Using a create_preference() function within MP class.
[18-Apr-2013 15:39:33] create preference response: Array
(
[status] => 201
[response] => Array
(
[collector_id] => 131258484
[operation_type] => regular_payment
[items] => Array
(
[0] => Array
(
[id] =>
[title] => Prime Theme
[currency_id] => ARS
[picture_url] => http://prime.gbmu.dev/wp-content/themes/prime-theme-beta/img/logo.png
[description] => 1*Suggested Deal;
[quantity] => 1
[unit_price] => 29
)
)
[payer] => Array
(
[email] => localdevelopment@sproutventure.com
[name] => Daniel
[surname] => Cameron
)
[back_urls] => Array
(
[failure] =>
[error] => http://prime.gbmu.dev/checkout/
[pending] => http://prime.gbmu.dev/checkout/?mp_payment=1
[cancel] => http://prime.gbmu.dev/cart/
[success] => http://prime.gbmu.dev/checkout/?mp_payment=1
)
[payment_methods] => Array
(
[excluded_payment_methods] => Array
(
)
[excluded_payment_types] => Array
(
)
[installments] =>
)
[client_id] => 963
[marketplace] => NONE
[marketplace_fee] => 0
[external_reference] => 234
[additional_info] =>
[expires] =>
[expiration_date_from] =>
[expiration_date_to] =>
[date_created] => 2013-04-18T11:39:27.467-04:00
[id] => 131258484-de4bae20-c12a-4c25-9b11-f9135c1a4612
[init_point] => https://www.mercadopago.com/mla/checkout/pay?pref_id=131258484-de4bae20-c12a-4c25-9b11-f9135c1a4612
[sandbox_init_point] => https://sandbox.mercadopago.com/mla/checkout/pay?pref_id=131258484-de4bae20-c12a-4c25-9b11-f9135c1a4612
)
)
The [id] is saved internally as the "token" for GBS to reference later.
At this point there's only the payment preference that was returned in the first step to query the MP API to get the payment status.
I've used search_payment with the "token" (or payment preference 'id') and get_payment_info with the same "token".
For example: https://api.mercadolibre.com/sandbox/collections/search?site_id=MLA&id=131258484-de4bae20-c12a-4c25-9b11-f9135c1a4612&offset=0&limit=0&access_token=APP_USR-360806205579652-041811-3744932449b19329de645e3690bcc2d8__N_D__-131258484 Will return http://s-v.me/OOFK
get_payment_info uri example: https://api.mercadolibre.com/sandbox/collections/notifications/131258484-de4bae20-c12a-4c25-9b11-f9135c1a4612&access_token=APP_USR-360806205579652-041811-3744932449b19329de645e3690bcc2d8__N_D__-131258484 Will return http://s-v.me/OOaf