Can not sign for input #0 with the key

[tanzile789]

I don't know if creating a P2TR address like this is correct, and it won't be possible to sign in the end.Attached is my code. Could you please help me take a look

const keyPair = ECPair.makeRandom({ network: network });
const p2trSender = bitcoin.payments.p2tr({
pubkey: toXOnly(keyPair.publicKey),
network
});
const psbt = new bitcoin.Psbt({ network: network })
var totalInputValue = 0;
for(var i in utxos){
totalInputValue += utxos[i].satoshi;
psbt.addInput({
hash: utxos[i].txid,
index: utxos[i].vout,
witnessUtxo: {
script: p2trSender.output,
value: utxos[i].satoshi
}
})
}
const changeValue = totalInputValue - receiverAmount - feeSatoshis;
if (changeValue >= 546) {
psbt.addOutput({
address: p2trSender.address,
value: changeValue
})
}
psbt.addOutput({
address: senderAddress,
value: receiverAmount - 100
})
for (let i = 0; i < utxos.length; i++) {
psbt.signInput(i, keyPair);
}
psbt.finalizeAllInputs();
psbt.extractTransaction();

[junderw]

Please check the integration tests and play around with it a bit first.

https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/taproot.spec.ts

Then let me know if you have any questions.

Taproot transactions are done differently compared to non-taproot.

[jasonandjay]

Used for signing, since the output and address are using a tweaked key

We must tweak the signer in the same way.

You can refer to this: https://github.com/bitcoinjs/bitcoinjs-lib/blob/master/test/integration/taproot.spec.ts#L51-L80