import { Events } from 'mezon-sdk';
export declare const NEZON_EVENT_METADATA = "nezon:event";
export declare const NEZON_EVENT_ONCE_METADATA = "nezon:event:once";
export declare const NEZON_MENTION_EVENT = "nezon:mention";
/**
 * Subscribes a method to a Mezon event. The handler is invoked every time the event fires.
 *
 * @param event Event enum value from `Events` (e.g. `Events.ChannelMessage`, `Events.TokenSend`).
 *
 * @example
 * ```ts
 * @On(Events.ChannelMessage)
 * async onMessage(@ChannelMessagePayload() message: Nezon.ChannelMessage) {
 *   console.log('Incoming message:', message.content.t);
 * }
 * ```
 */
export declare function On(event: Events | string): MethodDecorator;
/**
 * Subscribes a method to a Mezon event but automatically removes the handler after the first call.
 *
 * @param event Event enum value from `Events` (e.g. `Events.Ready`, `Events.ChannelCreated`).
 *
 * @example
 * ```ts
 * @Once(Events.Ready)
 * onReady() {
 *   console.log('Bot is ready!');
 * }
 * ```
 */
export declare function Once(event: Events | string): MethodDecorator;
export declare function OnMention(): MethodDecorator;