import { CurrencyCode, TokenSet, LogLevel } from './interfaces';
import { ExchangeRate, ExchangeRates, TransactionFeeRate, TransactionFeeRates } from './models';
import { User } from './User';
import { Utils } from './Utils';
/**
 * ZumoKit instance. Refer to <a href="https://developers.zumo.money/docs/guides/initialize-zumokit">documentation</a> for usage details.
 * */
export declare class ZumoKit {
    private zumoCoreModule;
    private socket;
    private wsListener;
    private zumoCore;
    private changeListeners;
    private changeListenersImpl;
    private disconnected;
    /** ZumoKit SDK semantic version tag if exists, commit hash otherwise. */
    version: string;
    /** Currently signed-in user or null. */
    currentUser: User | null;
    /** Crypto utilities. */
    utils: Utils;
    /** Mapping between currency pairs and available exchange rates. */
    exchangeRates: ExchangeRates;
    /** Mapping between cryptocurrencies and available transaction fee rates. */
    transactionFeeRates: TransactionFeeRates;
    private request;
    private connectWebSocket;
    private subscribe;
    send(message: string): void;
    private createWebSocket;
    /** @internal */
    constructor(zumoCoreModule: any, apiKey: string, apiUrl: string, transactionServiceUrl: string, cardServiceUrl: string, notificationServiceUrl: string, exchangeServiceUrl: string, custodyServiceUrl: string);
    /**
     * Sets log level for current logger.
     *
     * @param logLevel log level, e.g. 'debug' or 'info'
     */
    setLogLevel(logLevel: LogLevel): void;
    /**
     * Sets log handler for all ZumoKit related logs.
     *
     * @param listener interface to listen to changes
     * @param logLevel log level, e.g. 'debug' or 'info'
     */
    onLog(listener: (message: string) => void, logLevel: LogLevel): void;
    /**
     * Signs in user corresponding to user token set. Sets current user to the newly signed in user.
     * Refer to <a href="https://developers.zumo.money/docs/setup/server#get-zumokit-user-token">Server</a> guide for details on how to get user token set.
     *
     * @param tokenSet   user token set
     */
    signIn(userTokenSet: TokenSet): Promise<User>;
    /** Signs out current user. */
    signOut(): void;
    /**
     * Get exchange rate for selected currency pair.
     *
     * @param fromCurrency   currency code
     * @param toCurrency     currency code
     *
     * @return exchange rate or null
     */
    getExchangeRate(fromCurrency: CurrencyCode, toCurrency: CurrencyCode): ExchangeRate | null;
    /**
     * Get transaction fee rate for selected crypto currency.
     *
     * @param currency   currency code
     *
     * @return transaction fee rate or null
     */
    getTransactionFeeRate(currency: CurrencyCode): TransactionFeeRate | null;
    /**
     * Fetch historical exchange rates for supported time intervals.
     *
     * @return historical exchange rates
     */
    fetchHistoricalExchangeRates(): Promise<Partial<Record<import("./interfaces").TimeInterval, Partial<Record<CurrencyCode, Partial<Record<CurrencyCode, ExchangeRate[]>>>>>>>;
    /**
     * Listen to changes in current user’s sign in state, exchange rates, exchange settings or transaction fee rates.
     *
     * @param listener interface to listen to changes
     */
    addChangeListener(listener: () => void): void;
    /**
     * Remove change listener.
     *
     * @param listener interface to listen to changes
     */
    removeChangeListener(listener: () => void): void;
    /**
     * Stops WebSocket connection to Zumo Enterprise services.
     */
    disconnect(): void;
}