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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Linq; |
| 4 | +using System.Net.Http; |
| 5 | +using System.Numerics; |
| 6 | +using System.Text; |
| 7 | +using System.Threading.Tasks; |
| 8 | +using Nethereum.ABI.EIP712; |
| 9 | +using Nethereum.Hex.HexTypes; |
| 10 | +using Nethereum.RPC.Eth.DTOs; |
| 11 | +using Nethereum.RPC.HostWallet; |
| 12 | +using Newtonsoft.Json; |
| 13 | +using UnityEngine; |
| 14 | + |
| 15 | +namespace Thirdweb.Unity |
| 16 | +{ |
| 17 | + public class MetaMaskWallet : IThirdwebWallet |
| 18 | + { |
| 19 | + public ThirdwebClient Client => _client; |
| 20 | + public ThirdwebAccountType AccountType => ThirdwebAccountType.ExternalAccount; |
| 21 | + |
| 22 | + private static ThirdwebClient _client; |
| 23 | + |
| 24 | + protected MetaMaskWallet() { } |
| 25 | + |
| 26 | + public static async Task<MetaMaskWallet> Create(ThirdwebClient client, BigInteger activeChainId) |
| 27 | + { |
| 28 | + _client = client; |
| 29 | + |
| 30 | + if (Application.platform != RuntimePlatform.WebGLPlayer || Application.isEditor) |
| 31 | + { |
| 32 | + throw new Exception("MetaMaskWallet is only available in WebGL Builds. Please use a different wallet provider on native platforms."); |
| 33 | + } |
| 34 | + |
| 35 | + var metaMaskInstance = WebGLMetaMask.Instance; |
| 36 | + |
| 37 | + if (metaMaskInstance.IsConnected() && !string.IsNullOrEmpty(metaMaskInstance.GetAddress())) |
| 38 | + { |
| 39 | + ThirdwebDebug.Log("MetaMask already initialized."); |
| 40 | + await EnsureCorrectNetwork(activeChainId); |
| 41 | + return new MetaMaskWallet(); |
| 42 | + } |
| 43 | + |
| 44 | + if (metaMaskInstance.IsMetaMaskAvailable()) |
| 45 | + { |
| 46 | + ThirdwebDebug.Log("MetaMask is available. Enabling Ethereum..."); |
| 47 | + var isEnabled = await metaMaskInstance.EnableEthereumAsync(); |
| 48 | + ThirdwebDebug.Log($"Ethereum enabled: {isEnabled}"); |
| 49 | + if (isEnabled && !string.IsNullOrEmpty(metaMaskInstance.GetAddress())) |
| 50 | + { |
| 51 | + ThirdwebDebug.Log("MetaMask initialized successfully."); |
| 52 | + await EnsureCorrectNetwork(activeChainId); |
| 53 | + return new MetaMaskWallet(); |
| 54 | + } |
| 55 | + else |
| 56 | + { |
| 57 | + throw new Exception("MetaMask initialization failed or address is empty."); |
| 58 | + } |
| 59 | + } |
| 60 | + else |
| 61 | + { |
| 62 | + throw new Exception("MetaMask is not available."); |
| 63 | + } |
| 64 | + } |
| 65 | + |
| 66 | + #region IThirdwebWallet |
| 67 | + |
| 68 | + public Task<string> EthSign(byte[] rawMessage) |
| 69 | + { |
| 70 | + throw new NotImplementedException("MetaMask does not support signing raw messages."); |
| 71 | + } |
| 72 | + |
| 73 | + public Task<string> EthSign(string message) |
| 74 | + { |
| 75 | + throw new NotImplementedException("MetaMask does not support signing messages."); |
| 76 | + } |
| 77 | + |
| 78 | + public Task<string> GetAddress() |
| 79 | + { |
| 80 | + return Task.FromResult(WebGLMetaMask.Instance.GetAddress()); |
| 81 | + } |
| 82 | + |
| 83 | + public Task<bool> IsConnected() |
| 84 | + { |
| 85 | + return Task.FromResult(WebGLMetaMask.Instance.IsConnected()); |
| 86 | + } |
| 87 | + |
| 88 | + public Task<string> PersonalSign(byte[] rawMessage) |
| 89 | + { |
| 90 | + if (rawMessage == null) |
| 91 | + { |
| 92 | + throw new ArgumentNullException(nameof(rawMessage), "Message to sign cannot be null."); |
| 93 | + } |
| 94 | + |
| 95 | + var message = Encoding.UTF8.GetString(rawMessage); |
| 96 | + return PersonalSign(message); |
| 97 | + } |
| 98 | + |
