Security Audit Report for Multichain veMULTI Contracts


Multichain is the ultimate Router for web3. It is an infrastructure developed for arbitrary cross-chain interactions. The core contracts covered in this audit include the veMULTI contracts in the code repository. The iterative audit covers the code in the initial version, as well as subsequent versions to fix discovered issues, as detailed in our audit report. Please note that external dependencies are assumed reliable and are therefore excluded from the audit scope. Our audit methodology employs automated vulnerability scans, manual verification, and business logic analysis to uncover potential security issues coupled with gas and code quality optimization recommendations. In summary, we did not find any critical issues within the audited codebase. However, we have identified nine non-critical issues that should be addressed. Additionally, we have put five recommendations to further strengthen the code logic. It is important to note that the scope of our audit was strictly limited to the specific code versions mentioned in the report. Any updates made subsequent to our review would require a re-evaluation.


In total, we find 9 potential issues in the smart contract. We also have 5 recommendations and 0 notes, as follows:

High Risk: 0
Medium Risk: 3
Low Risk: 6
Recommendation: 5
Note: 0
ID Severity Description Category Status
1 Medium Unchecked ERC-721 Callback Result Software Security Fixed
2 Low Improper Check for the Return Values of the transferFrom Function Software Security Acknowledged
3 Medium Incorrect Address Used in the _burn Function Software Security Fixed
4 Low Access Out Of Bounds in the getBlockByTime Function Software Security Acknowledged
5 Low Unchecked Arrays in the claimRewardMany Function Software Security Fixed
6 Low Inconsistent Implementation of the Burn Logic Software Security Fixed
7 Medium Inconsistent Handling of Epoch Time DeFi Security Fixed
8 Low Inconsistent End Time in the addEpochBatch Function DeFi Security Fixed
9 Low Inconsistent Implementation of the Reward Calculation DeFi Security Acknowledged
10 - Check Zero Address In the ve.ownerOf Function Recommendation Fixed
11 - Implement Secure Logic for the transferAdmin Function Recommendation Fixed
12 - Avoid Continuous Divisions in the _pendingRewardSingle Function Recommendation Fixed
13 - Alleviate the Concern of Potential Centrality Recommendation Acknowledged
14 - Follow the Checks-Effects-Interactions Pattern Recommendation Fixed

More details are provided in the audit report.

Take the first step towards a secure future

Reach out now for BlockSec's expert code audit services, elevate the security of your protocol before it goes live!