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>;
    body: Blob | 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