Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 39551f6613741ebdb78f931a1e8717c831b069b2a391b6e3942fd13e3c56e533:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^