Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6f4e45d4f035ea0ec6295c30b595077ee9b2d980a6242833acd4ce3d3a9b92ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^