Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28181f90a21ec40f16d766b0af41b948acbe7f6f1ef16f14b24691c12241eab2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^