ERC-6492 Predeploy Signature Verification (#105)

Thirdweb.Tests/Thirdweb.Wallets/Thirdweb.SmartWallet.Tests.cs

@@ -144,8 +144,15 @@ public async Task GetAddress_WithOverride()
     public async Task PersonalSign() // This is the only different signing mechanism for smart wallets, also tests isValidSignature
     {
         var account = await this.GetSmartAccount();
+
+        // ERC-6942 Verification
         var sig = await account.PersonalSign("Hello, world!");
         Assert.NotNull(sig);
+
+        // Raw EIP-1271 Verification
+        await account.ForceDeploy();
+        var sig2 = await account.PersonalSign("Hello, world!");
+        Assert.NotNull(sig2);
     }
 
     [Fact(Timeout = 120000)]

Thirdweb/Thirdweb.Contracts/ThirdwebContract.cs

@@ -102,28 +102,12 @@ public static async Task<string> FetchAbi(ThirdwebClient client, string address,
     public static async Task<T> Read<T>(ThirdwebContract contract, string method, params object[] parameters)
     {
         var rpc = ThirdwebRPC.GetRpcInstance(contract.Client, contract.Chain);
-        var contractRaw = new Contract(null, contract.Abi, contract.Address);
-
-        var function = GetFunctionMatchSignature(contractRaw, method, parameters);
-        if (function == null)
-        {
-            if (method.Contains('('))
-            {
-                var canonicalSignature = ExtractCanonicalSignature(method);
-                var selector = Nethereum.Util.Sha3Keccack.Current.CalculateHash(canonicalSignature)[..8];
-                function = contractRaw.GetFunctionBySignature(selector);
-            }
-            else
-            {
-                throw new ArgumentException("Method signature not found in contract ABI.");
-            }
-        }
-
-        var data = function.GetData(parameters);
+        (var data, var function) = EncodeFunctionCall(contract, method, parameters);
         var resultData = await rpc.SendRequestAsync<string>("eth_call", new { to = contract.Address, data }, "latest").ConfigureAwait(false);
 
         if ((typeof(T).IsGenericType && typeof(T).GetGenericTypeDefinition() == typeof(List<>)) || typeof(T).IsArray)
         {
+            var contractRaw = new Contract(null, contract.Abi, contract.Address);
             var functionAbi = contractRaw.ContractBuilder.ContractABI.FindFunctionABIFromInputData(data);
             var decoder = new FunctionCallDecoder();
             var outputList = new FunctionCallDecoder().DecodeDefaultData(resultData.HexToBytes(), functionAbi.OutputParameters);
@@ -168,23 +152,7 @@ public static async Task<T> Read<T>(ThirdwebContract contract, string method, pa
     /// <returns>A prepared transaction.</returns>
     public static async Task<ThirdwebTransaction> Prepare(IThirdwebWallet wallet, ThirdwebContract contract, string method, BigInteger weiValue, params object[] parameters)
     {
-        var contractRaw = new Contract(null, contract.Abi, contract.Address);
-        var function = GetFunctionMatchSignature(contractRaw, method, parameters);
-        if (function == null)
-        {
-            if (method.Contains('('))
-            {
-                var canonicalSignature = ExtractCanonicalSignature(method);
-                var selector = Nethereum.Util.Sha3Keccack.Current.CalculateHash(canonicalSignature)[..8];
-                function = contractRaw.GetFunctionBySignature(selector);
-            }
-            else
-            {
-                throw new ArgumentException("Method signature not found in contract ABI.");
-            }
-        }
-
-        var data = function.GetData(parameters);
+        var data = contract.CreateCallData(method, parameters);
         var transaction = new ThirdwebTransactionInput(chainId: contract.Chain)
         {
             To = contract.Address,
@@ -210,6 +178,26 @@ public static async Task<ThirdwebTransactionReceipt> Write(IThirdwebWallet walle
         return await ThirdwebTransaction.SendAndWaitForTransactionReceipt(thirdwebTx).ConfigureAwait(false);
     }
 
