On Tue, Jul 8, 2014 at 10:04 PM, Matt Whitlock wrote: > Is anyone working on a similar specification document for Satoshi's P2P > protocol? I know how blocks and transactions are structured and verified, > but I'm interested in knowing how they're communicated over the network. There's a high level guide here: https://bitcoin.org/en/developer-guide#p2p-network It's not a protocol specification however, more a lay-of-the-land type description. The protocol is not very complicated however. The wiki page describes it adequately. It's basically just a framing mechanism with excessively aggressive checksumming, a version handshake, an inventory mechanism to cut down on bandwidth usage, the alerts, and that's about it.