import { ErrorDescription } from '@ethersproject/abi/lib/interface';
import { utils } from 'ethers';
type Obj = Record<string, unknown>;
export declare function getInnermostError<T>(err: T): Obj | undefined;
export declare function decodeCustomError<T>(iface: utils.Interface, err: T): ErrorDescription | void;
export declare function formatCustomError({ name, signature, args, sighash }: ErrorDescription): Error;
export declare function extractCustomError<T>(iface: utils.Interface, err: T): Error | void;
export {};