Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7f4c5b2ac735bb0fdb9071129e95bfcd9d973012336fb035b17c44b5e13090c8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^