Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f10190877cc0c2f87489feaccc98492942efadec4e95ecaae05b06b3ed9fb46f:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^