@polkadot/util-crypto
Version:
A collection of useful crypto utilities for @polkadot
35 lines (34 loc) • 1.44 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.secp256k1PairFromSeed = secp256k1PairFromSeed;
const secp256k1_1 = require("@noble/curves/secp256k1");
const util_1 = require("@polkadot/util");
const wasm_crypto_1 = require("@polkadot/wasm-crypto");
/**
* @name secp256k1PairFromSeed
* @description Returns a object containing a `publicKey` & `secretKey` generated from the supplied seed.
*/
function secp256k1PairFromSeed(seed, onlyJs) {
if (seed.length !== 32) {
throw new Error('Expected valid 32-byte private key as a seed');
}
if (!util_1.hasBigInt || (!onlyJs && (0, wasm_crypto_1.isReady)())) {
const full = (0, wasm_crypto_1.secp256k1FromSeed)(seed);
const publicKey = full.slice(32);
// There is an issue with the secp256k1 when running in an ASM.js environment where
// it seems that the lazy static section yields invalid results on the _first_ run.
// If this happens, fail outright, we cannot allow invalid return values
// https://github.com/polkadot-js/wasm/issues/307
if ((0, util_1.u8aEmpty)(publicKey)) {
throw new Error('Invalid publicKey generated from WASM interface');
}
return {
publicKey,
secretKey: full.slice(0, 32)
};
}
return {
publicKey: secp256k1_1.secp256k1.getPublicKey(seed, true),
secretKey: seed
};
}