Here's a quick update on where we're up to. Thanks to Matts excellent work, I was able to test his bitcoinj and bitcoin-qt work together today. There are a few minor tweaks needed, but I feel like we're maybe a week away from having all the code in a mergeable state. Here is the remaining work:
- There are a couple of bugfixes needed on the bitcoinj side: the fallback to downloading full blocks is problematic and needs to be deleted, there's an API change we want - Adjust the default FP rate requested by BCJ to be 0.0001, this is appropriate for the latest blocks in the chain and yields 0-5 false positives per block - Introduce a new part to the filter protocol that allows clients to control auto-expansion. This turned out to be very volatile, we saw jumps from 0-3 FPs per block to 500 in the space of 1 block, perhaps if a SatoshiDice transaction got into the filter. A simple yes/no flag can suffice for now, but a better solution would be for the client to submit templates for output scripts that would trigger auto-adding the matched outpoint - autoexpansion is only needed in the case where the input script doesn't contain any predictable data. For pay-to-address and P2SH it does, so expansion doesn't help. Matt said he'd hopefully try to look at this soon. With auto-expansion disabled, the FP rate adjusted and a bugfix on the bcj side I was able to sync a wallet using a bloom filtered chain. Although it's tight, I think this work should go into 0.8 - it'll be much more compelling to advertise it this way, we can say "Upgrade to 0.8 and help network performance for everyone". And in the case that we discover a showstopper problem, we just don't deploy the code that uses the new messages into clients. ------------------------------------------------------------------------------ Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS, MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft MVPs and experts. ON SALE this month only -- learn more at: http://p.sf.net/sfu/learnmore_122712 _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
