Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c7c64833545b40095bd732cd6be3b24aa17163c62812f0b8a61a58bcb37f2308:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^