You can close this window and return to your terminal.
\n \n \n \n `);\n\n server.close();\n resolve(tokens);\n } catch (error) {\n res.writeHead(500);\n res.end('Token exchange failed');\n server.close();\n reject(error);\n }\n }\n });\n\n server.listen(port, '127.0.0.1', () => {\n // console.log(`🔐 OAuth callback server listening on port ${port}`);\n });\n\n // Timeout after 5 minutes\n setTimeout(() => {\n server.close();\n reject(new Error('Authentication timeout'));\n }, 5 * 60 * 1000);\n });\n}","sourceCodeStart":171,"sourceCodeEnd":207,"githubUrl":"https://github.com/slopus/happy/blob/b824cd0a4681d41af631a8e422a813873e4455b0/packages/happy-cli/src/commands/connect/authenticateCodex.ts#L171-L207","documentation":"After receiving a valid `code`, startCallbackServer calls exchangeCodeForTokens(), which POSTs to OpenAI's token endpoint with the code, PKCE verifier, client_id, and redirect_uri. Any failure inside that block — non-2xx token response, network error, or a malformed/unparseable ID token — is caught and the callback responds HTTP 500 'Token exchange failed' while rejecting the promise with the underlying error.","triggerScenarios":"The POST to https://auth.openai.com/oauth/token fails: invalid/expired/already-used authorization code, PKCE code_verifier mismatch (redirect_uri or port changed between authorize and token calls), network outage, or the returned id_token is not a valid 3-part JWT (parseJWT throws).","commonSituations":"Authorization code replayed after a browser refresh of the callback page; corporate firewall/proxy blocking auth.openai.com; system clock skew invalidating tokens; OpenAI-side outage returning 5xx; port reuse causing a different redirect_uri than the one used in the authorize request.","solutions":["Read the CLI log / the rejected error for the detailed token-endpoint response body (e.g. 'invalid_grant'), then rerun the connect flow with a fresh authorization code.","Never refresh or bookmark the callback URL — a second GET reuses the consumed code; start a new authentication attempt.","Check network reachability to auth.openai.com (VPN, corporate proxy, firewall) and system clock accuracy.","Update happy-cli; older builds can mis-parse ID token claims (chatgpt_account_id extraction) and fail after a successful exchange."],"exampleFix":"// before: double-consuming the code by reloading the callback page\n// GET http://localhost:1455/auth/callback?code=abc&state=xyz (x2 — second fails with invalid_grant)\n// after: on any failure, rerun the full flow\nconst tokens = await authenticateCodex(); // new code, new verifier, new state","handlingStrategy":"retry","validationCode":"// Pre-flight: confirm the token endpoint is reachable before starting the flow\nconst reachable = await fetch('https://auth.openai.com/.well-known/openid-configuration')\n .then(r => r.ok).catch(() => false);\nif (!reachable) throw new Error('auth.openai.com unreachable — fix network/proxy before authenticating');","typeGuard":null,"tryCatchPattern":"async function connectWithRetry(maxAttempts = 2): Promise