Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e98d047e0dd8b4d36f2135a68a49d141bb3c9b53207097258baf0d852746ec08:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^