Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 69e398b6a03ea6948f6f66c895f26892395b8455eca465cf1cf07d2dbbfd9759:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^