrorListener (node:_http_client:502:9)
    at TLSSocket.emit (node:events:520:28)
    at emitErrorNT (node:internal/streams/destroy:170:8)
    at emitErrorCloseNT (node:internal/streams/destroy:129:3)
    at processTicksAndRejections (node:internal/process/task_queues:82:21)
    at GetAddrInfoReqWrap.onlookupall [as oncomplete] (node:dns:120:26)

Additional context

Digging further shows that @szmarczak/http-timer is a webdriver dependency, which is a dev dependency so should not be involved in the runtime.

Operating system

Linux

Lodestar version or commit hash

unstbale

[nflaig]

It's not clear from the stack trace but I think this is the request to fetch bootnodes from config repos on github

lodestar/packages/cli/src/networks/index.ts

Line 94 in 64fe1db

const bootnodesFile = await got.get(bootnodesFileUrl).text();

lodestar/packages/cli/src/networks/sepolia.ts

Lines 4 to 6 in 64fe1db

	export const genesisFileUrl = "https://github.com/eth-clients/sepolia/raw/main/metadata/genesis.ssz";
	export const bootnodesFileUrl =
	"https://raw.githubusercontent.com/eth-clients/sepolia/main/metadata/bootstrap_nodes.txt";

This should not cause issues, it just prints the error, we could think about making this less noisy.

I don't think we should remove fetching bootnode ENRs from github as otherwise we would solely rely on the hard coded bootnodes, which for mainnet works as it has a stable set of bootnodes but especially for testnets it's better to pull from github.

See previous discussion on managing bootnodes

• Strategy for managing bootnode ENRs #5838

[nazarhussain]

The error originated from @szmarczak/http-timer which is a webdriver dependency. That is weird and need to look into.

[nflaig]

The error originated from @szmarczak/http-timer which is a webdriver dependency.

It is from got which we use here to fetch the bootnodes, see node_modules/got/dist/source/core/index.js (from stack trace). It's a dependency of got https://www.npmjs.com/package/got?activeTab=dependencies