import type { Patch } from 'immer';
import { BaseController } from '../BaseControllerV2';
import type { RestrictedControllerMessenger } from '../ControllerMessenger';
import type { NetworkController, NetworkState } from '../network/NetworkController';
export declare const LEGACY_GAS_PRICES_API_URL = "https://api.metaswap.codefi.network/gasPrices";
export declare type unknownString = 'unknown';
export declare type FeeMarketEstimateType = 'fee-market';
export declare type LegacyEstimateType = 'legacy';
export declare type EthGasPriceEstimateType = 'eth_gasPrice';
export declare 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: {
    FEE_MARKET: "fee-market";
    LEGACY: "legacy";
    ETH_GASPRICE: "eth_gasPrice";
    NONE: "none";
};
export declare type GasEstimateType = FeeMarketEstimateType | EthGasPriceEstimateType | LegacyEstimateType | NoEstimateType;
export declare type 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 declare type 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 declare type 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 declare type 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
 * @property networkCongestion - A normalized number that can be used to gauge the congestion
 * level of the network, with 0 meaning not congested and 1 meaning extremely congested
 */
export declare type GasFeeEstimates = SourcedGasFeeEstimates | FallbackGasFeeEstimates;
declare type SourcedGasFeeEstimates = {
    low: Eip1559GasFee;
    medium: Eip1559GasFee;
    high: Eip1559GasFee;
    estimatedBaseFee: string;
    historicalBaseFeeRange: [string, string];
    baseFeeTrend: 'up' | 'down' | 'level';
    latestPriorityFeeRange: [string, string];
    historicalPriorityFeeRange: [string, string];
    priorityFeeTrend: 'up' | 'down' | 'level';
    networkCongestion: number;
};
declare type FallbackGasFeeEstimates = {
    low: Eip1559GasFee;
    medium: Eip1559GasFee;
    high: Eip1559GasFee;
    estimatedBaseFee: string;
    historicalBaseFeeRange: null;
    baseFeeTrend: null;
    latestPriorityFeeRange: null;
    historicalPriorityFeeRange: null;
    priorityFeeTrend: null;
    networkCongestion: null;
};
export declare type GasFeeStateEthGasPrice = {
    gasFeeEstimates: EthGasPriceEstimate;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: EthGasPriceEstimateType;
};
export declare type GasFeeStateFeeMarket = {
    gasFeeEstimates: GasFeeEstimates;
    estimatedGasFeeTimeBounds: EstimatedGasFeeTimeBounds | Record<string, never>;
    gasEstimateType: FeeMarketEstimateType;
};
export declare type GasFeeStateLegacy = {
    gasFeeEstimates: LegacyGasPriceEstimate;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: LegacyEstimateType;
};
export declare type GasFeeStateNoEstimates = {
    gasFeeEstimates: Record<string, never>;
    estimatedGasFeeTimeBounds: Record<string, never>;
    gasEstimateType: NoEstimateType;
};
export declare type 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 declare type GasFeeState = GasFeeStateEthGasPrice | GasFeeStateFeeMarket | GasFeeStateLegacy | GasFeeStateNoEstimates;
declare const name = "GasFeeController";
export declare type GasFeeStateChange = {
    type: `${typeof name}:stateChange`;
    payload: [GasFeeState, Patch[]];
};
export declare type GetGasFeeState = {
    type: `${typeof name}:getState`;
    handler: () => GasFeeState;
};
declare type GasFeeMessenger = RestrictedControllerMessenger<typeof name, GetGasFeeState, GasFeeStateChange, never, never>;
/**
 * Controller that retrieves gas fee estimate data and polls for updated data on a set interval
 */
export declare class GasFeeController extends BaseController<typeof name, GasFeeState, GasFeeMessenger> {
    private intervalId?;
    private intervalDelay;
    private pollTokens;
    private legacyAPIEndpoint;
    private EIP1559APIEndpoint;
    private getCurrentNetworkEIP1559Compatibility;
    private getCurrentNetworkLegacyGasAPICompatibility;
    private getCurrentAccountEIP1559Compatibility;
    private getChainId;
    private currentChainId;
    private ethQuery;
    private clientId?;
    /**
     * Creates a GasFeeController instance.
     *
     * @param options - The controller options.
     * @param options.interval - The time in milliseconds to wait between polls.
     * @param options.messenger - The controller messenger.
     * @param options.state - The initial state.
     * @param options.getCurrentNetworkEIP1559Compatibility - Determines whether or not the current
     * network is EIP-1559 compatible.
     * @param options.getCurrentNetworkLegacyGasAPICompatibility - Determines whether or not the
     * current network is compatible with the legacy gas price API.
     * @param options.getCurrentAccountEIP1559Compatibility - Determines whether or not the current
     * account is EIP-1559 compatible.
     * @param options.getChainId - Returns the current chain ID.
     * @param options.getProvider - Returns a network provider for the current network.
     * @param options.onNetworkStateChange - A function for registering an event handler for the
     * network state change event.
     * @param options.legacyAPIEndpoint - The legacy gas price API URL. This option is primarily for
     * testing purposes.
     * @param options.EIP1559APIEndpoint - The EIP-1559 gas price API URL. This option is primarily
     * for testing purposes.
     * @param options.clientId - The client ID used to identify to the gas estimation API who is
     * asking for estimates.
     */
    constructor({ interval, messenger, state, getCurrentNetworkEIP1559Compatibility, getCurrentAccountEIP1559Compatibility, getChainId, getCurrentNetworkLegacyGasAPICompatibility, getProvider, onNetworkStateChange, legacyAPIEndpoint, EIP1559APIEndpoint, clientId, }: {
        interval?: number;
        messenger: GasFeeMessenger;
        state?: GasFeeState;
        getCurrentNetworkEIP1559Compatibility: () => Promise<boolean>;
        getCurrentNetworkLegacyGasAPICompatibility: () => boolean;
        getCurrentAccountEIP1559Compatibility?: () => boolean;
        getChainId: () => `0x${string}` | `${number}` | number;
        getProvider: () => NetworkController['provider'];
        onNetworkStateChange: (listener: (state: NetworkState) => void) => void;
        legacyAPIEndpoint?: string;
        EIP1559APIEndpoint?: string;
        clientId?: string;
    });
    resetPolling(): Promise<void>;
    fetchGasFeeEstimates(options?: FetchGasFeeEstimateOptions): Promise<GasFeeState>;
    getGasFeeEstimatesAndStartPolling(pollToken: string | undefined): Promise<string>;
    /**
     * Gets and sets gasFeeEstimates in state.
     *
     * @param options - The gas fee estimate options.
     * @param options.shouldUpdateState - Determines whether the state should be updated with the
     * updated gas estimates.
     * @returns The gas fee estimates.
     */
    _fetchGasFeeEstimateData(options?: FetchGasFeeEstimateOptions): Promise<GasFeeState>;
    /**
     * Remove the poll token, and stop polling if the set of poll tokens is empty.
     *
     * @param pollToken - The poll token to disconnect.
     */
    disconnectPoller(pollToken: string): void;
    stopPolling(): void;
    /**
     * Prepare to discard this controller.
     *
     * This stops any active polling.
     */
    destroy(): void;
    private _poll;
    private resetState;
    private getEIP1559Compatibility;
    getTimeEstimate(maxPriorityFeePerGas: string, maxFeePerGas: string): EstimatedGasFeeTimeBounds | Record<string, never>;
}
export default GasFeeController;