Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1533343959a1d2672efbd7172830abf917c87d8f54d125c6efb60273f5b30606:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^