Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ece2bc904c2d845d52165a6fd23388d6d5dc5780437fdec6c3407402db832aee:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^