> For the complete documentation index, see [llms.txt](/llms.txt).

# Get Ed25519 private key

After a user signs in, retrieve their Ed25519 private key from the sign-in response or by calling `getEd25519PrivateKey()`. Use this key with a compatible library to sign transactions on chains that use Ed25519. Never log or persist an unencrypted private key.

## Usage[​](#usage "Direct link to Usage")

```
private void onLogin(Web3AuthResponse response)
{
    var ed25519PrivateKey = response.ed25519PrivateKey;

    // Use the Ed25519 private key with a compatible blockchain library
}

```

You can also retrieve the key from the active session:

```
var ed25519PrivateKey = web3Auth.getEd25519PrivateKey();

```