Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 54726d986a727ebf3899d960965c29e500b65b9e9cf3d603cd902c62cb94d6d9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^