Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6150fe4862f21ac6eb73e91a44de3b34e89697c0839d125b9b608e923871f7f8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^