import * as Promise from 'bluebird';
export declare const types: {
    postgres: string;
    mysql: string;
    websql: string;
    odata: {
        name: string;
    };
};
export declare const validateSync: (value: string) => string;
export declare const validate: (arg1: any, arg2: boolean) => Promise<string | null>;
export declare const compare: (arg1: string, arg2: string) => Promise<boolean>;