import { ContractCallAction } from '../actions/ContractCallAction';
import { EncodedFunctionOutput, EncodedFunctionParameter } from '../types';
import { ethers, TransactionResponse } from 'ethers';
export declare let web3provider: ethers.JsonRpcProvider;
export declare function poll<T>(fetchFn: () => Promise<T>, conditionFn: (response: T) => boolean, intervalSeconds?: number): Promise<T>;
export declare const wait: (ms: number) => Promise<unknown>;
export declare function isBrowser(): boolean;
export declare function ensureBrowser(): void;
export declare function getWeb3Provider(chainId: string): Promise<ethers.JsonRpcProvider>;
export declare function readContract(contract_address: string, function_name: string, function_params: EncodedFunctionParameter[], output_params: EncodedFunctionOutput[], caller_address: string): Promise<import("../types").ReadFromContractResult>;
export declare function writeContract(contract_address: string, function_name: string, function_params: EncodedFunctionParameter[], eth_amount: string): Promise<ContractCallAction>;
export declare function signAndSendTransaction(contract_address: string, function_name: string, pk: string, parameter_names?: string[], function_params?: [EncodedFunctionParameter]): Promise<TransactionResponse>;
export declare function fetchChainlist(): Promise<Map<string, string>>;
export declare function fetchChainlinkContractsAddresses(): Promise<Map<string, string>>;