A lightweight ERC4337 bundler node designed specifically for Node.js environment; with a focus on minimal resource consumption, high performance, and minimal dependencies.

Project status

⚠️ This repository is currently under active development. See our road-map here

✨ Features

• Full Validation - Full spec storage access rules and opcode banning. Requires a connection to a geth node that supports debug_traceCall method.
• Partial Validation - No storage access rules and opcode banning. Use --unsafe flag to enable.
• Metrics - Metrics gives insight into the bundler node to allow for performance tuning and debugging. Transeptor bundler can be be configure to store metrics using a push(InfluxDB) and pull(Prometheus) metrics system. Grafana is used to visualize all the metrics. Use --metrics flag to enable.
• Entity Reputation System - When staked(i.e with entrypoint contract), an entity is also allowed to use its own associated storage, in addition to senders associated storage as ETH. Node can be pre-configured to blacklist and whitelist entities on startup.
• Entrypoint contract - Supports Entrypoint contract releases/v0.7

🚀 Development

Everything you need to get started developing with Transeptor.

Run local development

1. git submodule update --init
2. Use correct node version nvm use
3. Add PRIVATE_KEY to contracts/.env file to deploy the entrypoint contract locally.
4. Install dependencies npm install
5. Start local eth node npm run local-eth - Will also deploy the entrypoint contract please wait for environment vars to be printed in the console and copy it to the .env file.
6. In a new terminal window start the bundler node with live watch for local dev. npm run dev

The bundler will start on http://localhost:4337/rpc. You can now make changes to the code and the bundler will automatically restart. Happy hacking!

Local dev scripts

1. Once the bundler node is running, you can use the run-op script to send a userOp through the bundler. npm run op

Test

npm run test

Lint

npm run lint

or

npm run lint:fix

Build

You can build Transeptor from source or use the Docker image.

🔧 Run from source

1. Use correct node version nvm use
2. Install dependencies npm install
3. Build all packages npm run build
4. Copy values in .env.sample into .env and fill in the values with your own.

Now let's start the bundler node.(make sure to pass your command line arguments)

./transeptor --httpApi web3,eth,debug --txMode base

🐳 Run from Docker image

Build image locally

npm run build:image

Run image locally

npm run start:docker-bundler  

Command line arguments

List of all command line arguments supported by the bundler.

Usage: index [options]

Options:
  -V, --version                  output the version number
  --httpApi <string>             ERC4337 rpc method name spaces to enable. (default: "web3,eth")
  --network <string>             ETH execution client url. (default: "http://localhost:8545")
  --minBalance <string>          Maximum ETH balance need for signer address. (default: "1")
  --maxBundleGas <number>        Max gas the bundler will use in transactions. (default: "5000000")
  --auto                         Automatic bundling. (default: false)
  --autoBundleInterval <number>  Auto bundler interval in (ms). (default: "12000")
  --bundleSize <number>          Maximum number of pending mempool entities to start auto bundler. (default: "10")
  --port <number>                Bundler node listening port. (default: "4000")
  --minStake <string>            Minimum stake a entity has to have to pass reputation system. (default: "1")
  --minUnstakeDelay <number>     Time paymaster has to wait to unlock the stake(seconds). (default: "0")
  --txMode <string>              Bundler transaction mode (base, conditional, searcher). (default: "base")
  --unsafe                       Enable no storage or opcode checks.
  --p2p                          p2p mode enabled (default: false)
  --findPeers                    Search for peers when p2p enabled. (default: false)
  --metrics                      Bundler node metrics tracking enabled. (default: false)
  --metricsPort <number>         Metrics server listening port. (default: "4001")
  --influxdbUrl <string>         Url influxdb is running on (requires --metrics to be enabled). (default:
                                 "http://localhost:8086")
  --influxdbOrg <string>         Influxdb org (requires --metrics to be enabled). (default: "transeptor-labs")
  --influxdbBucket <string>      Influxdb bucket (requires --metrics to be enabled). (default: "transeptor_metrics")
  -h, --help                     display help for command

Environment variables

List of all environment variables supported by the bundler.

# Required for production
TRANSEPTOR_MNEMONIC=<your-mnemonic>
TRANSEPTOR_ENTRYPOINT_ADDRESS=0x
TRANSEPTOR_BENEFICIARY=<address_to_receive_funds>

# Optional
TRANSEPTOR_WHITE_LIST=<address_to_whitelist_SEPARATEDBY_COMMA>
TRANSEPTOR_BLACK_LIST=<address_to_blacklist_SEPARATEDBY_COMMA>
TRANSEPTOR_INFLUX_TOKEN=DEV_TOKEN

Contribute

We welcome contributions to enhance our ERC-4337 Bundler. If you would like to contribute, please follow these guidelines here. There are a few things you can do right now to help out:

• Add tests. There can never be enough tests.

Contact Us

If you have any questions or feedback about the ERC-4337 Bundler project, please feel free to reach out to us.

• Twitter: @transeptorlabs
• Telegram: Telegram channel

License

Licensed under the GPL-3.0 License.

Acknowledgements

We want to express our gratitude to the following individuals and organizations for their contributions and support in making this project possible:

• Infinitism - for inspiring our project and serving as a reference for implementation techniques.

We are grateful to the open-source community and the countless developers who have shared their knowledge and resources, enabling us to build upon their work.

Thank you all for your support!