Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 190145c1cabf6bd869f7cd8125f77c4be06c5cc57e5986b11214f3e2b373efcc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^