Eggstravaganza

First Flight #37
Beginner FriendlySolidity
100 EXP
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Submission Details
Severity: medium
Invalid

Gas Efficiency Concerns in getTimeRemaining()

File
EggHuntGame.sol
Code Snippet
function getTimeRemaining() external view returns (uint256) {
return block.timestamp >= endTime ? 0 : endTime - block.timestamp;
}
Technical Analysis
  • Current gas usage: 210 gas (verified through Foundry testing)

  • Function type: view (no state modifications)

  • Operations performed:

    • Single comparison operation

    • Single subtraction operation

    • Simple ternary expression

Risk Assessment
  1. Current Implementation Analysis - Immediate gas costs are minimal (210 gas)

  • Function is marked as view, preventing on-chain gas costs

  • Basic arithmetic operations are efficient

  1. Architectural Considerations - Function is part of core game logic

  • Called frequently during active games

  • Cumulative effects across users could be significant

  • Simple enough to warrant optimization

  1. Future Implications - Potential for increased usage as game grows

  • Could impact scalability

  • Sets precedent for similar functions

  • Affects overall contract gas efficiency

Recommendations
  1. Optimization Suggestions```solidity
    function getTimeRemaining() external view returns (uint256) {
    uint256 timeDiff = endTime - block.timestamp;
    return timeDiff > 0 ? timeDiff : 0;
    }

2. **Alternative Implementation**```solidity
function getTimeRemaining() external view returns (uint256) {
if (block.timestamp >= endTime) return 0;
return endTime - block.timestamp;
}
Justification

The Medium-risk categorization is maintained despite low current gas costs because:

  1. Architectural Impact - Function is part of core game logic

  • Frequent usage during active games

  • Sets precedent for similar implementations

  1. Scalability Considerations - Potential for increased usage

  • Cumulative effects across users

  • Impact on overall contract efficiency

  1. Best Practices - Following optimization patterns even for efficient functions

  • Maintaining consistent coding standards

  • Considering future scalability needs

Additional Context to my Finding

While the current gas costs are minimal, the risk assessment considers both immediate and long-term implications. The function's role in the game's core logic and potential for frequent calls justify maintaining the Medium-risk categorization, even with the low current gas costs of 210 gas.

Verification Method

Gas costs were verified using Foundry testing framework:

function testGasForGetTimeRemaining() public {
uint256 gasBefore = gasleft();
game.getTimeRemaining();
uint256 gasAfter = gasleft();
uint256 gasUsed = gasBefore - gasAfter;
emit log_named_uint("Gas used by getTimeRemaining", gasUsed);
}

This finding contributes to a comprehensive security assessment by highlighting the importance of considering both immediate gas costs and long-term architectural implications in smart contract development.

Updates

Lead Judging Commences

m3dython Lead Judge 5 months ago
Submission Judgement Published
Invalidated
Reason: Non-acceptable severity
Assigned finding tags:

Gas optimization

Strategy to save gas and minimize transaction costs

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