import { SlackMessage } from './types/SlackMessage';
import { HttpResponse } from '@libj/http';
interface Options {
    extraHooks?: {
        [key: string]: string;
    };
}
interface SendOptions {
    hook?: string;
}
export declare class SlackWebhook {
    constructor(defaultHook: string, opts?: Options);
    /*** Public ***/
    send(message: SlackMessage, opts?: SendOptions): Promise<HttpResponse>;
    private readonly http;
    private readonly defaultHook;
    private readonly opts;
    /*** Private ***/
    /**
     * Only works for section blocks currently.
     */
    private trimLongMessageTexts;
    private getExtraHookUrl;
}
export {};