Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3f7a5556fa900513fd2bc9e105a8c6f56753fca321f9bd9e51cb123681de9fe5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^