import { StructuredTool } from '@langchain/core/tools';
import { z } from 'zod';
import { IPlugin } from '../PluginInterface';
/**
 * A Langchain tool to get the current HBAR price in USD.
 */
export declare class GetHbarPriceTool extends StructuredTool {
    name: string;
    description: string;
    schema: z.ZodObject<{}, "strip", z.ZodTypeAny, {}, {}>;
    /**
     * DISCLAIMER: THIS TOOL USES THE EXCHANGE RATE ENDPOINT FROM THE MIRROR NODE, AND IT IS NOT GUARANTEED TO BE ACCURATE.
     * USE AN ORACLE OR OTHER SOURCES FOR PRODUCTION USE WHERE PRICE IS IMPORTANT.
     * Retrieves the current price of HBAR in USD from the Hedera Mirror Node.
     * @returns A promise that resolves to a string containing the current HBAR price in USD.
     */
    protected _call(): Promise<string>;
}
/**
 * DISCLAIMER: THIS PLUGIN USES THE EXCHANGE RATE ENDPOINT FROM THE MIRROR NODE, AND IT IS NOT GUARANTEED TO BE ACCURATE.
 * USE AN ORACLE OR OTHER SOURCES FOR PRODUCTION USE WHERE PRICE IS IMPORTANT.
 * Plugin to provide tools related to Hedera network information, like HBAR price.
 */
export declare class HbarPricePlugin implements IPlugin {
    id: string;
    name: string;
    description: string;
    version: string;
    author: string;
    private tools;
    constructor();
    /**
     * Initializes the plugin. Currently no specific initialization needed.
     */
    initialize(): Promise<void>;
    /**
     * Returns the tools provided by this plugin.
     * @returns An array containing the GetHbarPriceTool.
     */
    getTools(): StructuredTool[];
    /**
     * Cleans up resources. Currently no cleanup needed.
     */
    cleanup(): Promise<void>;
}