Yardstick, Protocol 26 Upgrade (Mainnet Vote May 6, 2026)
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Justin Rice
Apr 1, 2026, 1:48:44 PMApr 1
to Stellar Validators
Hello validators!
Today, we announced the timeline for Stellar Yardstick, Protocol 26. This upgrade introduces new protocol-level configuration settings, checked 256-bit integer arithmetic, v2 TTL host functions, additional BN254 cryptographic host functions, SAC improvements, and strkey conversion host functions. Stay tuned — we'll be sharing an announcement soon with a full breakdown of the changes.
Key dates:
https://stellar.org/blog/foundation-news/stellar-yardstick-protocol-26-upgrade-guide.
Today, we announced the timeline for Stellar Yardstick, Protocol 26. This upgrade introduces new protocol-level configuration settings, checked 256-bit integer arithmetic, v2 TTL host functions, additional BN254 cryptographic host functions, SAC improvements, and strkey conversion host functions. Stay tuned — we'll be sharing an announcement soon with a full breakdown of the changes.
Key dates:
- As of today, many stable releases, including Stellar Core and RPC are available
- By April 8, 2026: Stable releases for all Stellar-related software will be available
- April 16, 2026 at 1700 UTC: Testnet upgrade
- May 6, 2026 at 1700 UTC: Mainnet upgrade vote
https://stellar.org/blog/foundation-news/stellar-yardstick-protocol-26-upgrade-guide.
We'll be in touch as releases come out and we near the upgrade vote. Until then, let me know if you have any questions!
Justin Rice
Apr 30, 2026, 10:18:50 AMApr 30
to Stellar Validators
Reminder: the Yardstick, Protocol 26 upgrade vote is scheduled for next week, May 6 at 1700 UTC.
The Upgrade Guide has been updated with summaries of the changes:
The Upgrade Guide has been updated with summaries of the changes:
https://stellar.org/blog/foundation-news/stellar-yardstick-protocol-26-upgrade-guide
Take a look and let me know if you have any questions. If the changes look good, you can arm your validators to vote for the upgrade with the following command:
upgrades?mode=set&upgradetime=2026-05-06T17:00:00Z&protocolversion=26
No matter what, please make sure to install up-to-date versions of all Stellar software before next week to avoid disruption!
Take a look and let me know if you have any questions. If the changes look good, you can arm your validators to vote for the upgrade with the following command:
upgrades?mode=set&upgradetime=2026-05-06T17:00:00Z&protocolversion=26
No matter what, please make sure to install up-to-date versions of all Stellar software before next week to avoid disruption!
Justin Rice
May 5, 2026, 3:58:51 PMMay 5
to Stellar Validators
Final reminder: the network upgrade vote for Yardstick, Protocol 26 is tomorrow at 1700 UTC. Make sure you have upgraded your Stellar infrastructure, and armed your validators for the vote.
For more info, see the Upgrade Guide: https://stellar.org/blog/foundation-news/stellar-yardstick-protocol-26-upgrade-guide
For more info, see the Upgrade Guide: https://stellar.org/blog/foundation-news/stellar-yardstick-protocol-26-upgrade-guide
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