Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 16db9f179b0feb5b8387fac772d722e752cabbc57e96493715d3c327c0b5f05a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^