Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a5bed7b04f41112651008321831d41fa983091be84fcd3880618de3d949bc0a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^