interface MeshEventEnvelope<TPayload = unknown> {
    readonly id: string;
    readonly app: string;
    readonly type: string;
    readonly payload: TPayload;
    readonly emittedAt: string;
    readonly source?: string;
}
type MeshEventHandler<TPayload = unknown> = (event: MeshEventEnvelope<TPayload>) => void | Promise<void>;
interface MeshEventBus {
    emit<TPayload>(type: string, payload: TPayload, source?: string): Promise<MeshEventEnvelope<TPayload>>;
    on<TPayload>(type: string, handler: MeshEventHandler<TPayload>): () => void;
}
declare class MemoryMeshEventBus implements MeshEventBus {
    private readonly app;
    private readonly emitter;
    constructor(app: string);
    emit<TPayload>(type: string, payload: TPayload, source?: string): Promise<MeshEventEnvelope<TPayload>>;
    on<TPayload>(type: string, handler: MeshEventHandler<TPayload>): () => void;
}

export { MemoryMeshEventBus as M, type MeshEventBus as a, type MeshEventEnvelope as b, type MeshEventHandler as c };