Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a1590651135ad6197cfed87c1faca9eca9f89d72d1d9bf4488910aaeba1af6e8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^