Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 03f1db28116bd0b833e42e1e5a9aec346c1f15b51cb4e3e42a771a4391e5ded3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^