DID resolution with no active blockchain connection (#443)

* DID resolution withtou blockchain connection

* DID resolution with no blockchain connection

* fixing issues with blockchain ready flag

* fixing tests

Author: maycon-mello

integration-tests/did-resolution.test.ts

@@ -1,20 +1,12 @@
 import {blockchainService} from '@docknetwork/wallet-sdk-wasm/src/services/blockchain';
-import {issueCredential} from './helpers/certs-helpers';
 import {
   getWallet,
   getDIDProvider,
-  getMessageProvider,
   closeWallet,
 } from './helpers/wallet-helpers';
-import {logger} from '@docknetwork/wallet-sdk-data-store/src/logger';
 import { storageService } from '@docknetwork/wallet-sdk-wasm/src/services/storage';
 
 describe('DID resolution', () => {
-  let wallet;
-
-  beforeAll(async () => {
-    wallet = await getWallet();
-  });
 
   it('should resolve did service endpoints', async () => {
     const wallet = await getWallet();
@@ -34,7 +26,24 @@ describe('DID resolution', () => {
     const cachedEntry = JSON.parse(cacheJSON);
     expect(cachedEntry.value).toEqual(doc1);
     expect(cachedEntry.id).toEqual('did:cheqd:testnet:c0890f1c-c7bb-4ea6-be7a-8c31404743b7');
+
+    closeWallet(wallet)
   });
 
-  afterAll(() => closeWallet(wallet));
+  it('should resolve DID without active blockchain connection (fallback resolver)', async () => {
+    const doc1 = await blockchainService.resolveDID(
+      'did:cheqd:testnet:c0890f1c-c7bb-4ea6-be7a-8c31404743b7',
+    );
+
+    const messagingService = doc1.service.find(service => service.type === 'DIDCommMessaging');
+    expect(messagingService).toBeDefined();
+
+    const cacheKey = `did-cache:did:cheqd:testnet:c0890f1c-c7bb-4ea6-be7a-8c31404743b7`;
+    const cacheJSON = await storageService.getItem(cacheKey);
+    expect(cacheJSON).toBeDefined();
+
+    const cachedEntry = JSON.parse(cacheJSON);
+    expect(cachedEntry.value).toEqual(doc1);
+    expect(cachedEntry.id).toEqual('did:cheqd:testnet:c0890f1c-c7bb-4ea6-be7a-8c31404743b7');
+  });
 });

packages/relay-service/src/index.js

@@ -112,8 +112,6 @@ const getMessages = async ({
   assert(Array.isArray(keyPairDocs), 'keyPairDocs must be an array');
   assert(!!keyPairDocs.length, 'keyPairDocs must not be empty');
 
-  await blockchainService.waitBlockchainReady();
-
   const {payload, dids} = await generateSignedPayloadFromList(keyPairDocs, {
     limit,
   });

packages/relay-service/tests/didcomm.test.js

@@ -26,11 +26,11 @@ const mockDIDResolver = {
 };
 
 blockchainService.createDIDResolver = () => mockDIDResolver;
-blockchainService.resolver = mockDIDResolver;
+blockchainService._resolver = mockDIDResolver;
 
 describe('DIDComm', () => {
   it('expect to decrypt didcomm message', async () => {
-    blockchainService.resolver = mockDIDResolver;
+    blockchainService._resolver = mockDIDResolver;
 
     const keyAgreementKey = await getDerivedAgreementKey(ALICE_KEY_PAIR_DOC);
 

packages/wasm/src/services/blockchain/service.ts

@@ -60,7 +60,11 @@ export class BlockchainService {
   cheqdApi;
   cheqdApiUrl;
   isBlockchainReady = false;
-  resolver: any;
+  private _resolver: any;
+
+  get resolver(): any {
+    return this._resolver;
+  }
   /**
    * Event names emitted by the blockchain service
    * @static
@@ -93,7 +97,8 @@ export class BlockchainService {
     this.cheqdModules = new CheqdCoreModules(this.cheqdApi);
     this.modules = new MultiApiCoreModules([this.cheqdModules]);
     this.emitter = new EventEmitter();
-    this.resolver = this.createDIDResolver();
+    // Blockchain is not ready yet, but we can use fallback resolvers
+    this._resolver = this.createDIDResolver();
   }
 
   /**
@@ -161,12 +166,21 @@ export class BlockchainService {
    * @private
    * @returns {CachedDIDResolver} Cached DID resolver instance
    */
-  createDIDResolver() {
-    const router = new AnyDIDResolver([
-      new DIDKeyResolver(),
-      new CoreResolver(this.modules),
+  createDIDResolver(isBlockchainReady: boolean) {
+    let resolvers = [
       new UniversalResolver(universalResolverUrl),
-    ]);
+      new DIDKeyResolver(),
+    ]
+
+    // Add blockchain resolvers if the blockchain is ready
+    if (isBlockchainReady) {
+      resolvers = [
+        new CoreResolver(this.modules),
+        ...resolvers
+      ]
+    }
+
+    const router = new AnyDIDResolver(resolvers);
 
     return new CachedDIDResolver(router);
   }
@@ -226,7 +240,8 @@ export class BlockchainService {
     }
 
 
-    this.resolver = this.createDIDResolver();
+    // Re-create the resolver with the new blockchain connection
+    this._resolver = this.createDIDResolver(true);
 
     if (
       process.env.NODE_ENV !== 'test' ||