So I was looking at adding credit card payments to some site I'm building. Mollie.com seems like a nice platform but after checking out Business::MollieAPI (albeit really quickly) I decided not to go there and use a straight approach. The code below can run as a CGI script (add some CGI.pm magic) and uses a test key to issue a token, simulate a payment and confirm the payment. It's relatively straightforward if you look at the API documentation they offer on-line. Step 1: send an amount and description to the API, together with a redirect URL (on success and failure) and receive a token to confirm payment. Step 2: Pay. The returned URL will load a payment page at Mollie.com and will redirect to your chosen page. Store the ID prior to paying since you will need it to confirm the payment. Step 3: Confirm the payment status.

#!/usr/bin/perl

use LWP::UserAgent;
use HTTP::Request;
use JSON::XS qw(decode_json encode_json);
use Data::Dumper;
use strict;

my $key = "test_GETYOURTESTKEYONTHEWEBSITE";

sub confirm
# Argument: Mollie Transaction
{ my $transaction = shift @_; # Mollie will generate unique transactio
+n ID prior to payment
  my $req = HTTP::Request->new('GET'=>"https://api.mollie.nl/v1/paymen
+ts/$transaction");
  $req->header('Authorization', 'Bearer ' . $key);
  my $ua = LWP::UserAgent->new();
  my $res = $ua->request($req);
  if ($res->is_success)
  { my $data = decode_json($res->decoded_content);
    return $data->{'status'}; # 'paid' for OK, 'cancelled' for cancell
+ed.
  } else
  { die Dumper $res; # Something else is going on
  }
}

sub pay
# Arguments: Amount & Description
{ my $amount = shift;
  my $description = shift;
  my $req = HTTP::Request->new('POST'=>'https://api.mollie.nl/v1/payme
+nts');
  $req->header('Authorization', 'Bearer ' . $key);
  $req->content_type('application/json');
  my %payment = ("amount"=>$amount,"description"=>$description,"redire
+ctUrl"=>"http://www.somesite.com/cgi-bin/somescript.cgi"); # Trigger 
+confirmation here
  my $json = encode_json(\%payment);
  $req->content(encode_json(\%payment));

  my $ua = LWP::UserAgent->new();
  my $res = $ua->request($req);
  if ($res->is_success)
  { my $data = decode_json($res->decoded_content);
    my $url = $data->{'links'}{'paymentUrl'}; # On-line payment proces
+s
    my $paymentid = $data->{'id'};
    return $paymentid, $url;
  } else
  { die Dumper $res; # Something else is going on
  }
} 

my ($id, $url) = &pay(100,"Lego Star Wars");
# Load URL and pay the money!
my ($status) = &confirm($id); # Unique and temporary ID for transactio
+n
if ($status eq "paid")
{ print "RRRAARRWHHGWWR"; } # Walking Carpet Joke
else
{ print "These are not the droids you're looking for!"; }
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