Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 687468c6db7d6dbb54191f0a2f3435078c3709b9930a7e93a89243f42a251de5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^