User: hi
Assistant: Hello! How can I assist you today?
User: what are you doing
Assistant: I'm here to help answer your questions and provide information. What can I do for you today?
User: please code a amm bot that can proceed buy and sell on a specific percentage of price change, using viem and node js
Assistant: To create an Automated Market Maker (AMM) bot in Node.js that can execute buy and sell orders based on a specific percentage of price change, you'll need to interact with a blockchain (likely Ethereum) and use a JavaScript library such as Viem or ethers.js. Below is a simplified example of how you might approach writing such a bot. Note that this example will require further development for deployment and handling edge cases.

Before you start, ensure you have Node.js installed and set up a project with required packages using npm or yarn.

```bash
npm init -y
npm install viem dotenv
```

Now, let's write a basic script:

```javascript
require('dotenv').config();
const { createPublicClient, http } = require('viem');
const { mainnet } = require('viem/chains');

// Initialize client
const client = createPublicClient({
  chain: mainnet,
  transport: http(process.env.RPC_URL),
});

// Configuration parameters
const WATCHED_TOKEN_ADDRESS = '0x...'; // Replace with the actual token address
const THRESHOLD_PERCENTAGE = 1; // Percentage change threshold for buy/sell
const INITIAL_PRICE = 100; // Set this to the current price when deploying
let lastCheckedPrice = INITIAL_PRICE;

// Function to fetch token price (mock/demo function)
async function getTokenPrice(tokenAddress) {
  // You'll need a real method to get the token price here
  // Could be from an exchange API, or on-chain oracle
  return 100; // Mock price for demonstration
}

// Function to execute a trade
async function executeTrade(action, amount) {
  // Implement trade logic here (e.g., interact with Uniswap, SushiSwap)
  console.log(`${action.toUpperCase()} ${amount} tokens.`);
}

// Main loop for the bot
async function runBot() {
  try {
    const currentPrice = await getTokenPrice(WATCHED_TOKEN_ADDRESS);

    const priceDifference = ((currentPrice - lastCheckedPrice) / lastCheckedPrice) * 100;

    if (priceDifference >= THRESHOLD_PERCENTAGE) {
      // Execute a sell order
      await executeTrade('sell', 10); // Example amount
      lastCheckedPrice = currentPrice;
    } else if (priceDifference <= -THRESHOLD_PERCENTAGE) {
      // Execute a buy order
      await executeTrade('buy', 10); // Example amount
      lastCheckedPrice = currentPrice;
    }

    console.log(`Current price: ${currentPrice}, Last checked: ${lastCheckedPrice}, Difference: ${priceDifference}%`);
  } catch (error) {
    console.error('Error in running bot:', error);
  }
}

// Set an interval to continuously run the bot
setInterval(runBot, 60000); // Checks every minute
```

### Note:
1. **Get Token Price**: Implement a proper method to fetch token prices from an API or a decentralized oracle.
2. **Execute Trade**: You'll need to include actual logic to interact with decentralized exchanges (DEX) like Uniswap, involving signing transactions and handling gas fees.
3. **Security & Testing**: Ensure extensive testing and implement safety checks for transactions. Never expose private keys or sensitive information.
4. **Environment Variables**: Store sensitive data like RPC URLs and private keys in a `.env` file and load them using dotenv. Your `.env` may look like this:
   ```plaintext
   RPC_URL=https://mainnet.infura.io/v3/YOUR_INFURA_KEY
   PRIVATE_KEY=your-private-key
   ```
5. **Real-World Deployment**: Deploy on a more secure and scalable setup like AWS or Azure managed services, and monitor for erratic behaviors.
User: do i need smart contract for this?
Assistant: For the basic functionality you've described—executing buy and sell orders based on percentage changes in token prices—you do not necessarily need to write a new smart contract. This kind of bot can operate by interacting directly with existing decentralized exchange (DEX) smart contracts, such as those on Uniswap, SushiSwap, or similar platforms, using their public interfaces.

However, there are a few considerations where a smart contract might come into play:

1. **Aggregating Trades**: If you're looking to optimize transaction costs or execute complex strategies that involve multiple tokens or exchanges, you might deploy a custom smart contract that aggregates these actions efficiently.

2. **Security and Automation**: A smart contract can ensure that your trading logic is secure and private keys are not exposed. However, this requires comprehensive audits and security practices.

3. **Additional Features**: If your strategy involves more complex logic, such as handling arbitrage opportunities, advanced risk management, or liquidity provision, a custom smart contract can encapsulate this logic.

In summary, for straightforward buy/sell based on price triggers, interacting directly with existing DEX contracts via a script is sufficient. If your strategy grows in complexity, you might consider involving smart contract development. Always remember to test thoroughly and consider engaging with security audits when working with contracts that handle funds.
User: because i will have to save the last traded price
Assistant: