Rust implementation of the Harmony chat protocol. Currently implements a lightweight client and a client API (powered by hrpc), along with auto generated API via hrpc-build.

Requirements

• Latest stable Rust and Cargo.
• If you are using Nix, nix-shell (or nix develop if you use flakes) should get you covered.
• Otherwise, you'll need to get protobuf and make sure protoc is in your PATH env variable.
  • If for some reason build.rs fails, make sure to set:
    • PROTOC env variable to your protoc executable
    • and PROTOC_INCLUDE env variable to wherever protobuf include files are located, most likely in /usr/share/include.

Examples

• message_log: Showcases a simple message log bot that operates in a guild. It will log messages to the console whenever someone posts a message.
• Bot run instructions:
  • Run bots with GUILD_INVITE=invite cargo run --package example_name.
  • Make sure the bot has necessary permissions to view channels / send messages etc.

Crate features

• By default, only a bare-bones common API types used in Harmony is generated. You can customize the crate to your needs by enabling feature(s) listed below:
  • Enable gen_all_protocols to enable all protocols, stable and staging.
  • Enable rkyv feature to derive rkyv::{Archive, Deserialize, Serialize} for all Harmony API types (except the batch service).
    • Enable rkyv_validation to derive bytecheck::CheckBytes for all Harmony API types and enable rkyv/validation.
  • Enable serde_derive feature to derive serde::{Deserialize, Serialize} for all Harmony API types (except the batch service).
  • Enable valuable feature to derive valuable::Valuable for all Harmony API types (except the batch service).
  • customizing hRPC codegen:
    • Enable the gen_client feature to generate client service code for enabled protocols.
    • Enable the gen_server feature to generate server service code for enabled protocols.
  • Client:
    • Enable the client_native feature for a lightweight client implementation that uses hyper and works on native platforms.
    • Enable the client_web feature for a lightweight client implementation that works on web platforms (WASM).
    • Enable the client_backoff feature to enable request retrying on ratelimited requests.
  • Stable protocols (enable gen_stable_protocols for all):
    • Enable the gen_chat feature to generate chat service code.
    • Enable the gen_auth feature to generate auth service code.
    • Enable the gen_mediaproxy feature to generate media proxy service code.
    • Enable the gen_harmonytypes feature to generate common Harmony types.
    • Enable the gen_sync feature to generate sync service code.
    • Enable the gen_emote feature to generate emote service code.
    • Enable the gen_profile feature to generate profile service code.
    • Enable the gen_batch feature to generate batch service code.
    • Enable the rest feature to include REST API code.
  • Staging protocols (enable gen_staging_protocols for all):
    • Enable the staging_gen_voice feature to generate voice service code.
    • Enable the staging_gen_bots feature to generate bots service code.

MSRV

Minimum Supported Rust Version: current stable.

Changing MSRV is not considered a semver-breaking change.