Protocol 23 upgrade guide for Stellar developers and businesses, covering key dates, preparation steps, breaking changes, and release information for infrastructure, SDKs, and validators.
This comprehensive Protocol 23 preparation guide outlines critical dates including the completed July 17 Testnet upgrade, August 14 Testnet reset and stable releases, and September 3 Mainnet upgrade vote. Developers must upgrade Stellar SDKs, infrastructure components (Stellar Core, Horizon, RPC), and validators before the upgrade. Major breaking changes include XDR modifications introducing TransactionMetaV4, unified event streams between Classic and Soroban, RPC endpoint removals, Horizon database migration requirements, and SDK updates. The guide provides links to all relevant releases across multiple programming languages and infrastructure components, with specific instructions for different user types.
