Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c910d3e84e5cab97b3325f1c417d34470c944ca4ae7f6ddc33fca5816fe078e6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^