Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c983bed309ba3a2001f8a9958a2a3a8d08cbcc65048da8c9dcba85d885feeccc:16:32
   |
16 |                                 var total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^