Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8cc30093ce1976340ffc93834a1cd89f54077caf6b85f486213b5706a3cf8375:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^