すべての記事

QR codes in Trezor Suite

A QR code, or Quick Response code, is a two-dimensional machine-readable barcode that can be used to represent an address (and possibly additional transaction information). The use of a QR code makes it easy to scan an address, rather than having to type or copy it.

この記事の内容：

Using QR code addresses in Trezor Suite

Trezor Suite shows receiving wallet addresses as QR codes, so they can be easily scanned from a mobile device or using another camera:

In the account Receive tab, click on Show full address:

Show_Full_Address-HL.png

Trezor Suite will display the full BTC receiving address as both an alphanumeric string and as a QR code:

Confirm_Address.png

After carefully checking the address in Trezor Suite and on your Trezor hardware wallet, you must confirm the BTC receiving address using your Trezor device.

As well as displaying the QR code in Trezor Suite, you can also use the on-device menu to display the QR code directly on your Trezor's Trusted Display.

After confirming the address on your Trezor, use the "Copy" button in Trezor Suite to eliminate errors when sharing it:

Copy_Address-HL.png

When sending funds in Trezor Suite, you may scan (if given access to your webcam) or upload an image of a QR code when specifying an address.

In the account Send tab, select the QR icon in the Address input field:

Address_QR-HL.png

Next, at the top of the Scan QR code window, select either Camera or Image to upload the QR code to Suite:

Suite_QR_Image.png

Why use a QR code?

When using Bitcoin or other cryptocurrencies to pay at the point-of-sale or for a face-to-face transaction, there is the problem of how to communicate the receiving address in a way that the person paying can use. A Bitcoin address is between 27 and 34 characters long. This takes time to type manually, and it is easy to make a mistake.

On the other hand, a QR code can quickly and reliably represent this amount of data in a machine-readable manner. The QR code can (potentially) contain other information as well, such as an amount and a message.

With a mobile phone, a convenient way to pass that data is for the payment recipient (e.g., a merchant) to display a QR code with the Bitcoin address for the transaction, and then for the person paying to scan that code to obtain the address.

It is also possible to print out the QR code containing the user's receiving address and hand it to the sender, who can use it for repeated or regular payments.

How does a QR code work?

As mentioned above, a QR code is a two-dimensional barcode that contains machine-readable information in a convenient manner. It was first designed in 1994 for the automotive industry in Japan and has since expanded to a wide range of applications. Where a traditional barcode presents a string of information as a one-dimensional line of black and white bars, a two-dimensional barcode packs significantly more information into a grid of black and white squares. It contains the following information:

  • Quiet zone: The empty white border is making it possible to identify the code among other printed information.
  • Finder patterns: Larger black and white squares in three of the corners. They differentiate QR codes from other types of barcodes and make the orientation of the code clear.
  • Alignment pattern: Ensures the code can be deciphered even if the code is distorted.
  • Timing pattern: Makes it easy to identify the individual data cells within a QR code and is especially useful when the code is damaged or distorted.
  • Version information: Identifies the specific standard of the QR code. Data cells: Contain some of the actual data in the code.
;