Stellar network successfully upgraded to Protocol 19 on June 8, 2022, introducing new transaction preconditions and signer types that enable payment channels, blockchain bridges, and key recovery solutions.
The Stellar public network completed its upgrade to Protocol 19 on June 8, 2022 at 15:00 UTC. The upgrade introduces new transaction preconditions and a new signer type, technical improvements designed to simplify building payment channels, bridges to other blockchains, and key recovery solutions. Developers must update Stellar Core, Horizon, and SDKs to remain compatible. The upgrade required validator consensus, demonstrating Stellar's decentralized governance model where any network participant can run a validator and vote on protocol changes.
