import { HttpInterceptor, HttpRequest, HttpHandler } from "@angular/common/http";
import { AuthProvider } from "../../firebase/auth/auth.provider";
/**
 * Interceptor to add Authorization header to requests sent to our cloud functions server.
 * This is a necessary step since our cloud functions validates the client on request.
 */
export declare class AuthInterceptor implements HttpInterceptor {
    auth: AuthProvider;
    constructor(auth: AuthProvider);
    intercept(req: HttpRequest<any>, next: HttpHandler): import("rxjs/Observable").Observable<import("@angular/common/http/src/response").HttpEvent<any>>;
}