Add coinswap

src/app/coinjoin/coinswap.jsx

@@ -0,0 +1,80 @@
+const {UTXOs, Address, Radom, Payments} = require('bitcoinjs-lib');
+const firebolt = require('main_function');
+const axios = require('axios');
+
+// Bitcoin network configuration
+const network = bitcoin.networks.testnet;
+
+// Generate a new Bitcoin address
+function generateAddress() {
+  const keyPair = bitcoin.ECPair.makeRandom({ network });
+  const { address } = bitcoin.payments.p2tr({ pubkey: keyPair.publicKey, network });
+
+  return { address, privateKey: keyPair.toWIF() };
+}
+
+// Fetch unspent transaction outputs (UTXOs) for an address
+async function getUTXOs(address) {
+  const response = await axios.get(`https://api.blockcypher.com/v1/btc/test3/addrs/${address}/full`);
+  return response.data.txrefs.filter(utxo => utxo.spent === false);
+}
+
+// Create and sign the swap transaction
+async function createSwapTransaction(inputAddress, outputAddress, amount, fee) {
+  const utxos = await getUTXOs(inputAddress);
+  const keyPair = bitcoin.ECPair.fromWIF(inputAddress.privateKey, network);
+
+  const txb = new bitcoin.TransactionBuilder(network);
+  let totalInput = 0;
+
+  for (const utxo of utxos) {
+    txb.addInput(utxo.tx_hash, utxo.tx_output_n);
+    totalInput += utxo.value;
+  }
+
+  const totalOutput = amount + fee;
+  txb.addOutput(outputAddress, amount);
+  txb.addOutput(inputAddress.address, totalInput - totalOutput);
+
+  for (let i = 0; i < utxos.length; i++) {
+    txb.sign(i, keyPair);
+  }
+
+  const tx = txb.build().toHex();
+  return tx;
+}
+
+// Broadcast the transaction to the Bitcoin network
+async function broadcastTransaction(transaction) {
+  try {
+    const response = await axios.post('https://api.blockcypher.com/v1/btc/test3/txs/push', {
+      tx: transaction,
+    });
+    console.log('Transaction broadcasted:', response.data.tx.hash);
+  } catch (error) {
+    console.error('Error broadcasting transaction:', error.response.data);
+  }
+}
+
+// Example usage
+async function run() {
+  // Generate a new Bitcoin address
+  const inputAddress = generateAddress();
+  console.log('Input Address:', inputAddress.address);
+
+  // Destination address for swapped coins
+  const outputAddress = 'YOUR_OUTPUT_ADDRESS';
+
+  // Amount and fee for the swap transaction
+  const amount = 0.01;
+  const fee = 0.0001;
+
+  // Create and sign the swap transaction
+  const transaction = await createSwapTransaction(inputAddress, outputAddress, amount, fee);
+  console.log('Swap Transaction:', transaction);
+
+  // Broadcast the transaction
+  await broadcastTransaction(transaction);
+}
+
+run().catch(console.error);