feat: [LERX-550] Restore vc-js

Reapplying changes to an old fork of the digitalbazaar/jc package since 1EdTech decided to delete their fork

.gitignore

@@ -17,3 +17,4 @@ npm-debug.log
 package-lock.json
 .nyc_output
 dist
+.idea

lib/contexts/index.js

@@ -2,8 +2,11 @@
  * Copyright (c) 2019-2022 Digital Bazaar, Inc. All rights reserved.
  */
 import {
-  contexts as credentialContexts
+  contexts as credential1Contexts
 } from 'credentials-context';
+import {
+  contexts as credential2Contexts
+} from '@digitalbazaar/credentials-v2-context';
 import {
   CONTEXT as vcExamplesV1Context,
   CONTEXT_URL as vcExamplesV1ContextUrl
@@ -18,6 +21,9 @@ export const contexts = {};
 contexts[vcExamplesV1ContextUrl] = vcExamplesV1Context;
 contexts[odrlContextUrl] = odrlContext;
 
-for(const [url, context] of credentialContexts.entries()) {
+for(const [url, context] of credential1Contexts.entries()) {
+  contexts[url] = context;
+}
+for(const [url, context] of credential2Contexts.entries()) {
   contexts[url] = context;
 }

lib/index.js

@@ -40,10 +40,12 @@ import {CredentialIssuancePurpose} from './CredentialIssuancePurpose.js';
 import {documentLoader as _documentLoader} from './documentLoader.js';
 export const defaultDocumentLoader =
   jsigs.extendContextLoader(_documentLoader);
-import * as credentialsContext from 'credentials-context';
+import * as credentials1Context from 'credentials-context';
+import * as credentials2Context from '@digitalbazaar/credentials-v2-context';
 
 const {AuthenticationProofPurpose} = jsigs.purposes;
-const {constants: {CREDENTIALS_CONTEXT_V1_URL}} = credentialsContext;
+const {constants: {CREDENTIALS_CONTEXT_V1_URL}} = credentials1Context;
+const CREDENTIALS_CONTEXT_V2_URL = credentials2Context.CONTEXT_URL;
 
 export {CredentialIssuancePurpose};
 
@@ -134,9 +136,14 @@ export async function issue({
   }
 
   // Set the issuance date to now(), if missing
-  if(!credential.issuanceDate) {
+  if((credential['@context'][0] === CREDENTIALS_CONTEXT_V1_URL) &&
+    !credential.issuanceDate) {
     const now = (new Date()).toJSON();
     credential.issuanceDate = `${now.substr(0, now.length - 5)}Z`;
+  } else if((credential['@context'][0] === CREDENTIALS_CONTEXT_V2_URL) &&
+    !credential.validFrom) {
+    const now = (new Date()).toJSON();
+    credential.validFrom = `${now.substr(0, now.length - 5)}Z`;
   }
 
   // run common credential checks
@@ -512,10 +519,11 @@ export function _checkPresentation(presentation) {
     presentation['@context'] : [presentation['@context']];
 
   // ensure first context is 'https://www.w3.org/2018/credentials/v1'
-  if(context[0] !== CREDENTIALS_CONTEXT_V1_URL) {
+  if((context[0] !== CREDENTIALS_CONTEXT_V1_URL) &&
+    (context[0] !== CREDENTIALS_CONTEXT_V2_URL)) {
     throw new Error(
-      `"${CREDENTIALS_CONTEXT_V1_URL}" needs to be first in the ` +
-      'list of contexts.');
+      `"${CREDENTIALS_CONTEXT_V1_URL}" or ${CREDENTIALS_CONTEXT_V2_URL} ` +
+      'needs to be first in the list of contexts.');
   }
 
