Determines if credit card is valid using the Luhn formula. https://gist.github.com/ShirtlessKirk/2134376

Parameters:

• cardNumber String | Number

Returns:

https://davidwalsh.name/validate-credit-cards

Parameters:

• cardNumber String | Number

Returns:

Encode a credit card number as a string and encode all digits except the last digitsShown.

Parameters:

• strNumber String

  The credit card number as string.

• [digitsShown=4] Number optional

  Display this many digits at the end of the card number for security purposes.

• [encodeChar=*] String optional

  Optional encoding character to use instead of default '*'.

Returns:

Example:

 MerchantUtil.encodeCreditCardNumber('4556106734384949');
 // ************4949
 MerchantUtil.encodeCreditCardNumber('4556106734384949', 5, 'x');
 // xxxxxxxxxxx84949

Returns a credit card provider name from the credit card number passed in.

Parameters:

• cardNumber String | Number

Returns:

Example:

 MerchantUtil.getCreditCardProvider("4");
 MerchantUtil.getCreditCardProvider("4556106734384949");
 // visa
 MerchantUtil.getCreditCardProvider("5428070016026573");
 // mastercard

Determines if credit card is valid

Parameters:

• cardNumber String | Number

  The credit card number.

Returns:

Example:

 MerchantUtil.isCreditCard('4556106734384949');
 // true

Validate a credit card's expiration date.

Parameters:

• month Number
• year Number

Returns:

Example:

 MerchantUtil.isValidExDate(11, 2010);
 // false