Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 065ae501e2244b2b238c5137e2bcbcbbe13887d32235afeaa6aa163b54b52ced:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^