Bitcoin Stack Exchange
Bitcoin Stack Exchange

Questions tagged [qrcode]

A kind of two-dimensional barcode that can be scanned by many smartphones. They can be used to encode URLs or Bitcoin addresses.

57 questions
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7 answers

What additional benefits can QR codes bring to Bitcoin applications beyond payment requests?

Anyone who has recently used one of the Bitcoin wallets on a mobile device (and some desktop clients) will have seen a Bitcoin QR code. Clearly, QR codes allow for a succinct method for transferring complex information in a reliable and…
Gary
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Lightning Invoice QR-Code minimum size/display resolution?

what would be the minimum screen size to display lightning invoices as a qr-code? For the Raspberry Pi Zero I found these displays: 128x128 pixel LCD display (1.44 inch) 200x200 pixel e-paper/e-Ink display (1.54 inch) 128x64 pixel OLED display…
Jon Doe
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How do you generate a QR code for a not so popular coin?

I'm running a the datacoin-qt client and was wondering how do you generate a QR code? This is relatively a new coin and I can generate an address, but I'm not sure where I can goto to generate a QR code for this.
Patoshi パトシ
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How can I securely create a QR code from a bitcoin address?

My Problem I am trying to generate a QR code for a public bitcoin address, preferably using command-line tools. The process poses a security risk because malicious software can generate a QR code that represents an address different than the one…
Adam Matan
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2 answers

How to test my Bitcoin QR code without giving my bank account

I set up a QR code on my website to receive Bitcoin payments. So now I need to test it. I thought that if I install a Coinbase app it would let me scan it with its QR code scanner to see how my QR code looks like, but after giving Coinbase my…
c00000fd
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Is BTCFrog bitcoin QR code generator hacked?

The following URL is self explanatory. It is trying to generate a QR code requesting 0.005BTC at the shown address http://www.btcfrog.com/qr/bitcoinPNG3.php?address=31oLAAQDmuRAGfkviHPDXFgV15To4idott&size=200&label=xx&message=yy&amount=.005 This…
Fakeer
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1 answer

Bitcoin QR code on a product sold in stores

How and which company do i turn to implement a QR code for bitcoin on a product sold within stores.
ModelBTC
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0
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1 answer

parameters for bitcoin QRCode

im reading up on this page ==> https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki I am currently trying to incorporate a message in the qr code but when i proceessed the qrcode it pulled the amount address and amount correctly. but the…
BTCDude
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2 answers

Possible to transfer BTC via QR code?

Is it possible to embed an amount of BTC in a QR code to transfer to whoever scans it? E.g. I create a QR code for .5 BTC from my wallet, send the QR code to someone (without knowing their BTC wallet address), they scan it using their wallet app and…
ljenkins
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Is it safe to show the QR code to his friends?

I was opening my Jaxx wallet this morning and some of my friend made a pun saying they would take a phoyo of tmy QR code to buy some tickets with it. I was therefore wondering if it was safe to show the QR code ? What does it stands for ? Here is an…
Revolucion for Monica
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If I scanned my QR Code once with my android phone from a paper wallet, but now it wont..Why

I can no longer scan QR code from my paper wallet that I purchased from kiosk atm machine. I was able to scan it once, now the paper wallet has smears, rubbed off sections, etc. The kiosk machine's paper type resembles that of the slick paper used…
Jenniffer Baskin
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