Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9d261825c31cf9a2125d58fe74ab4ba4ca7aa81eb35dbd0e917693074f608346:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^