Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6a85f5b56ed4b413f4109b27d53d580876f8c121bd65de5fff36cf571adaa56a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^