/// <reference types="node" />
import * as http from 'http';
import type { WebHookListenerCertificateConfig } from '../WebHookListener';
/** @protected */
export interface CommonConnectionAdapterConfig {
    /**
     * The port the server should listen to.
     */
    listenerPort: number;
    /**
     * The SSL keychain that should be used to make the server available using a secure connection.
     *
     * If this is not given and there is no reverse proxy that handles incoming SSL connections, the server will only be available via HTTP.
     * This means it can **only listen to unauthenticated topics** (stream changes and follows).
     */
    sslCert?: WebHookListenerCertificateConfig;
}
/**
 * Options to override when using a {@ConnectionAdapter} instance.
 */
export interface ConnectionAdapterOverrideOptions {
    defaultHookValidity?: number;
}
/**
 * An abstraction of a WebHook connection adapter.
 */
export declare abstract class ConnectionAdapter {
    private readonly _listenerPort;
    private readonly _ssl?;
    /**
     * Creates a new instance of the connection adapter.
     *
     * @expandParams
     *
     * @param options
     */
    constructor(options: CommonConnectionAdapterConfig);
    /**
     * Creates the HTTP server to use for listening to events.
     *
     * @protected
     */
    createHttpServer(): http.Server;
    /**
     * Whether the connection adapter listens using SSL.
     *
     * @protected
     */
    get listenUsingSsl(): boolean;
    /**
     * The port the HTTP server should listen on.
     *
     * @protected
     */
    getListenerPort(): Promise<number>;
    /**
     * Returns the host name that should be used by Twitch to connect to the server.
     *
     * @protected
     */
    abstract getHostName(): Promise<string>;
    /**
     * Returns the port that should be used by Twitch to connect to the server.
     *
     * @protected
     */
    abstract getExternalPort(): Promise<number>;
    /**
     * Whether to use SSL to connect to the server.
     *
     * This has nothing to do with the SSL configuration given.
     * For example, this can be true when a reverse proxy takes care of SSL and routes to this server internally using plain HTTP.
     *
     * @protected
     */
    abstract get connectUsingSsl(): boolean;
    /**
     * Options to override when using the adapter.
     */
    get overrideOptions(): ConnectionAdapterOverrideOptions;
    /**
     * The path prefix an external connection needs to reach the server.
     *
     * Please note that the layer redirecting to this server needs to strip the path prefix in order for this to work.
     *
     * For example, if this is set to /hooks, an external connection to /hooks/abc should pass /abc as the path to this server.
     *
     * @protected
     */
    get pathPrefix(): string | undefined;
}