import { MaybePartial, StoreApi } from '../vanilla.js';

type ChannelMessage<T> = {
    action: 'write';
    state: MaybePartial<T>;
    replace?: boolean;
} | {
    action: 'sync';
    receiver?: string;
    state: MaybePartial<T>;
    replace?: boolean;
} | {
    action: 'requestSync';
};
type ChannelMessageReceived<T> = ChannelMessage<T> & {
    sender: string;
};
interface ChannelApi<T> extends BroadcastChannel {
    id: string;
    postMessage(message: ChannelMessage<T>): void;
}
interface ChannelStateApi<T> extends StoreApi<T> {
    id: string;
    close(): void;
}
interface CreateChannelStateOptions {
    /** @default true */
    syncOnInit?: boolean;
}
type ChannelStateCreator<T> = (api: ChannelApi<T>) => {
    setupStore(): StoreApi<T>;
    onMessage(message: ChannelMessageReceived<T>): void;
    onInit?(): void;
    onClose?(): void;
};
declare function createChannelStateImpl<TState>(channelName: string, creator: ChannelStateCreator<TState>): ChannelStateApi<TState>;

export { type CreateChannelStateOptions as C, type ChannelStateApi as a, type ChannelMessage as b, type ChannelMessageReceived as c, type ChannelApi as d, type ChannelStateCreator as e, createChannelStateImpl as f };