Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 214a893c1a64098cd5c8d92a2947e098dff2d76fca499b272bc339e51a8f73a4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^