camp2023-57130-eng-Online_selling_without_internet_connection_opus.srt

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 [MUSIC]

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 So now we have Sebastian, welcome.

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 Sebastian is telling us about online selling without internet connection.

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 >> Thank you.

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 Hello, how many of you?

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 >> [INAUDIBLE]

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 >> Now, yes.

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 How many of you use payment system, additional payment system?

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 Raise your hand.

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 How many of you like free software?

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 How many of you know the software that the payment system is running?

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 Okay, nobody.

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 So how many of you know Nutaler already?

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 Okay, couple of hands.

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 So this is not about talking about Nutaler, you must already know it.

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 But this is an update of what we are working on.

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 So we are working on local currency lastly.

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 This is how it works.

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 So from the wallet, you first follow the one who doesn't have a use yet, Nutaler.

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 You first withdraw the coins, you spend it, you get the ticket from the merchant,

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 you spend it in the merchant with coins that are like the signature.

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 So you cannot link the withdrawal from the payment, so no one can trace you.

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 What are you buying?

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 And then the merchant make the deposit and

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 get the cash back from the merchant bank account, right?

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 So this is, I already know.

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 But we were thinking about if a merchant is going to be,

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 like for example here, selling stuff and doesn't have internet connection.

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 How do you trust that the wallet did the payment if you cannot check online?

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 So we found a solution, basically without too much saying.

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 We are using a TOTP,

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 code generator that the merchant has with a shared key with a merchant device.

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 So in the point of sales, you can check that the wallet's

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 transaction has codes that are valid for the purchase.

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 So when the wallet pays, you get information for the merchant back office, right?

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 And it has some verification code that can be validated with the merchant point of

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 sale.

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 So as you can see here, the point of sales talks with the buyer,

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 set the amounts, and it creates a contract that is going to be paid and

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 generates the key that will generate the code that is going to be transferred to

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 the point of sale.

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 If the point of sales validate that the code is the correct one,

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 it checks that the purchase is real.

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 So you can do that without the point of sale being online with the merchant.

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 So this is an example creating a QR code.

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 The merchant can create a QR code that is going to be put in the point of sales.

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 You set the description, the summary, and a fixed price.

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 And then this is what can be printed in the point of sales.

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 So you can scan it when you roll it and pay it.

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 >> [LAUGH]

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 >> When you pay it with the wallet,

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 you're going to see the confirmation of the transaction with these codes.

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 And these codes is what you can tell to the merchant to say, I made a purchase.

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 This is my code, okay, and the merchant can verify that because there is

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 an OTP validator in the merchant device.

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 So there is no demo because there's too much thing happening right now.

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 And we are going to be implementing this feature in the batch.

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 And I think the SoCo village is running a merchant and

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 title exchange and we are trying to implement that so it can be tested.

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 We also will be in the house of tea.

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 Every day at 3 PM we are going to be there just for talking about Tyler.

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 And also maybe a workshop to set up local currencies.

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 That's it.

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 There is a lot of help wanted, testing, translations,

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 also testing the deployments.

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 That's it.

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 Thank you.

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 >> [APPLAUSE]

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 [MUSIC]