Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 729e2724f40258bc2ef26d0ad730d1908a7a3a3a58f0389ff468d43cf383fa79:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^