Omniscia Alliance Block Audit
Token Payment System Security Audit
Audit Overview
We were tasked with performing an audit of the Alliance Block codebase and in particular their newly introduced session, subscription and payment verification portals meant to integrate with the greater Alliance Block ecosystem.
Over the course of the audit, we identified certain flaws relating to Uniswap fee assumption in all price measurements as well as an important flaw in the VerifyPaymentPortal contract's access control affecting user funds.
We advise the Alliance Block team to closely evaluate all minor-and-above findings identified in the report and promptly remediate them as well as consider all optimizational exhibits identified in the report.
Post-Audit Conclusion
The Alliance Block team provided alleviations for all exhibits identified within the report and opened issues on their GitHub repository detailing the actions they took as well as providing additional background as to why some exhibits should be considered as void.
All exhibits have been adequately dealt with and certain exhibits have been set as nullified based on the code's initial implementation fulfilling the intended purpose of Alliance Block in one case and the Chainlink system containing a potential edge case that the Alliance Block code accounts for in its original implementation.
Contracts Assessed
Audit Synopsis
| Severity | Identified | Alleviated | Partially Alleviated | Acknowledged |
|---|---|---|---|---|
 | 0 | 0 | 0 | 0 |
 | 3 | 2 | 0 | 1 |
 | 3 | 3 | 0 | 0 |
 | 4 | 4 | 0 | 0 |
 | 1 | 1 | 0 | 0 |
During the audit, we filtered and validated a total of 1 findings utilizing static analysis tools as well as identified a total of 10 findings during the manual review of the codebase. We strongly recommend that any minor severity or higher findings are dealt with promptly prior to the project's launch as they introduce potential misbehaviours of the system as well as exploits.
The list below covers each segment of the audit in depth and links to the respective chapter of the report: