Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0c07dca1623152cc1bec8164de42f013552a79b353f3166cb030fb88e83d015d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^