On Sat, May 24, 2014 at 5:04 PM, Alan Reiner <etothe...@gmail.com> wrote: > I think the most important change is modifying the way Bitcoin Core > prioritizes blocks. Right now it uses the first full block verified. > Instead, it should consider the first valid header received as highest > priority, but only mine on it once it has done full verification of the
This directly opens an attack where as soon as you find a block you announce the header to the world and then you delay announcing the block content. You can continue to mine on the block but no one else can (or alternatively they break their rule and risk extending an invalid block— bad news for SPV wallets)— then when you find a successor block or someone else finds a competing block you immediately announce the content. It basically means that you can always delay announcing a block and be sure that doing so doesn't deprive you of your winning position. > If miners are concerned about that 1-3 second gap, they > should perhaps focus on making sure the tx they are mining are > well-propagated already, so that most of the network has most of the > transactions already in their memory pool by the time their block is mined. With an alternative transport protocol, assuming the content has already been relayed a block could be sent in a couple back to back UDP packets. (e.g. a few bytes per transaction to disambiguate the transaction order out of the already sent transactions). So I think very similar latency could be achieved without doing any thing which might increase the motivations for miners to misbehave. ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
