Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 26809f3d5a95b2c1f09f12af87ac052bd181705086d6455305a02728cc862989:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^