# Troubleshooting

## Authentication Errors

### `AuthenticationError: Invalid or missing API key`

The server rejected your API key.

**Causes and fixes:**

- Key not set — pass `apiKey` to the constructor or use `process.env.NOMYO_API_KEY`.
- Key has leading/trailing whitespace — check the value with `console.log(JSON.stringify(process.env.NOMYO_API_KEY))`.
- Key contains CR or LF characters — the client rejects keys with `\r` or `\n` and throws `SecurityError` before the request is sent. Regenerate the key.

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,  // never hardcode
});
```

---

## Connection Errors

### `APIConnectionError: Network error` / `connect ECONNREFUSED`

The client could not reach the router.

**Check:**

1. `baseUrl` is correct — the default is `https://api.nomyo.ai` (port **12435**).
2. You have network access to the host.
3. TLS is not being blocked by a proxy or firewall.

### `SecurityError: HTTPS is required`

You passed an `http://` URL without setting `allowHttp: true`.

```javascript
// Local dev only
const client = new SecureChatCompletion({
  baseUrl: 'http://localhost:12435',
  allowHttp: true,
});
```

Never set `allowHttp: true` in production — the server public key fetch and all request data would travel unencrypted.

### `APIConnectionError: Request timed out`

The default timeout is 60 seconds. Larger models or busy endpoints may need more:

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,
  timeout: 120000,  // 2 minutes
});
```

---

## Key Loading Failures

### `Error: Failed to load keys: no such file or directory`

The `keyDir` directory or the PEM files inside it don't exist. On first run the library generates and saves a new key pair automatically. If you specified a custom `keyDir`, make sure the directory is writable:

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,
  keyDir: '/var/lib/myapp/nomyo-keys',  // directory must exist and be writable
});
```

### `Error: Invalid passphrase` / `Error: Failed to decrypt private key`

The password you passed to `loadKeys()` or `keyRotationPassword` doesn't match what was used to encrypt the file.

```javascript
await client.loadKeys(
  'client_keys/private_key.pem',
  'client_keys/public_key.pem',
  process.env.NOMYO_KEY_PASSWORD,  // must match the password used on generateKeys()
);
```

### `Error: RSA key too small`

The library enforces a minimum key size of 2048 bits. If you have old 1024-bit keys, regenerate them:

```javascript
await client.generateKeys({
  saveToFile: true,
  keyDir: 'client_keys',
  keySize: 4096,  // recommended
});
```

### `Error: Failed to load keys` (browser)

Key loading from files is a Node.js-only feature. In browsers, keys are generated in memory on first use. Do not call `loadKeys()` in a browser context.

---

## Rate Limit Errors

### `RateLimitError: Rate limit exceeded`

All automatic retries were exhausted. The default limit is 2 requests/second; burst allows 4 requests/second once per 10-second window.

**Fixes:**

- Reduce concurrency — avoid large `Promise.all` batches.
- Add client-side throttling (see [Rate Limits](rate-limits.md)).
- Increase `maxRetries` so the client backs off longer before giving up:

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,
  maxRetries: 5,
});
```

### `ServiceUnavailableError` with 30-minute cool-down

Burst limits were hit repeatedly and a cool-down was applied to your key. Wait 30 minutes, then review your request patterns.

---

## Model / Tier Errors

### `ForbiddenError: Model not allowed for this security tier`

The model you requested is not available at the security tier you specified. Try a lower tier or a different model:

```javascript
// If 'maximum' tier rejects the model, try 'high' or 'standard'
const response = await client.create({
  model: 'Qwen/Qwen3.5-27B',
  messages: [...],
  security_tier: 'high',  // try 'standard' if still rejected
});
```

See [Models — Security Tier Compatibility](models.md#security-tier-compatibility) for details.

---

## Crypto / Security Errors

### `SecurityError: Decryption failed`

The response could not be decrypted. This is intentionally vague to avoid leaking crypto details.

**Possible causes:**

- The server returned a malformed response (check `debug: true` output).
- A network proxy modified the response body.
- The server's public key changed mid-session — the next request will re-fetch it automatically.

