[Bitcoin-development] Chain pruning

Mark Friedenbach mark at monetize.io
Thu Apr 10 22:15:15 UTC 2014

Checkpoints will go away, eventually.

On 04/10/2014 02:34 PM, Jesus Cea wrote:
> On 10/04/14 18:59, Pieter Wuille wrote:
>> It's important to
>> note that this is a strict reduction in security: we're now trusting
>> that the longest chain (with most proof of work) commits to a valid
>> UTXO set (at some point in the past).
> AFAIK, current bitcoin code code already set blockchain checkpoints from
> time to time. It is a garanteed that a longer chain starting before the
> checkpoint is not going to be accepted suddently. See
> <https://bitcointalk.org/index.php?topic=194078.0>.
> Could be perfectly valid to store only unspend wallets before last
> checkpoint, if during the blockchain download the node did all the checks.
> Would be interesting, of course, to be able to verify "unspend wallet
> accounting" having only that checkpoint data (the merkle tree can do
> that, I guess). So you could detect a data corruption or manipulation in
> your local harddisk.
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