Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b806ec000cae1dc6febbb63da288018067d1f8d6d2a24570018e48fb0c2ed825:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^