i experimented a lot with p2wsh multisig configurations with bitcoinjs-lib
. but when i tried to sign a standard native segwit p2wpkh to p2wpkh transaction everything goes ok except for bitcoin-cli sendrawtransaction
. it says
non-mandatory-script-verify-flag (Signature must be zero for failed CHECK(MULTI)SIG operation)
js code (./btc
is here, the rest can be npm install
ed):
const { btc, send, listunspent, getnewaddress, bech32toScriptPubKey } = require('./btc')();
const bitcoin = require('bitcoinjs-lib');
const network = bitcoin.networks.testnet;
const hashtype = bitcoin.Transaction.SIGHASH_ALL;
const ECPair = require('ecpair').ECPairFactory(require('tiny-secp256k1'));
const readline = require('readline');
const rl = readline.createInterface({
input: process.stdin,
output: process.stdout
});
rl.on('close', () => process.exit(0));
const input = q => new Promise(r => rl.question(q, r));
main();
async function main() {
const u = (await listunspent(0, 0, true)).filter(x => x.solvable && x.spendable && x.desc.startsWith('wpkh'));
console.log(u);
const v = await input('Which input to use? ');
const utxo = u[parseInt(v)];
if (!utxo) {
console.log('error');
process.exit(1);
}
var out = await input('Output address (leave empty to generate a new one) ');
if (out.length == 0) {
out = await getnewaddress();
}
if (out.length != 42) {
console.log('p2wpkh addresses are 42 chars long');
process.exit(1);
}
const ecpair = ECPair.fromWIF(await btc('dumpprivkey', utxo.address), network);
const tx = new bitcoin.Transaction(network);
tx.addInput(Buffer.from(utxo.txid, 'hex').reverse(), utxo.vout);
const fee = 110;
tx.addOutput(bech32toScriptPubKey(out), utxo.amount - fee);
const sighash = tx.hashForWitnessV0(
0, Buffer.from(utxo.scriptPubKey, 'hex'), utxo.amount, hashtype
);
tx.setWitness(0, [
bitcoin.script.signature.encode(ecpair.sign(sighash), hashtype),
ecpair.publicKey
]);
console.log(tx.toHex());
console.log(await send(tx.toHex()));
}
TX hex
01000000000101c690a8157bb45506b15173a3175bd3504182cf8c91f916235522522a3d1a28280100000000ffffffff01d2410f00000000001600149b959b78f09b7f7976391fd20aad3835b738e0c3024730440220120a950d96210c48a6831e7ee7f746e6119183d8512b10a6b14c60509556bba3022042359f1699e9cfb90637647ecb085e262736dc5ad9c076666cb44c29c20baafc0121027b612527ff9e157b80dd2ddac0e11555afcd517a7a425c27e5c7afbad889528e00000000
i think i am making a mistake in what must be included in the sighash. What scriptPubKey
is used in the sighash of a p2wpkh?