Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d86689614767719df20943c9dba1dfadc4e8ab5249884220410a95e711b8dcd2:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^