Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2be06891ad546848bde2830b2673d85a2195f93c0e5f6d29e79ebca36cc33e60:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^