Ethereum Deposit Contract Processing Script

Overview

This Node.js script facilitates the processing of Ethereum deposit data. It reads deposit data from a file, interacts with an Ethereum deposit contract, and executes deposit transactions. The script includes features like environment variable-based configuration, transaction locking to prevent double processing, and comprehensive logging.

Features

• Processes deposit data from a specified file.
• Connects to Ethereum nodes via JSON-RPC using the ethers.js library.
• Handles deposit transactions with a given Ethereum deposit contract.
• Utilizes environment variables for secure configuration.
• Implements a locking mechanism to prevent duplicate transactions.
• Logs detailed information about each transaction, including errors.

Requirements

• Node.js
• npm (Node Package Manager)
• An Ethereum node accessible via JSON-RPC
• A funded Ethereum wallet

Installation

Ensure Node.js and npm are installed on your system. Then, install the required dependencies using npm:

npm install
cp .env-example .env

Configuration

Set up the .env file in the project root, based on .env-example. Configure these variables:

• PROVIDER_URL: URL of the Ethereum JSON-RPC node.
• PRIVATE_KEY: Private key of your Ethereum wallet.
• CONTRACT_ADDRESS: Address of the Ethereum deposit contract.

For transaction configuration, set (optionally):

• GAS_LIMIT: Maximum gas for transactions.
• GAS_PRICE: Gas price in Gwei.

Usage

Run the script with a file containing deposit data as an argument:

node sendByFile.js <file_path>

The script will:

1. Read deposit data from the provided file.
2. Connect to the Ethereum network.
3. Process each deposit entry:
   • Check for an existing lock file.
   • Create a transaction with deposit details.
   • Send the transaction to the network.
   • Create a lock file on successful transaction sending.
4. Log transaction details and errors.

File Format

The script expects a JSON file with an array of deposit data objects. Each object should include:

• pubkey
• withdrawal_credentials
• amount
• signature

Locking Mechanism

To prevent processing the same deposit data multiple times, the script uses a locking mechanism:

• Checks for a .lock file associated with each pubkey.
• Creates a .lock file after successfully processing a transaction.

Disclaimer

This script is for educational and development purposes. Test thoroughly in a safe environment before production use. Secure your private key and sensitive details.

License

MIT

Contributing

Contributions are welcome. Please follow standard coding practices and submit pull requests for enhancements or fixes.