Submitted by 0xRajeev
The Tracer protocol like any other allows market creators to charge fees for trades. However, a malicious/greedy owner can arbitrarily change fee to any % value and without an event to observe this change or a timelock to react, there is no easy way for users to monitor this via front-end or off-chain monitoring tools.
The impact is that, if the users are trading on a market with 0.1% fees and the owner suddenly changes this to 100%, the users realise this only after their trades are executed. Market loses confidence. Protocol takes a reputational hit.
See similar Medium-severity finding in ConsenSyss Audit of 1inch Liquidity Protocol
Recommend implementing an Emit event, and providing a timelock for users to react and establish an upper threshold for fees that is decided across markets by governance.
raymogg (Tracer) confirmed:
