feat: Add DIF presentation exchange context.

Author: peacekeeper

src/main/java/com/danubetech/verifiablecredentials/jsonld/VerifiableCredentialContexts.java

@@ -19,6 +19,7 @@ public class VerifiableCredentialContexts {
     public static final URI JSONLD_CONTEXT_W3C_NS_ODRL = URI.create("https://www.w3.org/ns/odrl.jsonld");
     public static final URI JSONLD_CONTEXT_DANUBETECH_2020_CREDENTIALS_V1 = URI.create("https://danubetech.com/2020/credentials/v1");
     public static final URI JSONLD_CONTEXT_W3ID_VC_REVOCATION_LIST_2020_V1 = URI.create("https://w3id.org/vc-revocation-list-2020/v1");
+    public static final URI JSONLD_CONTEXT_DIF_PRESENTATION_EXCHANGE_SUBMISSIONS_V1 = URI.create("https://identity.foundation/presentation-exchange/submission/v1");
 
     public static final Map<URI, JsonDocument> CONTEXTS;
     public static final DocumentLoader DOCUMENT_LOADER;
@@ -43,6 +44,8 @@ public class VerifiableCredentialContexts {
                     JsonDocument.of(MediaType.JSON_LD, VerifiableCredentialContexts.class.getResourceAsStream("danubetech-v1.jsonld")));
             CONTEXTS.put(JSONLD_CONTEXT_W3ID_VC_REVOCATION_LIST_2020_V1,
                     JsonDocument.of(MediaType.JSON_LD, VerifiableCredentialContexts.class.getResourceAsStream("vc-revocation-list-2020-v1.jsonld")));
+            CONTEXTS.put(JSONLD_CONTEXT_DIF_PRESENTATION_EXCHANGE_SUBMISSIONS_V1,
+                    JsonDocument.of(MediaType.JSON_LD, VerifiableCredentialContexts.class.getResourceAsStream("presentation-exchange-submissions-v1.jsonld")));
 
             for (Map.Entry<URI, JsonDocument> context : CONTEXTS.entrySet()) {
                 context.getValue().setDocumentUrl(context.getKey());

src/main/resources/com/danubetech/verifiablecredentials/jsonld/presentation-exchange-submissions-v1.jsonld

@@ -0,0 +1,15 @@
+{
+  "@context": {
+    "@version": 1.1,
+    "PresentationSubmission": {
+      "@id": "https://identity.foundation/presentation-exchange/#presentation-submission",
+      "@context": {
+        "@version": 1.1,
+        "presentation_submission": {
+          "@id": "https://identity.foundation/presentation-exchange/#presentation-submission",
+          "@type": "@json"
+        }
+      }
+    }
+  }
+}