> For the complete documentation index, see [llms.txt](https://docs.constellationnetwork.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.constellationnetwork.io/network-apis/api-reference/dag4.js/message-signing.md).

# Message Signing

#### Sign an arbitrary message[​](https://docs.constellationnetwork.io/hypergraph/dag4-message-signing#sign-an-arbitrary-message) <a href="#sign-an-arbitrary-message" id="sign-an-arbitrary-message"></a>

The dag4-keystore package can be used to sign messages using a private key. Messages are signed using secp256k1 which generates a deterministic and canonical ECDSA signature that can be verified with a public key. This example code is not intended to be used to sign transactions.

```typescript
const privKey = dag4.keyStore.generatePrivateKey();
const pubKey = dag4.keyStore.getPublicKeyFromPrivate(privateKey);

const signature = await dag4.keyStore.sign(privKey, message);

const verified = dag4.keyStore.verify(pubKey, message, signature);

if (verified) {
  console.log('Signature verified');
} else {
  console.log('Signature invalid');
}
```


---

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