Add example usage script.

CHANGELOG.md

@@ -1,5 +1,10 @@
 # @digitalbazaar/vc ChangeLog
 
+## 7.0.1 - 2024-xx-xx
+
+### Added
+- Example roundtrip issue/verify script.
+
 ## 7.0.0 - 2024-08-01
 
 ### Added

examples/rt.js

@@ -0,0 +1,130 @@
+/*!
+ * Copyright (c) 2019-2023 Digital Bazaar, Inc. All rights reserved.
+ */
+
+// Example round trip.
+// - generate example ECDSA did:key
+// - setup 'ecdsa-rdfc-2019 DataIntegrityProof
+// - setup document loader
+// - sign credential
+// - verify credential
+
+import * as EcdsaMultikey from '@digitalbazaar/ecdsa-multikey';
+import {cryptosuite as ecdsaRdfc2019Cryptosuite} from
+  '@digitalbazaar/ecdsa-rdfc-2019-cryptosuite';
+//import * as vc from '@digitalbazaar/vc';
+import * as vc from '../lib/index.js';
+import {DataIntegrityProof} from '@digitalbazaar/data-integrity';
+import {driver} from '@digitalbazaar/did-method-key';
+
+// setup document loader
+import {CachedResolver} from '@digitalbazaar/did-io';
+import {securityLoader} from '@digitalbazaar/security-document-loader';
+
+//import {contexts as secContexts} from '@digitalbazaar/security-context';
+import {contexts as diContexts} from '@digitalbazaar/data-integrity-context';
+
+const loader = securityLoader();
+//loader.addDocuments({documents: secContexts});
+loader.addDocuments({documents: diContexts});
+// example static context
+loader.addStatic(
+  'https://example.com/ex/v1',
+  /* eslint-disable quotes, quote-props, max-len */
+  {
+    "@context": {
+      "ExampleCredential": "https://example.com/ex#Example",
+      "example": "https://example.com/ex#example"
+    }
+  }
+  /* eslint-enable quotes, quote-props, max-len */
+);
+const resolver = new CachedResolver();
+const didKeyDriverMultikey = driver();
+
+didKeyDriverMultikey.use({
+  multibaseMultikeyHeader: 'zDna',
+  fromMultibase: EcdsaMultikey.from
+});
+resolver.use(didKeyDriverMultikey);
+loader.setDidResolver(resolver);
+
+const documentLoader = loader.build();
+
+async function main({credential, documentLoader}) {
+  // generate example ecdsa keypair
+
+  const ecdsaKeyPair = await EcdsaMultikey.generate({curve: 'P-256'});
+
+  const {
+    didDocument/*, keyPairs, methodFor*/
+  } = await didKeyDriverMultikey.fromKeyPair({
+    verificationKeyPair: ecdsaKeyPair
+  });
+  ecdsaKeyPair.id = didDocument.assertionMethod[0];
+  ecdsaKeyPair.controller = didDocument.id;
+
+  // ensure issuer matches key controller
+  credential.issuer = ecdsaKeyPair.controller;
+
+  // setup ecdsa-rdfc-2019 signing suite
+  const signingSuite = new DataIntegrityProof({
+    signer: ecdsaKeyPair.signer(),
+    // date: '2023-01-01T01:01:01Z',
+    cryptosuite: ecdsaRdfc2019Cryptosuite
+  });
+
+  // setup documentLoader
+
+  // sign credential
+  const verifiableCredential = await vc.issue({
+    credential,
+    suite: signingSuite,
+    documentLoader
+  });
+
+  // setup ecdsa-rdfc-2019 verifying suite
+  const verifyingSuite = new DataIntegrityProof({
+    cryptosuite: ecdsaRdfc2019Cryptosuite
+  });
+
+  // verify signed credential
+  const verifyResult = await vc.verifyCredential({
+    credential: verifiableCredential,
+    suite: verifyingSuite,
+    documentLoader
+  });
+
+  console.log('INPUT CREDENTIAL:');
+  console.log(JSON.stringify(credential, null, 2));
+  console.log('SIGNED CREDENTIAL:');
+  console.log(JSON.stringify(verifiableCredential, null, 2));
+  console.log('VERIFY RESULT:');
+  console.log(JSON.stringify(verifyResult, null, 2));
+}
+
+// sample unsigned credential
+const credential =
+// Use plain JSON style for data
+/* eslint-disable quotes, quote-props, max-len */
+{
+  "@context": [
+    "https://www.w3.org/2018/credentials/v1",
+    "https://example.com/ex/v1"
+  ],
+  "id": "https://example.com/credentials/1872",
+  "type": ["VerifiableCredential", "ExampleCredential"],
+  "issuer": "https://example.edu/issuers/565049",
+  "issuanceDate": "2010-01-01T19:23:24Z",
+  "credentialSubject": {
+    "id": "did:example:ebfeb1f712ebc6f1c276e12ec21",
+    "example": "Example Data"
+  }
+}
+/* eslint-enable quotes, quote-props, max-len */
+;
+
+await main({
+  credential,
+  documentLoader
+});

package.json

@@ -39,12 +39,16 @@
     "@digitalbazaar/credentials-examples-context": "^1.0.0",
     "@digitalbazaar/data-integrity": "^2.2.0",
     "@digitalbazaar/data-integrity-context": "^2.0.1",
+    "@digitalbazaar/did-io": "^2.0.0",
+    "@digitalbazaar/did-method-key": "^5.2.0",
     "@digitalbazaar/ecdsa-multikey": "^1.7.0",
+    "@digitalbazaar/ecdsa-rdfc-2019-cryptosuite": "^1.1.0",
     "@digitalbazaar/ecdsa-sd-2023-cryptosuite": "^3.2.1",
     "@digitalbazaar/ed25519-signature-2018": "^4.0.0",
     "@digitalbazaar/ed25519-verification-key-2018": "^4.0.0",
     "@digitalbazaar/multikey-context": "^2.0.1",
     "@digitalbazaar/odrl-context": "^1.0.0",
+    "@digitalbazaar/security-document-loader": "^3.0.0",
     "c8": "^10.1.2",
     "chai": "^4.5.0",
     "cross-env": "^7.0.3",