Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5036bc8e5e279a4ef5bdb8e642d4314236cda7edbbc57d708e5c910738b9731a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^