Integer division in fee computation causes rounding loss, leading to permanent undercollection of protocol revenue

• The protocol earns money by taking a fee from each order’s priceInUSDC

However, due to integer truncation, any fractional remainder is silently discarded. Over time, this causes the protocol to lose revenue, especially on:

• Low-priced orders (where rounding loss is proportionally large)

• High-volume systems (where dust adds up)

• Repeated micro-orders (e.g. bots or retail users)

In fee-sensitive systems like this, even tiny rounding errors directly affect earnings.

Risk

Likelihood:

• Happens deterministically across all orders with fractional fees

• Solidity has no built-in rounding — protocol leaves money on the table

• Anyone can trigger this unintentionally (or intentionally with low-value orders)

Impact:

• Protocol earns less than expected fee revenue

• Buyers pay correct amounts, but seller receives more than they should

• Over thousands of orders, fee slippage compounds

• May impact long-term sustainability or tokenomics if fees are relied upon for funding ops/staking/incentives

Proof of Concept

Shows how the loss can affect protocol

Recommended Mitigation

Include this rather