Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7d5f0a29e89b3d889d5d7875601998a4a9166e68e9355e77e121dc4ee880ffd7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^