import { BucketedUserConfig, DevCycleServerSDKOptions, VariableDefinitions, InferredVariableType, DVCCustomDataJSON, ConfigMetadata } from '@devcycle/types';
import { DevCycleUser, DVCVariable, DVCVariableValue, DVCVariableSet, DVCFeatureSet, DevCycleEvent, VariableAndMetadata } from '@devcycle/js-cloud-server-sdk';
import { DevCycleOptionsLocalEnabled } from './index';
import { DevCycleProvider } from './open-feature/DevCycleProvider';
import { EvalHook } from './hooks/EvalHook';
export declare class DevCycleClient<Variables extends VariableDefinitions = VariableDefinitions> {
    private clientUUID;
    private hostname;
    private sdkKey;
    private configHelper?;
    private clientConfigHelper?;
    private eventQueue;
    private onInitialized;
    private logger;
    private _isInitialized;
    private openFeatureProvider;
    private bucketingLib;
    private bucketingTracker?;
    private bucketingImportPromise;
    private platformDetails;
    private sdkPlatform?;
    private hooksRunner;
    get isInitialized(): boolean;
    constructor(sdkKey: string, options?: DevCycleOptionsLocalEnabled);
    private setPlatformDataInBucketingLib;
    initializeBucketing({ options, }: {
        options?: DevCycleServerSDKOptions;
    }): Promise<void>;
    /**
     * @deprecated Use DevCycleProvider directly instead.
     * See docs: https://docs.devcycle.com/sdk/server-side-sdks/node/node-openfeature
     */
    getOpenFeatureProvider(): Promise<DevCycleProvider>;
    /**
     * Notify the user when Features have been loaded from the server.
     * An optional callback can be passed in, and will return a promise if no callback has been passed in.
     *
     * @param onInitialized
     */
    onClientInitialized(onInitialized?: (err?: Error) => void): Promise<DevCycleClient<Variables>>;
    variable<K extends string & keyof Variables, T extends DVCVariableValue & Variables[K]>(user: DevCycleUser, key: K, defaultValue: T): DVCVariable<T>;
    _variable<K extends string & keyof Variables, T extends DVCVariableValue & Variables[K]>(user: DevCycleUser, key: K, defaultValue: T): VariableAndMetadata<T>;
    variableValue<K extends string & keyof Variables, T extends DVCVariableValue & Variables[K]>(user: DevCycleUser, key: K, defaultValue: T): InferredVariableType<K, T>;
    allVariables(user: DevCycleUser): DVCVariableSet;
    allFeatures(user: DevCycleUser): DVCFeatureSet;
    track(user: DevCycleUser, event: DevCycleEvent): void;
    addHook(hook: EvalHook): void;
    private queueEvent;
    private queueAggregateEvent;
    private trackSDKConfigEvent;
    /**
     * Call this to obtain a config that is suitable for use in the "bootstrapConfig" option of client-side JS SDKs
     * Useful for serverside-rendering use cases where the server performs the initial rendering pass, and provides it
     * to the client along with the DevCycle config to allow hydration
     * @param user
     * @param userAgent
     */
    getClientBootstrapConfig(user: DevCycleUser, userAgent: string): Promise<BucketedUserConfig & {
        clientSDKKey: string;
    }>;
    flushEvents(callback?: () => void): Promise<void>;
    close(): Promise<void>;
    setClientCustomData(clientCustomData: DVCCustomDataJSON): void;
    getConfigMetadata(): ConfigMetadata | undefined;
}