Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1ac481c9c2822dfab9daad29dada4d1814f8093317242fc1ceb8533a4c56a8a5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^