Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5dd3011ebdd295c0073aaf3ccbd590940002a81c564052da72e6c5259cf0b302:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^