Comprehensive web3 SDK for C#

Showcase.cs

using System;
using System.Collections.Generic;

var web3 = new Web3("ProjectId", "ProjectSecret");

// Get the chain height
var block1 = await web3.EthMainNet.Eth.GetBlockNumberAsync();
var block2 = await web3.Optimism.Eth.GetBlockNumberAsync();

// Query USDT balance
var balance1 = await web3.EthMainNet.Erc20.Usdt.Functions.BalanceOf.CallAsync("0x28c6c06298d514db089934071355e5743bf21d60");
var balance2 = await web3.Optimism.Erc20.Usdt.Functions.BalanceOf.CallAsync("0x28c6c06298d514db089934071355e5743bf21d60");

// Query NFT owner
var owner = await web3.EthMainNet.Erc721.BoredApesYachtClub.Functions.OwnerOf.CallAsync(2974);

// Polymorphism
var contracts = new List<Erc20StandardContract>()
{
    web3.EthMainNet.Erc20.Usdt.Standard,
    web3.EthMainNet.Erc20.Usdc.Standard,
    web3.EthMainNet.Erc20.Busd.Standard
};
foreach (var contract in contracts)
{
    var balance = await contract.BalanceOfAsync("0x28c6c06298d514db089934071355e5743bf21d60");
}

// Smart contract utilities such as multi-call
var results = await web3.EthMainNet.MultiCallAsync(new (Hex Address, bool AllowFailure, Hex CallData)[]
{
    (web3.EthMainNet.Erc20.ShibaInu.Address, false, "0x06fdde03"),
    (web3.EthMainNet.Erc721.BoredApesYachtClub.Address, false, web3.EthMainNet.Erc721.BoredApesYachtClub.Functions.OwnerOf.Data("0x692F70593d162dcAa5EB8663AAa4aeB83F4D766F")),
    ("0xd514db089934071355e5743bf21d6028c6c06298", false, "0x06fdde03"),
});

// Custom JSON RPC request
var result1 = await web3.EthMainNet.JsonRpcAsync("eth_getBalance", new[] {"0x743bf21d6028c6c06298d514db089934071355e5", "latest"});
var result2 = await web3.EthMainNet.JsonRpcAsync(new JsonRpcRequestData
{
    JsonRpc = "2.0",
    Method = "eth_getBalance",
    Params = new[] {"0x743bf21d6028c6c06298d514db089934071355e5", "latest"},
    Id = 5,
}.ToJson());

// On top of the pure RPC client, this library includes SDKs for other services

// Indexed data
var txList = await web3.EthMainNet.Index
    .From("0x3a2206206994597c13d831ec7dac17f958d2ee52", "0x97c13d831ec7dac17f958d2ee523a22062069945")
    .To("0x7f958d2ee523a2206206994597c13d831ec7dac1")
    .MinBlock(14_000_000)
    .MaxBlock(14_000_100)
    .ToListAsync();

// Real time events over websockets
using var newBlockSub = _web3.EthMainNet.Subscriptions.NewBlockHeader.Create();
var evenBlocks = newBlockSub.DataReceived
    .Where(block => block.Number % 2 == 0)
    .ToAsyncEnumerable()
await foreach (var block in evenBlocks)
{
    Console.WriteLine($"Block number: {block.Number.HexString}");
}

// Market data
var price1 = await web3.EthMainNet.PriceAsync();
var price2 = await web3.EthMainNet.Erc20.Matic.Metadata.PriceAsync();

// Static metadata
var symbol = web3.EthMainNet.Erc20.Matic.Metadata.Symbol;
var logoUrl = web3.EthMainNet.Erc20.Uni.Metadata.LogoUrl;