Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3037388b77920ffba3404336e4ef3e66c614057dd5e8ba31d0cb6c4b02d12437:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^