You don't need a mobile device to make lightning payments

[hadveach]

I do not want to piss on the parade here, but is the whole idea of the Lightning Network not to have a 100% digital <Lightning Fast> payment network? we will go backwards, if we start the physical printing of "money" again.  

The whole idea of Bitcoin, was to replace the old way of physically printing money <Fiat currencies> and now people want to go back to that again? Nope, I think you must go back to the drawing board with your idea and eliminate the "printing" idea.  

exactly my thoughts. why would you want to use bitcoin if you want to carry around a "piece of paper", just use cash, it is more convenient that way and it is accepted everywhere.

even if you wanted to use bitcoin then why use lightning network? why not simply use bitcoin with on-chain transactions? you can print private keys each containing a certain amount of bitcoin in them (10k, 50k,...) and go around giving them as money and if there is "change" you can also print an "address" on the same paper which they can send the change back to.

It gets even better. OP's giving an example where he has a specific amount to spend. Like he knows that there are things worth $10, $5, $1 at the store and he takes all of these in the form of qr codes. But what if you're going to a mall, ready to spend a few hundred USD. Are you going to print 3x 100, 5x 50, 10x10 and then juggle these bills around while the clerk scans? This would have to be the slowest and most annoying way to pay at a store. Only a true nerd would choose it.

Yes, I agree with you, we need innovation that is faster and simpler. it's slow and boring, so I think people will choose fiat.

I think about crypto cards that store every digital currency, what do you think about it?

[1715017206]

1715017206

[1715017206]

1715017206

[1715017206]

1715017206

[1715017206]

1715017206

[1715017206]

1715017206

[franky1]

It gets even better. OP's giving an example where he has a specific amount to spend. Like he knows that there are things worth $10, $5, $1 at the store and he takes all of these in the form of qr codes. But what if you're going to a mall, ready to spend a few hundred USD. Are you going to print 3x 100, 5x 50, 10x10 and then juggle these bills around while the clerk scans? This would have to be the slowest and most annoying way to pay at a store. Only a true nerd would choose it.

well the OP hasnt finalised his idea and its not standard to LN
so the OP can edit his idea wherby the URI he creates also includes a prompt. so like where my post joked about x12345 being part of the paper QR code.. could instead just have the bit before the ?= as the paper QR code.. which once standardised could then allow the OP to verbally tell the merchant to type in a password into the prompt

like "x12345"(switch kettle on) but instead "jamaica512" which the OP programmed his node that morning to allow a payment of upto $600 if jamaica password is received. whereby the 512 is the actual amount below $600 he wants to spend.

or like i said before. he can have it that when he says "x12334" it switches on his kitchen kettle at home

[DooMAD]

If PSBT (partially signed Bitcoin transactions) starts to see common usage and people get comfortable making "offline transactions", it's the type of idea we could revisit later.  At present, though, I'm not really seeing it.  We can test the waters when 0.17.0 is out and PSBT is (most likely) implemented.

[onelineproof]

It gets even better. OP's giving an example where he has a specific amount to spend. Like he knows that there are things worth $10, $5, $1 at the store and he takes all of these in the form of qr codes. But what if you're going to a mall, ready to spend a few hundred USD. Are you going to print 3x 100, 5x 50, 10x10 and then juggle these bills around while the clerk scans? This would have to be the slowest and most annoying way to pay at a store. Only a true nerd would choose it.

Like I said I open also to using a plastic (or other material) card that would work like a credit card with daily limits and approved merchants (identified with public keys). The paper bills would be a backup choice for untrusted merchants or when your phone battery dies, just a primitive way to pay without strings attached.

[Jyominall]

I think it's useless because everyone have a phone. And not many people want to make complicated everyday things

[9jaflick]

I would like to dispell the myth that you need a mobile device to pay at a store with lightning. I personally don't carry a phone or such device with me when I am outside.

I think it is quite simple actually.

