import { fork } from 'node:child_process';
import { EventEmitter } from 'node:events';
import type { App } from '@t4h.framework/core';
export type AppManifest = ReturnType<App['toManifest']>;
export type AppProcessState = 'idle' | 'starting' | 'ready' | 'exited';
export declare class AppProcessNotReadyError extends Error {
    readonly name = "AppProcessNotReadyError";
}
export interface AppProcessOptions {
    workerPath?: string;
    readyTimeoutInMs?: number;
    killTimeoutInMs?: number;
    fork?: typeof fork;
}
export interface AppProcessUpOptions {
    /** Public origin of the HTTP server in front of this process; webhooks build callback URLs on it. */
    serverUrl?: string;
}
export declare class AppProcess extends EventEmitter {
    private readonly workerPath;
    private readonly readyTimeoutInMs;
    private readonly killTimeoutInMs;
    private readonly forkProcess;
    private readonly server;
    private child;
    private client;
    private ready;
    private currentManifest;
    private currentState;
    constructor({ workerPath, readyTimeoutInMs, killTimeoutInMs, fork: forkProcess, }?: AppProcessOptions);
    get manifest(): AppManifest | null;
    get state(): AppProcessState;
    up(entrypoint: string, env: Record<string, string>, { serverUrl }?: AppProcessUpOptions): Promise<AppManifest>;
    down(): Promise<void>;
    private kill;
    whenReady(): Promise<AppManifest>;
    call(method: string, ...params: unknown[]): Promise<unknown>;
    private onManifest;
    private onExit;
}