Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1660b29e692a481b418dc69f8cacb3cddb73ce6bd29dab4d2335dc77101a19dc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^