import type { NativeFileRef } from "./types.js";
export type SendBody = Blob | Uint8Array<ArrayBuffer> | NativeFileRef;
export interface SendRequest {
    url: string;
    method: "PUT" | "POST";
    headers?: Record<string, string>;
    /** Presigned-POST form fields, appended in order before the file. */
    fields?: Record<string, string>;
    /**
     * `Uint8Array` appears only on runtimes whose `Blob` cannot wrap raw bytes
     * (React Native); both XHR and fetch accept it as a request body directly.
     * A `NativeFileRef` appears only on the presigned-POST path in React
     * Native, whose `FormData` streams the descriptor from disk.
     */
    body: SendBody | null;
    signal?: AbortSignal;
    onProgress?: (loaded: number, total: number) => void;
}
export interface SendResult {
    status: number;
    text: string;
}
export type Transport = (req: SendRequest) => Promise<SendResult>;
export declare const xhrTransport: Transport;
export declare const fetchTransport: (fetchImpl: typeof fetch) => Transport;
/** Default transport: XHR when available (real progress), else fetch. */
export declare const defaultTransport: (fetchImpl: typeof fetch) => Transport;
//# sourceMappingURL=transport.d.ts.map