Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2bf5f0350d776e21be6196d33f2ba3de72b2b60a83c62aa8ca6a14780312b8f4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^