I think I like the service you are offering at xmint.org


But I couldn't send, so I cannot answer your question: "What is your invoice id"


I cannot get the id, without sending coins, and all I have is a smartcoin wallet and bitcoin wallet.


So, you would need to accept smartcoins, and then I could send smartcoins, and have the smartcoins exchanged into bitcoins.
I would really like that.
That would make my day, if you would accept smartcoins for exchanging at xmint.org