Thanks for your interest in contributing to the Fuel indexer! Below we've compiled a list of sections that you may find useful as you work on a potential contribution:
We use fuelup in order to get the binaries produced by services in the Fuel ecosystem. Fuelup will install binaries related to the Fuel node, the Fuel indexer, the Fuel orchestrator (forc), and other components.
fuelup can be downloaded here .
We use Docker to produce reproducible environments for users that may be concerned with installing components with large sets of dependencies (e.g. Postgres). Docker can be downloaded here .
At this time, the Fuel indexer requires the use of a database. We currently support a single database option: Postgres. PostgreSQL is a database solution with a complex feature set and requires a database server.
Note: The following explanation is for demonstration purposes only. A production setup should use secure users, permissions, and passwords.
On macOS systems, you can install PostgreSQL through Homebrew. If it isn't present on your system, you can install it according to the instructions . Once installed, you can add PostgreSQL to your system by running
brew install postgresql. You can then start the service through
brew services start postgresql. You'll need to create a database for your indexed data, which you can do by running
createdb [DATABASE_NAME]. You may also need to create the
postgres role; you can do so by running
createuser -s postgres.
For Linux-based systems, the installation process is similar. First, you should install PostgreSQL according to your distribution's instructions. Once installed, there should be a new
postgres user account; you can switch to that account by running
sudo -i -u postgres. After you have switched accounts, you may need to create a
postgres database role by running
createuser --interactive. You will be asked a few questions; the name of the role should be
postgres and you should elect for the new role to be a superuser. Finally, you can create a database by running
In either case, your PostgreSQL database should now be accessible at
After setting up your database, you should install
sqlx-cli in order to run migrations for your indexer service. You can do so by running
cargo install sqlx-cli --features postgres. Once installed, you can run the migrations by running the following command after changing
DATABASE_URL to match your setup.
cd packages/fuel-indexer-database/postgres DATABASE_URL=postgres://postgres@localhost sqlx migrate run
cargo run --bin fuel-indexer run
You can also start the service with a fresh local node for development purposes:
cargo run --features fuel-core-lib --bin fuel-indexer run
If no configuration file or other options are passed, the service will default to a
Fuel indexer tests are currently broken out by a database feature flag. In order to run tests with a Postgres backend, use
cargo test --locked --workspace --all-targets
cargo test --locked --workspace --all-targets --features postgres
For tests related to the meta-programming used in the Fuel indexer, we use
RUSTFLAGS='-D warnings' cargo test -p fuel-indexer-macros --locked