If you can spend from it, you move its balance to your main wallet, this is the 3rd and final transaction.
what happen if the third transaction is undone?
What do you mean undone?
Sorry i mean , what will happen if the blackbyte side (the receiver of GBB) don't send coins from smart wallet to main wallet? i.e. if there is not the right amouont of amount of bytes to cover fees
the receiver dont need any white bytes to receive blackbytes, only the sender paid fee
No dude , you are wrong!!! PAY ATTENTION blackbytes have to be transfered from smart wallet to main wallet and bytes needed to pay tx fees (2336 for 0.4 GBB),!
PS
"1% I reserve for myself"
Do we have to believe if you only get 1%?