protected function get_transaction_args( $order ) {
		return array_merge(
			array(
				'cmd'           => '_cart',
				'business'      => $this->gateway->get_option( 'email' ),
				'no_note'       => 1,
				'currency_code' => get_woocommerce_currency(),
				'charset'       => 'utf-8',
				'rm'            => is_ssl() ? 2 : 1,
				'upload'        => 1,
				'return'        => esc_url_raw( add_query_arg( 'utm_nooverride', '1', $this->gateway->get_return_url( $order ) ) ),
				'cancel_return' => esc_url_raw( $order->get_cancel_order_url_raw() ),
				'page_style'    => $this->gateway->get_option( 'page_style' ),
				'image_url'     => esc_url_raw( $this->gateway->get_option( 'image_url' ) ),
				'paymentaction' => $this->gateway->get_option( 'paymentaction' ),
				'invoice'       => $this->limit_length( $this->gateway->get_option( 'invoice_prefix' ) . $order->get_order_number(), 127 ),
				'custom'        => wp_json_encode(
					array(
						'order_id'  => $order->get_id(),
						'order_key' => $order->get_order_key(),
					)
				),
				'notify_url'    => $this->limit_length( $this->notify_url, 255 ),
				'first_name'    => $this->limit_length( $order->get_billing_first_name(), 32 ),
				'last_name'     => $this->limit_length( $order->get_billing_last_name(), 64 ),
				'address1'      => $this->limit_length( $order->get_billing_address_1(), 100 ),
				'address2'      => $this->limit_length( $order->get_billing_address_2(), 100 ),
				'city'          => $this->limit_length( $order->get_billing_city(), 40 ),
				'state'         => $this->get_paypal_state( $order->get_billing_country(), $order->get_billing_state() ),
				'zip'           => $this->limit_length( wc_format_postcode( $order->get_billing_postcode(), $order->get_billing_country() ), 32 ),
				'country'       => $this->limit_length( $order->get_billing_country(), 2 ),
				'email'         => $this->limit_length( $order->get_billing_email() ),
			),
			$this->get_phone_number_args( $order ),
			$this->get_shipping_args( $order )
		);
	}