@tomo-inc/ledger-bitcoin-babylon
Version:
Ledger Hardware Wallet Babylon Application Client
94 lines • 7.58 kB
JavaScript
;
var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
var desc = Object.getOwnPropertyDescriptor(m, k);
if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
desc = { enumerable: true, get: function() { return m[k]; } };
}
Object.defineProperty(o, k2, desc);
}) : (function(o, m, k, k2) {
if (k2 === undefined) k2 = k;
o[k2] = m[k];
}));
var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || function (mod) {
if (mod && mod.__esModule) return mod;
var result = {};
if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
__setModuleDefault(result, mod);
return result;
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.getLeafHash = exports.getTaprootScript = void 0;
const crypto = __importStar(require("crypto"));
const bitcoinjs_lib_1 = require("bitcoinjs-lib");
function getTaprootScript(base64PSBT) {
const psbtBuffer = Buffer.from(base64PSBT, 'base64');
const psbt = bitcoinjs_lib_1.Psbt.fromBuffer(psbtBuffer);
for (const input of psbt.data.inputs) {
// console.log(input);
if (input.tapLeafScript && input.tapLeafScript.length > 0) {
for (const leafScript of input.tapLeafScript) {
return leafScript.script;
}
}
}
return undefined;
}
exports.getTaprootScript = getTaprootScript;
// BIP341 Tagged Hash
function taggedHash(tag, data) {
const tagHash = crypto.createHash('sha256').update(tag).digest();
return crypto
.createHash('sha256')
.update(Buffer.concat([tagHash, tagHash, data]))
.digest();
}
function encodeVarint(n) {
if (n < 0xfd) {
return Buffer.from([n]);
}
else if (n <= 0xffff) {
const buf = Buffer.alloc(3);
buf.writeUInt8(0xfd, 0);
buf.writeUInt16LE(n, 1);
return buf;
}
else if (n <= 0xffffffff) {
const buf = Buffer.alloc(5);
buf.writeUInt8(0xfe, 0);
buf.writeUInt32LE(n, 1);
return buf;
}
else {
const buf = Buffer.alloc(9);
buf.writeUInt8(0xff, 0);
buf.writeUInt32LE(n, 1);
buf.writeBigUInt64LE(BigInt(n), 5);
return buf;
}
}
function getLeafHash(scriptBytes) {
const leafVersion = Buffer.from([0xc0]);
const scriptLen = scriptBytes.length;
// console.log('script_len =', scriptLen);
const varintLen = encodeVarint(scriptLen);
const toHash = Buffer.concat([leafVersion, varintLen, scriptBytes]);
const leafHash = taggedHash(Buffer.from('TapLeaf'), toHash);
// console.log('leaf_hash =', leafHash.toString('hex'));
return leafHash;
}
exports.getLeafHash = getLeafHash;
// const base64PSBT= 'cHNidP8BAH0CAAAAAe5Zu8YR8si9c+Pj2ZU0zXSRmAG8/Qxcee9e7BpsVHtOAAAAAAD/////AsQJAAAAAAAAFgAUW+EmJNCKK0JAldfAciHDNFDRS/EEpgAAAAAAACJRICyVutUKY9E6qBjfjktoZBga2/RyCoiq+OPBI1ugik2fAAAAAAABAStQwwAAAAAAACJRIEOj7UvRXfRV9er0SUNeReHNqaiqtOoEhmW60JCFUoUyQhXAUJKbdMGgSVS3i0tgNel6XgeKWg8o7JbVR7/ums6AOsCJtgX5iDHD5SbZ6yF5ZRRSk4qMD/f16u7MthJR1dRt6/15ASDcjS+e/wxPTb3gcKSOMw78kItip2ZWjZHmWPKEsyS4eK0gH5MjVzLmTKwzVprRw9vwQTgsO3dPz7BTO5sx1MKna/mtIAruBQmxbbccmZI4pIJ9uUVSaFmxPJVIerRnJTV8mp8lrCARPDoyqdMgtyGQoEoCCg2zl27zaXJnMljpo4o2Tz3DsLogF5Ic8VbMtOc9Qo+ZbtEbJFMT434nyXisTSzCHspGcuS6IDu5PfyLYYh9dx82MOmmPpfLr8/MeFVqR034OjGg74mcuiBAr69HxP+lbehkENjke6ortvBLYE9OokMjc33cP+CS37ogeacf/XHFA+8uL5G8z8j82nlG9GU87w2fPd4geV7zufC6INIfr3jGdRoNOOa9gCi5B/8H6ahppD/IN9az+N/2EZo2uiD1GZ764/KLuCR2Fjp+RYx61EXZv/sGgtENO9sstB+Ojrog+p2ILUX0BgvbgEIYOCjNh1RPHqmXOA5YbKt31f1phze6VpzAARcgUJKbdMGgSVS3i0tgNel6XgeKWg8o7JbVR7/ums6AOsAAAAA=';
// // const base64PSBT = "cHNidP8BAJ0CA7QhBO4F0lYcG2E6FzH5dNRhKK2s2m1nCOjM6eOMi7n9gGF1fRqaG8y6pg8o4hKTvNmOwYMKHkjZMbXl52yBTI3LHGXQ2TAJdF2EBnGZcTy6GfTZ2EwxoIbgq9h7Fe8LZYkL8P1zUyf+RwfklPyhxSJe6q8VHJ9lKNcsS/xHf0zTbXy9Bln5N4bfnYlLMX6kZaGdDzoLVgXN4zYZY+YhfzvXX9aWIrHkYQ9H6FS4u6IyzTn91PqOhP+YXGb4nA3F6mZcpe7MnI2br7ddh9v+qCTpgUKXXhFxq0NlwCjAxg0jN5d3Fq+mcLRg==";
// const taprootScript = getTaprootScript(base64PSBT).toString('hex');
// if (taprootScript) {
// console.log("Found Taproot script:", taprootScript);
// } else {
// console.log("No Taproot script found.");
// }
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