Revolt Backend

The services and libraries that power the Revolt service.

Crate	Path	Description
core/config	crates/core/config	Core: Configuration
core/database	crates/core/database	Core: Database Implementation
core/files	crates/core/files	Core: S3 and encryption subroutines
core/models	crates/core/models	Core: API Models
core/permissions	crates/core/permissions	Core: Permission Logic
core/presence	crates/core/presence	Core: User Presence
core/result	crates/core/result	Core: Result and Error types
core/coalesced	crates/core/coalesced	Core: Coalescion service
delta	crates/delta	REST API server
bonfire	crates/bonfire	WebSocket events server
services/january	crates/services/january	Proxy server
services/gifbox	crates/services/gifbox	Tenor proxy server
services/autumn	crates/services/autumn	File server
daemons/crond	crates/daemons/crond	Timed data clean up daemon server
daemons/pushd	crates/daemons/pushd	Push notification daemon server

Minimum Supported Rust Version

Rust 1.86.0 or higher.

Caution

The events server has a significant performance regression between Rust 1.77.2 and 1.78.0 onwards, see issue #341. This is currently solved by build time options but we are looking for a proper fix.

Development Guide

Before contributing, make yourself familiar with our contribution guidelines and the technical documentation for this project.

Before getting started, you'll want to install:

• Rust toolchain (rustup recommended)
• Docker
• Git
• mold (optional, faster compilation)

A default.nix is available for Nix users! Just run nix-shell and continue.

As a heads-up, the development environment uses the following ports:

Service	Port
MongoDB	27017
Redis	6379
MinIO	14009
Maildev	14025 14080
Revolt Web App	14701
RabbitMQ	5672 15672
crates/delta	14702
crates/bonfire	14703
crates/services/autumn	14704
crates/services/january	14705
crates/services/gifbox	14706

Now you can clone and build the project:

git clone https://github.com/revoltchat/backend revolt-backend
cd revolt-backend
cargo build

A default configuration Revolt.toml is present in this project that is suited for development.

If you'd like to change anything, create a Revolt.overrides.toml file and specify relevant variables.

Tip

Use Sentry to catch unexpected service errors:

# Revolt.overrides.toml
[sentry]
api = "https://abc@your.sentry/1"
events = "https://abc@your.sentry/1"
files = "https://abc@your.sentry/1"
proxy = "https://abc@your.sentry/1"

Tip

If you have port conflicts on common services, you can try the following:

# compose.override.yml
services:
  redis:
    ports: !override
      - "14079:6379"

  database:
    ports: !override
      - "14017:27017"

  rabbit:
    ports: !override
      - "14072:5672"
      - "14672:15672"

And corresponding Revolt configuration:

#     Revolt.overrides.toml
# and Revolt.test-overrides.toml
[database]
mongodb = "mongodb://127.0.0.1:14017"
redis = "redis://127.0.0.1:14079/"

[rabbit]
port = 14072

Then continue:

# start other necessary services
docker compose up -d

# run everything together
./scripts/start.sh
# .. or individually
# run the API server
cargo run --bin revolt-delta
# run the events server
cargo run --bin revolt-bonfire
# run the file server
cargo run --bin revolt-autumn
# run the proxy server
cargo run --bin revolt-january
# run the tenor proxy
cargo run --bin revolt-gifbox
# run the push daemon (not usually needed in regular development)
cargo run --bin revolt-pushd

# hint:
# mold -run <cargo build, cargo run, etc...>
# mold -run ./scripts/start.sh

You can start a web client by doing the following:

# if you do not have yarn yet and have a modern Node.js:
corepack enable

# clone the web client and run it:
git clone --recursive https://github.com/revoltchat/revite
cd revite
yarn
yarn build:deps
echo "VITE_API_URL=http://local.revolt.chat:14702" > .env.local
yarn dev --port 14701

Then go to http://local.revolt.chat:14701 to create an account/login.

When signing up, go to http://localhost:14080 to find confirmation/password reset emails.

Deployment Guide

Cutting new crate releases

Begin by bumping crate versions:

just patch # 0.0.X
just minor # 0.X.0
just major # X.0.0

Then commit the changes to package files.

Proceed to publish all the new crates:

just publish

Cutting new binary releases

Tag and push a new release by running:

just release

If you have bumped the crate versions, proceed to GitHub releases to create a changelog.

Testing

First, start the required services:

docker compose -f docker-compose.db.yml up -d

Now run tests for whichever database:

TEST_DB=REFERENCE cargo nextest run
TEST_DB=MONGODB cargo nextest run

License

The Revolt backend is generally licensed under the GNU Affero General Public License v3.0.

Individual crates may supply their own licenses!