Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d4db8b6e5867aed59418810b153a3c0a168dcac6af3acf40b8512c9300c59c59:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^