/**
 * @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 EthERC20.ts
 * @copyright SKALE Labs 2022-Present
 */
import { type TransactionResponse, type BigNumberish } from 'ethers';
import { BaseContract } from '../BaseContract';
import type TxOpts from '../../TxOpts';
export declare class EthERC20 extends BaseContract {
    balanceOf(address: string): Promise<bigint>;
    approve(address: string, amount: BigNumberish, opts: TxOpts): Promise<TransactionResponse>;
}