Summary

Insufficient Balance Check:

• _validateTransaction: The balance check is performed after the nonce increment. If the transaction fails due to insufficient balance, the nonce is still incremented, potentially causing issues.

Vulnerability Details:

• The current implementation leads to nonce incrementation even when a transaction fails due to insufficient balance.

Impact:

• Unnecessary nonce increments on failed transactions, which can cause issues such as transaction invalidation and sequence mismatches.

Tools Used:

• 👀 (Visual Inspection)

• Audit Wizard

• AI

Recommendations:

• Perform balance checks before incrementing the nonce to avoid unnecessary nonce increments on failed transactions.