Initial RBF and DLCs

Author: 22388o

src/bitcoin/rbf.js

@@ -0,0 +1,34 @@
+const bitcoin = require('bitcoinjs-lib');
+const bip65 = require('bip65');
+
+// DLC setup
+const oraclePublicKey = Buffer.from('...', 'hex'); // Oracle's public key
+const counterpartiesPublicKeys = [
+    Buffer.from('...', 'hex'), // Counterparty 1's public key
+    Buffer.from('...', 'hex')  // Counterparty 2's public key
+];
+const outcomeHash = Buffer.from('...', 'hex'); // Outcome's hash
+const fundingTransactionOutput = 'txid:vout'; // Funding transaction's output
+
+// RBF setup
+const locktime = bip65.encode({ utc: 0 }); // Use a locktime that allows RBF
+
+// Create the DLC contract
+const dlcContract = bitcoin.payments.embed({ data: [outcomeHash] });
+
+// Create the transaction
+const tx = new bitcoin.TransactionBuilder();
+tx.addInput(fundingTransactionOutput, 0);
+tx.addOutput(dlcContract.output, 0); // DLC output
+tx.locktime = locktime;
+tx.enableRBF(); // Enable RBF
+
+// Sign the transaction
+tx.sign(0, oraclePublicKey);
+counterpartiesPublicKeys.forEach((publicKey) => {
+    tx.sign(0, publicKey);
+});
+
+// Finalize the transaction
+const finalTx = tx.build();
+console.log(finalTx.toHex());