Broken financial logic in `claimFees` function
Summary
Description: In MerkleAirdrop contract the fee for claiming an airdrop is only 1e9and it
is not economically profitable to call claimFees function for contarct owner.
Vulnerability Details
Proof of Concept:
As we know this contract is designed to airdrop 25 usdc to 4 lucky winners and the fee for claiming this reward is only 1e9 or 1 GWEI. So expected balance will be 4 GWEI but calling claimFees even with gas price 1 gwei we will spend 21000 gwei for transfering 4 GWEi to the contract owner. Sounds weird for me.
Impact
We have useless function claimFees that will never be called by contract owner.
Tools Used
Manual review.
Recommendations
I propose to remove fee for claiming the airdrop or make it higher.
Lead Judging Commences
Economically Impractical Fee
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