@0xbitcoiner posted about this yesterday, but I wanted to bring it up again to make sure people knew how to participate

One of the things that BIP 54 (#1464329) proposes fixing is that there are some types of Bitcoin transactions that could take your node a very long time to validate.

A group of developers is going to run a demonstration of what such an attack might look like and you can not only watch, but you can also connect a node to their signet and see for yourself how long it takes your own node to validation such transactions.

Signet is a Bitcoin testing network where blocks need a special signature from the network owners in addition to proof of work. This allows signet blocks to be found at highly reliable intervals while still testing other dynamics of an open network.

Any Bitcoin Core node can launch in signet with the command

bitcoind -signet

Antoine Ponsoit has these suggestions for participating in the demo:

How to join the demo liveHow to join the demo live

All you need to join the demo is run a Bitcoin Core node on Signet. You would be able to observe how long it took your own node to validate each block, and compare arrival time with other participants. Feel free to share your results in this thread!

Your Signet node needs to be fully-synced. The historical block chain is still pretty small, you would need about 30GiB of disk space. If necessary, you can also run in -prune mode. It will not affect your ability to participate in the demo.

If you are not able to run a Signet node yourself, you should still be able to observe the blocks as they arrive on mempool.space and the fork dynamics at the temporary peer.observer instance for Signet.

When will the demo take place?When will the demo take place?

We are going to do three runs of the demo so everyone has a chance to join live:

1.  April 8, 2026 9:00 AM UTC-5
2.  April 8, 2026 5:00 PM UTC-5
3.  April 9, 2026 4:00 AM UTC-5

This is cool and I'm hoping to participate.