Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3cdf9a3d2794fdb21ed3fe98809705290e700403ff14e2f56bee0ce657534361:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^