Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e25b07e6ac4d2cb372ea33716f22cbe1b62b3fb809619f499ece64cd929f9942:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^