/**
 * Utility functions for handling fetch in different environments
 */
export interface FetchResponse {
    json(): Promise<any>;
    text(): Promise<string>;
    arrayBuffer(): Promise<ArrayBuffer>;
    body: ReadableStream<Uint8Array>;
    ok: boolean;
    status: number;
    statusText: string;
    headers: Headers;
}
export interface FetchOptions {
    method?: string;
    headers?: Record<string, string>;
    body?: string | ArrayBuffer | Uint8Array;
}
export type FetchFunction = (url: string, options?: FetchOptions) => Promise<FetchResponse>;
/**
 * Get a fetch implementation that works in both Node.js and browser environments
 *
 * This function tries to use:
 * 1. The global fetch if available (browsers and Node.js >= 18)
 * 2. node-fetch if installed (for older Node.js versions)
 * 3. Falls back to a mock implementation that throws an error
 *
 * @returns A fetch function that works in the current environment
 */
export declare function getFetch(): FetchFunction;
/**
 * Check if fetch is available in the current environment
 *
 * @returns True if fetch is available, false otherwise
 */
export declare function isFetchAvailable(): boolean;