Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b63a8e91407d6859ae24e4ef78b033cbd265fa4bd3b6a46f3737af04274f8e78:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^