Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6d803702925648d89aad7810b69625243b0d2fe41c19dffd94d0ddfb6eb64de7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^