Can't sign the taproot PSBT with the leafKey

I tried to make two transactions, the Tx1 I have made is a taproot output. I wanted to create second Tx2 to use the output Tx1. But I always couldn't sign the PSBT. If you can help me, thank you very much. Here are my codes.

import bitcoin, { script } from 'bitcoinjs-lib';
import { ECPairFactory } from 'ecpair'
import ecc from '@bitcoinerlab/secp256k1';
const { networks } = bitcoin;
import path from 'path';
import fs from 'fs'; // 添加文件系统模块
import crypto from 'crypto'; // 引入crypto模块生成随机数
import { toXOnly, tapTreeToList } from 'bitcoinjs-lib/src/psbt/bip371.js';
// 添加 BIP32 模块
import BIP32Factory from 'bip32';
import * as tools from 'uint8array-tools';



// 正确初始化 ECC 库
bitcoin.initEccLib(ecc);
// 初始化 ECPair
const ECPair = ECPairFactory(ecc);
// 初始化 BIP32
const bip32 = BIP32Factory(ecc); // 使用 ECC 库初始化 bip32
// 配置为测试网
const network = networks.testnet;
// 定义随机数生成函数
const rng = () => crypto.randomBytes(64);

const privateKeyWIF = '';// 2Ms...
const privateKeyPair = ECPair.fromWIF(privateKeyWIF, network);

// 生成密钥
const internalKey = bip32.fromSeed(rng(), network);// for key path
const leafKey = bip32.fromSeed(rng(), network);// for script path

const leafXOnlyPubkey = toXOnly(leafKey.publicKey);

console.log('XOnly Pubkey of leafKey: ',leafXOnlyPubkey);
console.log('tools.toHex(leafECPair.publicKey) ',tools.toHex(leafXOnlyPubkey));


const str = 'today is May 16th in 2025';// 构造要插入的数据
const data = Buffer.from(str,'utf8');

const leafScript = bitcoin.script.compile([
  Buffer.from(tools.toHex(leafXOnlyPubkey)),
  bitcoin.opcodes.OP_CHECKSIG,
  bitcoin.opcodes.OP_0,
  bitcoin.opcodes.OP_IF,
    data,
  bitcoin.opcodes.OP_ENDIF
]);



const scriptTree = [
    {
        output: bitcoin.script.fromASM(
                    '0238f2a4a57b510431bb835d9e46e1c946190a084828521195f77aa23c7efb438c OP_CHECKSIG',
                  ),
    },
    {
        output: leafScript,
    },
];
// ???
const redeem = {
      output: leafScript,
      redeemVersion: 192, // LEAF_VERSION_TAPSCRIPT = 192
    };

// 创建一个taproot的p2tr对象
console.log('toXonly the internalKey.publicKey :',toXOnly(internalKey.publicKey))
const p2trObject = bitcoin.payments.p2tr({
    internalPubkey: Buffer.from(toXOnly(internalKey.publicKey)),
    scriptTree,
    redeem:{output: leafScript, redeemVersion: 192 },// LEAF_VERSION_TAPSCRIPT = 192
    network: network,
})

console.log('Taproot Address:',p2trObject.address);

//=========create the 1st Tx1================
const txid = 'b8433aa5addd2a0d715a5b720b661088cd77e14b9e7862dd7117040415390523';
const vout = 0; // 确认UTXO的vout索引
const privateKey = '';// 2Ms...
const redeemScriptHex = '00148d07de8df8f6c64ce9ef542f9e32b6d8517aac3f'; // 例如：'522102...ae'
// const redeemScriptHex = '00147b0e1b7b4e0c2d4d0d7b2f6ce0d5ca4e7f4ed38e'; // 例如：'522102...ae'
const scriptPubKey = 'a914011beb6fb8499e075a57027fb0a58384f2d3f78487';
const utxoValue = 39062500; // UTXO的金额（satoshis）
const fee = 1000; // 手续费（satoshis）

const psbt1 = new bitcoin.Psbt({ network });
// 添加输入
psbt1.addInput({
    hash: txid,
    index: vout,
    witnessUtxo: {
      script: Buffer.from(scriptPubKey, 'hex'), // 
      value: utxoValue,
    },
    redeemScript: Buffer.from(redeemScriptHex, 'hex'),
});

// 添加输出
// console.log('internalKey.publicKey is :',internalKey.publicKey);*** Unit8Array(32)***
// console.log('Buffer from internalKey.publicKey is :',Buffer.from(internalKey.publicKey));  ***Unit8Array(32)***

psbt1.addOutput({
    address: p2trObject.address,
    value: utxoValue - fee, // 扣除手续费
    tapInternalKey: Buffer.from(toXOnly(internalKey.publicKey)),
    tapTree: {leaves:tapTreeToList(scriptTree)},
  });

console.log('privateKeyPair :',privateKeyPair);


