import type { FetchRequest, IConfigCatConfigFetcher } from "../ConfigFetcher.js";
import { fetchInternalAsyncMethodName, FetchResponse } from "../ConfigFetcher.js";
export declare abstract class FetchApiConfigFetcherBase implements IConfigCatConfigFetcher {
    private readonly runsOnServerSide?;
    private requestRetryDelayMs;
    private readonly disposeToken;
    dispose(): void;
    constructor(runsOnServerSide?: boolean | undefined);
    fetchAsync(request: FetchRequest): Promise<FetchResponse>;
    private [fetchInternalAsyncMethodName];
    private fetchWithRetryAsync;
    private fetchCoreAsync;
    protected setRequestHeaders(requestInit: {
        headers?: [string, string][];
    }, headers: ReadonlyArray<readonly [string, string]>): void;
}
export declare class ClientSideFetchApiConfigFetcher extends FetchApiConfigFetcherBase {
    private static getFactory;
}
export declare class ServerSideFetchApiConfigFetcher extends FetchApiConfigFetcherBase {
    private static getFactory;
    constructor();
}