import { OnMessageDisplayedOutput } from '../types/outputs';
import { OnMessageDisplayedInput } from '../types/inputs';
/**
 * Registers a callback that will be invoked on `messageDisplayed` events.
 *
 * @deprecated AWS will end support for Amazon Pinpoint on October 30, 2026.
 *
 * @param {OnMessageDisplayedInput} input - The input object that holds the callback handler.
 * @throws validation: {@link InAppMessagingValidationErrorCode} - Thrown when the provided parameters or library
 * configuration is incorrect, or if In App messaging hasn't been initialized.
 * @returns {OnMessageDisplayedOutput} - An object that holds a remove method to stop listening to events.
 * @example
 * ```ts
 * onMessageDisplayed((message) => {
 *   // use the message
 * 	 console.log(message.id);
 * });
 * ```
 */
export declare function onMessageDisplayed(input: OnMessageDisplayedInput): OnMessageDisplayedOutput;