public async Task <IReadOnlyList <ByteString> > GetTransactions(ByteString from)
{
// find last transaction to return
var resl = await GetLastTransactionInternal();
if (resl == null)
{
return(new List <ByteString>().AsReadOnly());
}
// find first transaction to return
MongoDbTransaction resf = null;
if (from != null)
{
var cmpkey = from.ToByteArray();
resf = await TransactionCollection.Find(x => x.TransactionHash == cmpkey).FirstOrDefaultAsync();
}
List <MongoDbTransaction> l;
if (resf == null)
{
l = await TransactionCollection.Find(x => x.Timestamp <= resl.Timestamp).SortBy(x => x.Timestamp).ToListAsync();
}
else
{
l = await TransactionCollection.Find(x => x.Timestamp > resf.Timestamp && x.Timestamp <= resl.Timestamp)
.SortBy(x => x.Timestamp).ToListAsync();
}
return(l.Select(x => new ByteString(x.RawData)).ToList().AsReadOnly());
}
public async Task <ByteString> GetTransaction(ByteString mutationHash)
{
var key = mutationHash.ToByteArray();
var res = await TransactionCollection.Find(x => x.MutationHash == key).SingleOrDefaultAsync();
return(res == null ? null : new ByteString(res.RawData));
}
private async Task <MongoDbTransaction> GetLastTransactionInternal()
{
// look for potential last transaction
var res = await TransactionCollection.Find(x => true)
.SortByDescending(x => x.Timestamp)
.FirstOrDefaultAsync();
if (res == null)
{
return(null);
}
// look if a pending transaction
var resp = await PendingTransactionCollection.Find(x => true).SortByDescending(x => x.Timestamp).FirstOrDefaultAsync();
if (resp == null) // no pending transaction
{
// return last transaction
return(res);
}
else
{
// else return last transaction no younger than pending transaction
res = await TransactionCollection.Find(x => x.Timestamp < resp.Timestamp)
.SortByDescending(x => x.Timestamp)
.FirstOrDefaultAsync();
return(res);
}
}
public async Task <IReadOnlyList <ByteString> > GetRecordMutations(ByteString recordKey)
{
var key = recordKey.ToByteArray();
var res = await TransactionCollection.Find(Builders <MongoDbTransaction> .Filter.AnyEq(x => x.Records, key))
.Project(x => x.MutationHash)
.SortBy(x => x.Timestamp)
.ToListAsync();
return(res.Select(x => new ByteString(x)).ToList().AsReadOnly());
}
private void deleteTransactionButton_Click(object sender, EventArgs e)
{
var data = transactionsListView.SelectedItems[0].SubItems;
string[] args = new string[data.Count];
int i = 0;
foreach (ListViewItem.ListViewSubItem arg in data)
{
//Console.WriteLine(arg.Text);
args[i] = arg.Text;
i++;
}
Transaction newTransaction = new Transaction(args);
//Console.WriteLine(newTransaction);
_collection.Remove(_collection.Find(newTransaction));
UpdateData(_collection);
}
public async Task <IReadOnlyList <ByteString> > GetTransactions(ByteString from)
{
MongoDbTransaction res = null;
if (from != null)
{
var cmpkey = from.ToByteArray();
res = await TransactionCollection.Find(x => x.TransactionHash == cmpkey).FirstOrDefaultAsync();
}
List <MongoDbTransaction> l;
if (res == null)
{
l = await TransactionCollection.Find(x => true).SortBy(x => x.Timestamp).ToListAsync();
}
else
{
BsonTimestamp ts = res.Timestamp;
l = await TransactionCollection.Find(x => x.Timestamp > ts).SortBy(x => x.Timestamp).ToListAsync();
}
return(l.Select(x => new ByteString(x.RawData)).ToList().AsReadOnly());
}
public async Task <ByteString> GetLastTransaction()
{
var res = await TransactionCollection.Find(x => true).SortByDescending(x => x.Timestamp).FirstOrDefaultAsync();
return(res == null ? ByteString.Empty : new ByteString(res.TransactionHash));
}
