From: Thomas Voegtlin <thomasv1@gmx•de>
To: bitcoin-development@lists•sourceforge.net
Subject: Re: [Bitcoin-development] Bitcoind-in-background mode for SPV wallets
Date: Wed, 09 Apr 2014 18:09:06 +0200 [thread overview]
Message-ID: <534570A2.9090502@gmx.de> (raw)
In-Reply-To: <CAAS2fgScWkentFy7Ak0bpYVLsOFL+xkwPm5QRu9ENeX9oCtPug@mail.gmail.com>
Le 09/04/2014 17:54, Gregory Maxwell a écrit :
> Sadly today Electrum requires more than a full node, it requires a
> number of large additional indexes over what a full node has and
> pruning is precluded. I don't think that increasing the resource
> utilization of the node is a good way to go there for the purposes
> expressed here. (not that electrum couldn't be used here, but not
> unmodified without the resource usage increasing route)
>
Electrum uses two large indexes:
address -> utxo
(patricia tree, aka "ultimate blockchain compression", see thread
started by Alan Reiner in the bitcointalk forum)
address -> spent history
The first index is not going to grow larger than what bitcoind already
needs to store, because bitcoind will always need to store utxos.
The second index threatens to become large. However, Electrum servers do
not keep the full histories, they prune older entries. Without adapting
Electrum clients, it would even be possible to keep only one bit per
address (to know whether that address has been used or not), and that
information is only used to restore wallets from seed, not during normal
operations.
If the first index (patricia tree) was implemented in bitcoind, that
would obviously be a big relief for electrum servers.
>> and that it might be an easier way to support
>> SPV clients than creating a new API in bitcoind for it since Stratum
>> itself already relies on bitcoind to provide it's services.
>
> Bitcoin's own P2P protocol is already the API for a ordinary SPV
> client. So I don't believe any new API would be require, except
> perhaps for some process management stuff (which also isn't provided
> for Electrum).
>
> ------------------------------------------------------------------------------
> Put Bad Developers to Shame
> Dominate Development with Jenkins Continuous Integration
> Continuously Automate Build, Test & Deployment
> Start a new project now. Try Jenkins in the cloud.
> http://p.sf.net/sfu/13600_Cloudbees
> _______________________________________________
> Bitcoin-development mailing list
> Bitcoin-development@lists•sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/bitcoin-development
>
>
next prev parent reply other threads:[~2014-04-09 16:09 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-09 15:29 Wladimir
2014-04-09 15:37 ` Tamas Blummer
2014-04-09 15:41 ` Natanael
2014-04-09 15:54 ` Gregory Maxwell
2014-04-09 16:09 ` Thomas Voegtlin [this message]
2014-04-09 19:25 ` Wladimir
2014-04-10 6:04 ` Tamas Blummer
2014-04-10 11:09 ` Wladimir
2014-04-10 11:29 ` Mike Hearn
2014-04-10 11:32 ` Pieter Wuille
2014-04-10 11:43 ` Peter Todd
2014-04-10 11:50 ` Gregory Maxwell
2014-04-10 11:54 ` Peter Todd
2014-04-10 17:30 ` Tier Nolan
2014-04-11 16:54 ` Gregory Maxwell
2014-05-04 21:11 ` Tier Nolan
2014-04-09 17:31 ` Wladimir
2014-04-09 15:42 ` Brian Hoffman
2014-04-09 15:57 ` Gregory Maxwell
2014-04-09 16:09 ` Tamas Blummer
2014-04-09 15:47 ` Mark Friedenbach
2014-04-09 16:27 ` Tamas Blummer
2014-04-09 17:46 ` Peter Todd
2014-04-09 17:50 ` Tamas Blummer
2014-04-09 18:00 ` Mike Hearn
2014-04-09 18:19 ` Wladimir
2014-04-09 18:35 ` Justus Ranvier
2014-04-09 18:46 ` Wladimir
2014-04-09 18:50 ` Gregory Maxwell
2014-04-09 18:58 ` Justus Ranvier
2014-04-09 19:33 ` Gregory Maxwell
2014-04-09 20:12 ` slush
2014-04-09 20:31 ` slush
2014-04-09 20:36 ` Mark Friedenbach
2014-04-09 21:04 ` Gregory Maxwell
2014-04-09 20:37 ` Wladimir
2014-04-09 20:35 ` Wladimir
2014-04-09 20:50 ` slush
2014-04-09 20:55 ` Laszlo Hanyecz
2014-04-10 6:38 ` Mike Hearn
2014-04-10 6:50 ` Wladimir
2014-04-10 7:09 ` Mike Hearn
2014-04-10 9:33 ` Peter Todd
2014-04-10 7:10 ` Tamas Blummer
2014-04-10 9:17 ` Mike Hearn
2014-04-10 9:39 ` Tamas Blummer
2014-04-10 10:40 ` Mike Hearn
2014-04-10 10:44 ` Tamas Blummer
2014-04-10 11:36 ` Peter Todd
2014-04-10 11:45 ` Mike Hearn
2014-04-10 11:52 ` Peter Todd
2014-04-10 9:47 ` Peter Todd
2014-04-09 18:04 ` Peter Todd
[not found] ` <CA+s+GJBpvqqu=XEojyekx5su+JfYLwz+zsbo8L0=5t6s-_b33w@mail.gmail.com>
2014-04-09 17:35 ` [Bitcoin-development] Fwd: " Wladimir
2014-04-09 16:03 ` [Bitcoin-development] " Peter Todd
2014-04-09 17:33 ` Alex Mizrahi
2014-04-09 17:38 ` Wladimir
2014-04-09 17:38 ` Peter Todd
2014-04-09 18:35 ` Kevin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=534570A2.9090502@gmx.de \
--to=thomasv1@gmx$(echo .)de \
--cc=bitcoin-development@lists$(echo .)sourceforge.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox