GAMESBUYSELL Info
GamesBuySell (GBS) combines cutting-edge tokenomics with real gaming utility, creating a sustainable ecosystem for players, investors, and the entire gaming community.
Team and KYC Verification
The team has securely submitted their personal information to SolidProof.io for verification.
In the event of any fraudulent activities, this information will be promptly reported to the relevant authorities to ensure accountability and compliance.
TrustNet Score
The TrustNet Score evaluates crypto projects based on audit results, security, KYC verification, and social media presence. This score offers a quick, transparent view of a project's credibility, helping users make informed decisions in the Web3 space.
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Summary and Final Words
No crucial issues found
The contract does not contain issues of high or medium criticality. This means that no known vulnerabilities were found in the source code.
Contract owner cannot mint
It is not possible to mint new tokens.
Contract owner cannot blacklist addresses.
It is not possible to lock user funds by blacklisting addresses.
Contract owner cannot set high fees
The fees, if applicable, can be a maximum of 25% or lower. The contract can therefore not be locked. Please take a look in the comment section for more details.
Contract cannot be locked
Owner cannot lock any user funds.
Token cannot be burned
There is no burning within the contract without any allowances
Ownership is not renounced
The owner retains significant control, which could potentially be used to modify key contract parameters.
Contract is not upgradeable
The contract does not use proxy patterns or other mechanisms to allow future upgrades. Its behavior is locked in its current state.
Scope of Work
This audit encompasses the evaluation of the files listed below, each verified with a SHA-1 Hash. The team referenced above has provided the necessary files for assessment.
The auditing process consists of the following systematic steps:
- Specification Review: Analyze the provided specifications, source code, and instructions to fully understand the smart contract's size, scope, and functionality.
- Manual Code Examination: Conduct a thorough line-by-line review of the source code to identify potential vulnerabilities and areas for improvement.
- Specification Alignment: Ensure that the code accurately implements the provided specifications and intended functionalities.
- Test Coverage Assessment: Evaluate the extent and effectiveness of test cases in covering the codebase, identifying any gaps in testing.
- Symbolic Execution: Analyze the smart contract to determine how various inputs affect execution paths, identifying potential edge cases and vulnerabilities.
- Best Practices Evaluation: Assess the smart contracts against established industry and academic best practices to enhance efficiency, maintainability, and security.
- Actionable Recommendations: Provide detailed, specific, and actionable steps to secure and optimize the smart contracts.
A file with a different Hash has been intentionally or otherwise modified after the security review. A different Hash may indicate a changed condition or potential vulnerability that was not within the scope of this review.
Final Words
The following provides a concise summary of the audit report, accompanied by insightful comments from the auditor. This overview captures the key findings and observations, offering valuable context and clarity.
Smart Contract Analysis Statement
Contract Analysis
The GAMESBUYSELL contract implements an ERC20 token with tax mechanism, burn functionality, and emergency withdrawal features. While the overall design follows common patterns on Ethereum, a few areas need attention:
- Precision loss in tax calculations due to divide-before-multiply operations that could result in token loss
- Variable shadowing in the _update function that may cause maintenance confusion
- Use of Solidity ^0.8.20 which contains known compiler vulnerabilities
- Unconventional dependency management using raw GitHub URLs instead of npm packages
Ownership Privileges
The ownership of the contract has been implemented with standard Ownable pattern with renounce capability. The owner retains full privileges including:
- Modify tax fee within bounds (0-10%, capped well below dangerous levels)
- Set tax exemptions for specific addresses (exchanges, routers, etc.)
- Manage DEX pair and router configurations
- Emergency withdrawal of native tokens and ERC20 tokens (except self)
- Cannot mint new tokens after deployment (fixed supply model)
- Cannot blacklist users (only tax exemptions available)
- Cannot upgrade contract (immutable design)
- Tax system automatically disables when ownership is renounced
Security Features
The contract implements several positive security features:
- ReentrancyGuard protection on all external functions that modify state
- Proper bounds checking on tax fee modifications (0-10% maximum)
- SafeERC20 usage for external token interactions
- Tax exemption system for DEX pairs and routers to prevent trading issues
- Automatic tax disabling when ownership is renounced for true decentralization
- Emergency withdrawal functions with proper access controls
- Event emission for all critical state changes
- Fixed supply model preventing inflation attacks
Risk Assessment
The contract presents a LOW risk profile. The main concerns are precision loss issues in tax calculations that should be addressed before deployment. The ownership model is reasonable with appropriate limitations, and the contract cannot be upgraded or used to blacklist users.
Note - This Audit report consists of a security analysis of the GAMESBUYSELL smart contract. This analysis did not include economic analysis of the contract's tokenomics. Moreover, we only audited the main contract for the GAMESBUYSELL team. Other contracts associated with the project were not audited by our team. We recommend investors do their own research before investing.
Files and details
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Findings and Audit result
low Issues | 2 findings
Resolved
#1 low Issue
Variable Shadowing
The local variable '_owner' in the _update function shadows the inherited '_owner' state variable from Ownable contract, potentially causing confusion. Recommendation: Rename the local variable to something like currentOwner or contractOwner to avoid shadowing.
Resolved
#2 low Issue
Missing Zero Address Validation
The 'setTaxExempt', 'setDexPair', and 'setDexRouter' functions do not validate against the zero address for the address parameter. This could lead to accidental configuration with the zero address. Recommendation: Add a require statement like require(account != address(0), 'Zero address'); to the function.
optimization Issues | 2 findings
Pending
#1 optimization Issue
Gas Optimization
Tax distribution calculations can be optimized for gas efficiency while fixing precision issues. Recommendation: Combine calculations and use basis points for better precision and gas efficiency. Pre-calculate constants where possible.
Pending
#2 optimization Issue
Gas Optimization
Multiple storage reads in tax exemption logic could be optimized for gas efficiency. Recommendation: Consider caching frequently accessed mappings or restructuring the logic to minimize storage reads.
informational Issues | 4 findings
Pending
#1 informational Issue
Compiler Version
Solidity version ^0.8.20 contains known severe compiler issues that should be addressed. Recommendation: Update to the latest stable Solidity version (e.g., 0.8.26+) to avoid known compiler bugs.
Resolved
#2 informational Issue
Naming Convention
Parameter naming does not follow Solidity style guide conventions. Recommendation: Rename the parameter to 'taxFee' or 'newTaxFee' to follow standard conventions.
Pending
#3 informational Issue
Dependency Management
Unconventional import paths using raw GitHub URLs instead of standard package management. Recommendation: Consider using standard OpenZeppelin npm packages for better dependency management and security.
Resolved
#4 informational Issue
Non-English Comments
Some comments and context in the contract are written in Turkish. It is recommended to use English for all comments and documentation to ensure the contract is understandable to a global audience of developers and auditors.