flywithu/Learning-Bitcoin-from-the-Command-Line
1
1
Fork 0
mirror of https://github.com/ChristopherA/Learning-Bitcoin-from-the-Command-Line.git synced 2025-06-07 16:06:26 +00:00
Code Issues Releases Wiki Activity

Merge pull request #134 from javiervargas/patch-1

Browse Source 
Upload java source file Client.java for Accessing Bitcoind with Java
This commit is contained in:
Shannon Appelcline 2020-06-24 11:20:31 -10:00 committed by GitHub
commit bb712d8a5b
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 118 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

118
src/Client.java Normal file
View File

@ -0,0 +1,118 @@
import java.math.*;
import java.nio.ByteBuffer;
import javax.xml.bind.DatatypeConverter;
import java.util.Hashtable;
import java.util.Enumeration;
import java.math.BigDecimal;
import wf.bitcoin.javabitcoindrpcclient.BitcoinJSONRPCClient;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.SignedRawTransaction;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.AddressInfo;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.RawTransactionSigningOrVerificationError;
import wf.bitcoin.javabitcoindrpcclient.*;
import wf.bitcoin.krotjson.HexCoder;
import java.text.DecimalFormat;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.Unspent;
import wf.bitcoin.javabitcoindrpcclient.BitcoinRawTxBuilder;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.Transaction;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.ExtendedTxInput;
import wf.bitcoin.javabitcoindrpcclient.BitcoindRpcClient.TxInput;
import java.util.ListIterator;
import java.net.URL;
import java.net.MalformedURLException;
import java.util.List;
import java.io.*;
import java.util.*;
public class Client{
static BitcoinJSONRPCClient bitcoinClient = null;
static BitcoinRawTxBuilder txb = null;
static String address = "";
public boolean connect(){
String user = "user";
String password = "password";
String host = "127.0.0.1";
String port = "18443"; //regtest
// String host = "192.168.0.22"; //testnet
// String port = "18332"; //testnet
try {
URL url = new URL("http://" + user + ':' + password + "@" + host + ":" + port + "/");
bitcoinClient = new BitcoinJSONRPCClient(url);
return true;
}catch (MalformedURLException e) {
e.printStackTrace();
return false;
}
}
public static void main(String args[]){
BigDecimal txToAddr2Amount = new BigDecimal("0");
BigDecimal estimatedFee = BigDecimal.valueOf(0.00000200);
Client rpcClient = new Client();
bitcoin.connect();
LinkedList<BitcoindRpcClient.ExtendedTxInput> inputList = new LinkedList<BitcoindRpcClient.ExtendedTxInput>();
txb = new BitcoinRawTxBuilder(bitcoinClient);
// String addr1 = bitcoinClient.getNewAddress();
String addr1 = "bcrt1qs4ylwj2v5v0gq7eqzp9k9vxazdrkexhkghxpyp"; //regtest
AddressInfo addr1Info = bitcoinClient.getAddressInfo(addr1);
System.out.println("Address: " + addr1Info.address());
System.out.println("HdKeyPath: " + addr1Info.hdKeyPath());
System.out.println("PubKey: " + addr1Info.pubKey());
System.out.println("MasterFingerPrint: " + addr1Info.hdMasterFingerprint());
System.out.println("Balance: " + bitcoinClient.getBalance());
// String addr1 = "tb1qrj3dgs6kh2mtr7ulgmlx3pvavqwtw6vxdk468y"; //testnet
System.out.println("Created address addr1: " + addr1);
String addr2 = bitcoinClient.getNewAddress();
System.out.println("Created address addr2: " + addr2);
List<String> generatedBlocksHashes = bitcoinClient.generateToAddress(110, addr1);
System.out.println("Generated " + generatedBlocksHashes.size() + " blocks for addr1");
List<Unspent> utxos = bitcoinClient.listUnspent(0, Integer.MAX_VALUE, addr1);
System.out.println("Found " + utxos.size() + " UTXOs (unspent transaction outputs) belonging to addr1");
/*for(int i =0;i<utxos.size();i++) {
Unspent selectedUtxo = utxos.get(i);
System.out.println("Selected UTXO which will be sent from addr1 to addr2: " + selectedUtxo);
System.out.println("txid:" + selectedUtxo.txid());
System.out.println("vout:" + selectedUtxo.vout());
System.out.println("scriptPubKey:" + selectedUtxo.scriptPubKey());
System.out.println("amount:" + selectedUtxo.amount());
BigDecimal estimatedFee = BigDecimal.valueOf(0.00000200);
txToAddr2Amount = selectedUtxo.amount().subtract(estimatedFee);
}*/
TxInput in = utxos.get(0);
txb.in(in);
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);
String unsignedRawTxHex = txb.create();
System.out.println("Created unsignedRawTx from addr1 to addr2: " + unsignedRawTxHex);
SignedRawTransaction srTx = bitcoinClient.signRawTransactionWithKey(
unsignedRawTxHex,
Arrays.asList(bitcoinClient.dumpPrivKey(addr1)),
Arrays.asList(in),
null);
System.out.println("signedRawTx hex: " + srTx.hex());
System.out.println("signedRawTx complete: " + srTx.complete());
List<RawTransactionSigningOrVerificationError> errors = srTx.errors();
if (errors != null)
{
System.out.println("Found errors when signing");
for (RawTransactionSigningOrVerificationError error : errors)
{
System.out.println("Error: " + error);
}
}
String sentRawTransactionID = bitcoinClient.sendRawTransaction(srTx.hex());
System.out.println("Sent signedRawTx (txID): " + sentRawTransactionID);
}
}