The $1,800 Hostile Takeover: How Governance Attacks Are the Cheapest Exploit in DeFi - And 7 Defense Patterns That Actually Work

Based on the detailed patterns and strategies outlined for securing governance systems against various types of attacks, here's a comprehensive implementation checklist to ensure your governance system is robust:

1. Snapshot Voting Mechanism

• Ensure that voting power snapshots are taken at proposal creation time.
• Use getPastVotes or equivalent functions to retrieve historical token balances.

2. Veto Mechanism (Break Glass Guardian)

• Implement a Break Glass Guardian contract with veto functionality.
• Define a threshold for the guardian group, typically 2-of-3 or 3-of-5.
• Ensure guardians cannot propose or execute proposals themselves.
• Rotate guardians through normal governance processes to prevent capture.

3. Proposal Validation Hooks

• Create a mapping of critical function selectors that require super-majority approval.
• Implement _quorumReached logic to enforce higher quorums for these functions.
• Use _containsCriticalAction to check proposal calldatas against the critical selector map.

4. Adaptive Quorum with Participation Weighting

• Define a base quorum percentage (e.g., 10%) and maximum quorum percentage (e.g.,

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