Authorize Script for Pay with Amazon

authorize.php

<?php

// include Pay with Amazon SDK - available here: https://github.com/amzn/login-and-pay-with-amazon-sdk-php/

require('Client.php');

// set config values
$config = array('merchant_id' => '',
                'access_key'  => '',
                'secret_key'  => '',
                'client_id'   => '',
                'region'      => 'us',
                'sandbox'     => true );


$pwaClient = new \PayWithAmazon\Client($config);


// pass in the Amazon Order Reference Id, the dollar amount to authorize and Capture, and the PWA Client

authorize('S01-9639729-4675159',5.00, $pwaClient);


function authorize($amazonOrderReferenceId, $amount, $client) {

  // Authorize 
  $requestParameters = array();
  $requestParameters['amazon_order_reference_id'] = $amazonOrderReferenceId;
  // a cross-account unique id for this authorization call
  $requestParameters['authorization_reference_id'] = $amazonOrderReferenceId . "-" . substr(md5($amazonOrderReferenceId . microtime()),0,4);
  $requestParameters['authorization_amount'] = $amount;
  $requestParameters['currency_code'] = 'USD';
  $requestParameters['transaction_timeout'] = 0;
  $requestParameters['capture_now'] = true;
  //$requestParameters['seller_authorization_note'] = '{"SandboxSimulation": {"State":"Declined", "ReasonCode":"TransactionTimedOut"}}';

  $response = $client->authorize($requestParameters);
  debugCallOutput("authorize",$requestParameters,$response);

  $authJson = json_decode($response->toJson());

  $state = $authJson->AuthorizeResult->AuthorizationDetails->AuthorizationStatus->State;
  $reasonCode = $authJson->AuthorizeResult->AuthorizationDetails->AuthorizationStatus->ReasonCode;

  if($state == 'Closed' && $reasonCode == 'MaxCapturesProcessed') {
    print "Authorization Successful\n\n";
  } else if($state == 'Declined' && $reasonCode == 'InvalidPaymentMethod') {
    print "Authorization UNSUCCESSFUL - Contact customer and ask them to update their Credit Card at payments.amazon.com, then try again.\n\n";
  } else if($state == 'Declined' && ( $reasonCode == 'TransactionTimedOut' || $reasonCode == 'ProcessingFailure'  ) ) {
    print "Authorization UNSUCCESSFUL - Wait a few hours and try this authorization again.\n\n";
  } else if($state == 'Declined' && $reasonCode == 'AmazonRejected') {
    print "Transaction was rejected by Amazon. Please reach out to the customer and request alternate payment.\n\n";
  } else {
    print "Authorization was unsuccessful. Try again later. If this persists, reach out to the customer and request alternate payment.\n\n";
  }

}



function debugCallOutput ($operation,$request,$response) {
  print $operation . "\n\n";
  print "Input Values:\n".print_r($request,true)."\n\n";
  print "Response:\n" . $response->toJson() . "\n\n";
}