feat(anoncreds): add legacy indy credential format

packages/anoncreds/package.json

@@ -25,9 +25,12 @@
     "test": "jest"
   },
   "dependencies": {
-    "@aries-framework/core": "0.3.3"
+    "@aries-framework/core": "0.3.3",
+    "@aries-framework/node": "0.3.3",
+    "bn.js": "^5.2.1"
   },
   "devDependencies": {
+    "indy-sdk": "^1.16.0-dev-1636",
     "rimraf": "^4.0.7",
     "typescript": "~4.9.4"
   }

packages/anoncreds/src/formats/AnonCredsCredentialFormat.ts

@@ -0,0 +1,89 @@
+import type { AnonCredsCredential, AnonCredsCredentialOffer, AnonCredsCredentialRequest } from '../models'
+import type { CredentialPreviewAttributeOptions, CredentialFormat, LinkedAttachment } from '@aries-framework/core'
+
+/**
+ * This defines the module payload for calling CredentialsApi.createProposal
+ * or CredentialsApi.negotiateOffer
+ */
+export interface AnonCredsProposeCredentialFormat {
+  schemaIssuerId?: string
+  schemaId?: string
+  schemaName?: string
+  schemaVersion?: string
+
+  credentialDefinitionId?: string
+  issuerId?: string
+
+  attributes?: CredentialPreviewAttributeOptions[]
+  linkedAttachments?: LinkedAttachment[]
+
+  // Kept for backwards compatibility
+  schemaIssuerDid?: string
+  issuerDid?: string
+}
+
+/**
+ * This defines the module payload for calling CredentialsApi.acceptProposal
+ */
+export interface AnonCredsAcceptProposalFormat {
+  credentialDefinitionId?: string
+  attributes?: CredentialPreviewAttributeOptions[]
+  linkedAttachments?: LinkedAttachment[]
+}
+
+/**
+ * This defines the module payload for calling CredentialsApi.acceptOffer. No options are available for this
+ * method, so it's an empty object
+ */
+export type AnonCredsAcceptOfferFormat = Record<string, never>
+
+/**
+ * This defines the module payload for calling CredentialsApi.offerCredential
+ * or CredentialsApi.negotiateProposal
+ */
+export interface AnonCredsOfferCredentialFormat {
+  credentialDefinitionId: string
+  attributes: CredentialPreviewAttributeOptions[]
+  linkedAttachments?: LinkedAttachment[]
+}
+
+/**
+ * This defines the module payload for calling CredentialsApi.acceptRequest. No options are available for this
+ * method, so it's an empty object
+ */
+export type AnonCredsAcceptRequestFormat = Record<string, never>
+
+export interface AnonCredsCredentialFormat extends CredentialFormat {
+  formatKey: 'anoncreds'
+  credentialRecordType: 'anoncreds'
+  credentialFormats: {
+    createProposal: AnonCredsProposeCredentialFormat
+    acceptProposal: AnonCredsAcceptProposalFormat
+    createOffer: AnonCredsOfferCredentialFormat
+    acceptOffer: AnonCredsAcceptOfferFormat
+    createRequest: never // cannot start from createRequest
+    acceptRequest: AnonCredsAcceptRequestFormat
+  }
+  // TODO: update to new RFC once available
+  // Format data is based on RFC 0592
+  // https://github.com/hyperledger/aries-rfcs/tree/main/features/0592-indy-attachments
+  formatData: {
+    proposal: {
+      schema_issuer_id?: string
+      schema_name?: string
+      schema_version?: string
+      schema_id?: string
+
+      cred_def_id?: string
+      issuer_id?: string
+
+      // TODO: we don't necessarily need to include these in the AnonCreds Format RFC
+      // as it's a new one and we can just forbid the use of legacy properties
+      schema_issuer_did?: string
+      issuer_did?: string
+    }
+    offer: AnonCredsCredentialOffer
+    request: AnonCredsCredentialRequest
+    credential: AnonCredsCredential
+  }
+}

packages/anoncreds/src/formats/LegacyIndyCredentialFormat.ts

@@ -0,0 +1,67 @@
+import type {
+  AnonCredsAcceptOfferFormat,
+  AnonCredsAcceptProposalFormat,
+  AnonCredsAcceptRequestFormat,
+  AnonCredsOfferCredentialFormat,
+} from './AnonCredsCredentialFormat'
+import type { AnonCredsCredential, AnonCredsCredentialOffer, AnonCredsCredentialRequest } from '../models'
+import type { CredentialPreviewAttributeOptions, CredentialFormat, LinkedAttachment } from '@aries-framework/core'
+
+/**
+ * This defines the module payload for calling CredentialsApi.createProposal
+ * or CredentialsApi.negotiateOffer
+ *
+ * NOTE: This doesn't include the `issuerId` and `schemaIssuerId` properties that are present in the newer format.
+ */
+export interface LegacyIndyProposeCredentialFormat {
+  schemaIssuerDid?: string
+  schemaId?: string
+  schemaName?: string
+  schemaVersion?: string
+
+  credentialDefinitionId?: string
+  issuerDid?: string
+
+  attributes?: CredentialPreviewAttributeOptions[]
+  linkedAttachments?: LinkedAttachment[]
+}
+
+export interface LegacyIndyCredentialRequest extends AnonCredsCredentialRequest {
+  // prover_did is optional in AnonCreds credential request, but required in legacy format
+  prover_did: string
+}
+
+export interface LegacyIndyCredentialFormat extends CredentialFormat {
+  formatKey: 'indy'
+
+  // The stored type is the same as the anoncreds credential service
+  credentialRecordType: 'anoncreds'
+
+  // credential formats are the same as the AnonCreds credential format
+  credentialFormats: {
+    // The createProposal interface is different between the interfaces
+    createProposal: LegacyIndyProposeCredentialFormat
+    acceptProposal: AnonCredsAcceptProposalFormat
+    createOffer: AnonCredsOfferCredentialFormat
+    acceptOffer: AnonCredsAcceptOfferFormat
+    createRequest: never // cannot start from createRequest
+    acceptRequest: AnonCredsAcceptRequestFormat
+  }
+
+  // Format data is based on RFC 0592
+  // https://github.com/hyperledger/aries-rfcs/tree/main/features/0592-indy-attachments
+  formatData: {
+    proposal: {
+      schema_name?: string
+      schema_issuer_did?: string
+      schema_version?: string
+      schema_id?: string
+
+      cred_def_id?: string
+      issuer_did?: string
+    }
+    offer: AnonCredsCredentialOffer
+    request: LegacyIndyCredentialRequest
+    credential: AnonCredsCredential
+  }
+}