Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 380bbeb63e6c1dd47e86d1529929378cee04804b2c0a2bf8549629ecbedea005:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^