import CryptoContext from './crypto.js';
import * as errors from './errors.js';
declare type ErrorSuppressor = errors.CODES | Function;
declare type TryLoadOptions<T> = {
    suppress?: ErrorSuppressor[];
    default?: T;
};
interface Validator<T> {
    (a: unknown): a is T;
}
export declare class SafeStorage<T> {
    private validator;
    private cryptoContext;
    constructor(validator?: Validator<T>, cryptoContext?: CryptoContext);
    private _encrypt;
    private _decrypt;
    _safeLoad(): Promise<unknown>;
    load(): Promise<T>;
    tryLoad<D>(options?: TryLoadOptions<D>): Promise<T | D | undefined>;
    save(data: T): Promise<void>;
}
export { errors };
export default SafeStorage;