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Create 17_2_App-sendtx.java

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Shannon Appelcline 2020-09-02 12:45:51 -10:00 committed by GitHub
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package com.blockchaincommons.lbtc;
import java.math.BigDecimal;
import java.util.*;
import wf.bitcoin.javabitcoindrpcclient.BitcoinJSONRPCClient;
import wf.bitcoin.javabitcoindrpcclient.BitcoinRawTxBuilder;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.*;
public class App
{
public static void main( String[] args ) throws Exception
{
BitcoindRpcClient rpcClient = new BitcoinJSONRPCClient("http://StandUp:6305f1b2dbb3bc5a16cd0f4aac7e1eba@localhost:18332");
/* 1. Prepare two address */
/* Use an address on your system with UTXOs */
String addr1 = "tb1qdqkc3430rexxlgnma6p7clly33s6jjgay5q8np";
System.out.println("Used address addr1: " + addr1);
String addr2 = rpcClient.getNewAddress();
System.out.println("Created address addr2: " + addr2);
/* 2. Find a UTXO */
List<Unspent> utxos = rpcClient.listUnspent(0, Integer.MAX_VALUE, addr1);
System.out.println("Found " + utxos.size() + " UTXOs (unspent transaction outputs) belonging to addr1");
/* 3. Create a Transaction */
BitcoinRawTxBuilder txb = new BitcoinRawTxBuilder(rpcClient);
/* 3.1 Fill the Input */
TxInput in = utxos.get(0);
txb.in(in);
/* 3.2 Fill the Output */
BigDecimal estimatedFee = BigDecimal.valueOf(0.00000200);
BigDecimal txToAddr2Amount = utxos.get(0).amount().subtract(estimatedFee);
txb.out(addr2, txToAddr2Amount);
System.out.println("unsignedRawTx in amount: " + utxos.get(0).amount());
System.out.println("unsignedRawTx out amount: " + txToAddr2Amount);
/* 4. Sign the Transaction */
String unsignedRawTxHex = txb.create();
System.out.println("Created unsignedRawTx from addr1 to addr2: " + unsignedRawTxHex);
SignedRawTransaction srTx = rpcClient.signRawTransactionWithKey(
unsignedRawTxHex,
Arrays.asList(rpcClient.dumpPrivKey(addr1)),
Arrays.asList(in),
null);
System.out.println("signedRawTx hex: " + srTx.hex());
System.out.println("signedRawTx complete: " + srTx.complete());
/* 5. Send the Transaction */
String sentRawTransactionID = rpcClient.sendRawTransaction(srTx.hex());
System.out.println("Sent signedRawTx (txID): " + sentRawTransactionID);
}
}