export namespace SERVICE_ACTOR_KEYS {
    const AUTHN: string;
    const RESULTS: string;
    const SNAPSHOT: string;
    const UPDATED: string;
    const UPDATE_RESULTS: string;
}
export default authn;
export type Service = import("@onflow/typedefs").Service;
export type SubscriptionCallback = () => Service[];
export type Authn = {
    /**
     * - Subscribe to Discovery authn services
     */
    subscribe: Function;
    /**
     * - Get the current Discovery authn services spanshot
     */
    snapshot: Function;
    /**
     * - Trigger an update of authn services
     */
    update: Function;
};
declare namespace authn {
    function subscribe(cb: Function): SubscriptionCallback;
    function snapshot(): import("@onflow/typedefs").Service[];
    function update(): void;
}