Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 74000a9c974241abbad59cf9631777828127cb15def9a3d6fe617ddcba41d097:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^