For the reasons cited by HeRetiK. I searched for "bitcoin xpub key" and some of the first results warn about sharing it.

I agree that asking the seller to share his xpub key shoudn't be an issue if a wallet specifically made for my website has been created by him.

Asking for a batch of pre-created addresses also looks to me as a viable idea.

I may even give the choice of the method to the seller...

Thanks for those ideas!

I didn't know about xpub key, thanks. But after some researches, it seems that it's not a good idea to share your xpub key, so I can't really ask this from my sellers.

I cannot ask the sellers to change their receiveing address by themselves, after each sell, this makes no sense.. Imagine there are 3 sales within one minute for example.

So if I understand properly, the "correct" way of doing such transactions (in a way that it's not too hard for both parties), is really to ask the seller to send the money to one of my address, and then forward the amount to the seller.

Thanks for your help.

That would work if I could generate new addresses for the seller by myself! But I guess this is not possible...

I cannot ask the seller to update his receiving address after each sell, that would be way too cumbersome.

Thanks for the reply achow101!

Knowing the receiving address is trivial since I would display the associated QR Code on my website.

I guess the issue is to know the transaction id when a sell is made, so I can validate it!

Should I, for example, ask the buyer to make the payment using his favorite wallet, then copy/paste the transaction id on my website so I can validate it using the blockchain?

Is this something websites/apps do? Ask the buyer to provide the transaction id?

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(I juste read your last paragraph) What kind of "message" are you talking about? A message on my website? A message somewhere on the blockchain?

Hi,

I'm new to the Bitcoin protocole.
So please forgive this newbie question.

I'd like to know if, without providing some kind of "escrow wallet", a intermediary can know if a buyer has actually send an amount of money to another user? If the buyer and/or seller do provide some required information?

For example a buyer goes to my website where is directly displayed the QR Code of a Bitcoin address from a seller. The buyer buys something costing 0.002 Bitcoins from that seller... Is there a way for the buyer and/or the seller to provide me a way to make sure the transaction actually occured or not?

I know most intermediaries, such as exchanges, require you to first deposite money on a special wallet on their side so they can validate your transactions. But is such validation possible when a direct tranfert is made from a buyer to a seller? Again, if both parties do agree for the transaction to be validated?

I could of course ask the seller to confirm that he has received the money... But I would prefere something more robust, something that would protect the buyer too.

Thanks in advance for any tips, links or articles!

I'm not sure about that. Don't forget that Visa, Mastercard, Stripe and PayPal are onboard. And there are more to come...

Think about it: any places (physical or online) where you can currently pay using a credit card could soon accept Libra. Any online site currently accepting PayPal/Stripe could soon accept Libra too.

This may be a huge game changer. And this is not science-fiction, WeChat Pay is exactly that in China.

Hi,

I'm new to bitcointalk and to crypto currencies in general.  I'm not pretenting to know much on the topic. The following is only personal opinions and speculations. It is also a message to my future self, so I remember why I invested in Monero in the first place!

I'm a developer and I am currently working (for unrelated reasons) on a banking application. This work lead me to search on cryptocurrencies and on how things have changed in the past years.

A big "HA!" moment occured to me when I learned how things now work in China!!! If you only have heard of WeChat, I highly suggest you do some research, look at some videos, etc. I'm from Canada and I had no clue what WeChat was. In short, everybody in China now pay using WeChat Pay. Some street merchants don't even accept cash anymore! WeChat Pay is a centralised digital currency, controlled by the China government (behind Tencent).

I'm absolutely sure this kind of easy payment/money exchange mecanism is coming to western countries soon. And Libra is exactly that: big companies trying to be in control of that first digital currency that is going to be used eveywhere in the west! Those companies will provide cheap terminals to anybody wanting one, to help adoption. They will fight Bitcoin and will make Libra easier to use for the mass.

<conspiracy theory>
I may be wrong about this one, but my opinion is that the gouvernment (at least the US gov) is secretly behind the Libra project. Probably big banks too... As they are already involved in Facebook in a way or another, I'm sure.

They want to present Libra as the creation of someone else (Facebook and various partners), as a project that they "will highly regulate", and they will probably really take some actions "agains Libra" to show they are not involved in the project.

But this will only be smoke and mirrors. Don't be fooled, they know something like WeChat Pay is coming. They are not stupid people, they know what is going on in China and India. And, above all, they want to be in control of this digital currency in the west...
</conspiracy theory>

In short, I do think that Libra will succeed. Call it a fake cryptocurrency or not, it will be irrelevent to regular people.

Of course it will take some time for people from the west to adapt to this new way of paying and exchanging money, but they eventually will, as Libra will be very, very convenient.

The difference between China and the west though, is that westerners care more about their privacy. Like, a lot more. Libra will be a gateway drug to real crypto currencies interest in the general population. People will learn that there are other ways to pay/exchange money as easily as with Libra, but without leaking information to big companies, with privacy in mind.

Those people will probably don't be interested by Bitcoin that much since Bitcoin will not offer them something significantly better than Libra. But they may certainly be interested in a solution that makes their money transactions private!

This is when Monero may really start shinning. My prediction is that Monero will eventually even overtake Bitcoin, and by far. Again, because :

1) Libra will be backed by huge organisations.
2) Bitcoin will not offer enough extra features to interest most consumers.
3) Monero will be a mature, tested, alternative providing real privacy.