Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0f200438a9fe42dd5e7ca5523f3569f744d643ea9427c5cc2dc3a234d17d2a19:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^