Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f7704452a1ebc86f4c63ada7b14da965379c062b745a1ff4c34143e7a9150a75:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^