import { type SendMessage } from "./dependencies";
import type { FileTransferOptions, FileTransferControl } from "./types/transfer";
declare class FileSender {
    private activeTransfers;
    private instanceId;
    private sendMessage;
    constructor(instanceId: string, sendMessage: SendMessage);
    sendFile(file: File, options?: FileTransferOptions): FileTransferControl;
    private performFileTransfer;
    cancelTransfer(fileId: string): Promise<void>;
    private sendFileTransferRequest;
    private sendChunks;
    private sendChunk;
    private sendCompletionMessage;
    private updateProgress;
    private handleError;
    private cleanup;
    private generateFileId;
    private delay;
    private getTransferList;
}
declare function getFileSender(instanceId: string): FileSender | undefined;
declare function createFileSendFunction(instanceId: string): (file: File, options?: FileTransferOptions) => FileTransferControl | undefined;
declare function cleanupFileSender(instanceId: string): void;
export { cleanupFileSender, createFileSendFunction, getFileSender };