On Sat, Jun 3, 2023 at 2:43 PM Greg Sanders wrote: > No in this case the txid is identical. Only the wtxid is malleated, with > annex data stuffed to max transaction size. > This doesn't sound incentive compatible? While gathering context, I did find https://github.com/bitcoin/bitcoin/pull/24007. Apparently closed because of a lack of use case. But perhaps the desire to not limit the annex can revive that proposal? Joost >