1) Set up a lightning node at home
2) Print little paper bills with QR codes that act as one time auth keys for telling your node to send money with lightning. Print different denominations such as 10k satoshi, 50k satoshi, 100k satoshi
3) At the store, whatever the price, you give the paper bills and they scan them, and (as long as they have a computer with an internet connection) then your node sends the right amount. The denomination of the bill would specify the maximum that your node would send for the auth key. So if you have to pay the store cashier 152k satoshi, then you would give a 100k bill, a 50k bill, and a 10k bill. Yes they may steal 8k satoshi from the extra amount allowed by your 10k bill, but that's worth like 50 cents now, so it's a small risk, and you can use smaller denominations if you wish.

This type of setup would need a standard protocol that nodes use and cashiers would have on their computers, so would be worth starting on this if someone wants.

Edit: You can also use plastic/cardboard cards with a fixed code that has a daily limit and you can set "approved merchants" that are identified by public keys, and each merchant can have a unique daily limit.

your method is cool, but it's am using, because the method is limited only to those that are technically oriented in terms of utilizing blockchain/lightning network.

[maloibtc]

I think it is the great way to make payments today because all of them are safe and secure. the digital method of making payments with the help of crypto is the best one and I think that btc is the leader

[darkangel11]

It gets even better. OP's giving an example where he has a specific amount to spend. Like he knows that there are things worth $10, $5, $1 at the store and he takes all of these in the form of qr codes. But what if you're going to a mall, ready to spend a few hundred USD. Are you going to print 3x 100, 5x 50, 10x10 and then juggle these bills around while the clerk scans? This would have to be the slowest and most annoying way to pay at a store. Only a true nerd would choose it.

Like I said I open also to using a plastic (or other material) card that would work like a credit card with daily limits and approved merchants (identified with public keys). The paper bills would be a backup choice for untrusted merchants or when your phone battery dies, just a primitive way to pay without strings attached.

If you managed to make it work, or make it work the way franky1 described it, it would be a very nice backup. I thought you wanted to use the paper qr codes as the main way of payment as a substitute for phone and card, but that would be too much of a hassle both to you and the store clerk. A substitute for paper money when you're going full crypto and want to be able to pay even if you lose phone connection? Sure, why not?

[onelineproof]

I think phone is a hassle. You have to pull it out of the case, put the password, open the menu, go to the lightning app, scan some qr code, click pay... hopefully your battery is fine and you have signal. People already pay with cards these days. You can just give the cashier a card, they scan it, and it's done. You don't have to run a node at home if you don't want to, you can use a 3rd party service. It's not like full nodes are running on mobile phones anyway. I think all 3 methods should be supported and standardized at Point-of-Sale locations (phone, card, paper bills), and let people choose. The way I see it is Bitcoin: Be your own bank, Lightning: Be your own credit card company.

[marcus00]

The vulnerability in your software can lead to your entire wallet being exhausted. It may take several minutes, and in some cases the trader may not be able to afford to wait too long. In general, I do not see such a system being extensively adopted, although maybe something like that would be used if both sides would need it for some reason. The lightning network has made things cheaper and much easier when Bitcoin transactions and payments are involved.

[BigSamson5]

The lightning network has made things cheaper and much easier when Bitcoin transactions and payments are involved. If PSBT starts to see widespread use and people are comfortable making "offline deals," that's kind of an idea that we can revisit later. We can test the waters when 0.17.0 is given and PSBT is done and not many people want to do daily things complicated. The digital method of making payments with the help of encryption is the best and I think btc is the leading

[faceoff97]

I do not want to piss on the parade here, but is the whole idea of the Lightning Network not to have a 100% digital <Lightning Fast> payment network? we will go backwards, if we start the physical printing of "money" again. 

The whole idea of Bitcoin, was to replace the old way of physically printing money <Fiat currencies> and now people want to go back to that again? Nope, I think you must go back to the drawing board with your idea and eliminate the "printing" idea.   

This says it all! We are heading  to a cashless society and then why is that we have to print qr code again?  Another thing is that, mobile app would be the future of the market, and payment will totally go with it. Having mobile is more than enough, I don't see the need for anything that will complicate thing, after all most of us are having mobile phone. Check this open source wallet and see for your self great featurea a mobile app wallet can offer: https://hodler.tech/?lang=en That is an open source wallet which offers great feature which allows people to make payment is the most simplest way with great security features.