Confidence Rust Flags Resolver

The Confidence Flag Resolver implemented in Rust, plus example hosts and a Cloudflare Worker build. This workspace compiles the core resolver to native and WebAssembly and demonstrates how to call it from Go, Node.js, Python, and Java.

Repository layout

• confidence-resolver: Core resolver crate
• confidence-cloudflare-resolver: Cloudflare Worker-compatible WASM target
• wasm-msg: Minimal WASM messaging layer shared by hosts
• wasm/*-host: Small host apps (Go, Node.js, Python, Java) calling the resolver. These are only intended to be examples, as well as being used for integration tests.
• data/: Sample local development data (e.g., resolver state)

Prerequisites

Option 1: Docker only

• Docker - Everything runs in containers, no other tools needed

Option 2: Local development

• Rust toolchain (automatically installed via rust-toolchain.toml)
• For host examples: Go, Node.js + Yarn, Python 3, Java + Maven

Quick Start

# With Docker (reproducible, no setup needed)
docker build .                    # Build, test, lint everything
make                              # Same, using Makefile

# E2E tests require Confidence credentials passed as Docker secret
# Create openfeature-provider/js/.env.test with your credentials, then:
docker build \
  --secret id=js_e2e_test_env,src=openfeature-provider/js/.env.test \
  .

# With local tools (fast iteration)
make test                         # Run tests
make lint                         # Run linting
make build                        # Build WASM

# Run host examples
make run-node
make run-java
make run-go
make run-python

Running the example hosts

There are host implementations for different languages in the wasm folder. They are used for integration tests, but if you want you manually run them:

make run-go-host
make run-js-host
make run-python-host
make run-java-host

Cloudflare Worker build

Build the Cloudflare-compatible resolver (WASM):

make cloudflare

You can then integrate with Wrangler using confidence-cloudflare-resolver/wrangler.toml.

License

See LICENSE for details.