Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 214502344b9522b1f8ce6e7170ad21cfb0fee1d29c774c944ed00f7bc564c652:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^