emvqr

Javascript library to parse EMV QR codes. This project intend to help in your work with the EMV specification for digital payments.

How to Use

First install in your project.

npm install -S emvqr

Then, import the library

const emvqr = require('emvqr');

Obtain your emvqr string

This is out of the scope of this library. For example, you could use a QR scanner lib in your front end and send the result to your backend. Or if you need test your functionallity, just use a dummy string, like in our example.

const example = '00020101021229300012D156000000000510A93FO3230Q31280012D15600000001030812345678520441115802CN5914BEST TRANSPORT6007BEIJING64200002ZH0104最佳运输0202北京540523.7253031565502016233030412340603***0708A60086670902ME91320016A0112233449988770708123456786304A13A';

And finally, decode it!

const result = emvqr.decode(example);
cconsole.log(result);

Result:

{
  '29': {
    id: '29',
    name: 'Merchant Account Information',
    len: 30,
    data: { '00': [Object], '05': [Object] }
  },
  '31': {
    id: '31',
    name: 'Merchant Account Information',
    len: 28,
    data: { '00': [Object], '03': [Object] }
  },
  '52': {
    id: '52',
    name: 'Merchant Category Code',
    len: 4,
    data: '4111 (Local/Suburban Commuter Passenger Transportation – Railroads, Feries, Local Water Transportation.)'
  },
  '53': { id: '53', name: 'Transaction Currency', len: 3, data: '156 (CNY)' },
  '54': { id: '54', name: 'Transaction Amount', len: 5, data: '23.72' },
  '55': {
    id: '55',
    name: 'Tip or Convenience Indicator',
    len: 2,
    data: '01'
  },
  '58': { id: '58', name: 'Country Code', len: 2, data: 'CN (China)' },
  '59': { id: '59', name: 'Merchant Name', len: 14, data: 'BEST TRANSPORT' },
  '60': { id: '60', name: 'Merchant City', len: 7, data: 'BEIJING' },
  '62': {
    id: '62',
    name: 'Additional Data Field Template',
    len: 33,
    data: { '03': [Object], '06': [Object], '07': [Object], '09': [Object] }
  },
  '63': { id: '63', name: 'CRC', len: 4, data: 'A13A' },
  '64': {
    id: '64',
    name: 'Merchant Information— Language Template',
    len: 20,
    data: '0002ZH0104最佳运输0202北京'
  },
  '91': {
    id: '91',
    name: 'Unreserved Templates',
    len: 32,
    data: '0016A011223344998877070812345678'
  },
  '00': { id: '00', name: 'Payload Format Indicator', len: 2, data: '01' },
  '01': { id: '01', name: 'Point of Initiation Method', len: 2, data: '12' }
}

Contributors

• @gandol
• @dannielwhatever