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Subject: Re: [bitcoindev] Unbreaking testnet4
From: Sjors Provoost <sjors@sprovoost.nl>
In-Reply-To: <CACgYNOL3gH6zhmNyiKLenqoiM9mydsxs3XExxJX1ZSVvOmX2bA@mail.gmail.com>
Date: Mon, 28 Apr 2025 20:50:35 +0200
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To: Saint Wenhao <saintwenhao@gmail.com>
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> Op 28 apr 2025, om 20:15 heeft Saint Wenhao <saintwenhao@gmail.com> het v=
olgende geschreven:
>=20
> > Which means that in practice, instead of seeing huge or overflowed amou=
nts in UTXOs, we will probably see a lot of repeated entries in the UTXO se=
t, holding MAX_MONEY each.
>=20
> Now I applied "doubling" patch in my local regtest, and I can confirm it.=
After 2849 blocks, when trying to mine block number 2850, the UTXO amount =
exceeded 21 million coins, and then it failed.
Thanks, that's useful feedback.
Note that in regtest the nSubsidyHalvingInterval is 150 blocks instead of 2=
10,000 for mainnet and the current testnets, so the problem happens 1,400 t=
imes faster. On an actual testnet5 this would happen at block 3,999,000 ins=
tead, which is 75 years from now.
[...]
> However, after manually crafting a block with 21 million coins, it succee=
ded:
In the unlikely event this hypothetical testnet would still be around, we c=
ould modify the miner code to not go over this limit.
- Sjors=20
--=20
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