Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 428521e9b5765a98fee539bc8e70808376f2295d4dab63a6d153dc37cbc138db:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^