@hashgraphonline/standards-agent-kit/dist/es/standards-agent-kit.es21.js

A modular SDK for building on-chain autonomous agents using Hashgraph Online Standards, including HCS-10 for agent discovery and communication.

import { StructuredTool } from "@langchain/core/tools";
import { z } from "zod";
import axios from "axios";
const HEDERA_MIRROR_NODE_API = "https://mainnet.mirrornode.hedera.com/api/v1";
const ExchangeRateResponseSchema = z.object({
  current_rate: z.object({
    cent_equivalent: z.number(),
    hbar_equivalent: z.number(),
    expiration_time: z.number()
  }),
  next_rate: z.object({
    cent_equivalent: z.number(),
    hbar_equivalent: z.number(),
    expiration_time: z.number()
  }),
  timestamp: z.string()
});
class GetHbarPriceTool extends StructuredTool {
  constructor() {
    super(...arguments);
    this.name = "getHbarPrice";
    this.description = "Retrieves the current price of HBAR in USD from the Hedera Mirror Node.";
    this.schema = z.object({});
  }
  // No input required for this tool
  /**
   * 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.
   */
  async _call() {
    try {
      const response = await axios.get(`${HEDERA_MIRROR_NODE_API}/network/exchangerate`);
      const data = response.data;
      const parsedData = ExchangeRateResponseSchema.safeParse(data);
      if (!parsedData.success) {
        console.error("Failed to parse exchange rate response:", parsedData.error);
        throw new Error("Invalid API response format");
      }
      const { current_rate } = parsedData.data;
      const priceUsd = current_rate.cent_equivalent / current_rate.hbar_equivalent / 100;
      return `The current price of HBAR is $${priceUsd.toFixed(6)} USD.`;
    } catch (error) {
      console.error("Error fetching HBAR price:", error);
      let errorMessage = "An unknown error occurred";
      if (axios.isAxiosError(error)) {
        errorMessage = error.message;
        if (error.response) {
          errorMessage += ` (Status: ${error.response.status})`;
        }
      } else if (error instanceof Error) {
        errorMessage = error.message;
      }
      return `Failed to retrieve HBAR price: ${errorMessage}`;
    }
  }
}
class HbarPricePlugin {
  constructor() {
    this.id = "hedera-hbar-price";
    this.name = "Hedera HBAR Price Plugin";
    this.description = "Provides tools to interact with Hedera network data, specifically HBAR price.";
    this.version = "1.0.0";
    this.author = "Hedera Agent";
    this.tools = [new GetHbarPriceTool()];
  }
  /**
   * Initializes the plugin. Currently no specific initialization needed.
   */
  async initialize() {
    return Promise.resolve();
  }
  /**
   * Returns the tools provided by this plugin.
   * @returns An array containing the GetHbarPriceTool.
   */
  getTools() {
    return this.tools;
  }
  /**
   * Cleans up resources. Currently no cleanup needed.
   */
  async cleanup() {
    return Promise.resolve();
  }
}
export {
  GetHbarPriceTool,
  HbarPricePlugin
};
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