digitalbazaarhttp-signature-zcap-verify
A library for verifying Authorization Capability (ZCAP) invocations via HTTP signatures
Example "getVerifier" for "verifyCapabilityInvocation"
import {CryptoLD} from 'crypto-ld';
import {Ed25519VerificationKey2020} from
'@digitalbazaar/ed25519-verification-key-2020';
const cryptoLd = new CryptoLD();
cryptoLd.use(Ed25519VerificationKey2020);
async function getVerifier({keyId, documentLoader}) {
const key = await cryptoLd.fromKeyId({id: keyId, documentLoader});
const verificationMethod = await key.export(
{publicKey: true, includeContext: true});
const verifier = key.verifier();
return {verifier, verificationMethod};
}