import { WASIFS } from "../types.js";
import { DebugFn } from "./wasi.js";
export type WASIContextOptions = {
    fs: WASIFS;
    args: string[];
    env: Record<string, string>;
    stdin: (maxByteLength: number) => string | null;
    stdout: (out: string) => void;
    stderr: (err: string) => void;
    debug: DebugFn;
    isTTY: boolean;
};
/**
 * WASIContext
 *
 * The context in which a WASI binary is executed.
 * This is used for syscalls that get args, environment, use IO and read/write
 * to files. This gives you programmattic access to the environment that the
 * WASI binary is executing in.
 *
 * Notes:
 *
 * stdin - string is passed as JavaScript string but encoded to UTF-8, if this
 *         ends up longer than maxByteLength it will be truncated.
 *
 * debug - function injected between wasi and return for debugging
 *
 */
export declare class WASIContext {
    fs: WASIFS;
    args: string[];
    env: Record<string, string>;
    stdin: WASIContextOptions["stdin"];
    stdout: WASIContextOptions["stdout"];
    stderr: WASIContextOptions["stderr"];
    debug?: WASIContextOptions["debug"];
    isTTY: WASIContextOptions["isTTY"];
    constructor(options?: Partial<WASIContextOptions>);
}