EIP-7702 Integration (Experimental)

Integrates authorizationList for any transactions. This EIP essentially allows you to set code to an EOA, unlocking a world of possibilities to enhance their functionality.

The best way to understand it outside of reading the EIP is looking at the example below; to preface it: we sign an authorization using the wallet we want to set code to. Another wallet sends a transaction with said authorization passed in, essentially activating it. The authority wallet now has code set to it pointing to an (insecure) Delegation contract in this case, which allows any wallet to execute any call through it on behalf of the authority. In this example, we call the wallet executing both the authorization and the claim transaction afterwards, the exectuor.

An authority may execute its own authorization, the only difference is internal whereby the authorization nonce is incremented by 1.

// Chain and contract addresses
var chainWith7702 = 911867;
var erc20ContractAddress = "0xAA462a5BE0fc5214507FDB4fB2474a7d5c69065b"; // Fake ERC20
var delegationContractAddress = "0x654F42b74885EE6803F403f077bc0409f1066c58"; // BatchCallDelegation
 
// Initialize contracts normally
var erc20Contract = await ThirdwebContract.Create(client: client, address: erc20ContractAddress, chain: chainWith7702);
var delegationContract = await ThirdwebContract.Create(client: client, address: delegationContractAddress, chain: chainWith7702);
 
// Initialize a (to-be) 7702 EOA
var eoaWallet = await PrivateKeyWallet.Generate(client);
var eoaWalletAddress = await eoaWallet.GetAddress();
Console.WriteLine($"EOA address: {eoaWalletAddress}");
 
// Initialize another wallet, the "executor" that will hit the eoa's (to-be) execute function
var executorWallet = await PrivateKeyWallet.Generate(client);
var executorWalletAddress = await executorWallet.GetAddress();
Console.WriteLine($"Executor address: {executorWalletAddress}");
 
// Fund the executor wallet
var fundingWallet = await PrivateKeyWallet.Create(client, privateKey);
var fundingHash = (await fundingWallet.Transfer(chainWith7702, executorWalletAddress, BigInteger.Parse("0.001".ToWei()))).TransactionHash;
Console.WriteLine($"Funded Executor Wallet: {fundingHash}");
 
// Sign the authorization to make it point to the delegation contract
var authorization = await eoaWallet.SignAuthorization(chainId: chainWith7702, contractAddress: delegationContractAddress, willSelfExecute: false);
Console.WriteLine($"Authorization: {JsonConvert.SerializeObject(authorization, Formatting.Indented)}");
 
// Execute the delegation
var tx = await ThirdwebTransaction.Create(executorWallet, new ThirdwebTransactionInput(chainId: chainWith7702, to: executorWalletAddress, authorization: authorization));
var hash = (await ThirdwebTransaction.SendAndWaitForTransactionReceipt(tx)).TransactionHash;
Console.WriteLine($"Authorization execution transaction hash: {hash}");
 
// Prove that code has been deployed to the eoa
var rpc = ThirdwebRPC.GetRpcInstance(client, chainWith7702);
var code = await rpc.SendRequestAsync<string>("eth_getCode", eoaWalletAddress, "latest");
Console.WriteLine($"EOA code: {code}");
 
// Log erc20 balance of executor before the claim
var executorBalanceBefore = await erc20Contract.ERC20_BalanceOf(executorWalletAddress);
Console.WriteLine($"Executor balance before: {executorBalanceBefore}");
 
// Prepare the claim call
var claimCallData = erc20Contract.CreateCallData(
    "claim",
    new object[]
    {
        executorWalletAddress, // receiver
        100, // quantity
        Constants.NATIVE_TOKEN_ADDRESS, // currency
        0, // pricePerToken
        new object[] { Array.Empty<byte>(), BigInteger.Zero, BigInteger.Zero, Constants.ADDRESS_ZERO }, // allowlistProof
        Array.Empty<byte>() // data
    }
);
 
// Embed the claim call in the execute call
var executeCallData = delegationContract.CreateCallData(
    method: "execute",
    parameters: new object[]
    {
        new List<Thirdweb.Console.Call>
        {
            new()
            {
                Data = claimCallData.HexToBytes(),
                To = erc20ContractAddress,
                Value = BigInteger.Zero
            }
        }
    }
);
 
// Execute from the executor wallet targeting the eoa which is pointing to the delegation contract
var tx2 = await ThirdwebTransaction.Create(executorWallet, new ThirdwebTransactionInput(chainId: chainWith7702, to: eoaWalletAddress, data: executeCallData));
var hash2 = (await ThirdwebTransaction.SendAndWaitForTransactionReceipt(tx2)).TransactionHash;
Console.WriteLine($"Token claim transaction hash: {hash2}");
 
// Log erc20 balance of executor after the claim
var executorBalanceAfter = await erc20Contract.ERC20_BalanceOf(executorWalletAddress);
Console.WriteLine($"Executor balance after: {executorBalanceAfter}");

Note that for the time being this only works on 7702-enabled chains such as Odyssey and the feature has only been integrated with PrivateKeyWallet.