Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 52a22c0204b1c0028d5a3ea9bf873ffbd7c80bac205cb93f85def079ea3dd04f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^