// psbt1.signInput(0,privateKeyPair);
psbt1.signInput(0, {
  publicKey: Buffer.from(privateKeyPair.publicKey),
  sign: (hash) => {
      const signature = privateKeyPair.sign(hash);
      return Buffer.from(signature); 
  },
});

psbt1.finalizeInput(0);
const tx1 = psbt1.extractTransaction();
// get rawTransaction
const rawTx1 = tx1.toBuffer();
const hex1 = tools.toHex(rawTx1);
console.log('第一个交易是：',hex1);
// get txid
const txid1 = tx1.getId();
console.log('第一个交易的 txid 是：', txid1);


const amount = 39061500;// 39062500 - 1000
const sendAmount = amount - fee;
// ===================== create the 2nd Tx2 ================
const psbt2 = new bitcoin.Psbt({network});
// 添加输入
psbt2.addInput({
    hash: txid1,
    index: 0,
    witnessUtxo: { value: amount, script: p2trObject.output},
})
console.log('psbt2 added Input,psbt2 :',psbt2);
psbt2.updateInput(0, {
    tapLeafScript: [
      {
        leafVersion: redeem.redeemVersion,
        script: redeem.output,
        controlBlock: p2trObject.witness[p2trObject.witness.length - 1],
      },
    ],
  });
console.log('psbt2 updated Input,psbt2 :',psbt2)

// 创建输出的taproot地址
const sendInternalKey = bip32.fromSeed(rng(), network);

const { address: sendAddress } = bitcoin.payments.p2tr({
        internalPubkey: Buffer.from(toXOnly(sendInternalKey.publicKey)),
        scriptTree,
        network: network,
      });
// 添加输出
psbt2.addOutput({
      value: sendAmount,
      address: sendAddress,
      tapInternalKey: Buffer.from(toXOnly(sendInternalKey.publicKey)),
      tapTree: {leaves: tapTreeToList(scriptTree)},
    });


// !!!!!!!
psbt2.signInput(0, leafKey);// always wrong!!!
// !!!!!!!

then the problem may be about the key. The error is :

 throw new Error(
            ^

Error: Can not sign for input #0 with the key 2,124,105,49,150,91,89,124,2,240,145,242,150,205,131,44,59,194,222,169,8,8,246,81,238,28,73,195,177,158,148,9,79
    at Psbt.checkTaprootHashesForSig (C:\Users\sheng.wang01\personal_doc\network_python\scripts\bitcoinjs\node_modules\bitcoinjs-lib\src\psbt.js:854:13)
    at Psbt._signTaprootInput (C:\Users\sheng.wang01\personal_doc\network_python\scripts\bitcoinjs\node_modules\bitcoinjs-lib\src\psbt.js:692:31)
    at Psbt.signInput (C:\Users\sheng.wang01\personal_doc\network_python\scripts\bitcoinjs\node_modules\bitcoinjs-lib\src\psbt.js:640:19)


from Recent Questions - Bitcoin Stack Exchange https://ift.tt/fgCorFz
via IFTTT

Popular posts from this blog

Future of Bitcoin encryption and security in a QC era

How will the advancement of quantum computing impact the security of Bitcoin, and what steps are necessary to protect the network from this emerging threat? What role could lattice-based encryption play in safeguarding Bitcoin, and which of the current algorithms are best suited for this purpose? How would the implementation of such encryption technology be integrated into the existing Bitcoin infrastructure, and what challenges might arise during this process? What happens to existing addresses that rely on elliptic curve cryptography? Is there a way to seamlessly transition old addresses to the new system, or would users need to actively transfer their funds to new, more secure addresses? How could such a transition be designed to ensure user security while maintaining trust in the network? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/aZeY2fo via IFTTT
Read more

Possible rollback due to lazy reveal in BRC20?

Let's assume user A committed an inscription with {"op":"deploy", "tick": "test"} at block 100 (without revealing it yet). Then user B commits and reveals the exact same inscription at block 101. Because the indexer isn't aware that A's earlier commit was actually for "test," it recognizes B's "test" token as the official one. From blocks 101 to 199, users freely perform various "test" token transactions (e.g., "mint" , "transfer" ). However, at block 200, user A finally reveals their earlier commit. In that case, will the indexer roll back all "test"-related histories that happened between blocks 101 and 199? If so, can we really trust that all BRC20 tokens recognized by the indexer are "safely" the official ones? from Recent Questions - Bitcoin Stack Exchange https://ift.tt/CsYKVTa via IFTTT
Read more

A way to recover scammed Bitcoin investment

I have learned the hard way that even the most seasoned investors can fall prey to malicious actors. When my Investment was stolen, I felt a sense of betrayal and anger. But then, I discovered this FINANCE TEAM, and their professionalism and unwavering commitment gave me a renewed sense of confidence. From the moment I reached out to this Finance Team, I was impressed by their attention to detail and their deep understanding of the Stock and real estate ecosystem. They listened patiently to my story and carefully analyzed the transaction history, leaving no stone unturned in their investigation. Throughout the recovery process, This Finance Teamkept me informed of their progress, providing me with regular updates and answering my countless questions with patience and understanding. Their unwavering dedication and determination gave me a sense of hope during a time of great uncertainty. To my astonishment, This Finance Team was able to recover a significant portion of my stolen Investme...
Read more