/******************************************************************************
 *
 *  (C) 2022 AhnLab Blockchain Company, Inc. All rights reserved.
 *  Any part of this source code can not be copied with any method without
 *  prior written permission from the author or authorized person.
 *
 ******************************************************************************/
import { ProviderConnectionManager } from '../../usecase/provider/connectionManager';
export declare const LEGACY_GAS_PRICES_API_URL = "https://api.metaswap.codefi.network/gasPrices";
export type unknownString = 'unknown';
export type FeeMarketEstimateType = 'fee-market';
export type LegacyEstimateType = 'legacy';
export type EthGasPriceEstimateType = 'eth_gasPrice';
export type NoEstimateType = 'none';
/**
 * Indicates which type of gasEstimate the controller is currently returning.
 * This is useful as a way of asserting that the shape of gasEstimates matches
 * expectations. NONE is a special case indicating that no previous gasEstimate
 * has been fetched.
 */
export declare const GAS_ESTIMATE_TYPES: {
    META_SWAP: "fee-market";
    ALCHEMY: "fee-market";
    NONE: "none";
};
export type GasEstimateType = FeeMarketEstimateType | EthGasPriceEstimateType | LegacyEstimateType | NoEstimateType;
export interface EstimatedGasFeeTimeBounds {
    lowerTimeBound: number | null;
    upperTimeBound: number | unknownString;
}
/**
 * @type EthGasPriceEstimate
 *
 * A single gas price estimate for networks and accounts that don't support EIP-1559
 * This estimate comes from eth_gasPrice but is converted to dec gwei to match other
 * return values
 *
 * @property gasPrice - A GWEI dec string
 */
export interface EthGasPriceEstimate {
    gasPrice: string;
}
/**
 * @type LegacyGasPriceEstimate
 *
 * A set of gas price estimates for networks and accounts that don't support EIP-1559
 * These estimates include low, medium and high all as strings representing gwei in
 * decimal format.
 *
 * @property high - gasPrice, in decimal gwei string format, suggested for fast inclusion
 * @property medium - gasPrice, in decimal gwei string format, suggested for avg inclusion
 * @property low - gasPrice, in decimal gwei string format, suggested for slow inclusion
 */
export interface LegacyGasPriceEstimate {
    high: string;
    medium: string;
    low: string;
}
/**
 * @type Eip1559GasFee
 *
 * Data necessary to provide an estimate of a gas fee with a specific tip
 *
 * @property minWaitTimeEstimate - The fastest the transaction will take, in milliseconds
 * @property maxWaitTimeEstimate - The slowest the transaction will take, in milliseconds
 * @property suggestedMaxPriorityFeePerGas - A suggested "tip", a GWEI hex number
 * @property suggestedMaxFeePerGas - A suggested max fee, the most a user will pay. a GWEI hex number
 */
export interface Eip1559GasFee {
    minWaitTimeEstimate: number;
    maxWaitTimeEstimate: number;
    suggestedMaxPriorityFeePerGas: string;
    suggestedMaxFeePerGas: string;
}
/**
 * @type GasFeeEstimates
 *
 * Data necessary to provide multiple GasFee estimates, and supporting information, to the user
 *
 * @property low - A GasFee for a minimum necessary combination of tip and maxFee
 * @property medium - A GasFee for a recommended combination of tip and maxFee
 * @property high - A GasFee for a high combination of tip and maxFee
 * @property estimatedBaseFee - An estimate of what the base fee will be for the pending/next block. A GWEI dec number
 */
export interface GasFeeEstimates {
    low: Eip1559GasFee;
    medium: Eip1559GasFee;
    high: Eip1559GasFee;
    estimatedBaseFee: string;
}
export type GasFeeStateEthGasPrice = {
    gasFeeEstimates: EthGasPriceEstimate;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: EthGasPriceEstimateType;
};
export type GasFeeStateFeeMarket = {
    gasFeeEstimates: GasFeeEstimates;
    estimatedGasFeeTimeBounds: EstimatedGasFeeTimeBounds | Record<string, never>;
    gasEstimateType: FeeMarketEstimateType;
};
export type GasFeeStateLegacy = {
    gasFeeEstimates: LegacyGasPriceEstimate;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: LegacyEstimateType;
};
export type GasFeeStateNoEstimates = {
    gasFeeEstimates: Record<string, never>;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: NoEstimateType;
};
export interface FetchGasFeeEstimateOptions {
    shouldUpdateState?: boolean;
}
/**
 * @type GasFeeState
 *
 * Gas Fee controller state
 *
 * @property gasFeeEstimates - Gas fee estimate data based on new EIP-1559 properties
 * @property estimatedGasFeeTimeBounds - Estimates representing the minimum and maximum
 */
export type GasFeeState = GasFeeStateEthGasPrice | GasFeeStateFeeMarket | GasFeeStateLegacy | GasFeeStateNoEstimates;
declare const name = "GasFeeController";
export type GetGasFeeState = {
    type: `${typeof name}:getState`;
    handler: () => GasFeeState;
};
/**
 * Controller that retrieves gas fee estimate data and polls for updated data on a set interval
 */
export declare class GasFeeService {
    private providerConnManager;
    private intervalId?;
    private intervalDelay;
    private pollTokens;
    private legacyAPIEndpoint;
    private EIP1559APIEndpoint;
    fetchGasEstimates: any;
    fetchAlchemyGasPriceEstimate: any;
    /**
     * Creates a GasFeeController instance
     *
     */
    constructor(providerConnManager: ProviderConnectionManager);
    fetchGasFeeEstimates(options?: FetchGasFeeEstimateOptions): Promise<GasFeeState>;
    getGasFeeEstimatesAndStartPolling(pollToken?: string): Promise<string>;
    /**
     * Gets and sets gasFeeEstimates in state
     *
     * @returns GasFeeEstimates
     */
    _fetchGasFeeEstimateData(options?: FetchGasFeeEstimateOptions): Promise<GasFeeState | undefined>;
    /**
     * Remove the poll token, and stop polling if the set of poll tokens is empty
     */
    disconnectPoller(pollToken: string): void;
    stopPolling(): void;
    private _startPolling;
    private _poll;
    private getEIP1559Compatibility;
}
export {};