public static async Task Main()
{
//DAI contract address
var contractAddress = "0x6b175474e89094c44da98b954eedeac495271d0f";
using (var client = new StreamingWebSocketClient("wss://mainnet.infura.io/ws/v3/7238211010344719ad14a89db874158c"))
{
try {
var eventSubscription = new EthLogsObservableSubscription(client);
eventSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
{
var transfer = log.DecodeEvent <TransferEventDTO>();
Console.WriteLine($@"{transfer.Log.TransactionHash}, From:{transfer.Event.From}, To:{transfer.Event.To}, Value:{Web3.Convert.FromWei(transfer.Event.Value)}");
});
eventSubscription.GetSubscribeResponseAsObservable().Subscribe(id => Console.WriteLine($"Subscribed with id: {id}"));
var filterAuction = Event <TransferEventDTO> .GetEventABI().CreateFilterInput(contractAddress);
await client.StartAsync();
await eventSubscription.SubscribeAsync(filterAuction);
Console.ReadLine();
await eventSubscription.UnsubscribeAsync();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
public static async Task SubscribeToSwaps() //https://uniswap.org/docs/v2/smart-contracts/pair/ Emitted each time a swap occurs via swap.
{
var token0 = "DAI";
var token1 = "ETH";
var pairContractAddress = "0xa478c2975ab1ea89e8196811f51a7b7ade33eb11";
using (var client = new StreamingWebSocketClient("wss://mainnet.infura.io/ws/v3/7238211010344719ad14a89db874158c"))
{
Console.WriteLine($"Uniswap trades for {token0} and {token1}");
try
{
var eventSubscription = new EthLogsObservableSubscription(client);
eventSubscription.GetSubscriptionDataResponsesAsObservable().Subscribe(log =>
{
var swap = log.DecodeEvent <SwapEventDTO>();
var amount0Out = Web3.Web3.Convert.FromWei(swap.Event.Amount0Out);
var amount1In = Web3.Web3.Convert.FromWei(swap.Event.Amount1In);
var amount0In = Web3.Web3.Convert.FromWei(swap.Event.Amount0In);
var amount1Out = Web3.Web3.Convert.FromWei(swap.Event.Amount1Out);
if (swap.Event.Amount0In == 0 && swap.Event.Amount1Out == 0)
{
var price = amount0Out / amount1In;
var quantity = amount1In;
Console.WriteLine($"Sell {token1} Price: {price.ToString("F4")} Quantity: {quantity.ToString("F4")}, From: {swap.Event.To} Block: {swap.Log.BlockNumber}");
}
else
{
var price = amount0In / amount1Out;
var quantity = amount1Out;
Console.WriteLine($"Buy {token1} Price: {price.ToString("F4")} Quantity: {quantity.ToString("F4")}, From: {swap.Event.To} Block: {swap.Log.BlockNumber}");
}
}
);
eventSubscription.GetSubscribeResponseAsObservable().Subscribe(id => Console.WriteLine($"Subscribed with id: {id}"));
var filterAuction = Event <SwapEventDTO> .GetEventABI().CreateFilterInput(pairContractAddress);
await client.StartAsync();
await eventSubscription.SubscribeAsync(filterAuction);
Console.ReadLine();
await eventSubscription.UnsubscribeAsync();
}
catch (Exception e)
{
Console.WriteLine(e.Message);
}
}
}
public static async Task SubscribeTosync() //Emitted each time reserves are updated via mint, burn, swap, or sync. https://uniswap.org/docs/v2/smart-contracts/pair/
{
string uniSwapFactoryAddress = "0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f";
var web3 = new Web3.Web3("https://mainnet.infura.io/v3/7238211010344719ad14a89db874158c");
string daiAddress = "0x6b175474e89094c44da98b954eedeac495271d0f";
string wethAddress = "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2";
var pairContractAddress = await web3.Eth.GetContractQueryHandler <GetPairFunction>()
.QueryAsync <string>(uniSwapFactoryAddress,
new GetPairFunction()
{
TokenA = daiAddress, TokenB = wethAddress
});
var filter = Event <PairSyncEventDTO> .GetEventABI()
.CreateFilterInput(new[] { pairContractAddress });
using (var client = new StreamingWebSocketClient("wss://mainnet.infura.io/ws/v3/7238211010344719ad14a89db874158c"))
{
var subscription = new EthLogsObservableSubscription(client);
subscription.GetSubscriptionDataResponsesAsObservable().
Subscribe(log =>
{
try
{
EventLog <PairSyncEventDTO> decoded = Event <PairSyncEventDTO> .DecodeEvent(log);
if (decoded != null)
{
decimal reserve0 = Web3.Web3.Convert.FromWei(decoded.Event.Reserve0);
decimal reserve1 = Web3.Web3.Convert.FromWei(decoded.Event.Reserve1);
Console.WriteLine($@"Price={reserve0 / reserve1}");
}
else
{
Console.WriteLine(@"Found not standard transfer log");
}
}
catch (Exception ex)
{
Console.WriteLine(@"Log Address: " + log.Address + @" is not a standard transfer log:", ex.Message);
}
});
await client.StartAsync();
subscription.GetSubscribeResponseAsObservable().Subscribe(id => Console.WriteLine($"Subscribed with id: {id}"));
await subscription.SubscribeAsync(filter);
while (true) //pinging to keep alive infura
{
var handler = new EthBlockNumberObservableHandler(client);
handler.GetResponseAsObservable().Subscribe(x => Console.WriteLine(x.Value));
await handler.SendRequestAsync();
Thread.Sleep(30000);
}
}
}
