@okxweb3/coin-bitcoin
Version:
@ok/coin-bitcoin is a Bitcoin SDK for building Web3 wallets and applications. It supports BTC, BSV, DOGE, LTC, and TBTC, enabling private key management, transaction signing, address generation, and inscriptions like BRC-20, Runes, CAT, and Atomicals.
76 lines • 2.87 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.canAddToArray = exports.check = exports.expected = exports.encode = exports.decode = void 0;
const typeFields_1 = require("../../typeFields");
const range = (n) => [...Array(n).keys()];
function decode(keyVal) {
if (keyVal.key[0] !== typeFields_1.GlobalTypes.GLOBAL_XPUB) {
throw new Error('Decode Error: could not decode globalXpub with key 0x' +
keyVal.key.toString('hex'));
}
if (keyVal.key.length !== 79 || ![2, 3].includes(keyVal.key[46])) {
throw new Error('Decode Error: globalXpub has invalid extended pubkey in key 0x' +
keyVal.key.toString('hex'));
}
if ((keyVal.value.length / 4) % 1 !== 0) {
throw new Error('Decode Error: Global GLOBAL_XPUB value length should be multiple of 4');
}
const extendedPubkey = keyVal.key.slice(1);
const data = {
masterFingerprint: keyVal.value.slice(0, 4),
extendedPubkey,
path: 'm',
};
for (const i of range(keyVal.value.length / 4 - 1)) {
const val = keyVal.value.readUInt32LE(i * 4 + 4);
const isHard = !!(val & 0x80000000);
const idx = val & 0x7fffffff;
data.path += '/' + idx.toString(10) + (isHard ? "'" : '');
}
return data;
}
exports.decode = decode;
function encode(data) {
const head = Buffer.from([typeFields_1.GlobalTypes.GLOBAL_XPUB]);
const key = Buffer.concat([head, data.extendedPubkey]);
const splitPath = data.path.split('/');
const value = Buffer.allocUnsafe(splitPath.length * 4);
data.masterFingerprint.copy(value, 0);
let offset = 4;
splitPath.slice(1).forEach(level => {
const isHard = level.slice(-1) === "'";
let num = 0x7fffffff & parseInt(isHard ? level.slice(0, -1) : level, 10);
if (isHard)
num += 0x80000000;
value.writeUInt32LE(num, offset);
offset += 4;
});
return {
key,
value,
};
}
exports.encode = encode;
exports.expected = '{ masterFingerprint: Buffer; extendedPubkey: Buffer; path: string; }';
function check(data) {
const epk = data.extendedPubkey;
const mfp = data.masterFingerprint;
const p = data.path;
return (Buffer.isBuffer(epk) &&
epk.length === 78 &&
[2, 3].indexOf(epk[45]) > -1 &&
Buffer.isBuffer(mfp) &&
mfp.length === 4 &&
typeof p === 'string' &&
!!p.match(/^m(\/\d+'?)*$/));
}
exports.check = check;
function canAddToArray(array, item, dupeSet) {
const dupeString = item.extendedPubkey.toString('hex');
if (dupeSet.has(dupeString))
return false;
dupeSet.add(dupeString);
return (array.filter(v => v.extendedPubkey.equals(item.extendedPubkey)).length === 0);
}
exports.canAddToArray = canAddToArray;
//# sourceMappingURL=globalXpub.js.map