Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 53620788fde02e1a75528aeb5be4b9f4c07918a1c683ba92de097ffdf3a9541e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^