export declare class MeshOfflineError extends Error {
    constructor(message?: string);
}
export type Reply = {
    id: string;
    ok: boolean;
    [k: string]: unknown;
};
export interface CallOptions {
    dir?: string;
    timeoutMs?: number;
}
/** One request/reply over the hub socket. Any transport failure is MeshOfflineError. */
export declare function meshCall(req: Record<string, unknown>, o?: CallOptions): Promise<Reply>;
/**
 * meshCall, starting the hub on first use. Throws MeshOfflineError if it never comes up.
 *
 * A hub that cannot start (missing native module, squatted lock) must not turn every heartbeat
 * and every `mesh_who` into a new process and a multi-second wait: spawns are rate limited per
 * directory, and after a failed start-up further calls fail fast for `failCooldownMs`.
 */
export declare function callWithHub(req: Record<string, unknown>, o?: CallOptions & {
    spawnHub?: (dir: string) => void;
    retries?: number;
    retryDelayMs?: number;
    spawnBackoffMs?: number;
    failCooldownMs?: number;
}): Promise<Reply>;
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