authorizenet-accept.php

<?php
public static function instant_quote_minneapolis_authorizenet_after_submission() {
    add_action( 'gform_pre_submission', function( $form, $entry ) {
        if ( $form['id'] !== self::$gravity_forms['instant_quote_minneapolis']['form_id'] ) {
            return;
        }

        $fields = self::$gravity_forms['instant_quote_minneapolis']['fields'];

        $input_zip_code = 'input_' . $fields['zip_code'];
        $input_email = 'input_' . $fields['email'];
        $input_first_name = 'input_' . $fields['first_name'];
        $input_last_name = 'input_' . $fields['last_name'];
        $input_address = 'input_' . $fields['address'];
        $input_franchise_location = 'input_' . $fields['franchise_location'];
        $input_phone = 'input_' . $fields['phone'];
        $input_amount = 'input_' . $fields['amount'];

        $hosted_payment_return_options = array(
            'showReceipt' => true,
            'url' => get_the_permalink() . '?status=1',
            'urlText' => 'Continue',
            'cancelUrl' => get_the_permalink() . '?status=0',
            'cancelUrlText' => 'Cancel',
        );

        $authorizenet_object = array(
            'getHostedPaymentPageRequest' => array(
                'merchantAuthentication' => array(
                    'name' => 'xxxxxxxxxxxxxx',
                    'transactionKey' => 'xxxxxxxxxxxxxxxxxxxxx',
                ),
                'transactionRequest' => array(
                    'transactionType' => 'authOnlyTransaction',
                    'amount' => $_POST[$input_amount],
                    'profile' => array(
                        'customerProfileId' => '123456789',
                    ),
                    'customer' => array(
                        'email' => $_POST[$input_email],
                    ),
                    'billTo' => array(
                        'firstName' => $_POST[$input_first_name],
                        'lastName' => $_POST[$input_last_name],
                        'company' => 'Maid Brigade',
                        'address' => $_POST[$input_address],
                        'city' => $_POST[$input_franchise_location],
                        'state' => 'MN',
                        'zip' => $_POST[$input_zip_code],
                        'country' => 'USA',
                        'phoneNumber' => $_POST[$phone],
                    ),
                ),
                'hostedPaymentSettings' => array(
                    'setting' => array(
                        0 => array(
                            'settingName' => 'hostedPaymentReturnOptions',
                            'settingValue' => json_encode( $hosted_payment_return_options ),
                        ),
                        1 => array(
                            'settingName' => 'hostedPaymentButtonOptions',
                            'settingValue' => json_encode( array(
                                'text' => 'Pay',
                                ) ),
                        ),
                        2 => array(
                            'settingName' => 'hostedPaymentStyleOptions',
                            'settingValue' => json_encode( array(
                                'bgColor' => 'blue',
                            ) ),
                        ),
                        3 => array(
                            'settingName' => 'hostedPaymentPaymentOptions',
                            'settingValue' => json_encode( array(
                                'cardCodeRequired' => false,
                                'showCreditCard' => true,
                                'showBankAccount' => false,
                                ) ),
                        ),
                        4 => array(
                            'settingName' => 'hostedPaymentSecurityOptions',
                            'settingValue' => json_encode( array(
                                'captcha' => false,
                                ) ),
                        ),
                        5 => array(
                            'settingName' => 'hostedPaymentShippingAddressOptions',
                            'settingValue' => json_encode( array(
                                'show' => true,
                                'required' => false,
                            ) ),
                        ),
                        6 => array(
                            'settingName' => 'hostedPaymentBillingAddressOptions',
                            'settingValue' => json_encode( array(
                                'show' => true,
                                'required' => false,
                            ) ),
                        ),
                        7 => array(
                            'settingName' => 'hostedPaymentCustomerOptions',
                            'settingValue' => json_encode( array(
                                'showEmail' => false,
                                'requiredEmail' => false,
                                'addPaymentProfile' => true,
                            ) ),
                        ),
                        8 => array(
                            'settingName' => 'hostedPaymentOrderOptions',
                            'settingValue' => json_encode( array(
                                'show' => true,
                                'merchantName' => 'Maid Brigade.',
                            ) ),
                        ),
                        9 => array(
                            'settingName' => 'hostedPaymentIFrameCommunicatorUrl',
                            'settingValue' => json_encode( array(
                                'url' => 'https://mysite.com/iFrameCommunicator.html',
                            ) ),
                        ),
                    ),
                ),
            ),
        );

        $endpoint = 'https://api.authorize.net/xml/v1/request.api';
        $arguments = array(
            'body'        => json_encode( $authorizenet_object ),
            'headers'     => array(
                'Content-Type' => 'application/json',
            )
        );

        $response = wp_remote_post( $endpoint, $arguments );

        if ( ! is_wp_error( $response ) ) {

            $body = json_decode( $body, true );
            $token = $body['token'];

            if ( $token ) { // The reponse is correct and I recieve the correct token
                $token_response = wp_remote_post( 
                    'https://accept.authorize.net/payment/payment',
                    array(
                        'body' => json_encode( array(
                            'token' => $token
                        ) ),
                        'headers' => array(
                            'Content-Type' => 'application/json',
                        ),
                    )
                );

                // How do I then redirect with the token?
                if ( ! is_wp_error( $token_response ) ) {
                    header( 'Location: https://accept.authorize.net/payment/payment' ); // I get Missing or invalid token.
                    var_dump($token_response); // The status is ok and 200 when I check 
                }
            }
        } else {
            $error_message = $response->get_error_message();
            throw new Exception( $error_message );
        }

    }, 10, 4 );
}