From: Tomas <tomas@tomasvdw•nl>
To: bitcoin-dev@lists•linuxfoundation.org
Subject: [bitcoin-dev] Fraud Proofs with semi SPV
Date: Fri, 05 May 2017 10:49:35 +0200 [thread overview]
Message-ID: <1493974175.1405717.966643128.63AF4749@webmail.messagingengine.com> (raw)
I would like some feedback on the idea to use a node type a bit heavier
then SPV (dubbed FSPV) to solve Fraud Proofs.
An FSPV node not only downloads block headers, but also the "spend-tree
blocks", consisting of all TXIDs and all previous output indices and
TXIDs. The latter can be compacted using a scheme similar to Compact
Blocks, which will make the spend-tree block ~80kb in size.
ThIs way the FSPV can track the full transaction graph at little cost.
The advantage is, that Fraud Hint messages for absent/withheld
transactions become feasible. A normal SPV is reduced to Full Node by
such (cheaply faked) hint, but for an FSPV the cost is almost zero.
All it needs to do is add a taint-bit in the tree and propagate the
taint to the transaction graph. It then knows it needs to request the
Fraud Hinted transaction to consider any descendant transaction valid.
This makes it sufficient to punish fraudulent fraud hints or withheld
transactions by normal "banscore" procedures.
All other fraud can be proven by transaction-sets.
More information here: https://bitcrust.org/blog-fraud-proofs
Tomas
Bitcrust
reply other threads:[~2017-05-05 8:49 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
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=1493974175.1405717.966643128.63AF4749@webmail.messagingengine.com \
--to=tomas@tomasvdw$(echo .)nl \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
/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