Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 507abb1fe3133c7373708348a1d8b8aa12dc6d0e421a5a8b9947b7e84c6897a3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^