import { MessageData, OutputMessageItem } from '../types';
export declare const SET_MESSAGE_DATA = "SET_MESSAGE_DATA";
export declare const ADD_MESSAGE = "ADD_MESSAGE";
/**
 * Store `messageData` to state for future stages to utilize.
 * Override previous turn's `messageData`.
 */
export declare const setMessageData: (messageData: MessageData) => {
    type: string;
    payload: MessageData;
};
/**
 * Add a message output that should be presented to the user.
 * Developer will have access to this message list.
 */
export declare const addMessage: (message: OutputMessageItem) => {
    type: string;
    payload: OutputMessageItem;
};
/**
 * Clear output message array on state
 * POSTCONDITION: empty array
 */
export declare const CLEAR_MESSAGE_QUEUE = "CLEAR_MESSAGE_QUEUE";
export declare const clearMessageQueue: () => {
    type: string;
};