@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.
68 lines • 2.29 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");
function decode(keyVal) {
if (keyVal.key[0] !== typeFields_1.InputTypes.PARTIAL_SIG) {
throw new Error('Decode Error: could not decode partialSig with key 0x' +
keyVal.key.toString('hex'));
}
if (!(keyVal.key.length === 34 || keyVal.key.length === 66) ||
![2, 3, 4].includes(keyVal.key[1])) {
throw new Error('Decode Error: partialSig has invalid pubkey in key 0x' +
keyVal.key.toString('hex'));
}
const pubkey = keyVal.key.slice(1);
return {
pubkey,
signature: keyVal.value,
};
}
exports.decode = decode;
function encode(pSig) {
const head = Buffer.from([typeFields_1.InputTypes.PARTIAL_SIG]);
return {
key: Buffer.concat([head, pSig.pubkey]),
value: pSig.signature,
};
}
exports.encode = encode;
exports.expected = '{ pubkey: Buffer; signature: Buffer; }';
function check(data) {
return (Buffer.isBuffer(data.pubkey) &&
Buffer.isBuffer(data.signature) &&
[33, 65].includes(data.pubkey.length) &&
[2, 3, 4].includes(data.pubkey[0]) &&
isDerSigWithSighash(data.signature));
}
exports.check = check;
function isDerSigWithSighash(buf) {
if (!Buffer.isBuffer(buf) || buf.length < 9)
return false;
if (buf[0] !== 0x30)
return false;
if (buf.length !== buf[1] + 3)
return false;
if (buf[2] !== 0x02)
return false;
const rLen = buf[3];
if (rLen > 33 || rLen < 1)
return false;
if (buf[3 + rLen + 1] !== 0x02)
return false;
const sLen = buf[3 + rLen + 2];
if (sLen > 33 || sLen < 1)
return false;
if (buf.length !== 3 + rLen + 2 + sLen + 2)
return false;
return true;
}
function canAddToArray(array, item, dupeSet) {
const dupeString = item.pubkey.toString('hex');
if (dupeSet.has(dupeString))
return false;
dupeSet.add(dupeString);
return array.filter(v => v.pubkey.equals(item.pubkey)).length === 0;
}
exports.canAddToArray = canAddToArray;
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