Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5a6fbafee10b46abd4bf2312eb66a4c18f185c81e6974cf61e42afe7a8468e21:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^