Storage Proofs

Description

In several parts of the contracts, require statements lack detailed error messages. For example, in V2’s _extractPeriodFromProof:

has no descriptive message.

Workflow Explanation

1. Proof Processing:
   The verifier processes the state proof and calls Verifier.extractSlotValueFromProof.

2. Slot Existence Check:
   If the expected slot does not exist, the require statement reverts without a helpful error message.

Attack Path

• Misconfiguration or Malicious Input:
  If a state proof is missing the expected storage slot (either due to an error or a malicious attempt), the contract will revert with a generic error.

• Impact:
  This does not directly allow an attacker to profit, but it hinders debugging, monitoring, and operational response. In a live system, ambiguous errors can delay the detection and mitigation of more severe issues.

Proof of Concept Outline

• Test Case:
  Submit a proof that deliberately omits the period slot.

• Observation:
  The transaction reverts with a generic error, making it harder to diagnose the root cause without additional logging.

Mitigation Recommendation

• Update require statements to include detailed error messages, e.g.:

  require(slot.exists, "Period slot not found in state proof");

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