Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c103e08e9c4fa97af04eedb5f76150f6fb315658c17fe4704e2a4519b0ee18d8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^