Yardstick, Protocol 16 Upgrade (Testnet April 16, Mainnet May 6)
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Justin
Apr 1, 2026, 1:49:53 PM (4 days ago) Apr 1
to Stellar Developers
Hello developers!
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!
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