Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e43c651c89e4e4d8be20ab97ef96c900b9e58c18dc1411b382f81d3997d4288c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^