Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 16843bc8a683ed17818beee369450a692dfbff3cf1d5af265ae0e4d38008fca5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^