import { Interface, FunctionFragment, EventFragment } from 'ethers';
/**
  *  Fetch  contract  ABI  from  block  explorer  API
  */
export declare function fetchABIFromExplorer(contractAddress: string, chainId: number, apiKey?: string): Promise<any[] | null>;
/**
  *  Create  an  Interface  from  ABI
  */
export declare function createInterfaceFromABI(abi: any[]): Interface;
/**
  *  Get  function  fragment  from  ABI  by  signature
  */
export declare function getFunctionFragment(iface: Interface, signature: string): FunctionFragment | null;
/**
  *  Get  event  fragment  from  ABI  by  signature
  */
export declare function getEventFragment(iface: Interface, signature: string): EventFragment | null;
/**
  *  Clear  ABI  cache
  */
export declare function clearABICache(): void;
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