Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9ea690769f070b834c87e2891c9dff21bb737dfa405b0d22aef8c741517c1f67:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^