Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 446abfc20452308ea5084a7fb99a3eb63add7a196514f3cf1107ef927533e59c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^