Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6d102596927cbbcde2887d1cfb56032fc17c54283e51d5be1449e11f6ebe7214:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^