+    internal static (string callData, Function function) EncodeFunctionCall(ThirdwebContract contract, string method, params object[] parameters)
+    {
+        var contractRaw = new Contract(null, contract.Abi, contract.Address);
+        var function = GetFunctionMatchSignature(contractRaw, method, parameters);
+        if (function == null)
+        {
+            if (method.Contains('('))
+            {
+                var canonicalSignature = ExtractCanonicalSignature(method);
+                var selector = Nethereum.Util.Sha3Keccack.Current.CalculateHash(canonicalSignature)[..8];
+                function = contractRaw.GetFunctionBySignature(selector);
+            }
+            else
+            {
+                throw new ArgumentException("Method signature not found in contract ABI.");
+            }
+        }
+        return (function.GetData(parameters), function);
+    }
+
     /// <summary>
     /// Gets a function matching the specified signature from the contract.
     /// </summary>

Thirdweb/Thirdweb.Extensions/ThirdwebExtensions.cs

@@ -9,6 +9,13 @@ public static class ThirdwebExtensions
 {
     #region Common
 
+    /// <summary>
+    /// Returns whether the contract supports the specified interface.
+    /// </summary>
+    /// <param name="contract">The contract instance.</param>
+    /// <param name="interfaceId">The interface ID to check.</param>
+    /// <returns>A task that represents the asynchronous operation. The task result contains a boolean indicating whether the contract supports the interface.</returns>
+    /// <exception cref="ArgumentNullException"></exception>
     public static async Task<bool> SupportsInterface(this ThirdwebContract contract, string interfaceId)
     {
         if (contract == null)
@@ -19,6 +26,19 @@ public static async Task<bool> SupportsInterface(this ThirdwebContract contract,
         return await ThirdwebContract.Read<bool>(contract, "supportsInterface", interfaceId.HexToBytes());
     }
 
+    /// <summary>
+    /// Encodes the function call for the specified method and parameters.
+    /// </summary>
+    /// <param name="contract">The contract instance.</param>
+    /// <param name="method">The method to call.</param>
+    /// <param name="parameters">The parameters for the method.</param>
+    /// <returns>The generated calldata.</returns>
+    public static string CreateCallData(this ThirdwebContract contract, string method, params object[] parameters)
+    {
+        (var data, _) = ThirdwebContract.EncodeFunctionCall(contract, method, parameters);
+        return data;
+    }
+
     /// <summary>
     /// Reads data from the contract using the specified method.
     /// </summary>

Thirdweb/Thirdweb.RPC/ThirdwebRPC.cs

@@ -77,7 +77,7 @@ public async Task<TResponse> SendRequestAsync<TResponse>(string method, params o
     {
         lock (this._cacheLock)
         {
-            var cacheKey = GetCacheKey(method, parameters);
+            var cacheKey = GetCacheKey(this._rpcUrl.ToString(), method, parameters);
             if (this._cache.TryGetValue(cacheKey, out var cachedItem) && (DateTime.Now - cachedItem.Timestamp) < this._cacheDuration)
             {
                 if (cachedItem.Response is TResponse cachedResponse)
@@ -121,7 +121,7 @@ public async Task<TResponse> SendRequestAsync<TResponse>(string method, params o
         {
             lock (this._cacheLock)
             {
-                var cacheKey = GetCacheKey(method, parameters);
+                var cacheKey = GetCacheKey(this._rpcUrl.ToString(), method, parameters);
                 this._cache[cacheKey] = (response, DateTime.Now);
             }
             return response;
@@ -133,7 +133,7 @@ public async Task<TResponse> SendRequestAsync<TResponse>(string method, params o
                 var deserializedResponse = JsonConvert.DeserializeObject<TResponse>(JsonConvert.SerializeObject(result));
                 lock (this._cacheLock)
                 {
-                    var cacheKey = GetCacheKey(method, parameters);
+                    var cacheKey = GetCacheKey(this._rpcUrl.ToString(), method, parameters);
                     this._cache[cacheKey] = (deserializedResponse, DateTime.Now);
                 }
                 return deserializedResponse;
@@ -238,10 +238,12 @@ private async Task SendBatchAsync(List<RpcRequest> batch)
         }
     }
 
-    private static string GetCacheKey(string method, params object[] parameters)
+    private static string GetCacheKey(string rpcUrl, string method, params object[] parameters)
     {
         var keyBuilder = new StringBuilder();
 
