import { IERC20Permit } from "@artifacts/typechain";
import { BigNumber, BigNumberish, Signature } from "ethers";
import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
declare class PermitUtil {
    static createPermitSignature(wban: IERC20Permit, owner: SignerWithAddress, spender: string, value: BigNumberish, deadline: BigNumberish): Promise<Signature>;
    static createPermitSignatureForToken(name: string, version: string, verifyingContract: string, owner: SignerWithAddress, spender: string, value: BigNumberish, nonce: BigNumber, deadline: BigNumberish, chainId: number): Promise<Signature>;
}
export default PermitUtil;