@lodestar/beacon-node
Version:
A Typescript implementation of the beacon chain
42 lines • 2.02 kB
JavaScript
import { MAXIMUM_GOSSIP_CLOCK_DISPARITY } from "../../constants/constants.js";
import { ENRKey } from "../metadata.js";
export var ENRRelevance;
(function (ENRRelevance) {
ENRRelevance["no_tcp"] = "no_tcp";
ENRRelevance["no_eth2"] = "no_eth2";
// biome-ignore lint/style/useNamingConvention: Need to use the this name for network convention
ENRRelevance["unknown_forkDigest"] = "unknown_forkDigest";
ENRRelevance["current_fork_mismatch"] = "current_fork_mismatch";
ENRRelevance["relevant"] = "relevant";
})(ENRRelevance || (ENRRelevance = {}));
export function enrRelevance(enr, config, clock) {
// We are not interested in peers that don't advertise their tcp addr
const multiaddrTCP = enr.getLocationMultiaddr(ENRKey.tcp);
if (!multiaddrTCP) {
return ENRRelevance.no_tcp;
}
// Check if the ENR.eth2 field matches and is of interest
const eth2 = enr.kvs.get(ENRKey.eth2);
if (!eth2) {
return ENRRelevance.no_eth2;
}
// Fast de-serialization without SSZ
const forkDigest = eth2.slice(0, 4);
// Check if forkDigest matches any of our known forks.
const { fork: forkName } = config.forkDigest2ForkBoundaryOption(forkDigest) ?? {};
if (forkName === undefined) {
return ENRRelevance.unknown_forkDigest;
}
// Check if fork digest's fork matches ours
const currentSlot = clock.slotWithFutureTolerance(MAXIMUM_GOSSIP_CLOCK_DISPARITY);
const localForkInfo = config.getForkInfo(currentSlot);
// We only connect if the ENR's fork matches our current fork.
// We also allow it to be the previous fork due to delay and infrequent update of DHT.
if (forkName !== localForkInfo.name && forkName !== localForkInfo.prevForkName) {
return ENRRelevance.current_fork_mismatch;
}
// TODO: If we have next fork scheduled, check if next fork info matches ours
// const enrForkId = ssz.phase0.ENRForkID.deserialize(eth2);
return ENRRelevance.relevant;
}
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