@lodestar/state-transition/lib/signatureSets/proposerSlashings.js

Beacon Chain state transition function and utils

import { DOMAIN_BEACON_PROPOSER } from "@lodestar/params";
import { ssz } from "@lodestar/types";
import { SignatureSetType, computeSigningRoot } from "../util/index.js";
/**
 * Extract signatures to allow validating all block signatures at once
 */
export function getProposerSlashingSignatureSets(state, proposerSlashing) {
    const { epochCtx } = state;
    const pubkey = epochCtx.index2pubkey[proposerSlashing.signedHeader1.message.proposerIndex];
    // In state transition, ProposerSlashing headers are only partially validated. Their slot could be higher than the
    // clock and the slashing would still be valid. Must use bigint variants to hash correctly to all possible values
    return [proposerSlashing.signedHeader1, proposerSlashing.signedHeader2].map((signedHeader) => {
        const domain = state.config.getDomain(state.slot, DOMAIN_BEACON_PROPOSER, Number(signedHeader.message.slot));
        return {
            type: SignatureSetType.single,
            pubkey,
            signingRoot: computeSigningRoot(ssz.phase0.BeaconBlockHeaderBigint, signedHeader.message, domain),
            signature: signedHeader.signature,
        };
    });
}
export function getProposerSlashingsSignatureSets(state, signedBlock) {
    return signedBlock.message.body.proposerSlashings.flatMap((proposerSlashing) => getProposerSlashingSignatureSets(state, proposerSlashing));
}
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