/**
 * API Response Compression Middleware
 *
 * Implements gzip and brotli compression for API responses
 */
interface CompressionOptions {
    threshold?: number;
    level?: number;
    preferBrotli?: boolean;
    excludeTypes?: string[];
}
/**
 * Compress API response
 */
export declare function compressResponse(request: Request, response: Response, options?: CompressionOptions): Promise<Response>;
/**
 * Create compression middleware
 */
export declare function createCompressionMiddleware(options?: CompressionOptions): (request: Request, next: () => Promise<Response>) => Promise<Response>;
/**
 * Calculate compression ratio
 */
export declare function getCompressionRatio(originalSize: number, compressedSize: number): number;
/**
 * Get compression stats
 */
export interface CompressionStats {
    originalSize: number;
    compressedSize: number;
    compressionRatio: number;
    encoding: string;
    savings: number;
}
export declare function getCompressionStats(originalBody: string | Uint8Array, compressedBody: Uint8Array, encoding: string): CompressionStats;
/**
 * Preset compression configurations
 */
export declare const COMPRESSION_PRESETS: {
    readonly fast: {
        readonly threshold: 512;
        readonly level: 3;
        readonly preferBrotli: false;
    };
    readonly balanced: {
        readonly threshold: 1024;
        readonly level: 6;
        readonly preferBrotli: true;
    };
    readonly max: {
        readonly threshold: 512;
        readonly level: 9;
        readonly preferBrotli: true;
    };
    readonly static: {
        readonly threshold: 1024;
        readonly level: 9;
        readonly preferBrotli: true;
    };
    readonly api: {
        readonly threshold: 512;
        readonly level: 6;
        readonly preferBrotli: true;
        readonly excludeTypes: readonly ["image/png", "image/jpeg", "image/gif", "image/webp", "video/mp4", "application/zip", "application/gzip", "application/pdf"];
    };
};
/**
 * Compress JSON response
 */
export declare function compressJSON(data: unknown, encoding?: 'gzip' | 'br', level?: number): Promise<Uint8Array>;
/**
 * Decompress response
 */
export declare function decompressBody(body: Uint8Array, encoding: string): Promise<Uint8Array>;
/**
 * Check if compression is supported
 */
export declare function isCompressionSupported(request: Request): {
    gzip: boolean;
    brotli: boolean;
};
export {};
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