Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c88f745aa9e839ff5f9096f6b54fb9874b7642179aa8db3f2b4b26067940efa5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^