default: {
    backend: ((state?: BackendState, action: BroadcastChannelMessage) => BackendState);
    bandwidth: ((state?: {
        bandwidth: {
            maxValue: number;
            remained: number;
        };
    }, action: any) => {
        bandwidth: {
            maxValue: any;
            remained: any;
        };
    });
    currentAccount: Reducer<SliceState>;
    pocket: Reducer<SliceState>;
} = ...