Enable debug mode to log the raw response and narrow the cause:

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,
  debug: true,
});
```

### `Error: Unsupported protocol version` / `Error: Unsupported encryption algorithm`

The server sent a response in a protocol version or with an encryption algorithm not supported by this client version. Update the package:

```bash
npm update nomyo-js
```

---

## `DisposedError`: Method called after `dispose()`

You called a method on a client that has already been disposed.

```javascript
client.dispose();
await client.create(...);  // throws DisposedError
```

Create a new client instance if you need to make more requests after disposal.

---

## Memory Protection Warnings

### `getMemoryProtectionInfo()` returns `method: 'zero-only'`

This is normal for a pure JavaScript installation. The library zeroes sensitive buffers immediately after use but cannot lock pages to prevent swapping (OS `mlock` requires a native addon).

```javascript
import { getMemoryProtectionInfo } from 'nomyo-js';

const info = getMemoryProtectionInfo();
// { method: 'zero-only', canLock: false, isPlatformSecure: false }
```

For environments where swap-file exposure is unacceptable (HIPAA PHI, classified data), install the optional `nomyo-native` addon or run on a system with swap disabled.

---

## Node.js-Specific Issues

### `ReferenceError: crypto is not defined`

In CommonJS modules on Node.js before v19, `crypto` is not a global. Import it explicitly:

```javascript
// CommonJS
const { webcrypto } = require('crypto');
global.crypto = webcrypto;

// Or switch to ES modules (recommended)
// package.json: "type": "module"
```

The library itself imports `crypto` correctly — this error only appears if your own application code tries to use `crypto` directly.

### `SyntaxError: Cannot use import statement in a module` / CommonJS vs ESM

The package ships both CommonJS (`dist/node/`) and ESM (`dist/esm/`) builds. Node.js selects the correct one automatically via `package.json` `exports`. If you see import errors, check that your `package.json` or bundler is not forcing the wrong format.

For ESM: set `"type": "module"` in your `package.json` or use `.mjs` file extensions.
For CommonJS: use `require('nomyo-js')` or `.cjs` extensions.

### TypeScript: `Cannot find module 'nomyo-js'` / missing types

Ensure your `tsconfig.json` includes `"moduleResolution": "bundler"` or `"moduleResolution": "node16"` and that `nomyo-js` is in `dependencies` (not just `devDependencies`):

```bash
npm install nomyo-js
```

---

## Browser-Specific Issues

### `Content Security Policy blocked`

If your app's CSP restricts `script-src` or `connect-src`, add the NOMYO API domain:

```
Content-Security-Policy: connect-src https://api.nomyo.ai;
```

### `TypeError: Failed to fetch` (CORS)

The NOMYO API includes CORS headers. If you see CORS errors in a browser, verify the `baseUrl` is correct (HTTPS, correct port) and that no browser extension is blocking the request.

### Keys not persisted across page reloads

This is expected behaviour — browsers do not have file system access. Keys are generated fresh on each page load. If you need persistent keys in a browser context, implement your own `loadKeys`/`generateKeys` wrapper using `localStorage` or `IndexedDB` (not recommended for high-security scenarios).

---

## Debugging Tips

### Enable verbose logging

```javascript
const client = new SecureChatCompletion({
  apiKey: process.env.NOMYO_API_KEY,
  debug: true,
});
```

Debug mode logs: key generation/loading, server public key fetches, request encryption details, retry attempts, and response decryption.

### Check memory protection status

```javascript
import { getMemoryProtectionInfo } from 'nomyo-js';
console.log(getMemoryProtectionInfo());
```

### Inspect response metadata

The `_metadata` field in every response carries server-side diagnostics:

```javascript
const response = await client.create({ ... });
console.log(response._metadata);
// {
//   payload_id: '...',
//   is_encrypted: true,
//   encryption_algorithm: 'hybrid-aes256-rsa4096',
//   security_tier: 'standard',
//   memory_protection: { ... },
// }
```

### Test with minimum configuration

Strip all optional configuration and test with the simplest possible call to isolate the issue:

```javascript
import { SecureChatCompletion } from 'nomyo-js';

const client = new SecureChatCompletion({ apiKey: process.env.NOMYO_API_KEY });
const r = await client.create({
  model: 'Qwen/Qwen3-0.6B',
  messages: [{ role: 'user', content: 'ping' }],
});
console.log(r.choices[0].message.content);
client.dispose();
```