   const types = jsonld.getValues(presentation, 'type');
@@ -542,10 +550,11 @@ export function _checkCredential({credential, now = new Date()}) {
     now = new Date(now);
   }
   // ensure first context is 'https://www.w3.org/2018/credentials/v1'
-  if(credential['@context'][0] !== CREDENTIALS_CONTEXT_V1_URL) {
+  if((credential['@context'][0] !== CREDENTIALS_CONTEXT_V1_URL) &&
+    (credential['@context'][0] !== CREDENTIALS_CONTEXT_V2_URL)) {
     throw new Error(
-      `"${CREDENTIALS_CONTEXT_V1_URL}" needs to be first in the ` +
-      'list of contexts.');
+      `"${CREDENTIALS_CONTEXT_V1_URL}" or "${CREDENTIALS_CONTEXT_V2_URL}" ` +
+      'needs to be first in the list of contexts.');
   }
 
   // check type presence and cardinality
@@ -572,27 +581,54 @@ export function _checkCredential({credential, now = new Date()}) {
     throw new Error('"issuer" property is required.');
   }
 
-  // check issuanceDate cardinality
-  if(jsonld.getValues(credential, 'issuanceDate').length > 1) {
-    throw new Error('"issuanceDate" property can only have one value.');
-  }
+  // ensure first context is 'https://www.w3.org/2018/credentials/v1'
+  if(credential['@context'][0] === CREDENTIALS_CONTEXT_V1_URL) {
+    // check issuanceDate cardinality
+    if(jsonld.getValues(credential, 'issuanceDate').length > 1) {
+      throw new Error('"issuanceDate" property can only have one value.');
+    }
 
-  // check issued is a date
-  if(!credential.issuanceDate) {
-    throw new Error('"issuanceDate" property is required.');
-  }
+    // check issued is a date
+    if(!credential.issuanceDate) {
+      throw new Error('"issuanceDate" property is required.');
+    }
 
-  if('issuanceDate' in credential) {
-    let {issuanceDate} = credential;
-    if(!dateRegex.test(issuanceDate)) {
-      throw new Error(`"issuanceDate" must be a valid date: ${issuanceDate}`);
+    if('issuanceDate' in credential) {
+      let {issuanceDate} = credential;
+      if(!dateRegex.test(issuanceDate)) {
+        throw new Error(`"issuanceDate" must be a valid date: ${issuanceDate}`);
+      }
+      // check if `now` is before `issuanceDate`
+      issuanceDate = new Date(issuanceDate);
+      if(now < issuanceDate) {
+        throw new Error(
+          `The current date time (${now.toISOString()}) is before the ` +
+          `"issuanceDate" (${issuanceDate.toISOString()}).`);
+      }
     }
-    // check if `now` is before `issuanceDate`
-    issuanceDate = new Date(issuanceDate);
-    if(now < issuanceDate) {
-      throw new Error(
-        `The current date time (${now.toISOString()}) is before the ` +
-        `"issuanceDate" (${issuanceDate.toISOString()}).`);
+  } else if(credential['@context'][0] === CREDENTIALS_CONTEXT_V2_URL) {
+    // check validFrom cardinality
+    if(jsonld.getValues(credential, 'validFrom').length > 1) {
+      throw new Error('"validFrom" property can only have one value.');
+    }
+
+    // check issued is a date
+    if(!credential.validFrom) {
+      throw new Error('"validFrom" property is required.');
+    }
+
+    if('validFrom' in credential) {
+      let {validFrom} = credential;
+      if(!dateRegex.test(validFrom)) {
+        throw new Error(`"validFrom" must be a valid date: ${validFrom}`);
+      }
+      // check if `now` is before `validFrom`
+      validFrom = new Date(validFrom);
+      if(now < validFrom) {
+        throw new Error(
+          `The current date time (${now.toISOString()}) is before the ` +
+          `"validFrom" (${validFrom.toISOString()}).`);
+      }
     }
   }
 

package.json

@@ -28,6 +28,7 @@
     "lib/**/*.js"
   ],
   "dependencies": {
+    "@digitalbazaar/credentials-v2-context": "github:digitalbazaar/credentials-v2-context",
     "credentials-context": "^2.0.0",
     "jsonld": "^8.0.0",
     "jsonld-signatures": "^11.0.0"