@lodestar/beacon-node/lib/chain/validation/signatureSets/contributionAndProof.js

A Typescript implementation of the beacon chain

import { DOMAIN_CONTRIBUTION_AND_PROOF } from "@lodestar/params";
import { SignatureSetType, computeSigningRoot, } from "@lodestar/state-transition";
import { ssz } from "@lodestar/types";
export function getContributionAndProofSignatureSet(state, signedContributionAndProof) {
    const { epochCtx } = state;
    const domain = state.config.getDomain(state.slot, DOMAIN_CONTRIBUTION_AND_PROOF, signedContributionAndProof.message.contribution.slot);
    const signingData = signedContributionAndProof.message;
    return {
        type: SignatureSetType.single,
        pubkey: epochCtx.index2pubkey[signedContributionAndProof.message.aggregatorIndex],
        signingRoot: computeSigningRoot(ssz.altair.ContributionAndProof, signingData, domain),
        signature: signedContributionAndProof.signature,
    };
}
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