import { IAppConstructor } from "../app";
export interface ICookieSource {
    query(url: string): AsyncIterable<{
        name: string;
        value: string;
    }>;
}
export interface ILocalStorageSource {
    readAll(url: string): AsyncIterable<{
        key: string;
        value: string;
    }>;
}
export interface IConfigSource {
    cookies: ICookieSource;
    storage: ILocalStorageSource;
}
export interface IConfigurable<TConfig> {
    extractConfig(source: IConfigSource): Promise<Partial<TConfig> | undefined>;
}
export interface IConfigurableApp<TConfig> extends IAppConstructor<any, any> {
    configurable: IConfigurable<TConfig>;
}
export declare function isConfigurable<Opts extends []>(app: IAppConstructor<Opts, any>): app is IConfigurableApp<Opts>;