Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 68e17a1e2e8818bed2e45662a92a53722c326df0c952b2e796f80f35328a939f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^