Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28887366bea8c7769a8da507d80309696bf6b69f9ac3a060b2a933b6ea8a4e17:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^