/// <reference types="google-cloud__datastore" />
import { DatastoreLoader } from './loader';
import * as Datastore from '@google-cloud/datastore';
declare const ContextType: unique symbol;
export interface IUser {
    id: string;
    email: string;
    name: string;
    roles?: ReadonlyArray<string>;
}
export declare const Ctxt: (data?: any, ...pipes: (import("@nestjs/common/interfaces/features/pipe-transform.interface").PipeTransform<any, any> | import("@nestjs/common/interfaces/type.interface").Type<import("@nestjs/common/interfaces/features/pipe-transform.interface").PipeTransform<any, any>>)[]) => ParameterDecorator;
export interface Context<User = IUser> {
    datastore: DatastoreLoader;
    user?: User;
    [ContextType]: true;
}
export declare function isContext(value: object): value is Context;
export declare const newContext: (datastore: Datastore) => Context<IUser>;
export declare const transaction: <T>(context: Context<IUser>, callback: (context: Context<IUser>) => Promise<T>) => Promise<T>;
export {};