Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3d5ef23c5ee468d67a79dc1843780a67dba1166afc393ae827f7066020c5a822:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^