public async Task InsertSpentOutputs(Guid transactionId, IEnumerable <IOutput> outputs)
{
Action <MongoServerException> throwIfBackend = (exception) =>
{
if (exception != null && exception.IsDuplicateError())
{
throw new BackendException("entity already exists " +
((exception as MongoBulkWriteException <OutputEntity>)?.UnprocessedRequests.FirstOrDefault() as InsertOneModel <OutputEntity>)
?.Document.BsonId, ErrorCode.TransactionConcurrentInputsProblem);
}
};
try
{
var forInsert = outputs.Select(o => OutputEntity.Create(transactionId, o)).ToList();
while (forInsert.Count > 0)
{
var part = forInsert.Take(100);
forInsert = forInsert.Skip(100).ToList();
await _storage.InsertAsync(part);
}
}
catch (MongoServerException e)
{
throwIfBackend(e);
throw;
}
}
public async Task <IEnumerable <IOutput> > GetUnspentOutputs(IEnumerable <IOutput> outputs)
{
var enumerable = outputs.ToArray();
var ids = enumerable.Select(x => OutputEntity.GenerateId(x.TransactionHash, x.N)).ToArray();
var hs = new HashSet <string>();
while (ids.Any())
{
var part = ids.Take(200).ToArray();
var dbOutputs = await _storage.GetDataAsync(o => part.Contains(o.BsonId));
hs.UnionWith(dbOutputs.Select(x => x.BsonId));
ids = ids.Skip(200).ToArray();
}
return(enumerable.Where(x => !hs.Contains(OutputEntity.GenerateId(x.TransactionHash, x.N))));
}
public async Task RemoveSpentOutputs(IEnumerable <IOutput> outputs)
{
var ids = outputs.Select(x => OutputEntity.GenerateId(x.TransactionHash, x.N)).ToArray();
await _storage.DeleteAsync(o => ids.Contains(o.BsonId));
}