Unleash OpenFeature Rust Provider

Rust OpenFeature provider backed by the Unleash Rust SDK.

Build

cargo build

Test

cargo test

Test Harness

This repository includes the OpenFeature provider verifier as a git submodule. After cloning, initialize it before running the full test suite:

git submodule update --init --recursive

If the verifier submodule is intentionally updated, refresh it and commit the new submodule pointer:

git submodule update --remote --merge verifier
git status

Example

cargo run --example boolean_flag -- \
  --url https://app.unleash-hosted.com/demo/api \
  --api-key "$UNLEASH_API_KEY" \
  --flag-key my-feature \
  --targeting-key user-123

The Unleash Rust client must be created with string feature lookup enabled:

use unleash_api_client::ClientBuilder;
use unleash_openfeature_rust_provider::{UnleashApiClient, UnleashFlagProvider};

let unleash_client = ClientBuilder::default()
    .enable_string_features()
    .into_client::<NoFeatures>(
        url,
        app_name,
        instance_id,
        Some(api_key),
    )?;

let provider = UnleashFlagProvider::new(UnleashApiClient::new(unleash_client));
provider.initialize_client().await?;