Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a29011073c629724aeaf1f636120d5e6dfea843c4c5918d85cc68129e200d781:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^