Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6949fde0a56185f134b9ba05584b8a146fbf60a7c25811fc1f0d66be6295b564:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^