Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4cf332fd2200a4d56448eca19085c85c48c7e472bf21939a26aa1f123eb77008:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^