Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 30163aaac334e389d16a5f222eeb16fa332b50aa90e47359d3f76524da734ba9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^