Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> abdc0c8022eb5f079f3876ece8f346ec909709798549fde4bbdd10b7e7b717ab:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^