Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 27595e8a35be4007e3d628d98a32a0ad824eb178c9be238c5b195f18ac6f1fb6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^