Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 07886137170a92e8b937917b82e6afe4db43ec2ad120b16b746e6af865984845:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^