Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4b27d25aaed1fba5b10b7d664b8830345d71b6400ed44179908c43ec730ab6d8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^