Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d5a255ddd6faec77f210568e098848ccc4384e0e70607d41873a50f96346c73c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^