Implementation
ffea3cd/app/code/Magento/Sales/Model/Order/Payment.php#L852-L880
/**
* Accept online a payment that is in review state
*
* @return $this
*/
public function accept()
{
$transactionId = $this->getLastTransId();
/** @var \Magento\Payment\Model\Method\AbstractMethod $method */
$method = $this->getMethodInstance();
$method->setStore($this->getOrder()->getStoreId());
if ($method->acceptPayment($this)) {
$invoice = $this->_getInvoiceForTransactionId($transactionId);
$message = $this->_appendTransactionToMessage(
$transactionId,
$this->prependMessage(__('Approved the payment online.'))
);
$this->updateBaseAmountPaidOnlineTotal($invoice);
$this->setOrderStateProcessing($message);
} else {
$message = $this->_appendTransactionToMessage(
$transactionId,
$this->prependMessage(__('There is no need to approve this payment.'))
);
$this->setOrderStatePaymentReview($message, $transactionId);
}
return $this;
}
Details: How is \Magento\Sales\Model\Order\Payment::setOrderStatePaymentReview() implemented and used?
The single usage
\Magento\Sales\Controller\Adminhtml\Order\ReviewPayment::execute()
Details: How does \Magento\Sales\Controller\Adminhtml\Order\ReviewPayment::execute() work?