The Thirdweb .NET SDK is a powerful library that allows developers to interact with the blockchain using the .NET framework.
It provides a set of convenient methods and classes to simplify the integration of Web3 functionality into your .NET applications.
Features
Connect to any EVM network
Query blockchain data using Thirdweb RPC
Interact with smart contracts
Installation
To use the Thirdweb .NET SDK in your project, you can either download the source code and build it manually, or install it via NuGet package manager.
dotnet add package Thirdweb
Usage
Simple Example
// A single client fits most use cases
var client = ThirdwebClient.Create(clientId: "myClientId", bundleId: "com.my.bundleid");
// Optionally pass abi, if not passed we fetch it for you
var contract = await ThirdwebContract.Create(client: client, address: "0x81ebd23aA79bCcF5AaFb9c9c5B0Db4223c39102e", chain: 421614);
var readResult = await ThirdwebContract.Read<string>(contract, "name");
Console.WriteLine($"Contract read result: {readResult}");
// Create embedded account as signer to unlock web2 auth
var embeddedAccount = await EmbeddedAccount.Create(client: client, email: "email@email.com"); // or email: null, phoneNumber: "+1234567890"
// Relog if embedded account not logged in
if (!await embeddedAccount.IsConnected())
{
await embeddedAccount.SendOTP();
Console.WriteLine("Please submit the OTP.");
var otp = Console.ReadLine();
(var embeddedAccountAddress, var canRetry) = await embeddedAccount.SubmitOTP(otp);
if (embeddedAccountAddress == null && canRetry)
{
Console.WriteLine("Please submit the OTP again.");
otp = Console.ReadLine();
(embeddedAccountAddress, _) = await embeddedAccount.SubmitOTP(otp);
}
if (embeddedAccountAddress == null)
{
Console.WriteLine("OTP login failed. Please try again.");
return;
}
}
// Create a smart account to unlock gasless features, with embedded account as a signer
var smartAccount = await SmartAccount.Create(client: client, personalAccount: embeddedAccount, factoryAddress: "0xbf1C9aA4B1A085f7DA890a44E82B0A1289A40052", gasless: true, chainId: 421614);
// Log addresses
Console.WriteLine($"Embedded Account: {await embeddedAccount.GetAddress()}");
Console.WriteLine($"Smart Account: {await smartAccount.GetAddress()}");
// Sign, triggering deploy as needed and 1271 verification if it's a smart wallet
var message = "Hello, Thirdweb!";
var signature = await smartAccount.PersonalSign(message);
Console.WriteLine($"Signed message: {signature}");
var writeResult = await ThirdwebContract.Write(smartAccount, contract, "mintTo", 0, await smartAccount.GetAddress(), 100);
Console.WriteLine($"Contract write result: {writeResult}");
Advanced Example
using Thirdweb;
// Do not use secret keys client side, use client id/bundle id instead
var secretKey = Environment.GetEnvironmentVariable("THIRDWEB_SECRET_KEY");
// Do not use private keys client side, use embedded/smart accounts instead
var privateKey = Environment.GetEnvironmentVariable("PRIVATE_KEY");
// Fetch timeout options are optional, default is 60000ms
var client = ThirdwebClient.Create(secretKey: secretKey, fetchTimeoutOptions: new TimeoutOptions(storage: 30000, rpc: 60000));
var contract = await ThirdwebContract.Create(client: client, address: "0x81ebd23aA79bCcF5AaFb9c9c5B0Db4223c39102e", chain: 421614);
var readResult = await ThirdwebContract.Read<string>(contract, "name");
Console.WriteLine($"Contract read result: {readResult}");
// Create accounts (this is an advanced use case, typically one account is plenty)
var privateKeyAccount = await PrivateKeyAccount.Create(client: client, privateKeyHex: privateKey);
