Quick Start Guide

This guide provides step-by-step instructions for setting up OpenZeppelin Relayer. It includes prerequisites, installation, and configuration examples.

Prerequisites

Rust 2021 edition
Redis
Docker (optional, for containerized deployment)

Configuration

Step 1: Clone the Repository

Clone the repository and navigate to the project directory:

git clone https://github.com/OpenZeppelin/openzeppelin-relayer
cd openzeppelin-relayer

Step 2: Create Configuration Files

Create environment configuration:

cp .env.example .env

These files are already partially configured. We will add missing data in next steps.

Ready-to-Use Example Configurations

For quick setup with various configurations, check the examples directory in our GitHub repository:

Step 3: Create a Signer

Generate a new signer keystore for the basic example:

cargo run --example create_key -- \
  --password <DEFINE_YOUR_PASSWORD> \
  --output-dir examples/basic-example/config/keys \
  --filename local-signer.json

Replace <DEFINE_YOUR_PASSWORD> with a strong password.

Your password must contain at least:

12 characters
One uppercase letter
One lowercase letter
One number
One special character

Next, update the KEYSTORE_PASSPHRASE in .env with the password you used above.

Step 4: Configure Notifications

Configure Webhook URL

Edit the file config/config.json and update the notifications[0].url field with your webhook URL. For a quick test, you can use a temporary URL from Webhook.site.

Configure Webhook Signing Key

Generate a webhook signing key:

cargo run --example generate_uuid

Alternatively, you can use any online UUID generator tool if you don’t want to run the included command.

Copy the generated UUID and update the WEBHOOK_SIGNING_KEY entry in .env.

Step 5: Configure API Key

Generate an API key signing key for development:

cargo run --example generate_uuid

You can also use UUID generator with a simple command on your terminal.

uuidgen

Alternatively, you can use any online UUID generator tool.

Copy the generated UUID and update the API_KEY entry in .env.

Step 6: Run the Service

Local

Run Redis container:

docker run --name openzeppelin-redis \
  -p 6379:6379 \
  -d redis:latest

Run Relayer service:

cargo run

Docker

Building and Running the docker image:

docker compose up -d

By default docker compose command uses Dockerfile.development to build the image. If you want to use Dockerfile.production, you can use the following command:

DOCKERFILE=Dockerfile.production docker compose up -d

Step 7: Test the Relayer

Verify the service by sending a GET request:

curl -X GET http://localhost:8080/api/v1/relayers \
  -H "Content-Type: application/json" \
  -H "AUTHORIZATION: Bearer YOUR_API_KEY"

Replace YOUR_API_KEY with the API key you configured in your .env file.

Expected Result: A successful request should return an HTTP 200 status code along with the list of relayers.

Using the relayer through the API

For detailed API usage, refer to the API guide. The guide provides endpoint descriptions, usage examples, and best practices for integrating with the relayer service.

Using the relayer through the SDK

For documentation and examples on how to consume Relayer service via SDK check SDK documentation.

Additional Resources and Troubleshooting

Troubleshooting: If you encounter issues during setup or deployment, verify your environment variables, check container logs, and review your configuration files for syntax errors.