fix: SD-JWT V5 create presentation for arrays (#56)

* fix: presentation digest

* chore: rev

* feat: distinct values

* feat: extract by key

* feat: digest

* fix: lint

presexch/definition.go

@@ -1116,7 +1116,22 @@ func getLimitedDisclosures(constraints *Constraints, displaySrc []byte, credenti
 				return nil, err
 			}
 
-			for _, dc := range credential.SDJWTDisclosures() {
+			disclosures := credential.SDJWTDisclosures()
+			disclosuresMap := map[string]*common.DisclosureClaim{}
+
+			for _, dc := range disclosures {
+				disclosuresMap[dc.Digest] = dc
+			}
+
+			arrayElements := ExtractArrayValuesForSDJWTV5(parentObj)
+			for _, elem := range arrayElements {
+				dis, disOk := disclosuresMap[elem]
+				if disOk {
+					limitedDisclosures = append(limitedDisclosures, dis)
+				}
+			}
+
+			for _, dc := range disclosures {
 				if dc.Name == key {
 					digest, err := common.GetHash(*credentialContents.SDJWTHashAlg, dc.Disclosure)
 					if err != nil {
@@ -1134,6 +1149,30 @@ func getLimitedDisclosures(constraints *Constraints, displaySrc []byte, credenti
 	return limitedDisclosures, nil
 }
 
+// ExtractArrayValuesForSDJWTV5 extracts array values for SD JWT V5.
+func ExtractArrayValuesForSDJWTV5(obj map[string]interface{}) []string {
+	var extractedValues []string
+
+	for key, v := range obj {
+		switch val := v.(type) {
+		case string:
+			if key == "..." {
+				extractedValues = append(extractedValues, val)
+			}
+		case map[string]interface{}:
+			extractedValues = append(extractedValues, ExtractArrayValuesForSDJWTV5(val)...)
+		case []interface{}:
+			for _, valData := range val {
+				if d1, ok1 := valData.(map[string]interface{}); ok1 {
+					extractedValues = append(extractedValues, ExtractArrayValuesForSDJWTV5(d1)...)
+				}
+			}
+		}
+	}
+
+	return extractedValues
+}
+
 func frameCreds(frame map[string]interface{}, creds []*verifiable.Credential,
 	sdBBSProofCreator *verifiable.BBSProofCreator,
 	opts ...verifiable.CredentialOpt) ([]*verifiable.Credential, error) {

presexch/definition_test.go

@@ -2361,6 +2361,36 @@ func TestPresentationDefinition_CreateVPArray(t *testing.T) {
 	})
 }
 
+func TestExtractExtraFields(t *testing.T) {
+	results := ExtractArrayValuesForSDJWTV5(map[string]interface{}{
+		"_sd": []interface{}{
+			"k1NxQSAyCCHlGw-93hxPzOFqUY4Ye7gLqLiKMkSZfHLa48Sevxr5zGHS6Yrb3arK",
+			"wu3GHwpa1pJaIv2U71-Y_9kdzjBxlZYRVOG03SIqrOMuytclBPOAU1FSlAnEgOzh",
+		},
+		"type": []interface{}{
+			map[string]interface{}{
+				"...": "mhV9Kt70m-8slbu1TgIpdr6_AWO-kG51Q2amF3w9qQyyxM-aXsTn77uxMBAnFM67",
+			},
+		},
+		"someObject": map[string]interface{}{
+			"nested": map[string]interface{}{
+				"nested2": map[string]interface{}{
+					"type": []interface{}{
+						map[string]interface{}{
+							"...": "xxx",
+						},
+					},
+				},
+			},
+		},
+	})
+
+	require.EqualValues(t, []string{
+		"mhV9Kt70m-8slbu1TgIpdr6_AWO-kG51Q2amF3w9qQyyxM-aXsTn77uxMBAnFM67",
+		"xxx",
+	}, results)
+}
+
 func getTestVCWithContext(t *testing.T, issuerID string, ctx []string) *verifiable.Credential {
 	subjectJSON := map[string]interface{}{
 		"id":           uuid.New().String(),