Break out encodeMessageA

metadapta.go

@@ -79,16 +79,7 @@ func (this *a) unlistTransactionSafe(id int64) {
 func (this *a) sendMessageSafe(trans int64, method uint16, data []byte) error {
 	this.sendLock.Lock()
 	defer this.sendLock.Lock()
-	
-	buffer := make([]byte, 8 + len(data))
-	tape.EncodeI64(buffer[:4], trans)
-	tape.EncodeI16(buffer[4:6], method)
-	length, ok := tape.U16CastSafe(len(data))
-	if !ok { return ErrPayloadTooLarge }
-	tape.EncodeI16(data[6:8], length)
-	copy(buffer[8:], data)
-	_, err := this.underlying.Write(buffer)
-	return err
+	return encodeMessageA(this.underlying, trans, method, data)
 }
 
 func (this *a) receive() {
@@ -198,6 +189,18 @@ func decodeMessageA(reader io.Reader) (int64, uint16, []byte, error) {
 	return transID, method, payloadBuffer, nil
 }
 
+func encodeMessageA(writer io.Writer, trans int64, method uint16, data []byte) error {
+	buffer := make([]byte, 8 + len(data))
+	tape.EncodeI64(buffer[:4], trans)
+	tape.EncodeI16(buffer[4:6], method)
+	length, ok := tape.U16CastSafe(len(data))
+	if !ok { return ErrPayloadTooLarge }
+	tape.EncodeI16(data[6:8], length)
+	copy(buffer[8:], data)
+	_, err := writer.Write(buffer)
+	return err
+}
+
 func partyFromTransID(id int64) Party {
 	return id > 0
 }