Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c50c0bc66e043743cd5809c111574167797eeaf3917bbd8c63381b5629d6e56b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^