feat: added setDefaultTokenEndpoint to VcIssuerBuilder

Author: sksadjad

packages/issuer-rest/lib/oid4vci-api-functions.ts

@@ -2,7 +2,6 @@ import {
   ACCESS_TOKEN_ISSUER_REQUIRED_ERROR,
   adjustUrl,
   AuthorizationRequest,
-  CredentialIssuerMetadataOpts,
   CredentialOfferRESTRequest,
   CredentialRequestV1_0_11,
   determineGrantTypes,
@@ -380,16 +379,9 @@ export function pushedAuthorizationEndpoint<DIDDoc extends object>(
   })
 }
 
-function addTokenEndpoint(issuerMetadata: CredentialIssuerMetadataOpts) {
-  if (!issuerMetadata.token_endpoint) {
-    issuerMetadata.token_endpoint = `${issuerMetadata.credential_issuer}/token`
-  }
-}
-
 export function getMetadataEndpoint<DIDDoc extends object>(router: Router, issuer: VcIssuer<DIDDoc>) {
   const path = `/.well-known/openid-credential-issuer`
   router.get(path, (request: Request, response: Response) => {
-    addTokenEndpoint(issuer.issuerMetadata)
     return response.send(issuer.issuerMetadata)
   })
 }

packages/issuer/lib/builder/VcIssuerBuilder.ts

@@ -145,6 +145,12 @@ export class VcIssuerBuilder<DIDDoc extends object> {
     return this
   }
 
+  private setDefaultTokenEndpoint(issuerMetadata: Partial<CredentialIssuerMetadata>) {
+    if (!issuerMetadata.token_endpoint) {
+      issuerMetadata.token_endpoint = `${issuerMetadata.credential_issuer}/token`
+    }
+  }
+
   public build(): VcIssuer<DIDDoc> {
     if (!this.credentialOfferStateManager) {
       throw new Error(TokenErrorResponse.invalid_request)
@@ -155,6 +161,7 @@ export class VcIssuerBuilder<DIDDoc extends object> {
 
     const builder = this.issuerMetadataBuilder?.build()
     const metadata: Partial<CredentialIssuerMetadata> = { ...this.issuerMetadata, ...builder }
+    this.setDefaultTokenEndpoint(metadata)
     // Let's make sure these get merged correctly:
     metadata.credentials_supported = [...(this.issuerMetadata.credentials_supported ?? []), ...(builder?.credentials_supported ?? [])]
     metadata.display = [...(this.issuerMetadata.display ?? []), ...(builder?.display ?? [])]