Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86b338a4df3a67fae0c4fb14d1c1a57d30745b8e0e0683ecc484d7b9369a2f54:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^