man Vend::Payment::PayflowPro (3): Interchange support for PayPal Payflow Pro HTTPS POST

SYNOPSIS

&charge=payflowpro
or
[charge mode=payflowpro param1=value1 param2=value2]

PREREQUISITES

    The following Perl modules:
       LWP
       Crypt::SSLeay
       HTTP::Request
       HTTP::Headers
    OpenSSL

PayPal's Payflow Pro HTTPS POST does NOT require the proprietary binary-only shared library that was used for the Verisign Payflow Pro service.

DESCRIPTION

The Vend::Payment::PayflowPro module implements the payflowpro() payment routine for use with Interchange. It is compatible on a call level with the other Interchange payment modules --- in theory (and even usually in practice) you could switch from a different payment module to PayflowPro with a few configuration file changes.

To enable this module, place this directive in interchange.cfg:

    Require module Vend::Payment::PayflowPro

This must be in interchange.cfg or a file included from it.

NOTE: Make sure CreditCardAuto is off (default in Interchange demos).

The mode can be named anything, but the "gateway" parameter must be set to "payflowpro". To make it the default payment gateway for all credit card transactions in a specific catalog, you can set in catalog.cfg:

    Variable  MV_PAYMENT_MODE  payflowpro

It uses several of the standard settings from Interchange payment. Any time we speak of a setting, it is obtained either first from the tag/call options, then from an Interchange order Route named for the mode, then finally a default global payment variable. For example, the "id" parameter would be specified by:

    [charge mode=payflowpro id=YourPayflowProID]

    Route payflowpro id YourPayflowProID

or with only Payflow Pro as a payment provider

    Variable MV_PAYMENT_ID YourPayflowProID

The active settings are:

id

Your account ID, supplied by PayPal when you sign up. Global parameter is MV_PAYMENT_ID.

secret

Your account password, selected by you or provided by PayPal when you sign up. Global parameter is MV_PAYMENT_SECRET.

partner

Your account partner, selected by you or provided by PayPal when you sign up. Global parameter is MV_PAYMENT_PARTNER.

vendor

Your account vendor, selected by you or provided by PayPal when you sign up. Global parameter is MV_PAYMENT_VENDOR.

transaction

The type of transaction to be run. Valid values are:

    Interchange         Payflow Pro
    ----------------    -----------------
    sale                S
    auth                A
    credit              C
    void                V
    settle              D (from previous A trans)

Default is "auth".

The following should rarely be used, as the supplied defaults are usually correct.

remap

This remaps the form variable names to the ones needed by PayPal. See the "Payment Settings" heading in the Interchange documentation for use.

host

The payment gateway host to use, to override the default.

check_sub

Name of a Sub or GlobalSub to be called after the result hash has been received from PayPal. A reference to the modifiable result hash is passed into the subroutine, and it should return true (in the Perl truth sense) if its checks were successful, or false if not. The transaction type is passed in as a second arg, if needed.

This can come in handy since, strangely, PayPal has no option to decline a charge when AVS or CSC data come back negative.

If you want to fail based on a bad AVS check, make sure you're only doing an auth --- not a sale, or your customers would get charged on orders that fail the AVS check and never get logged in your system!

Add the parameters like this:

    Route  payflowpro  check_sub  avs_check

This is a matching sample subroutine you could put in interchange.cfg:

    GlobalSub <<EOR
    sub avs_check {
        my ($result) = @_;
        my ($addr, $zip) = @{$result}{qw( AVSADDR AVSZIP )};
        return 1 if $addr eq 'Y' or $zip eq 'Y';
        return 1 if $addr eq 'X' and $zip eq 'X';
        return 1 if $addr !~ /\S/ and $zip !~ /\S/;
        $result->{RESULT} = 112;
        $result->{RESPMSG} = "The billing address you entered does not match the cardholder's billing address";
        return 0;
    }
    EOR

That would work equally well as a Sub in catalog.cfg. It will succeed if either the address or zip is 'Y', or if both are unknown. If it fails, it sets the result code and error message in the result hash using PayPal's own (otherwise unused) 112 result code, meaning ``Failed AVS check''.

Of course you can use this sub to do any other post-processing you want as well.

Troubleshooting

Try the instructions above, then enable test mode. A test order should complete.

Then move to live mode and try a sale with the card number "4111 1111 1111 1111" and a valid future expiration date. The sale should be denied, and the reason should be in [data session payment_error].

If it doesn't work:

Make sure you ``Require''d the module in interchange.cfg:
```
    Require module Vend::Payment::PayflowPro
```
Check the error logs, both catalog and global.
Make sure you set your account ID and secret properly.

Try an order, then put this code in a page:

    <pre>
    [calcn]
        my $string = $Tag->uneval( { ref => $Session->{payment_result} });
        $string =~ s/{/{\n/;
        $string =~ s/,/,\n/g;
        return $string;
    [/calcn]
    </pre>

That should show what happened.

If all else fails, consultants are available to help with integration for a fee. You can find consultants by asking on the "[email protected]" mailing list.

NOTE

There is actually nothing in the package Vend::Payment::PayflowPro. It changes packages to Vend::Payment and places things there.

AUTHORS