Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6b852fef60ff89f84a10f808c2d9daecd8302b0b8a39187446eae2cfdad67f66:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^