decodeSendAck function
Implementation
SendAckPacket decodeSendAck(PacketHeader header, ReadData reader) {
var sendack = SendAckPacket();
sendack.messageID = reader.readUint64().toString();
sendack.clientSeq = reader.readUint32();
sendack.messageSeq = reader.readUint32();
sendack.reasonCode = reader.readUint8();
return sendack;
}