fhe-delegation

What problem does it solve?

Zama-native ACL delegation enables a wallet to grant, revoke, and read encrypted FHE handles (such as cUSDC balances) by another address, with strict directional rules and propagation considerations to prevent unauthorized access or wasted transactions.

Core Features & Use Cases

• Grant-view, revoke-view, and view-as commands to manage decryption access for FHE handles.
• Support for overriding the contract address (e.g., X402PaymentVerifier) to enable facilitator audits.
• Preflight checks (isDelegated and getDelegationExpiry) to avoid unnecessary gas if delegation doesn't exist or is expired; propagation window of 1–2 minutes after grant-view before decrypt requests succeed.
• Clear guidance on on-chain vs gateway propagation and error mapping for user remediation.

Quick Start

Run grant-view to grant access to a delegate and wait 1-2 minutes before the delegate runs view-as to decrypt the balance.