# Lux gRPC Now Serving: **Protocol Version 42** Protobuf files are hosted at [https://buf.build/luxfi/lux](https://buf.build/luxfi/lux) and can be used as dependencies in other projects. Protobuf linting and generation for this project is managed by [buf](https://github.com/bufbuild/buf). Please find installation instructions on [https://docs.buf.build/installation/](https://docs.buf.build/installation/). Any changes made to proto definition can be updated by running `protobuf_codegen.sh` located in the `scripts/` directory of Lux Node. `buf` Quickstart [https://buf.build/docs/cli/quickstart](https://buf.build/docs/cli/quickstart) ## Protocol Version Compatibility The protobuf definitions and generated code are versioned based on the [RPCChainVMProtocol](../version/version.go#L13) defined for the RPCChainVM. Many versions of a Lux client can use the same [RPCChainVMProtocol](../version/version.go#L13). But each Lux client and chain VM must use the same protocol version to be compatible. ## Publishing to Buf Schema Registry - Checkout appropriate tag in Lux Node `git checkout v1.10.1` - Change to proto/ directory `cd proto`. - Publish new tag to buf registry. `buf push -t v26` Note: Publishing requires auth to the luxfi org in buf https://buf.build/luxfi/repositories