Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 38c90221b212710b80ee2392df62e318d21b6f54c84795a95236ce38a9e25d0b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^