Libreria does not recognize the following BIN: 67999989

[anthonybastidas49]

Library does not recognize the following BIN 67999989, at the moment the error is obtained: Unknown credit card method

[4k1k0]

func isMaestro(c *Card, ccDigits digits) bool {
	return matchesValue(ccDigits.At(4), []int{5018, 5020, 5038, 5612, 5893, 6304, 6759, 6761, 6762, 6763, 6390}) ||
		c.Number[:3] == "0604"
}

This example uses the card validator library from npm. And as we can see the card number 6799998900000200010 gets maestro as the card brand.

'use strict'
const valid = require("card-validator")

const numberValidation = valid.number("6799998900000200010")

if (!numberValidation.isPotentiallyValid) {
  console.error("error")
}

if (numberValidation.card) {
  console.log(numberValidation.card.type) // 'maestro'
}

card-validator uses credit-card-type to validate the card brands. And as we can see in src/lib/card-types.ts line 104

  maestro: {
    niceType: "Maestro",
    type: "maestro",
    patterns: [
      493698,
      [500000, 504174],
      [504176, 506698],
      [506779, 508999],
      [56, 59],
      63,
      67,
      6,
    ],
    gaps: [4, 8, 12],
    lengths: [12, 13, 14, 15, 16, 17, 18, 19],
    code: {
      name: "CVC",
      size: 3,
    },
  } as BuiltInCreditCardType,

Maestro uses more numbers as a pattern to check the brand.

    patterns: [
      493698,
      [500000, 504174],
      [504176, 506698],
      [506779, 508999],
      [56, 59],
      63,
      67,
      6,
    ],

When in Go we only use these

5018, 5020, 5038, 5612, 5893, 6304, 6759, 6761, 6762, 6763, 6390 and 0604