Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c9acea00ed3e82a61416c9b389d9a8f48343cdd3835a0b1844184bbcc666683b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^