🌐 Web3 Restful Gateway

A multi-chain Web3 gateway service that provides unified RESTful APIs for blockchain interaction.

🚀 Features

• 🔗 Multi-Chain Support: Seamlessly interact with multiple EVM-compatible blockchains
• 🔄 Real-time Data: Live blockchain data through Infura and Etherscan V2 API
• 🛡️ Battle-tested Security: Basic auth + rate limiting
• 🎯 High Performance: Redis caching for frequently accessed data
• 📊 Gas Optimization: Smart gas estimation and transaction cost prediction

🛠️ Tech Stack

• FastAPI: High-performance async web framework
• Web3.py: Ethereum interaction library
• Etherscan V2: Multi-chain data queries
• Redis: Query result caching
• Pydantic: Data validation and settings management

🔧 Quick Start

Step1: Install the package

pip install web3gateway

Step2: Create a config file and edit it with your credentials

touch config.json

{
    "auth_username": "test_user",
    "auth_password": "test_password",
    "infura_project_id": "your infura project id",
    "etherscan_api_key": "your etherscan api key",
    "redis_url": "redis://localhost:6379",
    "redis_host": "localhost",
    "redis_port": 6379,
    "redis_db": 0,
    "redis_password": "",
    "rate_limit_calls": 5,
    "rate_limit_period": 1,
    "cache_expiration": 10
}

Step3: Make sure you have redis-server installed and running correctly

redis-server

Step4: Start the server

web3gateway -c config.json

Step5: Test the server

curl -X GET "http://localhost:8000/ping"

📦 Development Installation

# Clone the repo
git clone https://github.com/daboooooo/web3gateway.git

# Create virtual environment and install dependencies
cd web3gateway
./setup.sh -i
source .env/bin/activate

# Set up configuration
cp config.json.example config.json
# Edit config.json with your credentials

# Start the server
web3gateway

# Test the server
curl -X GET "http://localhost:8000/ping"

🔥 Core APIs

Transaction Operations

POST /transaction/assemble
POST /transaction/send
POST /transaction/get_receipt

Account Operations

POST /account/balance
POST /account/token_balance
POST /account/txlist

System Operations

GET /ping

🎮 API Examples

Get Account Balance

curl -X POST "http://localhost:8000/account/balance" \
     -H "Content-Type: application/json" \
     -u "test_user:test_password" \
     -d '{
       "chain_id": 1,
       "address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e"
     }'

Response:

{
    "timestamp": 1677654321000,
    "data": {
        "balance": "1234567890000000000"
    }
}

Get Token Balance

curl -X POST "http://localhost:8000/account/token_balance" \
     -H "Content-Type: application/json" \
     -u "test_user:test_password" \
     -d '{
       "chain_id": 1,
       "contractaddress": "0xdac17f958d2ee523a2206206994597c13d831ec7",
       "address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e"
     }'

Response:

{
    "timestamp": 1677654321000,
    "data": {
        "contract address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
        "address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
        "token balance": "150000000"
    }
}

Assemble Transaction

curl -X POST "http://localhost:8000/transaction/assemble" \
     -H "Content-Type: application/json" \
     -u "test_user:test_password" \
     -d '{
       "chain_id": 1,
       "tx_params": {
         "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
         "to": "0x1234567890123456789012345678901234567890",
         "value": "1000000000000000000"
       },
       "gas_level": "normal"
     }'

Response:

{
    "timestamp": 1677654321000,
    "data": {
        "chainId": 1,
        "nonce": 5,
        "gasPrice": "20000000000",
        "gas": 21000,
        "to": "0x1234567890123456789012345678901234567890",
        "value": 1000000000000000000,
        "data": "0x",
        "maxPriorityFeePerGas":492407668,"maxFeePerGas":1632172748
    }
}

You can then sign and send the transaction using the send API.

Get Transaction List

curl -X POST "http://localhost:8000/account/txlist" \
     -H "Content-Type: application/json" \
     -u "test_user:test_password" \
     -d '{
       "chain_id": 1,
       "address": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e"
     }'

Response:

{
    "timestamp": 1677654321000,
    "data": {
        "last transactions": [
            {
                "blockNumber": "17584321",
                "timeStamp": "1677654000",
                "hash": "0xabcd...",
                "from": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
                "to": "0x1234...",
                "value": "1000000000000000000",
                "gas": "21000",
                "gasPrice": "20000000000"
            }
        ]
    }
}

🔌 Supported Networks

• Ethereum Mainnet (ChainID: 1)
• Binance Smart Chain (ChainID: 56)
• Polygon (ChainID: 137)
• Arbitrum (ChainID: 42161)
• Optimism (ChainID: 10)
• And more...

⚡️ Performance

• Response Time: < 100ms (cached)
• Throughput: 1000+ TPS
• Cache Hit Ratio: ~80%

🔒 Security Features

• Basic Authentication
• Rate Limiting
• Input Validation
• Error Handling
• Response Sanitization

🤝 Contributing

PRs are welcome! Check out our contribution guidelines.

📜 License

MIT License - fork, modify and use as you wish.

⚠️ Disclaimer

This is a production-ready gateway but use at your own risk. Always verify transactions before signing.