Unable to create AptosAccount using Typescript (INVALID_AUTH_KEY)

[banool]

Originally from Stack Overflow.

I am trying to create a token collection using the Aptos Typescript SDK.

const account = new AptosAccount(Uint8Array.from(Buffer.from(PRIVATE_KEY)), ACCOUNT_ADDR);

await tokenClient.createCollection(
        account,
        "A test collection 1",
        "A test collection",
        "https://google.com",
    );

But I get the following error:

ApiError2: {"message":"Invalid transaction: Type: Validation Code: INVALID_AUTH_KEY","error_code":"vm_error","vm_error_code":2}

What am I doing wrong?

Tried replicating the Aptos official example but instead of creating a new account, I want to use an existing funded account.

[banool]

Let's say you have a private key as a string, you can do it like this:

// Create a private key instance for the Ed25519 scheme.
const privateKey = new Ed25519PrivateKey("0xdcaf65ead38f7cf0eb4f81961f8fc7f9b7f1e2f45e2d4a6da0dbef85f46f6057");
// Or for the Secp256k1 scheme
const privateKey = new Secp256k1PrivateKey("0xdcaf65ead38f7cf0eb4f81961f8fc7f9b7f1e2f45e2d4a6da0dbef85f46f6057");

// Create the account. Note, this only works for accounts that haven't had their authentication key rotated.
const account = await Account.fromPrivateKey({ privateKey });

If you aren't sure which scheme it is, you can use the following code:

const aptos = new Aptos();
const account = await aptos.deriveAccountFromPrivateKey({ privateKey });

Note, this makes network calls to figure out the scheme, so the previous code is preferred.