Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c33e2550bf95d1d2bb7f8a7397c5d177b865014d14cb09188c45520b3198ad99:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^