Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5e9bd7ca8c01921a3515f05f80377b5989054b59704454f608bdf8f98a50444b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^