Raisebox Faucet

Description

Contract Reference: RaiseBoxFaucet.sol

The RaiseBoxFaucet contract contains unused code elements that do not affect functionality or security but impact code clarity and deployment gas costs. Specifically:

1. Unused Error:

   • The error RaiseBoxFaucet_CannotClaimAnymoreFaucetToday is defined at line 87 but is not referenced in any revert statement within the contract.

   • Code:

     error RaiseBoxFaucet_CannotClaimAnymoreFaucetToday();

2. Unused Import:

   • The import statement import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; at line 4 is not used, likely because the contract inherits from OpenZeppelin’s ERC20, which already includes IERC20 functionality.

   • Code:

     import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

Slither References:

• Unused Error

• Unused Import

Severity

Informational
{ Impact — Negligible, Likelihood — N/A }

• Impact: Negligible, as the unused error and import do not affect contract functionality or security. They slightly increase deployment gas costs and reduce code clarity.

• Likelihood: N/A, as these are static code quality issues, not exploitable vulnerabilities.

Risk

• Likelihood of Issue: N/A. These are static code issues present at deployment, not runtime vulnerabilities.

• Potential Consequences:

  • Code Clarity: Unused error and import may confuse developers or auditors, suggesting incomplete or outdated code.

  • Gas Costs: Both issues increase contract bytecode size, adding minor gas overhead during deployment (e.g., ~1,000–5,000 gas combined).

  • Operational Impact: No runtime impact in a testnet faucet, but code clutter may hinder maintenance or future audits.

• Contextual Factors: In a Sepolia testnet faucet, where gas costs and asset value are minimal, these issues are minor and primarily affect code maintainability.

Impact

• Code Clarity: The unused error and import reduce readability, potentially leading to developer confusion or misinterpretation of the contract’s intent.

• Gas Costs: Minor increase in deployment gas costs due to larger bytecode size (e.g., ~1,000–3,000 gas per issue). No runtime gas impact.

• Testnet Context: In a Sepolia faucet, these issues do not affect user experience or security, as assets have no real value, but they reflect suboptimal code quality.

• Limited Scope: No security or functional impact; purely a code hygiene concern.

Tools Used

• Aderyn: Detected the unused error and import in RaiseBoxFaucet.sol.

• Manual Review: Confirmed that RaiseBoxFaucet_CannotClaimAnymoreFaucetToday and IERC20 are not referenced in the contract.

Recommended Mitigation

• Remove Unused Error:

  • Delete the unused error to reduce bytecode size and improve clarity:

    // Remove

    error RaiseBoxFaucet_CannotClaimAnymoreFaucetToday();

• Remove Unused Import:

  • Delete the unused IERC20 import to reduce bytecode size:

    // Remove

    import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

• Consideration: Verify that no other contract or future updates rely on these elements before removal. Compile and test the contract after removing to confirm no unintended side effects.

Proof of Concept

1. Unused Error:

   • Observation: The error RaiseBoxFaucet_CannotClaimAnymoreFaucetToday (line 87) is defined but not used in any revert statement, as confirmed by inspecting the contract code.

   • Impact: Adds ~1,000–2,000 gas to deployment costs and reduces code clarity.

   • Fix: Removing the error eliminates this overhead.

2. Unused Import:

   • Observation: The IERC20 import (line 4) is not referenced, as ERC20 inheritance provides all necessary functionality.

   • Impact: Adds ~1,000–3,000 gas to deployment costs and may confuse developers.

   • Fix: Removing the import reduces bytecode size.

These issues can be verified by compiling the contract with and without the unused error and import, observing a slight reduction in deployment gas costs (e.g., using forge build or similar tools).