+        _ = keyBuilder.Append(rpcUrl);
+
         _ = keyBuilder.Append(method);
 
         foreach (var param in parameters)

Thirdweb/Thirdweb.Utils/Constants.cs

@@ -16,6 +16,12 @@ public static class Constants
     public const string DEFAULT_FACTORY_ADDRESS_V06 = "0x85e23b94e7F5E9cC1fF78BCe78cfb15B81f0DF00";
     public const string DEFAULT_FACTORY_ADDRESS_V07 = "0x4bE0ddfebcA9A5A4a617dee4DeCe99E7c862dceb";
 
+    public const string EIP_1271_MAGIC_VALUE = "0x1626ba7e00000000000000000000000000000000000000000000000000000000";
+    public const string ERC_6492_MAGIC_VALUE = "0x6492649264926492649264926492649264926492649264926492649264926492";
+    public const string MULTICALL3_ADDRESS = "0xcA11bde05977b3631167028862bE2a173976CA11";
+    public const string MULTICALL3_ABI =
+        /*lang=json,strict*/
+        "[{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"blockNumber\",\"internalType\":\"uint256\"},{\"type\":\"bytes[]\",\"name\":\"returnData\",\"internalType\":\"bytes[]\"}],\"name\":\"aggregate\",\"inputs\":[{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]},{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"tuple[]\",\"name\":\"returnData\",\"internalType\":\"struct Multicall3.Result[]\",\"components\":[{\"type\":\"bool\",\"name\":\"success\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"returnData\",\"internalType\":\"bytes\"}]}],\"name\":\"aggregate3\",\"inputs\":[{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call3[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bool\",\"name\":\"allowFailure\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]},{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"tuple[]\",\"name\":\"returnData\",\"internalType\":\"struct Multicall3.Result[]\",\"components\":[{\"type\":\"bool\",\"name\":\"success\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"returnData\",\"internalType\":\"bytes\"}]}],\"name\":\"aggregate3Value\",\"inputs\":[{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call3Value[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bool\",\"name\":\"allowFailure\",\"internalType\":\"bool\"},{\"type\":\"uint256\",\"name\":\"value\",\"internalType\":\"uint256\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]},{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"blockNumber\",\"internalType\":\"uint256\"},{\"type\":\"bytes32\",\"name\":\"blockHash\",\"internalType\":\"bytes32\"},{\"type\":\"tuple[]\",\"name\":\"returnData\",\"internalType\":\"struct Multicall3.Result[]\",\"components\":[{\"type\":\"bool\",\"name\":\"success\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"returnData\",\"internalType\":\"bytes\"}]}],\"name\":\"blockAndAggregate\",\"inputs\":[{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"basefee\",\"internalType\":\"uint256\"}],\"name\":\"getBasefee\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"bytes32\",\"name\":\"blockHash\",\"internalType\":\"bytes32\"}],\"name\":\"getBlockHash\",\"inputs\":[{\"type\":\"uint256\",\"name\":\"blockNumber\",\"internalType\":\"uint256\"}]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"blockNumber\",\"internalType\":\"uint256\"}],\"name\":\"getBlockNumber\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"chainid\",\"internalType\":\"uint256\"}],\"name\":\"getChainId\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"address\",\"name\":\"coinbase\",\"internalType\":\"address\"}],\"name\":\"getCurrentBlockCoinbase\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"difficulty\",\"internalType\":\"uint256\"}],\"name\":\"getCurrentBlockDifficulty\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"gaslimit\",\"internalType\":\"uint256\"}],\"name\":\"getCurrentBlockGasLimit\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"timestamp\",\"internalType\":\"uint256\"}],\"name\":\"getCurrentBlockTimestamp\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"balance\",\"internalType\":\"uint256\"}],\"name\":\"getEthBalance\",\"inputs\":[{\"type\":\"address\",\"name\":\"addr\",\"internalType\":\"address\"}]},{\"type\":\"function\",\"stateMutability\":\"view\",\"outputs\":[{\"type\":\"bytes32\",\"name\":\"blockHash\",\"internalType\":\"bytes32\"}],\"name\":\"getLastBlockHash\",\"inputs\":[]},{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"tuple[]\",\"name\":\"returnData\",\"internalType\":\"struct Multicall3.Result[]\",\"components\":[{\"type\":\"bool\",\"name\":\"success\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"returnData\",\"internalType\":\"bytes\"}]}],\"name\":\"tryAggregate\",\"inputs\":[{\"type\":\"bool\",\"name\":\"requireSuccess\",\"internalType\":\"bool\"},{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]},{\"type\":\"function\",\"stateMutability\":\"payable\",\"outputs\":[{\"type\":\"uint256\",\"name\":\"blockNumber\",\"internalType\":\"uint256\"},{\"type\":\"bytes32\",\"name\":\"blockHash\",\"internalType\":\"bytes32\"},{\"type\":\"tuple[]\",\"name\":\"returnData\",\"internalType\":\"struct Multicall3.Result[]\",\"components\":[{\"type\":\"bool\",\"name\":\"success\",\"internalType\":\"bool\"},{\"type\":\"bytes\",\"name\":\"returnData\",\"internalType\":\"bytes\"}]}],\"name\":\"tryBlockAndAggregate\",\"inputs\":[{\"type\":\"bool\",\"name\":\"requireSuccess\",\"internalType\":\"bool\"},{\"type\":\"tuple[]\",\"name\":\"calls\",\"internalType\":\"struct Multicall3.Call[]\",\"components\":[{\"type\":\"address\",\"name\":\"target\",\"internalType\":\"address\"},{\"type\":\"bytes\",\"name\":\"callData\",\"internalType\":\"bytes\"}]}]}]";
     public const string REDIRECT_HTML =
         "<html lang=\"en\" style=\"background-color:#050505;color:#fff\"><body style=\"position:relative;display:flex;flex-direction:column;height:100%;width:100%;margin:0;justify-content:center;align-items:center;text-align:center;overflow:hidden\"><div style=\"position:fixed;top:0;left:50%;background-image:radial-gradient(ellipse at center,hsl(260deg 78% 35% / 40%),transparent 60%);width:2400px;height:1400px;transform:translate(-50%,-50%);z-index:-1\"></div><h1>Authentication Complete!</h1><h2>You may close this tab now and return to the game</h2></body></html>";
 

