---
title: "sdk/ruby"
description: "Ruby server SDK for networkless JWT verification, Rack/Rails request authentication, and webhook signature validation."
locale: "en"
---

> Documentation Index
> Fetch the relevant documentation index at: https://vonvon.id/sdks/llms.txt
> Use this file to discover all available pages before exploring further.

# sdk/ruby

## Status

Implemented and verified locally. Real IdP round-trip verification (JWKS fetch, token sign/verify against a live Vonvon instance) has not been performed yet and must be completed before production use.

Registry status: UNPUBLISHED. Install this SDK only from the repository source checkout; do not use an external package registry.

Request authentication is Bearer-only by default. An application-owned JWT cookie is read only when its exact name is configured. The opaque \_\_Host-vonvon.rt.\* Core cookie is never scanned or verified locally; exchange it by forwarding the complete Cookie header to exact same-origin POST /v1/sessions/token with redirects disabled, and accept only a response containing the token field.

## Install

```ruby
# Gemfile
gem "vonvon", path: "../vonvon/sdk/ruby"

bundle install
```

## Quick start

```ruby
require "vonvon"

Vonvon.configure do |c|
  c.issuer         = "https://vonvon.id"
  c.audience       = "your_client_id"
  c.webhook_secret = "whsec_AbCdEf..."
end

# Verify a token
begin
  claims = Vonvon.verify_token(raw_token)
  puts claims.sub    # => "usr_abc123"
  puts claims.scope  # => "openid profile email"
rescue Vonvon::TokenVerificationError => e
  puts "Token invalid: #{e.message}"
end
```

## Authenticate a Rack/Rails request

```ruby
# Sinatra before-filter
before do
  auth = Vonvon.authenticate_request(request)
  halt 401, "Unauthorized" unless auth.signed_in?
  @current_user_id = auth.claims.sub
end

# Explicit same-origin Core session -> JWT exchange
token = Vonvon.exchange_session_token(
  incoming_request_url: request.url,
  cookie_header: request.get_header("HTTP_COOKIE")
)
```

## Verify webhook

```ruby
# Rails controller action
def receive
  raw_body = request.raw_post
  payload = Vonvon.verify_webhook(request.headers.to_h, raw_body)
  handle_event(payload["type"], payload["data"])
  head :ok
rescue Vonvon::WebhookVerificationError
  head :bad_request
end
```

## Multi-issuer setup

```ruby
config_a = Vonvon::Configuration.new
config_a.issuer   = "https://tenant-a.vonvon.id"
config_a.audience = "client_a"
client_a = Vonvon::Client.new(config_a)
claims = client_a.verify_token(token)
```

## Configuration options

| Key | Default | Description |
| --- | --- | --- |
| `issuer` | `https://vonvon.id` | OIDC issuer URL |
| `audience` | `nil` | Expected aud claim; nil skips validation |
| `jwks_ttl` | `3600` | JWKS local cache TTL in seconds |
| `leeway` | `60` | JWT clock skew tolerance in seconds |
| `webhook_secret` | `nil` | Webhook signing secret with `whsec_` prefix |
| `webhook_tolerance` | `300` | Webhook replay window in seconds |
| `cookie_name` | `disabled` | Application-owned JWT cookie name; disabled unless explicitly configured |

## Platform notes

- Depends on the `jwt` gem (ES256/RS256 support). Ruby 3.1+ required.
- `Vonvon.authenticate_request` accepts both a Rack env hash and a Rack `Request` object.
- Exception hierarchy: `Vonvon::Error` -> `ConfigurationError`, `JwksError`, `TokenVerificationError`, `WebhookVerificationError`.

Source: https://vonvon.id/sdks/ruby/index.mdx