The Mismatch: Uncovering the Metamask Wallet’s Failure to Display Correct Weth Balance
In a recent blog post, users, noticing an inconstency in Their Metamask Wallets’ Displays of the Weth Token Balance. While the token contract Address was correctly provid axis 0xc78417e063141139fce010982780140a0cd5ab on execution, the actual balance displayed in the wallet was significant -lye different from what it should be.
The code: A Glimpse Into Metamask’s Internal Logic
Upon Closer Inspection of the Code Responsible for Handling Weth Transactions and Displaying Balances Within the Wallet, A Peculiar Discrepancy Emerged. The Token Contract Address Provided to Metamask is correct, but the resulting balance displayed in the wallet does not match.
To investigate this anomaly further, we analyzed the code and identified a potential issue in How Metamask Handles Weth Balance updates. In Essence, the Problem Lies Within the Way the Wallet Interacts with the Token Contracts Internal State.
The issue: Misaligned Token Contract Interactions
The Wethalanceeupdated Event Emitted by the Token Contract Upon Successful Transaction Execution Contains a Crucial Piece of Information That is being misinterpreted in Metamask. Specifically, The Event Includes A Timestamp for When The Balance was updated, which should be synchronized with the wallet’s local state.
However, due a design flaw in the codebase, The Timestamp is not consistently reflected across all clients, including Those connected to metamask. As a result, when metamask updates the token contracts internal state, it does so out of sequence with the wallet’s local clock, leading to an inaccurate representation of the balance.
The resulting consequences
This discrepancy in Weth Balance Displays Has Several Consquences:
- Incorrect Display
: The User is Seeing A Significantly Different Weth Balance Than What Their Wallet is Reporting.
- Potential Security Risks : with Incorrect Balances, Users May InadvertLy Transfer or Lose Funds Due to Misaligned Transactions.
Mitigating the Issue
To Resolve This Issue, Metamask Must Address Its Internal Logic and Ensure That All Clients, Including Those Connected to the Token Contract’s Smart Contract Interface, Accurately Synchronize Their Local State. This Involves Updating the Codebase to Correctly Handle Weth Balance Updates and Ensuring That Timestamp Synchronization is implemented Across All Client Applications.
Conclusion
The mismatch between the Weth Balance Displayed in Metamask Wallets and its Actual Value on-Chain Highlights A Critical Flaw in the Wallet’s Internal Logic. By Understanding the Root Cause of this issue, we can work TOWARDS Resolving It To Provide More Accurate and Reliable Results for Users.
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