Package Exports

@transmute/bbs-bls12381-signature-2020
@transmute/bbs-bls12381-signature-2020/dist/index.js

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (@transmute/bbs-bls12381-signature-2020) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

@transmute/bbs-bls12381-signature-2020

npm i @transmute/bbs-bls12381-signature-2020 --save

Read the Spec

Usage

import {
  Bls12381G2KeyPair,
  BbsBlsSignature2020,
  BbsBlsSignatureProof2020,
} from "@transmute/bbs-bls12381-signature-2020";

import { documentLoader } from "path/somewhere";
import { verifiable } from "@transmute/vc.js";

const key = await Bls12381G2KeyPair.from({
  id: "did:example:123#key-0",
  type: "JsonWebKey2020",
  controller: "did:example:123",
  publicKeyJwk: {
    kty: "EC",
    crv: "BLS12381_G2",
    x:
      "ixPeWzjhGlmfoRTxKnUdDDpuiYXix9Yoy68Chb1r47J4-wxqPvFxVIgQN-8qQEgACterr23Ogo3XmcHYgcdnlPsfArPriZzrUv4jpstRt2Q6UmYoGqOWXyIBnFtCBad6",
  },
  privateKeyJwk: {
    kty: "EC",
    crv: "BLS12381_G2",
    x:
      "ixPeWzjhGlmfoRTxKnUdDDpuiYXix9Yoy68Chb1r47J4-wxqPvFxVIgQN-8qQEgACterr23Ogo3XmcHYgcdnlPsfArPriZzrUv4jpstRt2Q6UmYoGqOWXyIBnFtCBad6",
    d: "Jh-q1-B5mj7wMQQu44skVzPy0wWPTRtBNiXY8AAs0zc",
  },
});

const result = await verifiable.credential.create({
  credential: {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://w3id.org/security/suites/bls12381-2020/v1",
      {
        alsoKnownAs: "https://www.w3.org/ns/activitystreams#alsoKnownAs",
      },
    ],
    id: "http://example.edu/credentials/3732",
    type: ["VerifiableCredential"],
    issuer: {
      id:
        "did🔑z5TcCKfym9h8Vr6dmAgaebq4DBwxKM5Lm9pvt4E8JBqQz43HvtC3zGLrcyC3233fQz8h1T6w8kDzFepmAHA9cCYxTB2Gv3oSn5iazjj8wvYBweH8CQ5VnMoVnHS6Gqnchu5YBUnhRsUAfNymtG9CRfkC97TpbBQ6b1A2AfDvmC8tdYcLkDDA2Ehti5cY27PzG6DLGKF3P",
    },
    issuanceDate: "2010-01-01T19:23:24Z",
    credentialSubject: {
      alsoKnownAs: "did:example:ebfeb1f712ebc6f1c276e12ec21",
    },
  },
  format: ["vc"],
  documentLoader: documentLoader,
  suite: new BbsBlsSignature2020({
    key,
  }),
});

const result1 = await verifiable.credential.derive({
  credential: {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://w3id.org/security/suites/bls12381-2020/v1",
      {
        alsoKnownAs: "https://www.w3.org/ns/activitystreams#alsoKnownAs",
      },
    ],
    id: "http://example.edu/credentials/3732",
    type: ["VerifiableCredential"],
    issuer: {
      id:
        "did🔑z5TcCKfym9h8Vr6dmAgaebq4DBwxKM5Lm9pvt4E8JBqQz43HvtC3zGLrcyC3233fQz8h1T6w8kDzFepmAHA9cCYxTB2Gv3oSn5iazjj8wvYBweH8CQ5VnMoVnHS6Gqnchu5YBUnhRsUAfNymtG9CRfkC97TpbBQ6b1A2AfDvmC8tdYcLkDDA2Ehti5cY27PzG6DLGKF3P",
    },
    issuanceDate: "2010-01-01T19:23:24Z",
    credentialSubject: {
      alsoKnownAs: "did:example:ebfeb1f712ebc6f1c276e12ec21",
    },
    proof: {
      type: "BbsBlsSignature2020",
      created: "2010-01-01T19:23:24Z",
      verificationMethod:
        "did🔑z5TcCKfym9h8Vr6dmAgaebq4DBwxKM5Lm9pvt4E8JBqQz43HvtC3zGLrcyC3233fQz8h1T6w8kDzFepmAHA9cCYxTB2Gv3oSn5iazjj8wvYBweH8CQ5VnMoVnHS6Gqnchu5YBUnhRsUAfNymtG9CRfkC97TpbBQ6b1A2AfDvmC8tdYcLkDDA2Ehti5cY27PzG6DLGKF3P#zUC75GQp8DFusgffgEyvGiSoXL7UztujwGyjHXdJP9PcAz74dgGCrFSNyhKFPCsuxXeKLko5H19M2sL8RA45f7SMc2pKx3uvfn1KSB7nSh7GqX59kxWksVTSicghfFLGZBNK9ah",
      proofPurpose: "assertionMethod",
      proofValue:
        "iqPux4PDWBuSpRc3mqKTJJetr0zes3g9pDiQZbL8oeV/od+PLzeVCqGSZc657yu2T0AHSxEzuZcqOD8zZ2nAixphk7rSxyYkOzg5HpWsKxYP/89qtR30JG5YOYESilRb6CByt2Idi5Hj3R0uA5YsJw==",
    },
  },
  frame: {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://w3id.org/security/suites/bls12381-2020/v1",
    ],
    type: ["VerifiableCredential"],
    credentialSubject: {
      alsoKnownAs: { id: {} },
    },
  },
  format: ["vc"],
  documentLoader: documentLoader,
  suite: new BbsBlsSignatureProof2020(BbsBlsSignatureProof2020),
});

