Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d51bfaa85328c79d33222d7c58f7040d9a4d7b3b918798a55033d8250648d1ce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^