Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2e50092a89bc51f9a3c0d4b16fab62ced574c8a7a526d06ce34d96d5a6f59787:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^