Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7cacff73bf7ce5993d4bb09e5a851176e31a1be7e57403168ed91e2f1383e0ee:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^