import { Transaction } from './transaction';
import { Observable } from './observable';
export declare type Setter<State> = (value: State) => State;
export declare type Set<State> = (setter: State | Setter<State>, transaction?: Transaction) => void;
export interface AtomDefaultActions<State> {
    set: Set<State>;
}
export interface Atom<State, Actions extends {} = AtomDefaultActions<State>> extends Observable<State> {
    actions: Actions;
}
export interface AtomOptions<State, Actions extends {} = AtomDefaultActions<State>> {
    actions: (set: Set<State>) => Actions;
}
export declare const atom: <State, Actions extends {} = AtomDefaultActions<State>>(defaultValue: State, options?: AtomOptions<State, Actions> | undefined) => Atom<State, Actions>;