Manual Review

A thorough line-by-line review was conducted on the codebase to identify potential malfunctions and vulnerabilities in the scounting and players module of MetaSoccer.

As the project at hand implements an NFT lock-to-mint mechanism, intricate care was put into ensuring that the flow of funds & assets within the system conforms to the specifications and restrictions laid forth within the protocol's specification.

We validated that all state transitions of the system occur within sane criteria and that all rudimentary formulas within the system execute as expected. We pinpointed certain standard deviations within the system which could have had minor ramifications to its overall operation, however, they were conveyed ahead of time to the MetaSoccer team to be promptly remediated.

Additionally, the system was investigated for any other commonly present attack vectors such as re-entrancy attacks, mathematical truncations, logical flaws and ERC / EIP standard inconsistencies. The documentation of the project was satisfactory to a great extent.

A total of 13 findings were identified over the course of the manual review of which 2 findings concerned the behaviour and security of the system. The non-security related findings, such as optimizations, are included in the separate Code Style chapter.

The finding table below enumerates all these security / behavioural findings:

ID	Severity	Addressed	Title
MSP-01M			Inexistent Validation of Yielded ID
MSS-01M			Non-Standard Usage of ERC721 Functions