Flashbots Protect RPC Endpoint

This repository contains code for a server which can be used as an RPC endpoint in popular Ethereum wallets.

The endpoint is live at https://rpc.flashbots.net/

It does two basic things:

• It receives JSON-RPC requests, proxies those to a node, and responds with the result of the proxied request.
• On receiving an eth_sendRawTransaction call which has data and is not on whitelisted methods, the call is sent to the Flashbots relay as a private transaction, and submitted as bundles for up to 25 blocks.

There are a few key benefits to using the Flashbots RPC endpoint:

• Frontrunning protection: your transaction will not be seen by hungry sandwich bots in the public mempool.
• No failed transactions: your transaction will only be mined if it doesn't include any reverts, so you don't pay for failed transactions. Note: your transaction could be uncled, emitted to the mempool, and then included on-chain.
• Priority in blocks: transactions sent via Flashbots are mined at the top of blocks, giving them priority.

Privacy notice: rpc-endpoint does not track, store or log any kind of user information (i.e. IP, location, etc.).

Transaction Status Check

If a transaction is sent to the Flashbots relay instead of the public mempool, you cannot see the status on Etherscan or other explorers. Flashbots provides a Protect Transaction API to get the status of these private transactions: https://protect.flashbots.net/

Usage

To send your transactions through the Flashbots Protect RPC please refer to the quick-start guide.

To run the server, run the following command:

go run cmd/server/main.go -redis REDIS_URL -signingKey ETH_PRIVATE_KEY -proxy PROXY_URL

# For development, you can use built-in redis and create a random signing key
go run cmd/server/main.go -redis dev -signingKey dev -proxy PROXY_URL

# You can use the DEBUG_DONT_SEND_RAWTX to skip sending transactions anywhere (useful for local testing):
DEBUG_DONT_SEND_RAWTX=1 go run cmd/server/main.go -redis dev -signingKey dev -proxy PROXY_URL

Example Single request:

curl localhost:9000 -f -d '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["latest", false],"id":1}'

Contributing

Flashbots is a research and development collective working on mitigating the negative externalities of decentralized economies. We contribute with the larger free software community to illuminate the dark forest.

You are welcome here <3.

• If you want to join us, come and say hi in our Discord chat.
• If you have a question, feedback or a bug report for this project, please open a new Issue.
• We ask you to be nice. Read our code of conduct.

Send a pull request

• Your proposed changes should be first described and discussed in an issue.
• Every pull request should be small and represent a single change. If the problem is complicated, split it in multiple issues and pull requests.
• Every pull request should be covered by unit/e2e tests.

We appreciate your contributions <3

Please install staticcheck (go install honnef.co/go/tools/cmd/staticcheck@master) and run make lint before submitting a PR.

Security

If you find a security vulnerability on this project or any other initiative related to Flashbots, please let us know sending an email to [email protected].

License

The code in this project is free software under the MIT license.

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Made with ☀️ by the ⚡🤖 collective.