Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8e83f16a188c5baf8fe000f7cfafb2ae6f8cd099aed5a13d286a33a41f2ee31d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^