Protocol 22 is now live on Stellar Mainnet. This guide provides developers and businesses with upgrade instructions, key dates, release links for all Stellar infrastructure and SDKs, and important changes including the Soroban RPC rebrand to Stellar RPC and upcoming Horizon transaction meta defaults changes.
Protocol 22 has successfully upgraded on Stellar Mainnet as of December 5, 2024, following testnet deployment on November 12 and stable builds on November 19. Developers and operators must update their Stellar SDKs, infrastructure components (Stellar Core, Horizon, RPC), and validator nodes to the latest versions. Key changes include the official rebrand of Soroban RPC to Stellar RPC, reflecting its role as a fundamental building block for all of Stellar rather than just Soroban. Additionally, SDF's hosted Horizon API will stop returning Transaction Meta by default on December 18, with developers directed to use RPC or Stellar Core instead. The guide provides comprehensive links to all relevant releases across infrastructure components and SDKs in multiple languages, along with specific configuration instructions for validators and infrastructure operators.
