Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fc3c425bf6df1d93837fa5ba4e5644d1b44aa89df7c6180330b9e6fa2915dc81:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^