Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4d89bc8e15ac390c04ed06797db29dfd8f8f82c963c33cdf82fc93d0976660a3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^