import { Provider } from 'web3/providers';
import Web3 from 'web3';
import { TransactionObject } from 'web3/eth/types';
import { IERC20 as ERC20 } from '../../build/wrappers/IERC20';
import { HashflowToken } from '../../build/wrappers/HashflowToken';
import { ContractCallOptions, TxResult, address, Options, ContractConstantCallOptions } from '../types';
export declare class Contracts {
    private blockGasLimit;
    private autoGasMultiplier;
    private defaultGas;
    private defaultGasPrice;
    web3: Web3;
    erc20: ERC20;
    hashflowToken: HashflowToken;
    constructor(provider: Provider, networkId: number, web3: Web3, options: Options);
    setProvider(provider: Provider, networkId: number): void;
    setDefaultAccount(account: address): void;
    callContractFunction<T>(method: TransactionObject<T>, options?: ContractCallOptions): Promise<TxResult>;
    callConstantContractFunction<T>(method: TransactionObject<T>, options?: ContractConstantCallOptions): Promise<T>;
    private setGasLimit;
    private setContractProvider;
}