Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d9d2392a67c53e3253d5f9479c940fe8dfb27e69eaac021f4ab25603501435d0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^