Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7cf1df76f9d749c4640f8e2b5cba959414094fa77c0d3d023115dae89474a07a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^