The Stellar Network upgrade vote for Protocol 27 "Zipper" is scheduled for July 8, 2026. We are upgrading our Stellar Mainnet infrastructure ahead of this vote. This upgrade introduces authentication delegation for custom accounts and address-bound Soroban credentials. During the maintenance window, brief interruptions to RPC availability may occur.
RPC Changes:
Two new Soroban host functions are introduced: delegate_account_auth and get_delegated_signers_for_current_auth_check, enabling custom accounts to delegate authentication to other addresses
New credential type SOROBAN_CREDENTIALS_ADDRESS_WITH_DELEGATES allows delegated signers to be bundled into a single authorization entry, reducing transaction size
New credential type SOROBAN_CREDENTIALS_ADDRESS_V2 introduces address-bound signature payloads to prevent cross-account signature replay. The existing SOROBAN_CREDENTIALS_ADDRESS type remains valid until Protocol 28