Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fe1fbeb8922a68a78105cea3c939552611f538ab12f6ab0c4a1f0ffb3bb0e485:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^