1. Use Fixed Compiler Version

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Description:

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Using ^0.8.20 allows any compiler version from 0.8.20 to <0.9.0, which can lead to future incompatibility or unintentional behavior changes as newer versions may introduce different features or bugs.

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Impact:

Low – Ensures deterministic behavior across builds.

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Fix:

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2. Gas Optimization – Use += Instead of = +

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Instance:

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pot = pot + amountToPot;

playerClaimCount[msg.sender] = playerClaimCount[msg.sender] + 1;

totalClaims = totalClaims + 1;

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Description:

Using += is more gas-efficient than = + due to slight opcode optimization.

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Impact:

Informational – Minimal gas savings, but improves style and consistency.

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Fix:

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pot += amountToPot;

playerClaimCount[msg.sender] += 1;

totalClaims += 1;

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3. No Withdrawal Mechanism for Ether Sent to Contract

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Instance:

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receive() external payable {}

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Description:

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The contract has a receive() function but no way for the owner or any party to withdraw accidentally sent Ether. This will lock all ETH sent to the contract forever.

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Impact:

Low – Accidental ETH sent will be irretrievable.

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Fix:

Prevent Accidental Transfers

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receive() external payable {

revert("Nope);

}

4. Missing Zero Check in updatePlatformFeePercentage

Function:

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external onlyOwner isValidPercentage(_newPlatformFeePercentage)

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Description:

There is no explicit check ensuring _newPlatformFeePercentage is greater than zero.

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Impact:

Low – Setting fee to 0 may break the intended fee logic.

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Fix:

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require(_newPlatformFeePercentage > 0, "Fee percentage must be > 0");

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5. Missing Zero Check in updateClaimFeeParameters

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Function:

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Description:

While _newInitialClaimFee is checked to be > 0, _newFeeIncreasePercentage only relies on the modifier isValidPercentage, which may not guarantee it's non-zero.

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Impact:

Low – Fee increase percentage of zero may halt incremental fee logic.

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Fix:

Add:

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require(_newFeeIncreasePercentage > 0, "Fee increase percentage must be > 0");

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