import { BlockchainName } from '../../core/blockchain/models/blockchain-name';
import BigNumber from 'bignumber.js';
import { HttpClient } from '../models/http-client';
export declare class GasPriceApi {
    private readonly httpClient;
    /**
     * Gas price request interval in seconds.
     */
    private static readonly requestInterval;
    constructor(httpClient: HttpClient);
    /**
     * Gas price in Wei for selected blockchain.
     * @param blockchain Blockchain to get gas price from.
     * @return Promise<BigNumber> Average gas price in Wei.
     */
    getGasPrice(blockchain: BlockchainName): Promise<string>;
    /**
     * Gas price in Eth units for selected blockchain.
     * @param blockchain Blockchain to get gas price from.
     * @return Promise<BigNumber> Average gas price in Eth units.
     */
    getGasPriceInEthUnits(blockchain: BlockchainName): Promise<BigNumber>;
    /**
     * Gets Ethereum gas price from different APIs, sorted by priority.
     * @return Promise<BigNumber> Average gas price in Wei.
     */
    private fetchEthGas;
    /**
     * Gets Avalanche gas price.
     * @return Promise<BigNumber> Average gas price in Wei.
     */
    private fetchGas;
}