As for this transfer transaction CrytoCracy2020 talked about, the alphanumeric string (B9KEBf3vUtZkBwm8vVJYefB9Xn1S8k8YBz) in the attachment is the address where the real XBY needs to be send to. You can find this transaction here in the XTRABYTES blockexplorer. Needles to say that the amount you can see in the blockexplorer is after the transaction fees had been deducted. As you can see in the WAVES blockexplorer the recipient of this transfer transaction was the gateway wallet (or creator wallet if you will) 3PCfwK2hgYjoKwsgRg7wgBSYF3EXSgXyXfn, and if you look at the XTRABYTES blockexplorer you can see that the sender was a regular XBY address BHr887z8M9vZCxSSu8Kn7A6bvsE6cd6Y8n and not the gateway address 3PCfwK2hgYjoKwsgRg7wgBSYF3EXSgXyXfn and the receiver address was B9KEBf3vUtZkBwm8vVJYefB9Xn1S8k8YBz the alphanumeric string that could be found in the attachment of the WAVES transfer transaction.
So yes this was a withdraw of XBY from the WAVES DEX that passed through our gateway, wXBY tokens from the user account to the gateway address and real XBY from the gateway to the users XBY address. The transfer of the wXBY tokens to the gateway address triggered an XBY transaction from the gateway address to the address in the attachment.