Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 03fb9ecbf0dead5be3933b6dfab938229a79155949bb14c65de060d8c48e0474:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^