Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4c7397b121c2f8b2da5a86eb197416b238a0d40370fd332d78fd1d0cf590dd87:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^