Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f2f62358b07509e9be8dbed9c103edf6784ddbef4b883a03cc4c717a58f3423:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^