Token transfer fees
Description:
If the collateral token (USDC) uses a fee-on-transfer mechanism, the actual amount received by the vault will be less than the deposited amount. The code does not account for this, leading to incorrect share calculations.
Impact:
Depositors may overpay for shares.
Internal accounting discrepancies.
Affected Code:
PerpetualVault.sol#deposit()transfersamountwithout checking the post-balance.
Recommendation:
Compare balanceBefore and balanceAfter transfers to calculate the actual received amount.
Lead Judging Commences
Informational or Gas
Please read the CodeHawks documentation to know which submissions are valid. If you disagree, provide a coded PoC and explain the real likelihood and the detailed impact on the mainnet without any supposition (if, it could, etc) to prove your point.
Suppositions
There is no real proof, concrete root cause, specific impact, or enough details in those submissions. Examples include: "It could happen" without specifying when, "If this impossible case happens," "Unexpected behavior," etc. Make a Proof of Concept (PoC) using external functions and realistic parameters. Do not test only the internal function where you think you found something.
Informational or Gas
Please read the CodeHawks documentation to know which submissions are valid. If you disagree, provide a coded PoC and explain the real likelihood and the detailed impact on the mainnet without any supposition (if, it could, etc) to prove your point.
Suppositions
There is no real proof, concrete root cause, specific impact, or enough details in those submissions. Examples include: "It could happen" without specifying when, "If this impossible case happens," "Unexpected behavior," etc. Make a Proof of Concept (PoC) using external functions and realistic parameters. Do not test only the internal function where you think you found something.
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