const result2 = await verifiable.credential.verify({
  credential: {
    "@context": [
      "https://www.w3.org/2018/credentials/v1",
      "https://w3id.org/security/suites/bls12381-2020/v1",
      {
        alsoKnownAs: "https://www.w3.org/ns/activitystreams#alsoKnownAs",
      },
    ],
    id: "http://example.edu/credentials/3732",
    type: "VerifiableCredential",
    credentialSubject: {
      id: "urn:bnid:_:c14n0",
      alsoKnownAs: "did:example:ebfeb1f712ebc6f1c276e12ec21",
    },
    issuanceDate: "2010-01-01T19:23:24Z",
    issuer:
      "did🔑z5TcCKfym9h8Vr6dmAgaebq4DBwxKM5Lm9pvt4E8JBqQz43HvtC3zGLrcyC3233fQz8h1T6w8kDzFepmAHA9cCYxTB2Gv3oSn5iazjj8wvYBweH8CQ5VnMoVnHS6Gqnchu5YBUnhRsUAfNymtG9CRfkC97TpbBQ6b1A2AfDvmC8tdYcLkDDA2Ehti5cY27PzG6DLGKF3P",
    proof: {
      type: "BbsBlsSignatureProof2020",
      nonce:
        "XZZvSvXvyFc6M4SzqiT1XF7sI2b9bqsQtIMS+uTg2aiYdbidB0bqQw+ohg/NiBQSytA=",
      proofValue:
        "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",
      verificationMethod:
        "did🔑z5TcCKfym9h8Vr6dmAgaebq4DBwxKM5Lm9pvt4E8JBqQz43HvtC3zGLrcyC3233fQz8h1T6w8kDzFepmAHA9cCYxTB2Gv3oSn5iazjj8wvYBweH8CQ5VnMoVnHS6Gqnchu5YBUnhRsUAfNymtG9CRfkC97TpbBQ6b1A2AfDvmC8tdYcLkDDA2Ehti5cY27PzG6DLGKF3P#zUC75GQp8DFusgffgEyvGiSoXL7UztujwGyjHXdJP9PcAz74dgGCrFSNyhKFPCsuxXeKLko5H19M2sL8RA45f7SMc2pKx3uvfn1KSB7nSh7GqX59kxWksVTSicghfFLGZBNK9ah",
      proofPurpose: "assertionMethod",
      created: "2010-01-01T19:23:24Z",
    },
  },
  format: ["vc"],
  documentLoader: (iri: string) => {
    if (iri.startsWith("did:example:345")) {
      return {
        documentUrl: iri,
        document: {
          "@context": [
            "https://www.w3.org/ns/did/v1",
            "https://w3id.org/security/suites/bls12381-2020/v1",
          ],
          id: "did:example:345",
          assertionMethod: [
            {
              id: "did:example:345#key-1",
              type: "Bls12381G2Key2020",
              controller: "did:example:345",
              publicKeyBase58:
                "24urEcrYHvx6eReCPRdvTLHUictArUTQpENSGwTRB1KosFNKLdN9cDVvbX5KMWnR2omGpSeJuT2q9uUGrasKWqht9YyMSd5aukprRGVFFNYrzxgCd137PwsdSXhbxxWoCmga",
            },
          ],
        },
      };
    }
    return documentLoader(iri);
  },
  suite: [new BbsBlsSignatureProof2020()],
});

About

This module is based on the original here.

It was modified to simplify JSON-LD contexts, and eliminate dependency inherentence.