Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0bd9d0c7ea190480234938711be5abb39a7d6a1d7f8ef5152fa935e68c3ed408:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^