[Fórum WP] Validação fingerprint postback

readme.md

https://docs.pagar.me/v4/reference/validando-um-postback

functions.php

<?php

if( !class_exists( 'WCPagarmePixPayment\Pagarme\PagarmeApiV4' ) ){
	return;
}

use WCPagarmePixPayment\Pagarme\PagarmeApiV4;

class ArtiPagarmeApi extends PagarmeApiV4 {

	public function ipn_handler() {
		@ob_clean();

		$ipn_response = file_get_contents('php://input');

		if ($this->gateway->is_debug()) {
			$this->gateway->log->add($this->gateway->id, 'Retornou um POSTBACK');
			$this->gateway->log->add($this->gateway->id, 'Response' . print_r($ipn_response, true));
		}

		if ($ipn_response && $this->check_fingerprint($ipn_response)) {
			header('HTTP/1.1 200 OK');

			parse_str( $ipn_response, $parsed_ipn_response );
			wc_get_logger()->add( 'arti', print_r( $parsed_ipn_response, true ) );
			$this->process_successful_ipn($parsed_ipn_response);
			exit;
		} else {
			wp_die(esc_html__('Pagar.me PIX Request Failure', 'wc-pagarme-pix-payment'), '', array('response' => 401));
		}
	}

	public function check_fingerprint( $ipn_response ) {

		$signature = $_SERVER['HTTP_X_HUB_SIGNATURE'];

		$parts = explode('=', $signature, 2);

		if (count($parts) != 2) {
		    return false;
		}

		$api_key = $this->gateway->api_key;

		$hash = hash_hmac($parts[0], $ipn_response, $api_key);

		return $hash === $parts[1];

	}

}

add_filter( 'wc_payment_gateways_initialized', function( $wc_gateways ){

	foreach( $wc_gateways->payment_gateways as $gateway ){
		if( is_a( $gateway, 'WCPagarmePixPayment\Gateway\PagarmePixGateway' ) ){
			$gateway->api = new ArtiPagarmeApi( $gateway );
			break;
		}
	}

} );