import { grpc } from "@improbable-eng/grpc-web";
export declare const host = "http://0.0.0.0:6002";
export declare function promise<U, V, W>(handler: (callback: (error: V | null, resp: U | null) => void) => void, mapper: (resp: U) => W): Promise<W>;
export declare const useTokens: (initialToken?: string | undefined, initialAdminToken?: string | undefined) => Readonly<{
    getMeta: () => grpc.Metadata;
    getHeaders: () => Record<string, string>;
    setToken: (t: string) => void;
    setAdminToken: (t: string) => void;
}>;
export declare const getTransport: () => grpc.TransportFactory;