Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7a51585a705852f8950c83198b69ad9f640e92eb3b4a06d4498dab984cd0a24a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^