Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3ddc259e531b3c561167295e58f65192c3630e75184e39ebc632b5c28a44dc16:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^