Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 36dddbae31373e733f3ee64e0ea48c9c94286ee146271191a7234f9ee3846c80:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^