https://github.com/genkey6/ld-relay-client-dart

A client implementation for Relay Proxy of LaunchDarkly in Dart
https://github.com/genkey6/ld-relay-client-dart

feature-flags feature-toggles launchdarkly

Last synced: 4 months ago
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A client implementation for Relay Proxy of LaunchDarkly in Dart

• Host: GitHub
• URL: https://github.com/genkey6/ld-relay-client-dart
• Owner: genkey6
• License: other
• Created: 2023-12-09T09:14:11.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2026-01-30T21:55:28.000Z (5 months ago)
• Last Synced: 2026-01-31T13:32:23.583Z (5 months ago)
• Topics: feature-flags, feature-toggles, launchdarkly
• Language: Dart
• Homepage:
• Size: 26.4 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE

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README

          
# ld-relay-client-dart

[![GitHub Actions](https://github.com/genkey6/ld-relay-client-dart/actions/workflows/ci.yaml/badge.svg)](https://github.com/genkey6/ld-relay-client-dart/actions/workflows/ci.yaml)

[![Pub](https://img.shields.io/pub/v/ld_relay_client.svg)](https://pub.dev/packages/ld_relay_client)

A client implementation for [Relay Proxy](https://docs.launchdarkly.com/home/relay-proxy) of [LaunchDarkly](https://launchdarkly.com/) in Dart.

## How to use

### Step 1: Installation

```

dart pub add ld_relay_client

```

### Step 2: Initialize the client

```dart

import 'package:ld_relay_client/ld_relay_client.dart';

import 'package:http/http.dart' as http;

import 'package:logger/logger.dart';

final client = LDRelayClient(

  LDRelayConfig(

    sdkKey: '', // your LaunchDarkly server-side SDK key (caution: The SDK key should be kept a secret)

    ldRelayBaseUrl: 'http://localhost:8030', // the base URL for Relay Proxy

  ),

  http.Client(),

  Logger(),

);

```

### Step 3: Evaluate the flag value and switch the logic

```dart

// with single context

final evalResultWithSingleContext =

    await client.boolVariation('flag-key1', false, {

  'user': LaunchDarklyContextAttribute(key: 'user1'),

});

if (evalResultWithSingleContext) {

  // do something

} else {

  // do something else

}

// with multi contexts

final evalResultWithMultiContext =

    await client.boolVariation('flag-key2', false, {

  'user': LaunchDarklyContextAttribute(key: 'user2'),

  'tenant': LaunchDarklyContextAttribute(key: 'tenant2'),

});

if (evalResultWithMultiContext) {

  // do something

} else {

  // do something else

}

```