jar.diff

diff --git a/examples/oauth.ts b/examples/jar.ts
index d55e62d..456e1fb 100644
--- a/examples/oauth.ts
+++ b/examples/jar.ts
@@ -15,6 +15,11 @@ let client_secret!: string
  * Server.
  */
 let redirect_uri!: string
+/**
+ * A key that is pre-registered at the Authorization Server that the client is supposed to sign its
+ * Request Objects with.
+ */
+let jarPrivateKey!: oauth.CryptoKey
 
 // End of prerequisites
 
@@ -35,15 +40,16 @@ const code_verifier = oauth.generateRandomCodeVerifier()
 const code_challenge = await oauth.calculatePKCECodeChallenge(code_verifier)
 let state: string | undefined
 
+// Signed Request Object (JAR)
+let request: string
 {
-  // redirect user to as.authorization_endpoint
-  const authorizationUrl = new URL(as.authorization_endpoint!)
-  authorizationUrl.searchParams.set('client_id', client.client_id)
-  authorizationUrl.searchParams.set('redirect_uri', redirect_uri)
-  authorizationUrl.searchParams.set('response_type', 'code')
-  authorizationUrl.searchParams.set('scope', 'api:read')
-  authorizationUrl.searchParams.set('code_challenge', code_challenge)
-  authorizationUrl.searchParams.set('code_challenge_method', code_challenge_method)
+  const params = new URLSearchParams()
+  params.set('client_id', client.client_id)
+  params.set('redirect_uri', redirect_uri)
+  params.set('response_type', 'code')
+  params.set('scope', 'api:read')
+  params.set('code_challenge', code_challenge)
+  params.set('code_challenge_method', code_challenge_method)
 
   /**
    * We cannot be sure the AS supports PKCE so we're going to use state too. Use of PKCE is
@@ -51,9 +57,18 @@ let state: string | undefined
    */
   if (as.code_challenge_methods_supported?.includes('S256') !== true) {
     state = oauth.generateRandomState()
-    authorizationUrl.searchParams.set('state', state)
+    params.set('state', state)
   }
 
+  request = await oauth.issueRequestObject(as, client, params, jarPrivateKey)
+}
+
+{
+  // redirect user to as.authorization_endpoint
+  const authorizationUrl = new URL(as.authorization_endpoint!)
+  authorizationUrl.searchParams.set('client_id', client.client_id)
+  authorizationUrl.searchParams.set('request', request)
+
   // now redirect the user to authorizationUrl.href
 }