import { binary, url } from '@synnaxlabs/x';
import { z } from 'zod';
import { FileOptions, FileTransport, UploadBody } from './file';
import { MiddlewareCollector } from './middleware';
import { UnaryClient } from './unary';
export declare const CONTENT_TYPE_HEADER_KEY = "Content-Type";
/**
 * The prefix freighter servers require on query-string parameters that should be
 * exposed to handlers as request params. Unprefixed query parameters are ignored so
 * arbitrary query strings never leak into the request context.
 */
export declare const FREIGHTER_METADATA_PREFIX = "freighterctx";
/**
 * HTTPClientFactory provides a POST and GET implementation of the Unary protocol.
 * @param url - The base URL of the API.
 * @param encoder - The encoder/decoder to use for the request/response.
 */
export declare class HTTPClient extends MiddlewareCollector implements UnaryClient, FileTransport {
    endpoint: url.URL;
    encoder: binary.Codec;
    constructor(endpoint: url.URL, encoder: binary.Codec, secure?: boolean);
    private get defaultHeaders();
    send<RQ extends z.ZodType, RS extends z.ZodType = RQ>(target: string, req: z.input<RQ> | z.infer<RQ>, reqSchema: RQ, resSchema: RS): Promise<z.infer<RS>>;
    upload<RS extends z.ZodType, P extends z.ZodType = z.ZodType>(target: string, body: UploadBody, options: FileOptions<P>, resSchema: RS): Promise<z.infer<RS>>;
    download<RQ extends z.ZodType, P extends z.ZodType = z.ZodType>(target: string, req: z.input<RQ> | z.infer<RQ>, reqSchema: RQ, options: FileOptions<P>): Promise<ReadableStream<Uint8Array>>;
    private context;
    private fetch;
    private decodeError;
}
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