Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f1bbfc963808d1016df9732dc17ee0f2461c0f11028219c32ebfe9227687ab1b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^