import { IEncryptModel, IKeystoreModel, IKeypairsModel } from "../types";
export declare const isEmptyPlainObject: (obj: any) => boolean;
/**
 * decrypt wallet with password
 *
 * @param {string} password
 * @param {IKeystoreModel} encryptData
 * @returns {(string)} return secret if success, otherwise throws `keystore is invalid` if the keystore is invalid or
 * throws `password is wrong` if the password is wrong
 */
declare const decrypt: (password: string, encryptData: IKeystoreModel) => Promise<Buffer>;
/**
 * encrypt data with password
 *
 * @param {string} password
 * @param {string} data
 * @param {IEncryptModel} [opts={}]
 * @returns {IKeystoreModel}
 */
declare const encrypt: (password: string, data: string, opts: IEncryptModel) => Promise<IKeystoreModel>;
declare const encryptContact: (password: string, contacts: any, opts?: IEncryptModel) => Promise<IKeystoreModel>;
declare const encryptWallet: (password: string, keypairs: IKeypairsModel, opts?: IEncryptModel) => Promise<IKeystoreModel>;
export { decrypt, encrypt, encryptContact, encryptWallet };