Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ab9bb2163bac5dc579215e7544cf4796bde303203a727b338560d5dc235f7270:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^