import * as t from 'io-ts';
import { O } from './utils/fp';
import { Observable } from 'rxjs';
export interface Store {
    /** get string for key */
    get: (k: string) => O.Option<string>;
    /** set string for key */
    set: (k: string, a: string) => void;
    /** delete string for key */
    clear: (k: string) => void;
}
export interface StoreEntry<A> {
    get: () => O.Option<A>;
    set: (a: A) => void;
    clear: () => void;
    observe: () => Observable<O.Option<A>>;
}
export interface DataWrapper<A, Wrapped> {
    wrap: (a: A) => Wrapped;
    unwrap: (a: Wrapped) => A;
    wrapCodec: (a: t.Type<A>) => t.Type<Wrapped>;
}
export interface InitEntryFactoryPayload<A, Wrapped> {
    wrapper: DataWrapper<A, Wrapped>;
    validate: (a: Wrapped) => boolean;
}
export interface InitEntryPayload<A> {
    /** key used in key-value storage */
    key: string;
    /** codec used to validate data type */
    codec: t.Type<A>;
    /** IO entry */
    store: Store;
}
export interface InitEntryWithExpiryPayload<A> extends InitEntryPayload<A> {
    /** expiration time, in mileseconds */
    expiry: number;
}