ssl_pinning.dart

static SecurityContext? securityContext;

// Loading Certificate from assets and attach it to the security context

static Future<void> loadCertificateForSSLPinning() async {
    final ByteData data =
        await rootBundle.load('assets/certificates/fakestoreapi.pem');
    SecurityContext secContext = SecurityContext(withTrustedRoots: false);
    secContext.setTrustedCertificatesBytes(data.buffer.asUint8List());
    securityContext = secContext;
  }

// Use the security context and attach it to the http client and then setting the rejection of bad certificates
// then assign this http client to the dio instance 

 Future.wait([loadCertificateForSSLPinning()]);
      HttpClient httpClient = HttpClient(context: securityContext);
      httpClient.badCertificateCallback =
          (X509Certificate cert, String host, int port) {
        return false;
      };
      (dio.httpClientAdapter as IOHttpClientAdapter).createHttpClient =
          () => httpClient;