@chorus-one/signer-local/dist/mjs/secp256k1.js

Local signer for Chorus One SDK that utilizes a BIP39 mnemonic for signing operations

import { HDKey as HDKeySecp256k1 } from '@scure/bip32';
import { secp256k1 } from '@noble/curves/secp256k1';
// We would love to use the @noble-secp256k1 package but it supports only esm:
//   https://github.com/paulmillr/noble-secp256k1/issues/115#issuecomment-1748018784
export function deriveKey(seed, hdPath) {
    const key = HDKeySecp256k1.fromMasterSeed(seed).derive(hdPath);
    if (key === null || key.publicKey == null || key.privateKey == null) {
        throw new Error('failed to derive keypair from seed');
    }
    return { publicKey: key.publicKey, privateKey: key.privateKey };
}
export async function sign(content, privKey) {
    const signature = secp256k1.sign(Buffer.from(content, 'hex'), privKey);
    const rawSig = signature.toCompactRawBytes();
    const sig = {
        fullSig: signature.toCompactHex(),
        r: Buffer.from(rawSig.subarray(0, 32)).toString('hex'),
        s: Buffer.from(rawSig.subarray(32, 64)).toString('hex'),
        v: signature.recovery
    };
    return sig;
}