Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6b621439cfda9ff31ec1b8130ba97ebcb274e62654204c24b376fff32706b3e0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^