Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8af203a2ce5c946777811af1c32971642c42bb1ac7a373e1ec2b662e00eeaee3:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^