/mev-share-ctf-rs

Primary LanguageRust

Flashbot's MEV-Share CTF Solution/Client in Rust

A simple MEV-Share client written in Rust for Flashbot's MEV-Share CTF 😁.

How It Works

Ayo all this thing do is listen for flashbot event from sse and block from rpc, execute all predefined condition check in parallel, and check for final tx in block then mark that condition as completed.

  gantt
  title Client Diagram
  dateFormat X
  axisFormat %s
  section Block Event
  Block 1           :milestone, 0,
  Block 2           :milestone, b2, 4,
  Add Tx1 To Processed :crit, after b2, 1s
  section Flashbot SSE Event
  Receieved Tx1     :tx1, 1, 1s
  Receieved Tx2     :tx2, 1, 1s
  Receieved Tx3     :tx3, 1, 1s
  Processing Tx1     :ptx1, after tx1, 1s
  Processing Tx2     :ptx2, after tx2, 1s
  Processing Tx3     :after tx3, 1s
  Sending Bundle With Tx1 :active, after ptx1, 1s
  Sending Bundle With Tx2 :after ptx2, 1s
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Note: Although it does condition check in parallel but it doesn't handle incremental nonce yet.

Instruction

Put your private key and rpc endpoint in .env, run the executatble with cargo run, and then gucci.

Tinkering With Stuff

All conditional check are defined in executor.rs with 3 endpoints, each as vector of executable condition and handler.

  • Event: Throws the entire event to handle, useful for handling full private tx, e.g. only tx hash was visible.
  • Tx: Only throws one tx element.
  • Log: Only throws one log element.