var embeddedAccount = await EmbeddedAccount.Create(client: client, email: "email@email.com"); // or email: null, phoneNumber: "+1234567890"
var smartAccount = await SmartAccount.Create(client: client, personalAccount: embeddedAccount, factoryAddress: "0xbf1C9aA4B1A085f7DA890a44E82B0A1289A40052", gasless: true, chainId: 421614);
// // Reset embedded account (optional step for testing login flow)
// if (await embeddedAccount.IsConnected())
// {
// await embeddedAccount.Disconnect();
// }
// Relog if embedded account not logged in
if (!await embeddedAccount.IsConnected())
{
await embeddedAccount.SendOTP();
Console.WriteLine("Please submit the OTP.");
var otp = Console.ReadLine();
(var embeddedAccountAddress, var canRetry) = await embeddedAccount.SubmitOTP(otp);
if (embeddedAccountAddress == null && canRetry)
{
Console.WriteLine("Please submit the OTP again.");
otp = Console.ReadLine();
(embeddedAccountAddress, _) = await embeddedAccount.SubmitOTP(otp);
}
if (embeddedAccountAddress == null)
{
Console.WriteLine("OTP login failed. Please try again.");
return;
}
}
// Connect the smart account with embedded signer and grant a session key to pk account (advanced use case)
_ = await smartAccount.CreateSessionKey(
signerAddress: await privateKeyAccount.GetAddress(),
approvedTargets: new List<string>() { Constants.ADDRESS_ZERO },
nativeTokenLimitPerTransactionInWei: "0",
permissionStartTimestamp: "0",
permissionEndTimestamp: (Utils.GetUnixTimeStampNow() + 86400).ToString(),
reqValidityStartTimestamp: "0",
reqValidityEndTimestamp: Utils.GetUnixTimeStampIn10Years().ToString()
);
// Reconnect to same smart account with pk account as signer (specifying account address override)
smartAccount = await SmartAccount.Create(
client: client,
personalAccount: privateKeyAccount,
factoryAddress: "0xbf1C9aA4B1A085f7DA890a44E82B0A1289A40052",
gasless: true,
chainId: 421614,
accountAddressOverride: await smartAccount.GetAddress()
);
// Log addresses
Console.WriteLine($"PrivateKey Account: {await privateKeyAccount.GetAddress()}");
Console.WriteLine($"Embedded Account: {await embeddedAccount.GetAddress()}");
Console.WriteLine($"Smart Account: {await smartAccount.GetAddress()}");
// Sign, triggering deploy as needed and 1271 verification if it's a smart wallet
var message = "Hello, Thirdweb!";
var signature = await smartAccount.PersonalSign(message);
Console.WriteLine($"Signed message: {signature}");
var balanceBefore = await ThirdwebContract.Read<BigInteger>(contract, "balanceOf", await smartAccount.GetAddress());
Console.WriteLine($"Balance before mint: {balanceBefore}");
var writeResult = await ThirdwebContract.Write(smartAccount, contract, "mintTo", 0, await smartAccount.GetAddress(), 100);
Console.WriteLine($"Contract write result: {writeResult}");
var balanceAfter = await ThirdwebContract.Read<BigInteger>(contract, "balanceOf", await smartAccount.GetAddress());
Console.WriteLine($"Balance after mint: {balanceAfter}");
// Storage actions
// // Will download from IPFS or normal urls
// var downloadResult = await ThirdwebStorage.Download<string>(client: client, uri: "AnyUrlIncludingIpfs");
// Console.WriteLine($"Download result: {downloadResult}");
// // Will upload to IPFS
// var uploadResult = await ThirdwebStorage.Upload(client: client, path: "AnyPath");
// Console.WriteLine($"Upload result preview: {uploadResult.PreviewUrl}");
// Access RPC directly if needed, generally not recommended
// var rpc = ThirdwebRPC.GetRpcInstance(client, 421614);
// var blockNumber = await rpc.SendRequestAsync<string>("eth_blockNumber");
// Console.WriteLine($"Block number: {blockNumber}");
