import { BigNumber, BytesLike, Signature } from 'ethers';
export interface Permit {
    owner: string;
    spender: string;
    value: BigNumber;
    nonce: BigNumber;
    deadline: BigNumber;
}
export declare function signPermit(signer: BytesLike, chainId: number, contractAddress: string, permit: Permit, salt: string): Signature;
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