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# gRPC Server

gRPC Server is a node extension that allows running gRPC (opens new window) services on a node. gRPC interaface can be used to run apps on your own node.

gRPC services provide information about:

# Client Generation

The clients generated (opens new window) from .proto files (opens new window) are used to connect to gRPC services.

Example of usage of gRPC client generated from .proto files: Retrieving blocks in C# (opens new window)

# gRPC Server Installation

The gRPC Server extension can be installed on the node by two methods: using DEB package or TGZ archive.

# Installation via DEB Package

  1. Download the latest version of the DEB package from the Releases (opens new window) page (Assets section).

    The extension package name is as follows:

    • for Mainnet grpc-server_{version number}_all.deb

    • for Testnet grpc-server-testnet_{version number}_all.deb

    • for Stagenet grpc-server-stagenet_{version number}_all.deb

  2. Install the package.

    Mainnet:

    sudo dpkg -i grpc-server_{version number}_all.deb

    Testnet:

    sudo dpkg -i grpc-server-testnet_{version number}_all.deb

    Stagenet:

    sudo dpkg -i grpc-server-stagenet_{version number}_all.deb

  3. Edit the node configuration file as described in the Node Configuration article. For Mainnet, the configuration file is located at /etc/waves/waves.conf, for Testnet at /etc/waves-testnet/waves.conf, for Stagenet at /etc/waves-stagenet/waves.conf.

    3.1. Add gRPC Server to the waves.extensions section:

    waves {
   ...
   extensions = [
      com.wavesplatform.events.GRPCServerExtension
   ]
}

    3.2. If you want to change the port for client connection (default is 6870), add the following setting:

    waves {
   ...
   grpc {
      port = 6877 # Specify port
}

  4. Restart the node.

    Mainnet:

    sudo systemctl restart waves

    Testnet:

    sudo systemctl restart waves-testnet

    Stagenet:

    sudo systemctl restart waves-testnet

# Installation via TGZ Archive

  1. Download the TGZ archive with the extension from the Releases (opens new window) page (Assets section) on Github.

    The TGZ archive name is as follows:

    • for Mainnet grpc-server-{version number}.tgz

    • for Testnet grpc-server-testnet-{version number}.tgz

    • for Stagenet grpc-server-stagenet-{version number}.tgz

  2. Unpack the archive to the directory containing node's JAR-file.

  3. Create a new configuration file or open the existing one, see the Node Configuration article.

    3.1. Add gRPC Server to the waves.extensions section:

    waves {
   ...
   extensions = [
      com.wavesplatform.events.GRPCServerExtension
   ]
}

    3.2. If you want to change the port for client connection (default is 6870), add the following setting:

    waves {
   ...
   grpc {
      port = 6877 # Specify port
}

  4. Run the command:

    Mainnet

    java -cp 'waves-all-{version number}.jar:grpc-server-{version number}/lib/*' com.wavesplatform.Application {configuration file name}.conf

    Testnet:

    java -cp 'waves-all-{version number}.jar:grpc-server-testnet-{version number}/lib/*' com.wavesplatform.Application {configuration file name}.conf

    Stagenet:

    java -cp 'waves-all-{version number}.jar:grpc-server-stagenet-{version number}/lib/*' com.wavesplatform.Application {configuration file name}.conf

    On Windows, use ; instead of :, for example:

    java -cp 'waves-all-{version number}.jar;grpc-server-{version number}/lib/*' com.wavesplatform.Application {configuration file name}.conf
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