Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3d6d144373694d163db208aa86a94563b5855c85c98e17e9fe69a73520a6bf2e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^