How I issue VCs

issue.ts

import { verifiable } from '@transmute/vc.js';
import { documentLoaders } from 'jsonld';
// import { log } from '../utils/logger';
import { Ed25519Signature2018, Ed25519VerificationKey2018 } from '@transmute/ed25519-signature-2018';

export const vcCreateWithSignature = async (signableTemplate, documentLoader, suite) => {
  const output = await verifiable.credential.create({
    credential: signableTemplate,
    documentLoader: documentLoader,
    suite: suite,
  });

  const items = output.items;
  const signedDocument = items[0];

  return signedDocument;
};

export const documents = {
  'https://www.w3.org/2018/credentials/v1': credentialContext,
  'https://w3id.org/traceability/v1': tracebilityContext,
  'https://credreg.net/ctdlasn/schema/context/json': cregContext,
  'https://w3id.org/security/bbs/v1': bbsPlussSecurity,
  'https://w3id.org/security/v1': securityV1,
  'https://w3id.org/security/v2': securityV2,
};

export const docLoader = (url: string) => {
  //Its worth considering caching contextes that we use alot, to speed up things
  //Ref: https://github.com/mattrglobal/jsonld-signatures-bbs/issues/115
  //If you want too see the url that is loaded uncomment this
  // console.log(url)
  const context = documents[url];
  if (context) {
    return {
      contextUrl: null, // this is for a context via a link header
      document: context, // this is the actual document that was loaded
      documentUrl: url, // this is the actual context URL after redirects
    };
  }
  log(`Hitting document request for this url: ${url}`, { url }, 'WARNING');
  return documentLoaders.node()(url);
};

const getSuite = (key) => {
  // key is a import { Ed25519KeyPair } from '@transmute/did-key-ed25519'; type
  const jwk = await key.export({
    privateKey: true,
    type: DIDKeyTypes.JSONWebKey2020,
  });
  const verificationKey = await Ed25519VerificationKey2018.from(jwk);
  return new Ed25519Signature2018({ key: verificationKey });
}