Smart Account Deployment

using Nethereum.AccountAbstraction.Extensions;
using Nethereum.Web3;

var web3 = new Web3(new Nethereum.Web3.Accounts.Account(privateKey), rpcUrl);

// Predict address without deploying
var address = await web3.CreateSmartAccount()
    .WithFactory(factoryAddress)
    .WithOwnerKey(privateKey)
    .WithSalt(0)
    .GetAddressAsync();

// Deploy and get ready-to-use service
var account = await web3.CreateSmartAccount()
    .WithFactory(factoryAddress)
    .WithOwnerKey(privateKey)
    .BuildAsync();

Console.WriteLine($"Deployed at: {account.Address}");
Console.WriteLine($"Is deployed: {await account.IsDeployedAsync()}");

Builder Methods

Load Existing Account

// Via builder
var account = await web3.CreateSmartAccount()
    .FromExisting(accountAddress)
    .BuildAsync();

// Shortcut
var account = await web3.GetSmartAccountAsync(accountAddress);

Lazy Deployment via InitCode

Deploy the account as part of the first UserOperation:

// Get init code from builder
var builder = web3.CreateSmartAccount()
    .WithFactory(factoryAddress)
    .WithOwnerKey(privateKey);

var initCode = await builder.GetInitCodeAsync();
var address = await builder.GetAddressAsync();

// Set on UserOperation
var userOp = new UserOperation
{
    Sender = address,
    InitCode = initCode,
    // ... other fields
};

Automatic with AAContractHandler

erc20Service.ChangeContractHandlerToAA(
    counterfactualAddress, privateKey, bundlerUrl, entryPointAddress,
    new FactoryConfig
    {
        FactoryAddress = factoryAddress,
        Owner = ownerAddress,
        Salt = 0
    });

// First call deploys + executes atomically
var receipt = await erc20Service.TransferRequestAndWaitForReceiptAsync(
    new TransferFunction { To = recipient, Value = amount });

EntryPoint Deposits

var deposit = await account.GetDepositAsync();
await account.AddDepositAsync(Web3.Convert.ToWei(0.1m));
await account.WithdrawDepositToAsync(withdrawAddress, amount);

EntryPoint Versions

Use EntryPointAddresses.Latest (V09) for new deployments. The account is bound to the EntryPoint version at deploy time.

Common Mistakes

• Not funding the counterfactual address before the first UserOperation
• Changing the salt between prediction and deployment (produces different address)
• Wrong factory address between prediction and deployment
• Wrong EntryPoint — account is bound to one version

For full documentation, see: https://docs.nethereum.com/docs/account-abstraction/guide-smart-account-deployment