Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d83b0f64d4cae9bb07c67c353f62ebce3905da0d182884b52fbdb243aa3ac793:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^