The condition if (block.timestamp <= START_TIME + matchNumber * 68400 - 68400) in the setPrediction function of the ScoreBoard contract does not correctly enforce the prediction deadline. Since 68400 - 68400 equals 0, the expression simplifies to

This condition allows predictions until the exact start time of the tournament instead of closing one hour before the matc

Impact:

Players can make predictions until the match start time, violating the intended rule that predictions must close one hour before the match begins.

Tools Used

Manual review

Recommendations

properly set the timestamp