Bitcoin Optech Newsletter #426

This Bitcoin Optech Newsletter #426 highlights key developments, including a draft BIP for dynamic one-byte message type IDs in the version 2 P2P transport, a discussion on conventions for tagged hash tags in BIPs, and a proposed metaprotocol for private onchain transfers that requires no consensus changes. Anthony Towns's draft BIP for dynamic message IDs allows peers to choose their own one-byte identifiers, streamlining the deployment of new P2P messages without global coordination and offering significant space savings. A discussion, initiated by Fabian Jahr, debated whether BIPs should include their number in tagged hash tags, weighing uniqueness against implementation friction. Additionally, the newsletter describes a proposal by Misha Komarov for private onchain Bitcoin transfers that do not necessitate any consensus layer changes.