Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d010efbd1398eadb53a57cde9a87affaf9b441417b81ddf37a4eecc99bee1737:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^