payment-card-utils-go

Small utility library for validating and formatting payment card numbers.
This library supports

• Masking PANs
• Validating PANs
• Getting Schemes from Bin Range
• Generating Random PANs

Usage

go get github.com/mickstar/payment-card-utils-go v0.2.0

Masking pans

pan := "4111111111111111"
maskedPan := CardUtils.MaskPan(pan)
fmt.Println(maskedPan) // 411111******1111
fmt.Println(CardUtils.MaskPanWithCharacter(pan, 'X')) // 411111XXXXXX1111

Validating pans

pan := "4111111111111111"
// useful if you just want a Luhn Check
fmt.Println(CardUtils.LuhnCheck(pan)) // true
// this also verifies card length
fmt.Println(CardUtils.ValidityCheck(pan)) // true

Getting Scheme

    pan := "4111111111111111"
    fmt.Println(CardUtils.GetScheme(pan)) // VISA

    switch CardUtils.GetScheme(pan) {
    case Scheme.VISA:
        fmt.Println("Visa")
    case Scheme.MasterCard:
        fmt.Println("Mastercard")
    // etc
    default:
        fmt.Println("something else.")
    }

Generating Random PANs

    fmt.Println(CardUtils.GenerateRandomPan() // 1274574654654654
    fmt.Println(CardUtils.GenerateRandomPanWithScheme(Scheme.MasterCard)) // 5123456789012345
    fmt.Println(CardUtils.GenerateRandomPanWithScheme(Scheme.Visa)) // 4123456789012345

These Pans are guarenteed to match the bin range and pass the Luhn Check.

Author

Michael Johnston [email protected]

Licence

Released under MIT