Actively fighting a compromised Telegram right now, please don't trust any messages from me without security question first. I have access but I can't remove attacker from my active sessions.

Contender is a tool for sending lots of Ethereum transactions — but did you know you can plug in custom logic too? We used it to build a cross-chain tester that sends messages between two chains. Here’s how it works: Normally, when you send a tx with Contender, that’s it. But we wrote a custom callback — a bit of code that runs after each tx is sent — to check if the tx triggered a cross-chain message. If it did, our callback sends a second tx to another chain to relay the message. This mimics how OP-Interop works under the hood, but without relying on an auto-relayer. To do this, our callback: - waits for the first tx to land - looks for a special log in the receipt - sends a follow-up tx with the message to the second chain Contender makes this possible by letting you run async Rust code in the background after each tx. This is what it looks like (rust pseudocode): The OP-Interop spammer lives here: 🔗 But this is just one use case. Callbacks let you do whatever you want after a tx (or batch of txs) is sent — your imagination is the limit! For a deeper dive on the code behind this project, check out my forum post: And be sure to check out the contender repo -- we're adding more features all the time!

Work on P2P protocols and will be at SBC? Hmu, cooking up a fun gathering 🧑‍🍳🌍📡

my favorite part of this is that you can see not just the subslot ordering, but also the shift in the full block. here for example, the transaction at index 122 here would have been ToB and skewed everyone else's execution.

Viem 2.33 introduces initial support for Flashblocks as a first-class citizen! Try it out in Viem or Wagmi by importing a chain that supports preconfirmations – starting with `basePreconf` + `baseSepoliaPreconf`. Then observe sub-200ms transaction confirmation times. 🫡

As most of CT knows, Flashblocks launched on Base Mainnet 3 days ago. I wanted to share 2 quick learnings after helping build out this feature as one of the engineers:

have you made a swap on Flaunch today? see lightning fast transactions on Flaunch, powered by Flashblocks on 🟦

🚀 Contender v0.3.0 is out! Here’s what’s new in our Ethereum stress-testing toolkit:🧵

Introducing . An LLM designed to protect your privacy—end-to-end encrypted, Ethereum verifiable, and easy-to-use UX. With TEE & DStack, Panda ends your privacy concerns for asking personal & sensitive questions to AI using TEE🙂 (1/n)

everyone is forming an opinion about glamsterdam EIP’s, but almost no one understands the technical implications of each proposal here is a direct comparison of the headliner EIP’s along the dimensions that matter: