Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c70443a835d86fae13b4c0570f86301fd9548b28f1190affa6c7e82af0477a8e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^