Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b84b7b657484e10d90973404cbf6048e0c610f056078671c15652d848bac1adc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^