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import type { IFileSystemWritableFileStream, FileSystemWritableFileStreamParams, Data, CoreFsaContext } from './types';
import type { Superblock } from '@jsonjoy.com/fs-core';
declare const WS: typeof WritableStream;
/**
* @see https://developer.mozilla.org/en-US/docs/Web/API/FileSystemWritableFileStream
*/
export declare class CoreFileSystemWritableFileStream extends WS implements IFileSystemWritableFileStream {
private _fd;
private _position;
private _closed;
private readonly _core;
private readonly _path;
private readonly _ctx;
constructor(core: Superblock, path: string, keepExistingData: boolean | undefined, ctx: CoreFsaContext);
/**
* @see https://developer.mozilla.org/en-US/docs/Web/API/FileSystemWritableFileStream/seek
*/
seek(position: number): Promise<void>;
/**
* @see https://developer.mozilla.org/en-US/docs/Web/API/FileSystemWritableFileStream/truncate
*/
truncate(size: number): Promise<void>;
/**
* @see https://developer.mozilla.org/en-US/docs/Web/API/FileSystemWritableFileStream/write
*/
write(chunk: Data): Promise<void>;
write(params: FileSystemWritableFileStreamParams): Promise<void>;
private _write;
private _isParams;
private _dataToBuffer;
}
export {};