Flex and Amazon Payments - apache-flex

Question

I am trying to get amazon payments working w/ my flex app, as shown here:
http://miti.pricope.com/2009/07/11/using-amazon-flexible-payment-system-with-flex/
I've done exactly as he says, I've downloaded the files & changed the access key & secret key. When I run it on localhost or my production server I get "Signature did not match"
What else do I need to get this to work? Is there something else I need that he forgot to include.?

Answer 1

Lets try next:
goto return.and find function validateQueryString() and change to this:
function validateQueryString()
{
echo "validing the query string now\n";
$querystring = $_SERVER['QUERY_STRING'];
echo $querystring."\n";
echo $_GET['signature'];
$obj = new Amazon_FPS_CBUIUtils(AWS_ACCESS_KEY_ID,AWS_SECRET_ACCESS_KEY);
//Original signature received in response from Amazon FPS should be specified.
$signatureMatched = $obj->validateQueryString($querystring,$_GET['signature']);
if ($signatureMatched) {
echo "signature matched \n";
$request = new Amazon_FPS_Model_PayRequest();
//set the proper senderToken here.
$request->setSenderTokenId($_GET['tokenID']);
$amount = new Amazon_FPS_Model_Amount();
$amount->setCurrencyCode("USD");
//set the transaction amount here;
$amount->setValue($_SESSION['transaction_amount']);
$request->setTransactionAmount($amount);
//set the unique caller reference here.
$request->setCallerReference($_GET['callerReference']);
$service = new Amazon_FPS_Client(AWS_ACCESS_KEY_ID,
AWS_SECRET_ACCESS_KEY);
invokePay($service, $request);
}
else
echo "Signature did not match \n";
}
and post output here please, including your Signature did not match
Thanks.