Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 607a55c1c944230ca1a7c4f47d69a2f4fc6a3196d7b58f0198de3f5cd03db275:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^