/** data type for user */
export declare type DataType<T> = T | null;
/** error type */
export declare type ErrorType = DataType<any> | Error;
export declare enum actionTypeEnum {
    /** mark before request start status */
    REQUEST_INIT = "REQUEST_INIT",
    /** mark request success status */
    REQUEST_SUCCESS = "REQUEST_SUCCESS",
    /** mark request failure status */
    REQUEST_FAILURE = "REQUEST_FAILURE"
}
/** state */
export interface IState<T> {
    loading?: boolean;
    data?: DataType<T>;
    error?: ErrorType;
}
/** action */
export interface IAction<T> {
    type: keyof typeof actionTypeEnum;
    payload?: DataType<T>;
    error?: ErrorType;
}
/** utility type for unpacking a type */
export declare type Unpacked<T> = T extends (infer U)[] ? U : T extends (...args: any[]) => infer U ? U : T extends Promise<infer U> ? U : T;