Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b23df1ded6050a0985c576feff4974db7f6fccdd2931b4504870abd630797933:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^