import { HCS10Client } from '../hcs10/HCS10Client';
import { StructuredTool } from '@langchain/core/tools';
import { z } from 'zod';
/**
 * SendMessageTool wraps the sendMessage() function of HCS10Client.
 * It sends a message to a specified Hedera topic and monitors for responses.
 */
export declare class SendMessageTool extends StructuredTool {
    name: string;
    description: string;
    private client;
    private lastProcessedTimestamp;
    private logger;
    schema: z.ZodObject<{
        topicId: z.ZodString;
        message: z.ZodString;
        disableMonitoring: z.ZodOptional<z.ZodBoolean>;
    }, "strip", z.ZodTypeAny, {
        message: string;
        topicId: string;
        disableMonitoring?: boolean | undefined;
    }, {
        message: string;
        topicId: string;
        disableMonitoring?: boolean | undefined;
    }>;
    /**
     * @param client - Instance of HCS10Client.
     */
    constructor(client: HCS10Client);
    /**
     * Calls sendMessage() with the provided parameters.
     */
    _call(input: {
        topicId: string;
        message: string;
        disableMonitoring: boolean;
    }): Promise<string>;
    private monitorResponses;
}