Another Test Campaign To be successful

The abstract Proxy contract implements the core delegation functionality. If the concrete proxies that we provide below are not suitable, we encourage building on top of this base contract since it contains an assembly block that may be hard to get right. Upgradeability is implemented in the UpgradeableProxy contract, although it provides only an internal upgrade interface. For an upgrade interface exposed externally to an admin, we provide TransparentUpgradeableProxy. Both of these contracts use the storage slots specified in EIP1967 to avoid clashes with the storage of the implementation contract behind the proxy.