Mismatched transferTip condition between token minting and burning

There is a mismatched condition between token minting and burning. The receiveMessage function has a stricter condition for minting tokens, as it fails when the transferTip is 0. On the other hand, the bridgeBack function allows burning tokens even when the transferTip is 0.

The warp.green team provided the following response:

The difference is because mojoToTokenRatio is either 10^6 (Warped XCH) or 10^12 (any other Warped CAT), so transfer tip will be higher than 0. When bridging back, you are cutting decimals, so we wanted to enforce a minimum tip.