import type { EventEmitter } from 'node:events';
import type { ApiResponse } from '../feature';
import type { CustomHeaders, CustomHeadersFunction } from '../headers';
import type { HttpOptions } from '../http-options';
import type { TagFilter } from '../tags';
import type { Mode } from '../unleash-config';
export interface FetcherInterface extends EventEmitter {
    start(): Promise<void>;
    stop(): void;
}
export interface FetchingOptions extends PollingFetchingOptions, StreamingFetchingOptions {
}
export interface CommonFetchingOptions {
    url: string;
    appName: string;
    instanceId: string;
    headers?: CustomHeaders;
    connectionId: string;
    onSave: (response: ApiResponse, fromApi: boolean) => Promise<void>;
    onModeChange?: (mode: Mode['type']) => Promise<void>;
}
export interface PollingFetchingOptions extends CommonFetchingOptions {
    refreshInterval: number;
    tags?: Array<TagFilter>;
    customHeadersFunction?: CustomHeadersFunction;
    mode: Mode;
    namePrefix?: string;
    projectName?: string;
    etag?: string;
    timeout?: number;
    httpOptions?: HttpOptions;
}
export interface StreamingFetchingOptions extends CommonFetchingOptions {
    eventSource?: EventSource;
    maxFailuresUntilFailover?: number;
    failureWindowMs?: number;
}
//# sourceMappingURL=fetcher.d.ts.map