Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 26fb2d672c0c95ddd7b3a42dfe836297effc7b329abeeecc9b94b060b4320422:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^