Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6827cdf548d324d0a27635b9735b825fa84d89c28a2c96ba7cecf4c3a7847b28:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^