Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c9da63034e864bf1c9d4b85a636f9727222e23dba7a32edc3e801b2171b75bf2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^