Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 38b9f0692418831c8bbdfb8047242b6574d15bee1977185a8448212c4b546920:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^