Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 71ceb4a9a877d14ff969d3667bb173f745970470b015724ee8ed5ef77443efd6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^