Funds not getting transferred between paypal sandbox accounts - paypal-sandbox

Question

I am trying to integrate ci-merchant with codeigniter by using paypal express driver. I followed the steps as given in the document. I am able to get my site redirected to paypal sandbox payment site where the Total cost and everything is available. But when I try paying using paypal sandbox account by logging in, it does not show me the paypal balance even though I have enough in my account. When I click pay now, It redirects me to the return url successfully with token and payer ID in the url. But no fund is getting transferred.Not sure where I am going wrong.
url : ../retSuccess?token=EC-01M80248BN787213M&PayerID=9WLBBV9LM6TPA
$this->load->model('mainmodel');
$this->mainmodel->orderDetails();
$query = $this->mainmodel->retrieveOrder();
foreach ($query as $row){
$transaction_id = $row['transaction_id'];
}
$this->load->library('merchant');
$this->merchant->load('paypal_express');
$settings = array(
'username' => 'merchant_api1.canada.com',
'password' => '1369782104',
'signature' =>'AmTaSH3lkRIYxxjxUjB.1zqxD0cRA1hfMGBX2dV9h4DkcYQcjGtqDaYa',
'test_mode' => true);
$this->merchant->initialize($settings);
$params = array(
'amount' => $this->input->post('price'),
'currency' => 'CAD',
'description'=> $this->input->post('model_no'),
'return_url' => base_url('payment/transaction/'.$transaction_id),
'cancel_url'=> base_url('payment/cancel'));
$response = $this->merchant->purchase($params);
}
public function transaction(){
$transaction_id = $this->uri->segment(3);
$this->load->model('mainmodel');
$query = $this->mainmodel->loadTransaction($transaction_id);
foreach ($query as $row){
$price = $row['price'];
$desc = $row['model_no'];
$trans_id = $row['transaction_id'];
}
$this->load->library('merchant');
$this->merchant->load('paypal_express');
$params = array(
'amount' => '21.3',
'currency' => 'CAD',
'description' => 'SP66');
$response = $this->merchant->purchase_return($params);
if ($response->success())
{
$data['gateway_reference'] = $response->reference();
$data['model_no'] = $this->session->userdata('model_no');
$data['category'] = $this->session->userdata('category');
$data['specs'] = $this->session->userdata('specs');
$data['quantity'] = $this->session->userdata('quantity');
$newData = array('status'=>'complete',
'reference'=>$data['gateway_reference']);
$this->db->where('transaction_id',$trans_id);
$this->db->update('transactions',$newData);
$this->load->view('templates/success',$data);
}else{
$data['message'] = $response->message();
//$this->db->where('transaction_id',$trans_id);
//$this->db->delete('transactions');
$this->load->view('templates/failure',$data);
}
}

Answer 1

If I understand you correctly, the sandbox account should have a buy and seller account. You need to check the seller account to see the purchase from the buyer account.
I don't think the problem is from CI Merchant.

Answer 2

Make sure that the CI Merchant is calling PayPal's DoExpressCheckout API. This is the last API call of the Express Checkout, and this is the API that actually completes the payment and transfers the money.

Answer 3

With ci-merchant you need to call purchase_return on your return page to complete the payment, it looks like you just put everything on the initial (pre-paypal) page which won't do anything.