SerializedBiscuit(byte[] authority, List <byte[]> blocks, List <RistrettoElement> keys, TokenSignature signature)
{
this.authority = authority;
this.blocks = blocks;
this.keys = keys;
this.signature = signature;
}
public Either <FormatError, SerializedBiscuit> Append(RNGCryptoServiceProvider rng, KeyPair keypair, Block block)
{
Format.Schema.Block b = block.Serialize();
try
{
MemoryStream stream = new MemoryStream();
b.WriteTo(stream);
byte[] data = stream.ToArray();
TokenSignature signature = this.signature.Sign(rng, keypair, data);
List <RistrettoElement> keys = new List <RistrettoElement>();
keys.AddRange(this.keys);
keys.Add(keypair.PublicKey);
List <byte[]> blocks = new List <byte[]>();
blocks.AddRange(this.blocks);
blocks.Add(data);
return(new Right(new SerializedBiscuit(authority, blocks, keys, signature)));
}
catch (IOException e)
{
return(new Left(new SerializationError(e.ToString())));
}
}
public Notification(
IUserRepository userRepository,
IEmailSender emailSender)
{
_userRepository = userRepository;
_emailSender = emailSender;
_web3 = new Web3("https://ropsten.infura.io/E8XftGiqmaErL2KN5Cp3");
_unitConversion = new UnitConversion();
_tokenSignature = new TokenSignature();
Addresses = new ConcurrentDictionary <BigInteger, NotificationModel>();
Task.Run(async() => await FillAddress());
}
private async Task NotifyEyEmail(Transaction transactions, NotificationModel user, string to, BigInteger value)
{
string tokenSymbol = "Ether";
if (TokenSignature.IsTransfer(transactions.Input))
{
var contract = _web3.Eth.GetContract(TokenSignature.StandartABI, transactions.To);
tokenSymbol = _tokenSignature.GetTokenSymbol(contract).Result;
}
await _emailSender.SendEmailAsync(user.Email, "Guapcoin Notification Service",
"Guapcoin\n\n"
+ $"You received {_unitConversion.FromWei(value)} {tokenSymbol}, in your address {to}.\n\n"
+ "For detailed information please open this link: "
+ $"https://ropsten.etherscan.io/tx/{transactions.TransactionHash}\n\n");
}
/// <summary>
/// Deserializes a SerializedBiscuit from a byte array
/// </summary>
/// <param name="slice"></param>
/// <returns></returns>
static public Either <Error, SerializedBiscuit> FromBytes(byte[] slice)
{
try
{
Format.Schema.Biscuit data = Format.Schema.Biscuit.Parser.ParseFrom(slice);
List <RistrettoElement> keys = data.Keys
.Select(key => new CompressedRistretto(key.ToByteArray()).Decompress())
.ToList();
byte[] authority = data.Authority.ToByteArray();
List <byte[]> blocks = data.Blocks.Select(block => block.ToByteArray()).ToList();
Either <Error, TokenSignature> signatureRes = TokenSignature.Deserialize(data.Signature);
if (signatureRes.IsLeft)
{
return(signatureRes.Left);
}
TokenSignature signature = signatureRes.Right;
SerializedBiscuit biscuitResult = new SerializedBiscuit(authority, blocks, keys, signature);
Either <Error, Void> res = biscuitResult.Verify();
if (res.IsLeft)
{
return(res.Left);
}
else
{
return(biscuitResult);
}
}
catch (InvalidProtocolBufferException e)
{
return(new DeserializationError(e.ToString()));
}
catch (InvalidEncodingException e)
{
return(new DeserializationError(e.ToString()));
}
}
static public Either <FormatError, SerializedBiscuit> Make(RNGCryptoServiceProvider rng, KeyPair root, Block authority)
{
Format.Schema.Block b = authority.Serialize();
try
{
using MemoryStream stream = new MemoryStream();
b.WriteTo(stream);
byte[] data = stream.ToArray();
TokenSignature signature = new TokenSignature(rng, root, data);
List <RistrettoElement> keys = new List <RistrettoElement>
{
root.PublicKey
};
return(new SerializedBiscuit(data, new List <byte[]>(), keys, signature));
}
catch (IOException e)
{
return(new SerializationError(e.ToString()));
}
}
private async Task ProcessBlockNumber(BigInteger newBlock)
{
var transactions = await _web3.Eth.Blocks.GetBlockWithTransactionsByNumber
.SendRequestAsync(new HexBigInteger(newBlock));
if (transactions != null)
{
foreach (var it in transactions.Transactions)
{
if (string.IsNullOrEmpty(it.To))
{
continue;
}
string to;
BigInteger value;
if (TokenSignature.IsTransfer(it.Input))
{
to = TokenSignature.TransferTo(it.Input);
value = TokenSignature.TransferValue(it.Input);
}
else
{
to = it.To;
value = it.Value.Value;
}
if (Addresses.TryGetValue(new HexBigInteger(to).Value, out var notifData))
{
if (notifData.NotificationsEnabled)
{
await NotifyEyEmail(it, notifData, to, value);
}
}
}
}
}
