import * as i0 from '@angular/core';
import { InjectionToken, Provider } from '@angular/core';
import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent, HttpInterceptorFn } from '@angular/common/http';
import { Observable } from 'rxjs';

type GetAuthorization = () => Promise<string | null> | Observable<string | null>;
declare const AUTHORIZATION: InjectionToken<GetAuthorization>;
declare class AuthorizationInterceptor implements HttpInterceptor {
    private getAuth;
    intercept(req: HttpRequest<unknown>, next: HttpHandler): Observable<HttpEvent<unknown>>;
    private getRequestWithToken;
    static ɵfac: i0.ɵɵFactoryDeclaration<AuthorizationInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AuthorizationInterceptor>;
}
declare function authorizationInterceptor(isAuthorizedRequest?: (req: HttpRequest<unknown>) => boolean): HttpInterceptorFn;
declare function provideAuthorization(useFactory: () => GetAuthorization): Provider;

export { AUTHORIZATION, AuthorizationInterceptor, authorizationInterceptor, provideAuthorization };
export type { GetAuthorization };