@polkadot/util-crypto/sr25519/sign.js

A collection of useful crypto utilities for @polkadot

import * as sr25519 from '@scure/sr25519';
import { u8aToU8a } from '@polkadot/util';
/**
 * @name sr25519Sign
 * @description Returns message signature of `message`, using the supplied pair
 */
export function sr25519Sign(message, { publicKey, secretKey }) {
    if (publicKey?.length !== 32) {
        throw new Error('Expected a valid publicKey, 32-bytes');
    }
    else if (secretKey?.length !== 64) {
        throw new Error('Expected a valid secretKey, 64-bytes');
    }
    return sr25519.sign(secretKey, u8aToU8a(message));
}