| 99 | + public async Task<string> PersonalSign(string message) |
| 100 | + { |
| 101 | + if (string.IsNullOrEmpty(message)) |
| 102 | + { |
| 103 | + throw new ArgumentNullException(nameof(message), "Message to sign cannot be null or empty."); |
| 104 | + } |
| 105 | + |
| 106 | + var rpcRequest = new RpcRequest { Method = "personal_sign", Params = new object[] { message, WebGLMetaMask.Instance.GetAddress() } }; |
| 107 | + return await WebGLMetaMask.Instance.RequestAsync<string>(rpcRequest); |
| 108 | + } |
| 109 | + |
| 110 | + public async Task<string> SendTransaction(ThirdwebTransactionInput transaction) |
| 111 | + { |
| 112 | + await EnsureCorrectNetwork(transaction.ChainId); |
| 113 | + |
| 114 | + var rpcRequest = new RpcRequest |
| 115 | + { |
| 116 | + Method = "eth_sendTransaction", |
| 117 | + Params = new object[] |
| 118 | + { |
| 119 | + new TransactionInput() |
| 120 | + { |
| 121 | + Nonce = transaction.Nonce, |
| 122 | + From = transaction.From, |
| 123 | + To = transaction.To, |
| 124 | + Gas = transaction.Gas, |
| 125 | + GasPrice = transaction.GasPrice, |
| 126 | + Value = transaction.Value, |
| 127 | + Data = transaction.Data, |
| 128 | + MaxFeePerGas = transaction.MaxFeePerGas, |
| 129 | + MaxPriorityFeePerGas = transaction.MaxPriorityFeePerGas, |
| 130 | + ChainId = transaction.ChainId, |
| 131 | + } |
| 132 | + } |
| 133 | + }; |
| 134 | + return await WebGLMetaMask.Instance.RequestAsync<string>(rpcRequest); |
| 135 | + } |
| 136 | + |
| 137 | + public Task<string> SignTransaction(ThirdwebTransactionInput transaction) |
| 138 | + { |
| 139 | + throw new NotImplementedException("Offline transaction signing is not supported by MetaMask."); |
| 140 | + } |
| 141 | + |
| 142 | + public async Task<string> SignTypedDataV4(string json) |
| 143 | + { |
| 144 | + if (string.IsNullOrEmpty(json)) |
| 145 | + { |
| 146 | + throw new ArgumentNullException(nameof(json), "Json to sign cannot be null."); |
| 147 | + } |
| 148 | + |
| 149 | + var rpcRequest = new RpcRequest { Method = "eth_signTypedData_v4", Params = new object[] { await GetAddress(), json } }; |
| 150 | + return await WebGLMetaMask.Instance.RequestAsync<string>(rpcRequest); |
| 151 | + } |
| 152 | + |
| 153 | + public Task<string> SignTypedDataV4<T, TDomain>(T data, TypedData<TDomain> typedData) |
| 154 | + where TDomain : IDomain |
| 155 | + { |
| 156 | + if (data == null) |
| 157 | + { |
| 158 | + throw new ArgumentNullException(nameof(data), "Data to sign cannot be null."); |
| 159 | + } |
| 160 | + |
| 161 | + var json = typedData.ToJson(data); |
| 162 | + return SignTypedDataV4(json); |
| 163 | + } |
| 164 | + |
| 165 | + public virtual async Task<string> Authenticate( |
| 166 | + string domain, |
| 167 | + BigInteger chainId, |
| 168 | + string authPayloadPath = "/auth/payload", |
| 169 | + string authLoginPath = "/auth/login", |
| 170 | + IThirdwebHttpClient httpClientOverride = null |
| 171 | + ) |
| 172 | + { |
| 173 | + await EnsureCorrectNetwork(chainId); |
| 174 | + |
| 175 | + var payloadURL = domain + authPayloadPath; |
| 176 | + var loginURL = domain + authLoginPath; |
| 177 | + |
| 178 | + var payloadBodyRaw = new { address = await GetAddress(), chainId = chainId.ToString() }; |
| 179 | + var payloadBody = JsonConvert.SerializeObject(payloadBodyRaw); |
| 180 | + |
| 181 | + var httpClient = httpClientOverride ?? _client.HttpClient; |
| 182 | + |
| 183 | + var payloadContent = new StringContent(payloadBody, Encoding.UTF8, "application/json"); |
| 184 | + var payloadResponse = await httpClient.PostAsync(payloadURL, payloadContent); |
