Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28317aadfa8a204e436c6ffdae506c9b401baa7cf2071c108874d03fd7e291c3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^