ld-relay-client-dart

A client implementation for Relay Proxy of LaunchDarkly in Dart.

How to use

Step 1: Installation

dart pub add ld_relay_client

Step 2: Initialize the client

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-server-sdk-key>', // 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

// 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
}