Capture the Authorised Payment

After final confirmation by the customer you must call /start to mark the conclusion of contract:

POST /api/v2/Smart/Transactions/STX_HNYFD9RMK2NTEAG6HA4NUFR2Y0FVA2/start HTTP/1.1
Authorization: Bearer qb56tjj1bcvo9n2nj4u38k84lo
Accept: application/json

If everything is fine, the API responds with 200 OK, and the Smart Transaction has changed the status:

HTTP/1.1 200 OK
Content-Type: application/json
"object": "smart.transactions",
// ...
"updated": "2020-11-13T10:39:13+01:00",
"status": "ok",
// ...

The status of the Smart Transaction will be ok (intent sale), received (intent order and shipping), or collection (intent order and collection).

In the background, the PayPal Order or Subscription is started too.