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Summary
The most critical subjects covered in our audit are access control, completeness of removed functionality and suitability for the described migration process. The general subjects covered are upgradeability and documentation. Security regarding all the aforementioned subjects is high.
In summary, we find that the changes introduced provide a high level of security. However, note that the security heavily relies on the non-audited code, too.
It is important to note that security audits are time-boxed and cannot uncover all vulnerabilities. They complement but don't replace other vital measures to secure a project.
About Sky Wormhole NTT Migration Update
Sky implements an upgrade for the USDS Wormhole bridge for Ethereum and Solana. The upgrade disables the initiation of transfers to allow for an eventual migration of the token bridge to the new LayerZero infrastructure.