Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5075b8804d919de69fcbe767d03875cb6ba17f31f6a7a19f2463ecb79c96c149:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^