A Rust-based Bitcoin mempool monitoring tool that tracks transactions, detects Replace-By-Fee (RBF) updates, and when transactions are mined. This tool connects directly to your Bitcoin node via ZMQ and RPC to provide real-time mempool analysis. The goal of this project is to collect data on unconfirmed transactions to help with various data driven research projects.

• Rust toolchain (1.70 or later)
• Running Bitcoin Core node with:
  • txindex=1
  • RPC enabled (authentication via user and password)
  • ZMQ enabled (zmqpubrawtx=tcp://127.0.0.1:28332)

Example regtest run:

cargo run -- --bitcoind-user foo --bitcoind-password bar --bitcoind-host "127.0.0.1" --bitcoind-rpc-port 18443 --bitcoind-zmq-port 28373

docker run --rm -it -v "$PWD":/volume -w /volume messense/rust-musl-cross:x86_64-musl cargo build --release --target x86_64-unknown-linux-musl

• add tests
• DB operations should be async
• Do not start if node is not synced
• Should not start if mempool is not loaded
• Replace sled with something that allows you to query via various indecies
• multi-threading
• add record CPFP
• Track prune
• prune large witnesses
• Capture mempool size and tx count at the time of entry and exit
• Some CI checks: Lint, clippy, future tests
• Do not panic if rpc fails