Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ee39afb0648e066e6a8549a57477924cfd3dbacf9a6e92caea14d034cfbf1a7c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^