import BigNumber from 'bignumber.js';
import { Service } from '../../../Service';
import { IIndexBuyTokenService } from '../../../interfaces/IIndexBuyTokenService';
export declare class IndexBuyTokenService extends Service implements IIndexBuyTokenService {
    private derivativeFunctions;
    private minimumETHBalanceToBuy;
    private indexAddress;
    static create(productAddress: string): IndexBuyTokenService;
    private constructor();
    setMinimumETHBalanceToBuy(_minimumETHBalanceToBuy: number): void;
    getMinimumETHBalanceToBuy(): number;
    getETHBalance(): Promise<BigNumber>;
    canBuyTokens(): Promise<boolean>;
    getIndexBuyTokensTxData(): Promise<any>;
}