import type { EventOperation } from "../factories/types.js";
import { EncryptionMethod } from "../helpers/encrypted-content.js";
/**
 * Sets the hidden content on an event
 * @param content - Plaintext content to encrypt
 * @param signer - EventSigner for encryption
 * @param override - Optional encryption method override
 */
export declare function setHiddenContent(content: string, signer?: import("../factories/types.js").EventSigner, override?: EncryptionMethod): EventOperation;