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

# Ed25519 private key

To retrieve the secp256k1 private key of the user., use `getEd25519PrivKey` method. This private key can be used to sign transactions on Solana, Near, Algorand, and other chains that use the ed25519 curve.

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

```
final privateKey = await Web3AuthFlutter.getEd25519PrivKey();

```

note

Web3Auth supports two widely used cryptographic curves, Secp256k1 and Ed25519, making it chain-agnostic and compatible with multiple blockchain networks. [Learn more about how to connect different blockchains](/embedded-wallets/connect-blockchain/).