Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bcaf1ba90939fece98a15d1c6c8dd02c2528b350d78e11d639556cb73ce7bfc1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^