| 185 | + _ = payloadResponse.EnsureSuccessStatusCode(); |
| 186 | + var payloadString = await payloadResponse.Content.ReadAsStringAsync(); |
| 187 | + |
| 188 | + var loginBodyRaw = JsonConvert.DeserializeObject<LoginPayload>(payloadString); |
| 189 | + var payloadToSign = Utils.GenerateSIWE(loginBodyRaw.payload); |
| 190 | + |
| 191 | + loginBodyRaw.signature = await PersonalSign(payloadToSign); |
| 192 | + var loginBody = JsonConvert.SerializeObject(new { payload = loginBodyRaw }); |
| 193 | + |
| 194 | + var loginContent = new StringContent(loginBody, Encoding.UTF8, "application/json"); |
| 195 | + var loginResponse = await httpClient.PostAsync(loginURL, loginContent); |
| 196 | + _ = loginResponse.EnsureSuccessStatusCode(); |
| 197 | + var responseString = await loginResponse.Content.ReadAsStringAsync(); |
| 198 | + return responseString; |
| 199 | + } |
| 200 | + |
| 201 | + public Task<string> RecoverAddressFromEthSign(string message, string signature) |
| 202 | + { |
| 203 | + throw new NotImplementedException(); |
| 204 | + } |
| 205 | + |
| 206 | + public Task<string> RecoverAddressFromPersonalSign(string message, string signature) |
| 207 | + { |
| 208 | + throw new NotImplementedException(); |
| 209 | + } |
| 210 | + |
| 211 | + public Task<string> RecoverAddressFromTypedDataV4<T, TDomain>(T data, TypedData<TDomain> typedData, string signature) |
| 212 | + where TDomain : IDomain |
| 213 | + { |
| 214 | + throw new NotImplementedException(); |
| 215 | + } |
| 216 | + |
| 217 | + #endregion |
| 218 | + |
| 219 | + #region Network Switching |
| 220 | + |
| 221 | + public static async Task EnsureCorrectNetwork(BigInteger chainId) |
| 222 | + { |
| 223 | + if (WebGLMetaMask.Instance.GetActiveChainId() != chainId) |
| 224 | + { |
| 225 | + await AddNetwork(chainId); |
| 226 | + if (WebGLMetaMask.Instance.GetActiveChainId() == chainId) |
| 227 | + return; |
| 228 | + await SwitchNetwork(chainId); |
| 229 | + } |
| 230 | + } |
| 231 | + |
| 232 | + private static async Task SwitchNetwork(BigInteger chainId) |
| 233 | + { |
| 234 | + var switchEthereumChainParameter = new SwitchEthereumChainParameter { ChainId = new HexBigInteger(chainId) }; |
| 235 | + var rpcRequest = new RpcRequest { Method = "wallet_switchEthereumChain", Params = new object[] { switchEthereumChainParameter } }; |
| 236 | + _ = await WebGLMetaMask.Instance.RequestAsync<string>(rpcRequest); |
| 237 | + } |
| 238 | + |
| 239 | + private static async Task AddNetwork(BigInteger chainId) |
| 240 | + { |
| 241 | + var twChainData = await Utils.FetchThirdwebChainDataAsync(_client, chainId); |
| 242 | + var addEthereumChainParameter = new AddEthereumChainParameter |
| 243 | + { |
| 244 | + ChainId = new HexBigInteger(chainId), |
| 245 | + BlockExplorerUrls = twChainData.Explorers.Select(e => e.Url).ToList(), |
| 246 | + ChainName = twChainData.Name, |
| 247 | + IconUrls = new List<string> { twChainData.Icon.Url }, |
| 248 | + NativeCurrency = new NativeCurrency |
| 249 | + { |
| 250 | + Name = twChainData.NativeCurrency.Name, |
| 251 | + Symbol = twChainData.NativeCurrency.Symbol, |
| 252 | + Decimals = (uint)twChainData.NativeCurrency.Decimals, |
| 253 | + }, |
| 254 | + RpcUrls = new List<string> { $"https://{chainId}.rpc.thirdweb.com/" }, |
| 255 | + }; |
| 256 | + var rpcRequest = new RpcRequest { Method = "wallet_addEthereumChain", Params = new object[] { addEthereumChainParameter } }; |
| 257 | + _ = await WebGLMetaMask.Instance.RequestAsync<string>(rpcRequest); |
| 258 | + } |
| 259 | + |
| 260 | + #endregion |
| 261 | + } |
| 262 | +} |
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