Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8be3bcbb378ea6e5af69aed9db3383bf89715b8d73b92899119025627cc0c232:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^