Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 63dd644fa5645bbfbdfcd2bd16de368ad095b2af164268c3a536a15c4ca56337:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^