ev-types

Proto-generated types for Ev-node.

Features

• grpc (enabled by default) - Includes gRPC client and server code
• transport - Enables tonic transport features

Usage

Default usage (with gRPC)

[dependencies]
ev-types = "0.0.1"

Types only (without gRPC)

If you only need the message types without gRPC client/server code:

[dependencies]
ev-types = { version = "0.0.1", default-features = false }

This is useful when:

• You only need to serialize/deserialize Ev-node messages
• You're using a different RPC framework
• You want to minimize dependencies
• You're building for environments where gRPC is not needed

How It Works

This crate generates two versions of the protobuf code:

1. evnode.v1.messages.rs - Contains only the message types (structs/enums) with no gRPC dependencies
2. evnode.v1.services.rs - Contains everything including gRPC client/server code

Both files are pre-generated and checked into the repository, so users don't need protoc installed or need to regenerate based on their feature selection.

Building

The crate uses pre-generated proto files that are checked into version control. This ensures that the crate can be built from crates.io without requiring access to the original .proto files.

cargo build

The build script will:

1. Check if pre-generated files exist (src/proto/evnode.v1.*.rs)
2. If they exist, use them (this is the default behavior)
3. If they don't exist, attempt to generate them from source proto files

Proto Generation

The generated code is committed to the repository. If you modify the proto files, you need to regenerate:

# Force regeneration by setting the environment variable
EV_TYPES_FORCE_PROTO_GEN=1 cargo build

# Or from the repository root (if a make target exists)
make rust-proto-gen

Important:

• The build process generates both evnode.v1.messages.rs and evnode.v1.services.rs
• Both files should be committed to ensure users can use the crate without needing to regenerate
• When publishing to crates.io, the pre-generated files are included in the package
• Users installing from crates.io will use the pre-generated files automatically

Version Consistency

Important: The CI uses protoc version 25.1. If your local protoc version differs, you may see formatting differences in the generated files.

To check your protoc version:

protoc --version

To ensure consistency with CI:

1. Install protoc version 25.1
2. Use the provided script: ./client/scripts/generate-protos.sh
3. Or use the Makefile: make rust-proto-gen

Common Issues

If you see differences in generated files between local and CI:

• It's usually due to protoc version differences
• Different versions may format the generated code slightly differently
• The functionality remains the same, only formatting changes

To avoid this:

• Use the same protoc version as CI (25.1)
• Or accept the formatting from your version and update CI if needed

Dependencies

This crate requires:

• protoc (Protocol Buffers compiler)
• tonic-build for code generation
• prost for runtime support

The build dependencies are specified in Cargo.toml and use workspace versions for consistency.