public static async Task <List <Contact> > GetPublicKeysAndContactAddresses(TangleMessenger tangleMessenger, string receiverAddress, bool dontLoadSql = false)
{
var trytes = await tangleMessenger.GetMessagesAsync(receiverAddress, 3, false, dontLoadSql);
var contacts = new List <Contact>();
foreach (var tryte in trytes)
{
var trytesString = tryte.Message.ToString();
if (!trytesString.Contains(ChiotaConstants.LineBreak))
{
continue;
}
try
{
var index = trytesString.IndexOf(ChiotaConstants.LineBreak, StringComparison.Ordinal);
var publicKeyString = trytesString.Substring(0, index);
var bytesKey = new TryteString(publicKeyString).DecodeBytesFromTryteString();
contacts.Add(
new Contact
{
NtruKey = new NTRUPublicKey(bytesKey),
ContactAddress = trytesString.Substring(index + ChiotaConstants.LineBreak.Length, 81)
});
}
catch
{
// ignored
}
}
return(RemoveDuplicateContacts(contacts));
}
public static async Task <List <MessageViewModel> > GetNewMessages(IAsymmetricKeyPair keyPair, Contact contact, TangleMessenger tangle)
{
var trytes = await tangle.GetMessagesAsync(contact.ChatAddress, 3, true);
var messagesEncrypted = new List <ChatMessage>();
foreach (var tryte in trytes)
{
try
{
messagesEncrypted.Add(ReadChatMessage(tryte));
}
catch
{
// ignored
}
}
var sortedEncryptedMessages = messagesEncrypted.OrderBy(o => o.Date).ToList();
var messages = new List <MessageViewModel>();
for (var i = 0; i < sortedEncryptedMessages.Count - 1; i = i + 2)
{
if (TwoPartsOfMessage(sortedEncryptedMessages, i))
{
TryteString encryptedMessage;
if (sortedEncryptedMessages[i].IsFirstPart)
{
encryptedMessage = new TryteString(sortedEncryptedMessages[i].Message + sortedEncryptedMessages[i + 1].Message);
}
else
{
encryptedMessage = new TryteString(sortedEncryptedMessages[i + 1].Message + sortedEncryptedMessages[i].Message);
}
var decryptedMessage = Encoding.UTF8.GetString(new NtruKex().Decrypt(keyPair, encryptedMessage.DecodeBytesFromTryteString()));
messages.Add(new MessageViewModel
{
Text = decryptedMessage,
MessagDateTime = sortedEncryptedMessages[i].Date.ToLocalTime(),
IsIncoming = sortedEncryptedMessages[i].Signature == contact.PublicKeyAddress.Substring(0, 30),
ProfileImage = contact.ImageHash
});
}
else
{
i--;
}
}
return(messages);
}
