import type { ClientMessage } from "../types";
/**
 * Reaction API object
 *
 * @group Reaction
 */
export default class Reaction implements ClientMessage {
    /**
     * The message's id to react to
     */
    message_id: string;
    /**
     * The reaction emoji
     */
    emoji: string;
    get _type(): "reaction";
    /**
     * Create a Reaction object for the API
     *
     * @param message_id - The message's id (wamid) to react to
     * @param emoji - The emoji to react with, defaults to empty string to remove a reaction
     * @throws If message_id is not provided
     * @throws If a non-emoji or more than one emoji is provided
     */
    constructor(message_id: string, emoji?: string);
    _build(): string;
}
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