feat: policy.from

.gitignore

@@ -0,0 +1 @@
+.idea/

types.go

@@ -99,6 +99,7 @@ func (f *ForField) UnmarshalJSON(data []byte) error {
 type Policy struct {
 	Type                   string   `json:"@type"`
 	Context                any      `json:"@context,omitempty"`
+	From                   string   `json:"from,omitempty"`
 	FromAgent              string   `json:"fromAgent,omitempty"`
 	FromRole               string   `json:"fromRole,omitempty"`
 	AboutParty             string   `json:"aboutParty,omitempty"`

types_test.go

@@ -1,6 +1,7 @@
 package tap
 
 import (
+	"bytes"
 	"encoding/json"
 	"testing"
 )
@@ -137,6 +138,24 @@ func TestPolicy_JSONRoundTrip(t *testing.T) {
 	}
 }
 
+func TestPolicy_FromFieldRoundTrip(t *testing.T) {
+	in := Policy{Type: "RequireAuthorization", From: "did:web:vasp.example"}
+	data, err := json.Marshal(in)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+	if !bytes.Contains(data, []byte(`"from":"did:web:vasp.example"`)) {
+		t.Fatalf("missing from in JSON: %s", string(data))
+	}
+	var out Policy
+	if err := json.Unmarshal(data, &out); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+	if out.From != in.From {
+		t.Errorf("From = %q, want %q", out.From, in.From)
+	}
+}
+
 func TestTransactionConstraints_JSONRoundTrip(t *testing.T) {
 	tc := TransactionConstraints{
 		Purposes:         []string{"BEXP", "SUPP"},