TransactionRequest(String nodeId, long txId, boolean hold, long checkChannelID) { this.nodeId = nodeId;  this.txId= txId;  this.hold = hold;  this.checkChannelID = checkChannelID;
TransactionRequest() {
   TransactionRequest(String nodeId, long txId, boolean hold, long checkChannelID)   {      this.nodeId = nodeId;            this.txId= txId;      this.hold = hold;            this.checkChannelID = checkChannelID;   }