private void configureSsl(NettyServerBuilder builder) throws NoSuchAlgorithmException, CertificateEncodingException, NoSuchProviderException, InvalidKeyException, SignatureException, SSLException { NativeLibraryLoader.loadFirstAvailable(ClassLoader.getSystemClassLoader(), "netty_tcnative_osx_x86_64", "netty_tcnative_linux_x86_64", "netty_tcnative_windows_x86_64" ); ECKeyPair ecKeyPair = ethereumConfig.getMainCredentials().getEcKeyPair(); KeyPair keyPair = CryptoUtil.decodeKeyPair(ecKeyPair); SslContextBuilder contextBuilder = SslContextBuilder.forServer( keyPair.getPrivate(), CryptoUtil.genCert(keyPair) ); builder.sslContext(GrpcSslContexts.configure(contextBuilder).build()); }