import { FallbackGasPrices, GasOracleOptions, GetTxGasParamsRes } from 'gas-price-oracle';
import { Provider } from '@ethersproject/providers';
export declare type GasPriceKey = 'instant' | 'fast' | 'standard' | 'low';
export declare const DEFAULT_GAS_PRICES: {
    [key: number]: FallbackGasPrices;
};
export declare const estimateGasPrice: (provider: Provider, priceKey?: GasPriceKey, oracleOptions?: Partial<GasOracleOptions>) => Promise<GetTxGasParamsRes>;