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Common Provider

@web3auth/base-provider​

For connecting to blockchains other than EVM, Solana, and XRPL, you need to use the private key from Web3Auth and manually make RPC calls to the blockchain. This flow is facilitated by @web3auth/base-provider package.

In this section, we'll explore more about how you can use this provider with our SDKs.

Installation​

@web3auth/base-provider​

npm install --save @web3auth/base-provider

Initialisation​

Import the CommonPrivateKeyProvider class from @web3auth/base-provider.

import { CommonPrivateKeyProvider } from "@web3auth/base-provider";

Assign the CommonPrivateKeyProvider class to a variable​

After creating your Web3Auth instance, you need to initialize the CommonPrivateKeyProvider and add it to a class for further usage.

const privateKeyProvider = new CommonPrivateKeyProvider();
Note
  • The common private key provider only exposes one RPC method (i.e. 'private_key') to get the private key of the logged-in user.

Setting up the provider​

For Web3Auth PnP Web SDKs​

If you are using chainNamespace: "other" while initializing Web3Auth or Web3AuthNoModal with the OpenloginAdapter, you need to add the privateKeyProvider to the OpenLogin instance.

const chainConfig = {
    chainId: "0x1",
    chainNamespace: CHAIN_NAMESPACES.OTHER,
    rpcTarget: "https://any-rpc-endpoint.com",
};

const web3auth = new Web3AuthNoModal({
  clientId,
  chainConfig,
  web3AuthNetwork: "sapphire_mainnet",
});

const privateKeyProvider = new CommonPrivateKeyProvider(config: chainConfig);

const openloginAdapter = new OpenloginAdapter({
  privateKeyProvider,
  adapterSettings: {...},
  mfaSettings: {...},
  loginSettings: {...},
});
web3auth.configureAdapter(openloginAdapter);

const web3authProvider = await web3auth.connectTo(
  WALLET_ADAPTERS.OPENLOGIN,
  {
    loginProvider: "google",
  }
);

// Use this provider to export the private key of the user

For Single Factor Auth Web SDK​

While using the SFA Web SDK, you need to pass the provider during the initialization of SDK, while calling the init() function.

const chainConfig = {
  chainId: "0x1",
  chainNamespace: CHAIN_NAMESPACES.OTHER,
  rpcTarget: "https://any-rpc-endpoint.com",
};

const web3authSfa = new Web3Auth({
  clientId, // Get your Client ID from the Web3Auth Dashboard
  chainConfig,
  web3AuthNetwork: "sapphire_mainnet",
  usePnPKey: false, // Setting this to true returns the same key as PnP Web SDK, By default, this SDK returns CoreKitKey.
});

const privateKeyProvider = new CommonPrivateKeyProvider(config: chainConfig);

web3authSfa.init(privateKeyProvider);

const web3authSfaprovider = await web3auth.connect({
  verifier: "web3auth-sfa-verifier", // e.g. `web3auth-sfa-verifier` replace with your verifier name, and it has to be on the same network passed in init().
  verifierId: "name@email.com", // e.g. `Yux1873xnibdui` or `name@email.com` replace with your verifier id(sub or email)'s value.
  idToken: "eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6IlRZT2dnXy01RU9FYmxhWS1WVlJZcVZhREFncHRuZktWNDUzNU1aUEMwdzAifQ.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.uoRbO9fvLyYEq3-X-osNlP4pda7aASKko0dm7EsmQvA-uq7cKFJWgAD8S9jC8ZogiEtJ6MRnjDYY8UdTwBL7mQ", // replace with your newly created unused JWT Token.
});

// use this provider to export the private key of the user

Usage​

On connection, you can use this provider as a private key provider to expose the user's private key in the frontend context

//Assuming the user is already logged in.
async getPrivateKey() {
    const privateKey = await web3authSfaprovider.request({
        method: "private_key"
    });
    //Do something with privateKey
}