Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 03f1a44672cee52f802ad480bf6a9bf723fc028645a4edb7d1b9b227da27a36f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^