Connect to multiple chains simultaneously

[yurayavorski]

I'm using web3auth JS SDK. I have found the example of how to implement switching to different chains. But I need to have access to multiple chains at the same time (e.g. to list user assets from multiple chains). Is there a way to achieve this?

[YZhenY]

You can export the key from the web3auth provider and instantiate your own provider for the different chains needed

[yurayavorski]

Could you please provide a code example, I don't quite understand how to achieve this.

[yashovardhan]

Hey @yurayavorski

We don't have an example for this case, but I can explain to you how the code will look like. You can use this private key provider: https://web3auth.io/docs/sdk/web/providers/other to get the private key of the user. Now suppose I want to use it for StarkEx and Tezos. Now I will make two different functions for getting StarkEx keys and Tezos keys like these:

• StarkEx

getStarkAccount = async (): Promise<any> => {
    try {
      const privateKey = await this.provider.request({ method: "private_key" });
      const keyPair = starkwareCrypto.ec.keyFromPrivate(privateKey, "hex");
      const account = starkwareCrypto.ec.keyFromPublic(keyPair.getPublic(true, "hex"), "hex");
      return account;
    } catch (error) {
      return error;
    }
  };

  getStarkKey = async (): Promise<string | undefined> => {
    try {
      const account = await this.getStarkAccount();
      const publicKeyX = account.pub.getX().toString("hex");
      return publicKeyX;
    } catch (error) {
      return error as string;
    }
  };

• Tezos

getTezosKeyPair = async (): Promise<any> => {
    try {
      const privateKey = (await this.provider.request({ method: "private_key" })) as string;
      const keyPair = tezosCrypto.utils.seedToKeyPair(hex2buf(privateKey));
      return keyPair;
    } catch (error) {
      return error;
    }
  };

Afterwards, you can use these keys for each blockchain to make calls accordingly. You can check our StarkEx and Tezos blockchain pages to know how to make calls.

[shahbaz17]

Hey @yurayavorski

Please see https://github.com/Web3Auth/examples/tree/main/web-modal-sdk/multi-chain