Thirdweb/Thirdweb.Utils/Utils.cs

@@ -4,6 +4,7 @@
 using System.Text;
 using System.Text.RegularExpressions;
 using ADRaffy.ENSNormalize;
+using Nethereum.ABI;
 using Nethereum.ABI.EIP712;
 using Nethereum.ABI.FunctionEncoding;
 using Nethereum.ABI.FunctionEncoding.Attributes;
@@ -87,8 +88,7 @@ public static byte[] HashPrefixedMessage(this byte[] messageBytes)
     /// <returns>The hashed message.</returns>
     public static string HashPrefixedMessage(this string message)
     {
-        var signer = new EthereumMessageSigner();
-        return signer.HashPrefixedMessage(Encoding.UTF8.GetBytes(message)).ToHex(true);
+        return HashPrefixedMessage(Encoding.UTF8.GetBytes(message)).BytesToHex();
     }
 
     /// <summary>
@@ -1020,4 +1020,18 @@ static void StringifyLargeNumbers(JToken token)
 
         return jObject.ToString();
     }
+
+    /// <summary>
+    /// Serializes a signature for use with ERC-6492. The signature must be generated by a signer for an ERC-4337 Account Factory account with counterfactual deployment addresses.
+    /// </summary>
+    /// <param name="address">The ERC-4337 Account Factory address</param>
+    /// <param name="data">Account deployment calldata (if not deployed) for counterfactual verification</param>
+    /// <param name="signature">The original signature</param>
+    /// <returns>The serialized signature hex string.</returns>
+    public static string SerializeErc6492Signature(string address, byte[] data, byte[] signature)
+    {
+        var encoder = new ABIEncode();
+        var encodedParams = encoder.GetABIEncoded(new ABIValue("address", address), new ABIValue("bytes", data), new ABIValue("bytes", signature));
+        return HexConcat(encodedParams.BytesToHex(), Constants.ERC_6492_MAGIC_VALUE);
+    }
 }