We’re introducing breaking changes as part of a security upgrade to the deployed Confidential Wrapper contracts. These changes are needed to align the system with updated FHEVM security recommendations to maintain the protocol’s 128-bit security guarantees.
When:
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Testnet: Monday, May 4, 2026 - 2:00 PM UTC (16:00 PM CET)
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Mainnet: Tuesday, May 11, 2026 - 2:00 PM UTC (16:00 PM CET)
Action required:
If you use the Zama SDK: Upgrade to the latest SDK version — install from the alpha channel ahead of the testnet upgrade, and from the latest (stable) channel ahead of the mainnet upgrade.
If you interact with the contracts directly, update your ABIs and integration code ahead of the upgrade dates. Refer to the changelog, as well as the updated documentation and the implementation on Github.