Submission Details
Severity:
Using older version of solidity, can have potential bug like overflow or underflow
Summary
PuppyRaffle contract is using older solidity version that can potential bugs like overflow and underflow.
Vulnerability Details
Impact
Loss of fee because fee is typecasted from uint256 to uint64 and version 0.7.6 doesn't provide protection against overflow and underflow.
Tools Used
Manual Review
Recommendations
Use latest version of solidity or atleast version grater than 0.8.0
Rewards breakdown
nSLOC
143This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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