import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
import { BigNumberish, Signature } from "ethers";
export interface Permit {
    token: string;
    owner: string;
    spender: string;
    value: BigNumberish;
    deadline: BigNumberish;
    nonce?: BigNumberish;
}
export declare function signPermit(signer: SignerWithAddress, permit: Permit): Promise<Signature>;