How do I create my own account abstraction using starknetjs?

Create your account abstraction :

You are not limited to OZ or AX contracts; you can create your own contract for your wallet. It's the concept of Account Abstraction. You can customize entirely the wallet; for example :

• use a different concept of keys.
• Add a guardian to save your account.
• have the possibility to transfer ownership of the wallet.
• Add some administrators or a super-administrator.
• Whitelist of address for transfer.
• Multisig

The only limitation is your imagination...Here is an example of a customized wallet, including super administrator management, on a local starknet-devnet (launch starknet-devnet --seed 0 before using this script) :

import { Account, ec, json, stark, Provider, hash } from "starknet";
import axios from "axios";

and:

// connect provider
const provider = new Provider({ sequencer: { network: "http://127.0.0.1:5050" } });

// initialize existing predeployed account 0 of Devnet
const privateKey0 = "0xe3e70682c2094cac629f6fbed82c07cd";
const starkKeyPair0 = ec.getKeyPair(privateKey0);
const accountAddress0 = "0x7e00d496e324876bbc8531f2d9a82bf154d1a04a50218ee74cdd372f75a551a";
const account0 = new Account(provider, accountAddress0, starkKeyPair0);

// new account abstraction :
    // Generate public and private key pair.
const AAprivateKey = stark.randomAddress();
console.log('New account :\nprivateKey=', AAprivateKey);
const AAstarkKeyPair = ec.getKeyPair(AAprivateKey);
const AAstarkKeyPub = ec.getStarkKey(AAstarkKeyPair);
console.log('publicKey=', AAstarkKeyPub);

// declare the contract
const compiledAAaccount = json.parse(fs.readFileSync("./compiled_contracts/myAccountAbstraction.json").toString("ascii")
const AAaccountClashHass = "0x5139780c7ec8246e21a22e49f4fa0ce430237df4a4b241214a3a5a5c120120d";
const { transaction_hash: declTH, class_hash: decCH } = await account0.declare({ 
    classHash: AAaccountClashHass, 
    contract: compiledAAaccount 
});
console.log('Customized account class hash =', decCH);
await provider.waitForTransaction(declTH);

// Calculate future address of the account
const AAaccountConstructorCallData = stark.compileCalldata({
    super_admin_address: account0.address, 
    publicKey: AAstarkKeyPub 
});
const AAcontractAddress = hash.calculateContractAddressFromHash(
    AAstarkKeyPub, 
    AAaccountClashHass, 
    AAaccountConstructorCallData, 
    0
);
console.log('Precalculated account address=', AAcontractAddress);

// fund account address before account creation
const { data: answer } = await axios.post('http://127.0.0.1:5050/mint', { "address": AAcontractAddress, "amount": 50_000_000_000_000_000_000, "lite": true }, { headers: { "Content-Type": "application/json" } });
console.log('Answer mint =', answer);

// deploy account
const AAaccount = new Account(provider, AAcontractAddress, AAstarkKeyPair);
const { transaction_hash, contract_address } = await AAaccount.deployAccount({ 
    classHash: AAaccountClashHass, 
    constructorCalldata: AAaccountConstructorCallData, 
    addressSalt: AAstarkKeyPub 
});
await provider.waitForTransaction(transaction_hash);
console.log('✅ New customized account created.\n   address =', contract_address);