Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2d155d30b0cd7acb9e7b973ea75df8f24798a23e0534e62070898046c93cc353:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^