Contract Hash Verification

Verify that upgraded proxy contract implementations match expected bytecode hashes, preventing malicious upgrades and ensuring code integrity.

Behavior

• Listens for UPGRADED events from proxy contracts.

• Fetches implementation bytecode and computes hash.

• Compares against configured expected hashes.

• Supports initial checks and real-time monitoring.

Use cases

• Proxy Security: Ensure only authorized contract upgrades are deployed, preventing malicious code injection in upgradeable contracts.

• Multi-sig Governance: Verify that DAO-approved contract upgrades match the intended implementation before execution.

• Audit Trail: Maintain cryptographic proof of contract versions for compliance and security audits.

Detector Configuration

1. Name - Enter a descriptive name for your monitor, for example: "Contract Hash Verification".

2. Hash Type - Choose the hashing algorithm you want to use for verification:

   1. Keccak

   2. SHA256

3. Contract Bytecode Checksum - Enter the known, trusted hash value that the current bytecode should match.

4. Initial Check - Choose whether you want an immediate verification when the detector is created.

Alert example