From: ZmnSCPxj <ZmnSCPxj@protonmail.com>
To: Pieter Wuille <pieter.wuille@gmail.com>
Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Rolling UTXO set hashes
Date: Mon, 15 May 2017 19:04:01 -0400 [thread overview]
Message-ID: <CT3GNfkLsQJyM0EmWXc3HBmnW1h2iptP0SohZnXZfZPffoVmcofD8fs_E3kV5PuFL0pQSQwwk_FyR-8-wdANf15NE8UElNWqcEcc5Ql3n8M=@protonmail.com> (raw)
In-Reply-To: <CAPg+sBgruEiXya6oFy6VpmR1KPDebjeGDtZZU+facZx5=L_a5w@mail.gmail.com>
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Good morning Pieter,
>4. Use cases
>
>* Replacement for Bitcoin Core's gettxoutsetinfo RPC's hash
>computation. This currently requires minutes of I/O and CPU, as it
>serializes and hashes the entire UTXO set. A rolling set hash would
>make this instant, making the whole RPC much more usable for sanity
>checking.
>* Assisting in implementation of fast sync methods with known good
>blocks/UTXO sets.
>* Database consistency checking: by remembering the UTXO set hash of
>the past few blocks (computed on the fly), a consistency check can be
>done that recomputes it based on the database.
Another use case I can think of is a potential "chain-flip" hard fork of block header formats, where the UTXO hash rather than merkle tree root of transactions is in the header, which would let lite nodes download a UTXO set from any full node and verify it by verifying only block headers starting from genesis.
Regards,
ZmnSCPxj
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next prev parent reply other threads:[~2017-05-15 23:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-15 20:01 [bitcoin-dev] Rolling UTXO set hashes Pieter Wuille
2017-05-15 20:53 ` Peter R
2017-05-15 23:04 ` ZmnSCPxj [this message]
2017-05-15 23:59 ` Gregory Maxwell
2017-05-16 0:15 ` ZmnSCPxj
2017-05-16 11:01 ` Peter Todd
2017-05-16 18:17 ` Pieter Wuille
2017-05-16 18:20 ` Gregory Maxwell
2017-05-23 4:47 ` Rusty Russell
2017-05-23 20:43 ` Pieter Wuille
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