Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d8693d6525ae89f3ba34abdb49ef4e7c7350c4a3bab1c0473df5562771c3b84b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^