Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d1966e220c43ced8990a948a1f620bfdd14658391cdd94052247b853d52cdb04:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^