Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d835ad3c4bdc17bd341ae2fb46a734720dcd25708fb522e7ea7263f432f2ca6d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^