Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 78f5de3a323ec4ab073ca6547a9532d07431678f3f439bcff145dc3b3a4bed59:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^