@bitgo/secp256k1
Version:
Low-level cryptographic methods used in BitGo packages for the secp256k1 curve
90 lines • 8.81 kB
JavaScript
;
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Object.defineProperty(o, "default", { enumerable: true, value: v });
}) : function(o, v) {
o["default"] = v;
});
var __importStar = (this && this.__importStar) || (function () {
var ownKeys = function(o) {
ownKeys = Object.getOwnPropertyNames || function (o) {
var ar = [];
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};
})();
Object.defineProperty(exports, "__esModule", { value: true });
exports.signMessage = signMessage;
exports.verifyMessage = verifyMessage;
const bitcoinMessage = __importStar(require("bitcoinjs-message"));
const createHash = require('create-hash');
const bs58check = require('bs58check');
/**
* Computes hash160 (RIPEMD160(SHA256(data)))
*/
function hash160(data) {
const sha256Hash = createHash('sha256').update(data).digest();
return createHash('ripemd160').update(sha256Hash).digest();
}
/**
* Encodes a hash with version byte in Base58Check format
*/
function toBase58Check(hash, version) {
const payload = Buffer.allocUnsafe(21);
payload.writeUInt8(version, 0);
hash.copy(payload, 1);
return bs58check.encode(payload);
}
// Bitcoin mainnet pubKeyHash version byte
const BITCOIN_PUBKEY_HASH_VERSION = 0x00;
/**
* bip32-aware wrapper around bitcoin-message package
* @see {bitcoinMessage.sign}
*/
function signMessage(message, privateKey, network) {
if (!Buffer.isBuffer(privateKey)) {
privateKey = privateKey.privateKey;
if (!privateKey) {
throw new Error(`must provide privateKey`);
}
}
if (network === null || typeof network !== 'object' || typeof network.messagePrefix !== 'string') {
throw new Error(`invalid argument 'network'`);
}
const compressed = true;
return bitcoinMessage.sign(message, privateKey, compressed, network.messagePrefix);
}
/**
* bip32-aware wrapper around bitcoin-message package
* @see {bitcoinMessage.verify}
*/
function verifyMessage(message, publicKey, signature, network) {
if (!Buffer.isBuffer(publicKey)) {
publicKey = publicKey.publicKey;
}
if (network === null || typeof network !== 'object' || typeof network.messagePrefix !== 'string') {
throw new Error(`invalid argument 'network'`);
}
const address = toBase58Check(hash160(publicKey), BITCOIN_PUBKEY_HASH_VERSION);
return bitcoinMessage.verify(message, address, signature, network.messagePrefix);
}
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V0d29yayAhPT0gJ29iamVjdCcgfHwgdHlwZW9mIG5ldHdvcmsubWVzc2FnZVByZWZpeCAhPT0gJ3N0cmluZycpIHtcbiAgICB0aHJvdyBuZXcgRXJyb3IoYGludmFsaWQgYXJndW1lbnQgJ25ldHdvcmsnYCk7XG4gIH1cblxuICBjb25zdCBhZGRyZXNzID0gdG9CYXNlNThDaGVjayhoYXNoMTYwKHB1YmxpY0tleSksIEJJVENPSU5fUFVCS0VZX0hBU0hfVkVSU0lPTik7XG4gIHJldHVybiBiaXRjb2luTWVzc2FnZS52ZXJpZnkobWVzc2FnZSwgYWRkcmVzcywgc2lnbmF0dXJlLCBuZXR3b3JrLm1lc3NhZ2VQcmVmaXgpO1xufVxuIl19