Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9fc4a5edba5bd430ab2dd91d1962031f630699bf4f347d4b3b16ed28397a5cd5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^