/**
 * @license
 * SKALE ima-js
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

/**
 * @file helper.ts
 * @copyright SKALE Labs 2021-Present
 */

import * as constants from './constants';
import InvalidCredentialsException from './exceptions/InvalidCredentialsException';

export function add0x (s: string | undefined): string {
    if (s === undefined) return ''
    if (!s.startsWith('0x')) {
        return '0x' + s;
    }
    return s;
}

export function validatePrivateKey (privateKey: string): void {
    if (!constants.PRIVATE_KEY_REGEX.test(privateKey)) {
        throw new InvalidCredentialsException(constants.errorMessages.INVALID_PRIVATEKEY);
    }
}

export async function sleep (ms: number): Promise<any> {
    return await new Promise(resolve => setTimeout(resolve, ms));
}