Vincent Signer Plugin

This plugin was built by a Gemini developer to integrate the Vincent Platform with the Hedera Agent Kit. It was built to enable AI agents to request transaction signatures from a user's Vincent Wallet, allowing for secure, policy-based transaction execution on the Hedera network without exposing private keys to the agent.

This plugin leverages Hedera's EVM compatibility and the Vincent "EVM Transaction Signer" Ability.

Installation

npm install hedera-vincent-signer-plugin # Placeholder package name

Usage

First, you need to import the createVincentSignerPlugin factory function and the necessary configuration types. Then, create an instance of the plugin by providing the required parameters.

import { HederaLangchainToolkit } from 'hedera-agent-kit';
import { createVincentSignerPlugin, VincentSignerToolParams } from './plugins/vincent-signer-plugin'; // Adjust path as needed
import { ethers } from 'ethers';

// 1. Set up your delegatee signer and other params
const delegateeWallet = new ethers.Wallet('YOUR_DELEGATEE_PRIVATE_KEY');
const vincentParams: VincentSignerToolParams = {
  delegateeSigner: delegateeWallet,
  delegatorPkpEthAddress: 'USER_VINCENT_WALLET_ADDRESS', // The user's Vincent Wallet address
  hederaNetwork: 'testnet', // or 'mainnet'
};

// 2. Create the plugin instance using the factory
const vincentPlugin = createVincentSignerPlugin(vincentParams);

// 3. Add the plugin to the HederaLangchainToolkit configuration
 const hederaAgentToolkit = new HederaLangchainToolkit({
    client, // Your configured Hedera client
    configuration: {
      context: {
        mode: AgentMode.AUTONOMOUS,
      },
      plugins: [vincentPlugin], // Add the configured plugin instance
    },
  });

// The agent can now use the 'Sign and Send Transaction with Vincent' tool.

Functionality

This plugin provides a single tool for securely signing and broadcasting transactions.

Vincent Signer Plugin A plugin to sign and send transactions using the Vincent platform.

| Tool Name | Description |Usage | | ----------------------------------------------- | -------------------------------------------------- |--------------------------------------------------------- | | sign_and_send_with_vincent_tool| Signs a transaction using Vincent and broadcasts it to the Hedera network based on a user intent. | intent (object, required): An object describing the transaction to perform. It contains:- action (string, required): The type of action. Can be transfer or contractCall.- to (string, required): The recipient's address.- amount (string, optional): The amount of HBAR to transfer (for transfer action).- data (string, optional): The encoded data for a contract call (for contractCall action). |