Submission Details
Severity:
using on-chain data to generate the random number is Risky
The contract uses block.timestamp and block.difficulty for randomness which can be manipulated by miners to some extent. This could potentially affect the fairness of the raffle.
Recommendations
use Chainlink VRFConsumer for secure randomness
Updates
Lead Judging Commences
Hamiltonite about 2 years ago
Submission Judgement Published Assigned finding tags:
weak-randomness
Root cause: bad RNG Impact: manipulate winner
Rewards breakdown
nSLOC
143This contest has a flat reward structure with the following payouts:
100 EXP
20 EXP
2 EXP
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