Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 96ae664559cbbf8360a44e8d78b4fab2015d282a7040c26a7d402e5d2b729e85:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^