Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4afa2804d331233ece1fcf7d5d4259568ff116b49e22f998e28831761aeb7d87:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^