Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9e118d1ae457efd38c20a344843d311bf7ecb5d335618e25d01ce42b562d6f3b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^