Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7d8ff20d4038be668d1adae7d9e02054f86196c20236dbb549d2ab9f14ea3cf5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^