Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 795ca912767c24059e0cde8cfa7a3e7c35e9de4ba326c346c80ec2ffe2f0921c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^