Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3b82dd26194c95fa7dbc68c25dd629c3c6627ce3bfd19b354511724f36f79238:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^