/**
 * A function that takes an email address and returns a Promise with the subscription status: true
 * for success, false for failure.
 *
 * @param {string} emailAddress
 * @return {Promise<boolean>}
 */
export declare type SubscribeFunction = (emailAddress: string) => Promise<boolean>;
export declare const API_ENDPOINT = "https://proxy.mycryptoapi.com/mc";
/**
 * `useSubscribe` hook which returns a subscribe function.
 *
 * @param {string} listId
 * @param {string} tag
 * @return {SubscribeFunction}
 */
export declare const useSubscribe: (listId: string, tag: string) => SubscribeFunction;