Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3f273c147cc0112ffba78dbdd9f799c8353e3c381a69228d613f9698763b666d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^