More of a shower-thought, but I am currently working on a bitcoin wallet that
is designed to handle "free pressure" properly (e.g. CPFP aware, transaction
merging, automated progressive fee bumping, etc) and one kind of annoying thing
is that there really is no fee market on testnet.
I was thinking it would be cool if tesnet blocks were a bit smaller, so they
didn't just mine the entire mempool each block. A full-blown softfork on
testnet seems overkill, but just changing the default mining maxBlockWeight to
something like 50% of the current mempool weight would help test things and
help wallet developers fixing things like "stuck transactions" and what not.
(And of course some miners will not use the default, but it's not really a big
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