oz-erc7984-compliance-patterns
FHE Compliance Patterns
Use this skill when building or reviewing compliance features on confidential tokens. Pure privacy is a non-starter for institutional adoption. Institutions need auditability. These patterns make privacy and compliance coexist through layered, opt-in transparency.
When To Use
- Adding auditor or regulator read access to confidential balances
- Implementing freeze/unfreeze on encrypted amounts
- Adding blocklist or allowlist transfer controls to a confidential token
- Building tokenized securities or regulated financial instruments on FHEVM
- Reviewing whether a compliance design preserves privacy while meeting regulatory requirements
- Evaluating force-transfer or pause capabilities for corporate actions
Core Mental Model
Confidential tokens are private to the world but selectively transparent to authorized parties. Compliance is not the opposite of privacy — it is controlled disclosure.
More from z-korp/fhevm-cookbook
fhevm-router
Routes Zama FHEVM tasks to the right official docs path and next step
11fhevm-testing
Use when writing, structuring, or debugging tests for FHEVM contracts. Covers mocked mode vs real protocol, Hardhat decrypt helpers, input encryption in tests, and the false-confidence gap between local and testnet behavior.
11fhevm-acl-lifecycle
Use when granting, auditing, or debugging ACL permissions on encrypted handles in FHEVM. Covers FHE.allow, FHE.allowThis, FHE.allowTransient, and the critical rule that new handles do not inherit prior persistent ACL grants.
11fhevm-control-flow
Use when replacing if/else, require, or any conditional logic that depends on encrypted values in FHEVM. Covers FHE.select as the inline branching primitive, fallback semantics on encrypted conditions, and async public decryption when logic must branch back to plaintext state.
11oz-utils-safemath
Use when you need overflow-safe encrypted arithmetic on euint64 values. Covers the OpenZeppelin FHESafeMath library (tryIncrease, tryDecrease, tryAdd, trySub), uninitialized-handle semantics, and when to prefer it over raw FHE.add / FHE.sub.
11fhevm-public-decryption
Use when implementing two-step public decryption for state-changing operations in FHEVM. Covers makePubliclyDecryptable, off-chain proof retrieval, onchain verification with checkSignatures, and the critical single-step unwrap bug.
11