Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c5cc040cdc381a692b53c826423723e1d6210995df4cd0e31f1fbbd4537bd08d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^