import { SignerWithAddress } from '@nomiclabs/hardhat-ethers/signers';
import { BigNumber } from 'ethers';
export declare function getSigner(indexOrAddress?: number | string): Promise<SignerWithAddress>;
export declare function getSigners(size?: number, offset?: number): Promise<SignerWithAddress[]>;
export declare function impersonate(address: string, balance?: BigNumber): Promise<SignerWithAddress>;
export declare function impersonateWhale(balance?: BigNumber): Promise<SignerWithAddress>;