Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9df43f04c6acd065b3e55468b170e2ae38f039eb24b13182a052dd5cc011c604:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^