Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 80036cb2e0b682fe6272e1ef81ca23c262263c93dc7554e18ea48301b03e8f05:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^