This project involves the analysis of two proxy smart contracts, AdminUpgradeabilityProxy and FiatTokenProxy, which are part of an upgradeable proxy architecture for Ethereum-based applications. The primary aim is to allow the proxy contract to delegate calls to different implementation contracts, ensuring flexibility for upgrades without losing data or state between versions.

• AdminUpgradeabilityProxy is a contract that allows an administrator to control the upgradeability of the proxy contract. It includes checks to ensure that only the designated admin can upgrade the contract.
• FiatTokenProxy extends the AdminUpgradeabilityProxy and represents a token contract that uses an upgradeable proxy pattern. It may also include specific functionality for managing the token’s state or interactions with other systems.

Short Key Features:

• Upgradeable Proxy Architecture: The proxy pattern ensures that the logic of the contract can be upgraded without losing stored data, giving developers flexibility in managing updates.
• Admin-Controlled Upgrades: Only the admin account can trigger an upgrade of the proxy’s implementation contract, allowing for controlled and secure changes to contract logic.
• Fallback Prevention for Admin: The use of require(msg.sender != _admin()) ensures that the admin cannot accidentally trigger fallback functions, thus preventing certain administrative actions during contract execution.

Inheritance and Extensibility: The contracts leverage inheritance, with FiatTokenProxy inheriting from AdminUpgradeabilityProxy, ensuring that it inherits upgradeability and admin control functionalities.

Website: https://sky.money