Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 92bc040ab57a0c5794607cb2441f0c7399dc08b7e19d8d67d053aeb42b271024:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^