Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a78e66a543a1a6d8a1014538f91b41c8b43ff93520ade329c44d1ab94158b96f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^