Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0e8e6f60c30fc210da7b9d74067154b7f987a41390769037d4fa4fe2bce5aacd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^