Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 974abd8cc15a1223100ab6b5c8e2485e58e9df9d5afbca7d95f5165790f24609:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^