support author on nevent.

nip19/nip19.go

@@ -71,6 +71,8 @@ func Decode(bech32string string) (prefix string, value any, err error) {
 				result.ID = hex.EncodeToString(v)
 			case TLVRelay:
 				result.Relays = append(result.Relays, string(v))
+			case TLVAuthor:
+				result.Author = hex.EncodeToString(v)
 			default:
 				// ignore
 			}
@@ -173,10 +175,10 @@ func EncodeProfile(publicKeyHex string, relays []string) (string, error) {
 	return encode("nprofile", bits5)
 }
 
-func EncodeEvent(eventIdHex string, relays []string) (string, error) {
+func EncodeEvent(eventIdHex string, relays []string, author string) (string, error) {
 	buf := &bytes.Buffer{}
 	id, err := hex.DecodeString(eventIdHex)
-	if err != nil {
+	if err != nil || len(id) != 32 {
 		return "", fmt.Errorf("invalid id '%s': %w", eventIdHex, err)
 	}
 	writeTLVEntry(buf, TLVDefault, id)
@@ -185,6 +187,10 @@ func EncodeEvent(eventIdHex string, relays []string) (string, error) {
 		writeTLVEntry(buf, TLVRelay, []byte(url))
 	}
 
+	if pubkey, _ := hex.DecodeString(author); len(pubkey) == 32 {
+		writeTLVEntry(buf, TLVAuthor, pubkey)
+	}
+
 	bits5, err := convertBits(buf.Bytes(), 8, 5, true)
 	if err != nil {
 		return "", fmt.Errorf("failed to convert bits: %w", err)

nip19/nip19_test.go

@@ -169,3 +169,40 @@ func TestDecodeNaddrWithoutRelays(t *testing.T) {
 		t.Error("relays should have been an empty array")
 	}
 }
+
+func TestEncodeDecodeNEventTestEncodeDecodeNEvent(t *testing.T) {
+	nevent, err := EncodeEvent(
+		"45326f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751ac194",
+		[]string{"wss://banana.com"},
+		"7fa56f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751abb88",
+	)
+	if err != nil {
+		t.Errorf("shouldn't error: %s", err)
+	}
+
+	prefix, res, err := Decode(nevent)
+	if err != nil {
+		t.Errorf("shouldn't error: %s", err)
+	}
+
+	if prefix != "nevent" {
+		t.Errorf("should have 'nevent' prefix, not '%s'", prefix)
+	}
+
+	ep, ok := res.(nostr.EventPointer)
+	if !ok {
+		t.Errorf("'%s' should be an nevent, not %v", nevent, res)
+	}
+
+	if ep.Author != "7fa56f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751abb88" {
+		t.Error("wrong author")
+	}
+
+	if ep.ID != "45326f5d6962ab1e3cd424e758c3002b8665f7b0d8dcee9fe9e288d7751ac194" {
+		t.Error("wrong id")
+	}
+
+	if len(ep.Relays) != 1 || ep.Relays[0] != "wss://banana.com" {
+		t.Error("wrong relay")
+	}
+}

pointers.go

@@ -8,6 +8,7 @@ type ProfilePointer struct {
 type EventPointer struct {
 	ID     string
 	Relays []string
+	Author string
 }
 
 type EntityPointer struct {