Subject: [bitcoin-dev] Using service bit 24 for utreexo signaling in testnet and signet

From: kcalvinalvin <[email-masked]>
Date: Thu, 02 Mar 2023 06:55:19 +0000

Hello all,

Wanted to tell the mailing list that I'll be using service bit 24 (1 << 24) to signal that nodes are Utreexo capable nodes on testnet and signet as requested by the comment in protocol.h in bitcoind (https://github.com/bitcoin/bitcoin/blob/74981aa02d2b14ad1c0b82d1eb09cf3169eaa8ae/src/protocol.h#L295-L301). There are plans to release binaries for the utreexo node (github.com/utreexo/utreexod) in the next few months so that power users can try it out. I have no plans to release binaries for mainnet yet.

Do let me know if someone else is using the same bit to signal for something else and we can coordinate accordingly.

Best,
Calvin