export declare const NO_ADMIN_EMAIL = -400100;
export declare const TEST = -11;
export declare const UNKNOWN = -12;
export declare const PERMISSION_DENIED_ADMIN_ONLY = -10;
export declare const NO_EMAIL = -50;
export declare const NO_PASSWORD = -51;
export declare const NO_NAME = -52;
export declare const NO_UID = -53;
export declare const UID_TOO_LONG = -54;
export declare const UID_CANNOT_CONTAIN_SLASH = -55;
export declare const TYPE_CHECK = -40010;
export declare const NO_DOCUMENT_ID = -40025;
export declare const DOCUMENT_ID_TOO_LONG = -40026;
export declare const DOCUMENT_ID_CANNOT_CONTAIN_SLASH = -40027;
export declare const WRONG_GENDER = -40061;
export declare const WRONG_ROUTE = -40060;
export declare const EMPTY_ROUTE = -40063;
export declare const WRONG_METHOD = -40064;
export declare const ANONYMOUS_CANNOT_EDIT_PROFILE = -40070;
export declare const USER_ID_NOT_EXISTS_IN_USER_COLLECTION = -40020;
export declare const MUST_BE_A_NUMBER = -400204;
export declare const MUST_BE_AN_ARRAY = -400205;
export declare const MUST_BE_AN_OBJECT = -400206;
export declare const MUST_BE_A_BOOLEAN = -400207;
export declare const MUST_BE_A_STRING = -400208;
export declare const DOCUMENT_ID_DOES_NOT_EXISTS_FOR_GET = -40004;
export declare const DOCUMENT_ID_DOES_NOT_EXISTS_FOR_GET_IN_TRANSACTION = -40006;
export declare const DOCUMENT_ID_DOES_NOT_EXISTS_FOR_UPDATE = -40008;
export declare const USER_NOT_LOGIN = -400210;
export declare const NO_USER_DOCUMENT_ID = -400220;
export declare const FAILED_TO_VERIFY_USER = -400230;
export declare const FAILED_TO_CREATE_ANONYMOUS = -400232;
export declare const SYSTEM_ALREADY_INSTALLED = -400240;
export declare const COLLECTION_IS_NOT_SET = -400250;
export declare const EMPTY_POST_BODY = -40301;
export declare const NO_POST_ID = -40353;
export declare const POST_ID_TOO_LONG = -40354;
export declare const POST_ID_CANNOT_CONTAIN_SLASH = -40355;
export declare const POST_ALREADY_EXISTS = -40357;
export declare const ANONYMOUS_PASSWORD_IS_EMPTY = -40356;
export declare const ANONYMOUS_WRONG_PASSWORD = -40357;
export declare const NOT_YOUR_POST = -40358;
export declare const NOT_OWNED_BY_ANONYMOUS = -40359;
export declare const CATEGORY_ID_CANNOT_CONTAIN_SLASH = -40445;
export declare const ANONYMOUS_CANNOT_CREATE_CATEGORY = -40449;
export declare const CATEGORY_ALREADY_EXISTS = -40450;
export declare const CATEGORY_ID_TOO_LONG = -40454;
export declare const NO_CATEGORY_ID = -40460;
export declare const WRONG_CATEGORY_ID = -40462;
export declare const POST_CATEGORY_DOES_NOT_EXIST = -40464;
export declare const FIREBASE_CODE = -40900;
export declare const FIREBASE_AUTH_UID_ALREADY_EXISTS = -40901;
export declare const FIREBASE_ID_TOKEN_EXPIRED = -40902;
export declare const FIREBASE_FAILED_TO_DECODE_ID_TOKEN = -40905;
export declare const FIREBASE_INVALID_PASSWORD = -40906;
export declare const FIREBASE_DO_NOT_ACCEPT_UNDEFINED = -40907;
export declare const SYSTEM_NOT_INSTALLED = -400501;
export declare const DOCUMENT_ID_DOES_NOT_EXISTS_FOR_GET_SETTINGS_DOCUMENT = -400502;
/**
 *
 *
 * @since 2018-02-26. `code` must be a number and it MUST be less than 0.
 * @desc `code` must be a number less than 0.
 * @desc When `Firestore` throws error, the error code is usually bigger than 0 and sometimes it is evena  string like `auth/uid-already-exists`.
 *  We will convert it into our ERROR CODE.
 *
 * @desc So, if the `code` is number and less than 0, then it's an error. otherwise. it's not an error.
 *
 *      if `code` is one of below, it's not an error.
 *      - a falsy value
 *      - string
 *      - number that is bigger than or equal to 0
 *
 * @desc When `BACKEND_ERROR_OBJECT` is discussed, it means `Backend Error Object`.
 *          While `Error Object` is stated, it means an Error Object that is any kind of error object.
 *              - It can be a `Backend Error Object` or `Firebase Error Object` or `Javascript Error Object`.
 *
 *
 */
export interface BACKEND_ERROR_OBJECT {
    code: number;
    message?: string;
}
/**
 * Returns true if the input is an Error Object.
 * @desc It may be a Firebase erorr object or Simple Javascript error objct.
 *          - Meaning, if `code` property exists and none falsy value, it returns true.
 *          - This conflicts the concept of `BACKEND_ERROR_OBJECT`.
 *          - the code of `BACKEND_ERROR_OBJECT` object can only hold number that is less than 0.
 *          - while the code of Error Object can hold any value. number or string.
 *
 * @param o any value. May be an Error Object.
 *
 */
export declare function isErrorObject(o: any): boolean;
/**
 *
 * Returns `BACKEND_ERROR_OBJECT` from a number or `Firebase error object`.
 *
 * @param code It may be a ERROR CODE or a `Error Object`.
 *
 *          - If `Firestore Error Object` or `Javascript Error Object` was given, then it will be replaced as BACKEND_ERROR_OBJECT.
 *
 * @return
 *      - If the input is falsy value return the input is retuerned as it is.
 *      - if the input is not a number or Error Object, then the input is returned as it is.
 *      - Otherwise, Backend Error Object is returned.
 */
export declare function obj(code: any, info?: object): BACKEND_ERROR_OBJECT;