Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 99827609ada0baa6d90d2c7dc0b0025eba90e89f78a6feb276d7b6c9f03cff13:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^