Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 68a194608e453e1907e3d49894ae50f2caf032df47e1169dde96e00cece59464:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^