The Standard

Summary

The SmartVaultManagerV5 contract lacks events for critical state changes, including updates to mintFeeRate, burnFeeRate, and swapFeeRate. This absence of events diminishes transparency and external monitoring capabilities, hindering the ability to track important modifications to the contract's state.

Vulnerability Details

The critical state changes mentioned above, specifically adjustments to mintFeeRate, burnFeeRate, and swapFeeRate, do not trigger corresponding events in the SmartVaultManagerV5 contract. Events serving as a crucial mechanism for broadcasting important changes on the contract, allowing external systems and users to monitor and react to these modifications. The absence of events for these critical state changes raises concerns about the transparency on contract.

In the SmartVaultManagerV5 contract, the critical state changes related to adjustments in mintFeeRate, burnFeeRate, and swapFeeRate lack corresponding events. These state changes are significant as they directly impact the functionality and fees associated with the contract. The absence of events makes it challenging for external systems and users to monitor and react to these modifications effectively.

Examining the relevant portions of the code:

Here, the contract declares public state variables for mintFeeRate, burnFeeRate, and swapFeeRate, indicating that these values can be modified externally.

Considering a function that adjusts one of these critical state variables:

In this example function (similar patterns are found for burnFeeRate and swapFeeRate), the mintFeeRate is updated by an external owner. However, there is no corresponding event emitted to signal this change. Events play a vital role in notifying external entities about important state changes, ensuring transparency and auditability.

Modifying critical state variables.

By emitting an event (in this case, MintFeeRateUpdated) when critical state changes occur, the contract provides a clear and auditable record of these modifications, enhancing transparency and allowing external systems to react accordingly. This practice is crucial for maintaining trust and facilitating effective monitoring of the contract's behavior.

Impact

The lack of events for critical state changes results in diminished visibility into significant alterations within the contract. External entities, including users and monitoring systems, may face challenges in staying informed about crucial updates such as fee rate adjustments. This could lead to a lack of trust, as users may not have a clear view of the contract's current state and configuration.

Tools Used

Manual Code Review

Recommendations and Vulnerability Details

To address this vulnerability and enhance transparency, it is recommended to emit events for critical state changes. Including events for modifications to mintFeeRate, burnFeeRate, and swapFeeRate will provide an auditable trail of these changes on the blockchain. Here's an example of how events can be implemented:

By incorporating events in this manner, the contract ensures that external observers have access to real-time information about crucial state changes, promoting transparency and accountability.