Automated Market Maker Bot for ApeSwap DEX on Polygon Network

A simple decentralized market-making bot that performs automated trading (buy/sell) on the Polygon network, utilizing ApeSwap as the DEX. This bot is capable of running in different trading modes such as buy-only, sell-only, or both based on user configuration. It adjusts buy and sell amounts randomly between a specified range and uses slippage to ensure trades are executed correctly.

Table of Contents

• Installation
• Configuration
• Usage
• Project Structure
• Features
• Environment Variables
• Important Notes
• License
• Contributing
• Donations

Installation

To install and run this project, follow these steps:

1. Clone the repository:

   git clone https://github.com/davidtacer/mm-dex-web3.git

2. Install the dependencies:

   cd mm-dex-web3
   npm or yarn install

3. Copy .env.sample to .env file or and configure your environment variables (see Environment Variables).

   cp .env.sample .env

4. Start the bot:

   node index.js

Configuration

You can configure the behavior of the bot in the config.js file. This includes trading amounts, trading mode, price thresholds, and more.

Example config.js structure:

module.exports = {
   TRADE_MODE: 'both',  // Options: 'buy', 'sell', 'both'
   INTERVAL: 60000, // 60000 ms = 1 minute interval between checks
   BUY_AMOUNT_MIN: ethers.parseEther('0.0001'), // Min WETH to spend on buying tokens
   BUY_AMOUNT_MAX: ethers.parseEther('0.0005'), // Max WETH to spent on buying tokens
   SELL_AMOUNT_MIN_TOKEN: ethers.parseUnits('0.00005'), // Minimum tokens to sell
   SELL_AMOUNT_MAX_TOKEN: ethers.parseUnits('0.0002'),  // Maximum tokens to sell
   PRICE_THRESHOLDS: {
      BUY_PRICE: 250,   // If price is above this, consider buying
      SELL_PRICE: 250   // If price is below this, consider selling
   },
   SLIPPAGE: 0.01,  // Slippage tolerance: 1%
  
};

Usage

The bot can be run in different modes based on the TRADE_MODE setting in your config.js:

• buy: Only perform buy operations.
• sell: Only perform sell operations.
• both: Perform both buy and sell operations.

Example command:

node index.js

Project Structure

├── config/
│   └── config.js            # Configuration file (set trading behavior)
├── src/
│   ├── trade.js             # Main trading logic (buy/sell based on mode)
│   ├── buy.js               # Buy tokens logic
│   ├── sell.js              # Sell tokens logic
│   └── utils.js             # Helper functions (random amounts, get token price)
├── .env                     # Environment variables (API keys, wallet details)
└── README.md                # Project documentation

Features

• Configurable Trading Behavior: Control the bot's trade mode, buy/sell amounts, and trade intervals.
• Randomized Trading Amounts: Prevent predictable patterns by setting a random amount within a range for each trade.
• Auto Adjusts for Slippage: Ensures that trades are executed successfully even with price slippage.
• Polygon Network Support: Works on the Polygon network using ApeSwap as the DEX.
• Automated Market Making: Runs in an infinite loop checking prices and executing trades based on your configuration.

Environment Variables

You need to configure the following environment variables in a .env file:

PRIVATE_KEY=<your-wallet-private-key>
ALCHEMY_API_KEY=<your-alchemy-api-key>
BASE_TOKEN_ADDRESS=<your-base-token-address>
ERC20_TOKEN_ADDRESS=<your-erc20-token-address>

• ALCHEMY_API_KEY: Your Alchemy API key for connecting to the Polygon network.
• PRIVATE_KEY: The private key of the wallet that will perform trades.
• BASE_TOKEN_ADDRESS: The address of the base token used for trading. For Polygon, this is the WMATIC address: 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270
• ERC20_TOKEN_ADDRESS: The address of the ERC20 token to be traded.

Important Notes

• Ensure your wallet has enough MATIC to cover transaction fees.
• The bot uses MATIC for buying tokens and sells them for MATIC.
• This project is for educational purposes. Use at your own risk when deploying to a live network.

License

This project is open-source under the MIT License.

Contributing

Contributions are welcome! Please follow these steps to contribute:

1. Fork the repository.
2. Create a new branch (git checkout -b feature-branch).
3. Make your changes and commit them (git commit -m 'Add new feature').
4. Push to the branch (git push origin feature-branch).
5. Create a new Pull Request.

Donations

If you find this project useful and would like to support its development, consider making a donation:

• Ethereum (ETH): 0x689C4739E043369c47A4d585Ed5814E3EcaAdEF9
• Polygon (MATIC): 0x689C4739E043369c47A4d585Ed5814E3EcaAdEF9
• Basically any EVM Chain: 0x689C4739E043369c47A4d585Ed5814E3EcaAdEF9

Your support is greatly appreciated and helps keep this project alive!