The Pools.mintSynth function does not check if base is one of the base tokens. One can transfer tokens to the pool and set base=token and call mintSynth(token, token, member).
The _actualInput = getAddedAmount(base, token); will return the token amount added but use the ratio compared to the base reserve calcSwapOutput(_actualInput=tokenInput, mapToken_baseAmount[token], mapToken_tokenAmount[token]); = tokenIn / baseAmount * tokenAmount which yields a wrong swap result.
It breaks the accounting for the pool as tokens are transferred in, but the base balance is increased.
The amount that is minted could also be inflated (cheaper than sending the actual base tokens), especially if token is a high-precision token or worth less than base.
Recommend checking that base is either USDV or VADER in mintSynth.
strictly-scarce (vader) confirmed:
strictly-scarce (vader) commented:
