Token Auto Buy/Sell Application

A production-ready Node.js application for automatically buying and selling tokens via PancakeSwap (BSC) and Jupiter (Solana).

Features

• ✅ BSC Integration: Buy/sell tokens using PancakeSwap
• ✅ Solana Integration: Buy/sell tokens using Jupiter DEX aggregator
• ✅ Transaction Signing: Real blockchain transaction execution
• ✅ Slippage Protection: 5% slippage tolerance
• ✅ Error Handling: Comprehensive error management
• ✅ Production Ready: Proper logging, validation, and security

Prerequisites

• Node.js 18+
• npm or yarn
• BSC wallet with BNB for gas fees
• Solana wallet with SOL for gas fees

Installation

1. Clone the repository:

git clone <repository-url>
cd token-auto-buy

2. Install dependencies:

npm install

3. Set up environment variables:

cp .env.example .env

4. Configure your environment variables in .env:

# BSC Configuration
WALLET_PRIVATE_KEY=0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef
BSC_RPC_URL=https://bsc-dataseed.binance.org

# Solana Configuration
SOLANA_PRIVATE_KEY=[1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64]
SOLANA_RPC_URL=https://api.mainnet-beta.solana.com

Usage

Start the server:

npm run dev  # Development mode
npm run build && npm start  # Production mode

API Endpoint

POST /api/trade

Request body:

{
  "amount": "0.1",
  "type": "buy",
  "contractAddress": "0x1234567890abcdef1234567890abcdef12345678",
  "network": "BSC",
  "recipient": "0x1234567890abcdef1234567890abcdef12345678"
}

Response:

{
  "success": true,
  "message": "Trade executed successfully",
  "data": {
    "hash": "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef",
    "status": "success"
  }
}

Supported Networks

• BSC: Binance Smart Chain using PancakeSwap
• SOLANA: Solana using Jupiter DEX aggregator

Supported Operations

• Buy: Purchase tokens with native currency (BNB/SOL)
• Sell: Sell tokens for native currency (BNB/SOL)

Testnet Testing

BSC Testnet

BSC_RPC_URL=https://data-seed-prebsc-1-s1.binance.org:8545
BSC_CHAIN_ID=97
PANCAKESWAP_ROUTER=0xD99D1c33F9fC3444f8101754aBC46c52416550D1

Solana Devnet

SOLANA_RPC_URL=https://api.devnet.solana.com

Get Testnet Tokens

• BSC Testnet: BSC Testnet Faucet
• Solana Devnet: Solana Faucet

Security Features

• ✅ Private key validation
• ✅ Address validation
• ✅ Amount validation
• ✅ Slippage protection (5%)
• ✅ Gas limit protection
• ✅ Transaction confirmation
• ✅ Comprehensive error handling

Error Handling

The application includes comprehensive error handling for:

• Invalid wallet configuration
• Insufficient balances
• Network errors
• Transaction failures
• Invalid addresses
• Invalid amounts

Development

Project Structure

src/
├── config/          # Network configurations
├── controllers/     # API controllers
├── helpers/         # Utility functions
├── middleware/      # Express middleware
├── routes/          # API routes
├── services/        # Trading services
├── types/           # TypeScript types
└── validators/      # Input validation

Building

npm run build

Testing

npm test

Production Deployment

1. Set NODE_ENV=production in your environment
2. Use a secure RPC provider
3. Ensure proper wallet security
4. Monitor gas fees and slippage
5. Set up proper logging and monitoring

License

ISC