import { LikeFetch } from './flagsmith-core';
import { IFlagsmithValue } from './types';
export declare const FLAG_EXPOSURE_EVENT = "$flag_exposure";
export declare const DEFAULT_EVENTS_API_URL = "https://events.api.flagsmith.com/";
export interface IEvent {
    event: string;
    feature_name: string | null;
    identifier: string | null;
    value: string | null;
    traits: Record<string, IFlagsmithValue> | null;
    metadata: Record<string, unknown> | null;
    timestamp: number;
}
export interface EventProcessorOptions {
    environmentKey: string;
    fetch: LikeFetch;
    eventsApiUrl?: string;
    maxBuffer?: number;
    flushInterval?: number;
    log?: (...args: any[]) => void;
    retryBackoffMs?: number;
}
interface EventArgs {
    identifier: string | null;
    value: IFlagsmithValue;
    traits: Record<string, IFlagsmithValue> | null;
    metadata: Record<string, unknown> | null;
}
interface TrackEventArgs extends EventArgs {
    event: string;
}
interface TrackExposureArgs extends EventArgs {
    featureName: string;
}
export declare class EventProcessor {
    private endpoint;
    private environmentKey;
    private fetch;
    private log;
    private maxBuffer;
    private flushInterval;
    private retryBackoffMs;
    private buffer;
    private dedupeKeys;
    private timer;
    constructor(opts: EventProcessorOptions);
    trackEvent(args: TrackEventArgs): void;
    trackExposureEvent(args: TrackExposureArgs): void;
    private bufferEvent;
    flush: () => Promise<void>;
    start(): void;
    stop(): void;
    private postBatch;
}
export {};