Base Mainnet Flashblock Feed Now Live
Observing and Verifying
The day after my writeup of Flashblocks on Base dropped, a reader pinged me on Discord with good news — the Base mainnet flashblock feed that we discovered on GitHub (wss://mainnet.flashblocks.base.org/ws) was open to the public.
Nice timing!
Fortunately, the websocket/brotli example script I shared works without modification to observe the mainnet feed.
Just swap the endpoint URI and hit the ground running.
Flashblock Watcher
Extending the previous example, let’s connect to a Base node and use it to verify the flashblocks feed to the final block received from the sequencer.