algorand-qrcode
v3.1.9
Published
Algorand QR Code generator module in JS
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Readme
Algorand QR Code Generator V3.1.8
New version 3 is a complete re-write of the Algorand QRCode generation tool. Simpler and more effective!
Breaking changes: The way to import and some of options have changed , please consult this readme.
Demo
Live Demo
Links
Algorand Developers Portal Publication
Algorand Dev Hours Presentation
Algorand Dev Hours Presentation Video on YouTube
News
Version 3.0.0 is out!
Now completely supports any modern web framework
Modern JS Module in both Node and Browser
Technical notes
Amount is in MicroAlgos
Algorand URI reference specification: Algorand payment prompts specification.
Requires NodeJS version later than 10.
Table of contents
- Highlights
- Algorand URI's ABNF Grammar
- Installation
- Usage
- Error correction level
- API
- Mentioned Trademarks
- Credits
- License
Highlights
- Supports NodeJS and Browser.
- Supports RFC 3986 and Algorand URI ABNF Grammar.
- CLI utility.
- Save QR code as valid SVG image or text
Algorand URI ABNF Grammar
algorandurn = "algorand://" algorandaddress [ "?" algorandparams ]
algorandaddress = *base32
algorandparams = algorandparam [ "&" algorandparams ]
algorandparam = [ amountparam / labelparam / noteparam / assetparam ]
amountparam = "amount=" *digit
labelparam = "label=" *qchar
assetparam = "asset=" *digit
note = "note=" *qcharInstallation and use
npm install --save algorand-qrcodeand then
import algoqrcode from "algorand-qrcode/lib/bundle.min.js"or, install it globally to use qrcode cli command to generate Algorand URI qrcode images in your terminal.
npm install -g algorand-qrcodeand then
algoqrcode [options]Usage
Browser and Frameworks (react...) use
import algoqrcode from "algorand-qrcode/lib/bundle.min.js";
const MyQrCodeComponent = (props)=>{
let qrcode = algoqrcode({wallet:props.wallet, label:props.label})
let scg = qrcode.svg()
return svg
}
CLI
Usage: qrcode [options]
Algorand options:
-m, --amount Amount (in Micro Algos) of Algorand transaction [number]
-w, --wallet Destination Wallet address (Algorand account address) [string]
-l, --label Label of Algorand transaction [string]
-a, --asset Algorand asset id (in case of Algorand ASA transfer) [string]
-n, --note note [string]
QR Code options:
-e, --ecl Error correction level [choices: "L", "M", "Q", "H"]
Renderer options:
-o, --output Output type [choices: "file", "svg", "terminal"]
-w, --wallet Destination wallet [number]
-p, --padding Padding around QRcode [number]
-b, --background Light color [string]
-c, --color Dark color [string]
-s, --size QRcode image width and height (px) [number]
-f, --file Output file [string]
Options:
-h, --help Show help [boolean]
--version Show version number [boolean]
Examples:
- Send 1 Algo transaction:
node qrcode -w "AMESZ5UX7ZJL5M6GYEHXM63OMFCPOJ23UXCQ6CVTI2HVX6WUELYIY262WI" -m 1000000 -s 128 -n "This is an Algo payment transaction QR Code"
- Save Algorand contact label as svg image:
node qrcode -w "AMESZ5UX7ZJL5M6GYEHXM63OMFCPOJ23UXCQ6CVTI2HVX6WUELYIY262WI" -l "[email protected]" -o file -f sample.svg
NodeJS
Import the module algorand-qrcode for your NodeJS module
import algoqrcode from 'algorand-qrcode'
let qrcode = algoqrcode({
wallet: "AMESZ5UX7ZJL5M6GYEHXM63OMFCPOJ23UXCQ6CVTI2HVX6WUELYIY262WI",
label: "Test Label",
output: "svg",
size:256
})
let svg = qrcode.svg()
console.log(svg)Error correction level
Error correction capability allows to successfully scan a QR Code even if the symbol is dirty or damaged. Four levels are available to choose according to the operating environment.
Higher levels offer a better error resistance but reduce the symbol's capacity.
If the chances that the QR Code symbol may be corrupted are low (for example if it is showed through a monitor)
is possible to safely use a low error level such as Low or Medium.
Possible levels are shown below:
| Level | Error resistance | |------------------|:----------------:| | L (Low) | ~7% | | M (Medium) | ~15% | | Q (Quartile) | ~25% | | H (High) | ~30% |
The percentage indicates the maximum amount of damaged surface after which the symbol becomes unreadable.
Error level can be set through options.ecl property.
If not specified, the default value is M.
QR Code options
errorCorrectionLevel
Type: String
Default: M
Error correction level.
Possible values are low, medium, quartile, high or L, M, Q, H.
Algorand URI params
wallet
Type: String
Wallet address for Algorand transaction.
amount
Type: Number
Amount of Algorand transaction in MicroAlgos or Standard Asset Unit.
label
Type: String
Label of Algorand transaction.
asset
Type: String
Asset Id of Algorand transaction if used. If not specified , Algo will be used as fungible token.
note
Type: String
note field content of Algorand transaction.
Renderers options
ecl
Type: String
Default: M
Define the error correction level.
padding
Type: Number
Default: 5
Define how much wide the quiet zone should be.
size
Type: Number
Default: 128
Width and height.
color
Type: String
Default: #000000ff
Color of dark module. Value must be in hex format (RGBA).
Note: dark color should always be darker than color.light.
background
Type: String
Default: #ffffffff
Color of light module. Value must be in hex format (RGBA).
License
Credits
Special appreciations to Sheghzo.
The idea for this lib was inspired by: Algorand developers portal Article Payment Prompts with Algorand Mobile Wallet ,from Jason Paulos.