Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c4fdde8500e2e189f636c9b7725a29034557dea2c132b4a892a0f9f3e1167c92:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^