Function: registerNewEncryptionKey(bytes _key)

This is the key-manager entry point that records a freshly rotated encryption key so downstream deposits can reference the latest key.

Inputs

• _key

  • Control: Key manager (KEY_MANAGER_ROLE).

  • Constraints: Must be exactly 33 bytes (compressed EC public key) — otherwise, it reverts with ErrorInvalidEncryptionKeyLength.

  • Impact: Appended to encryptionKeys along with the current message queue index for later lookup.

Branches and code coverage

Intended branches

• Reverts when _key.length is not 33.

  Test coverage

• Successful registration caches the next queue index.

  Test coverage

Negative behavior

• A caller without KEY_MANAGER_ROLE reverts.

  Negative test

Function call analysis

• IL1MessageQueueV2(this.messageQueueV2).nextCrossDomainMessageIndex()

  • What is controllable? N/A.

  • If the return value is controllable, how is it used and how can it go wrong? N/A.

  • What happens if it reverts, reenters or does other unusual control flow? N/A.