Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 88258adfa90936a3c357e4db970950148d6ab863bd4a8e3c594e89fa54f38f92:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^