UUPS Proxy Pattern Implementation

The Universal Upgradeable Proxy Standard (UUPS) is a popular design pattern for creating upgradeable smart contracts. It allows you to change a contract's logic without changing its address on the blockchain.

This is crucial for fixing bugs, adding new features, or adapting to changing requirements without losing user data or contract state.

UUPS uses a proxy contract that holds the contract's state (data) and a separate implementation contract that holds the contract's logic (functions).

• Proxy Contract: A simple, unchanging contract that forwards calls to the current implementation.
• Implementation Contract: Contains the actual business logic. This is the contract that gets upgraded.

The key difference in UUPS is that the upgrade logic resides within the implementation contract, not the proxy.