public Task LoadAsync(ConcurrentChain chain)
{
Guard.Assert(chain.Tip == chain.Genesis);
Task task = Task.Run(() =>
{
using (DBreeze.Transactions.Transaction transaction = this.dbreeze.GetTransaction())
{
transaction.ValuesLazyLoadingIsOn = false;
ChainedBlock tip = null;
Row <int, BlockHeader> firstRow = transaction.Select <int, BlockHeader>("Chain", 0);
if (!firstRow.Exists)
{
return;
}
BlockHeader previousHeader = firstRow.Value;
Guard.Assert(previousHeader.GetHash() == chain.Genesis.HashBlock); // can't swap networks
foreach (Row <int, BlockHeader> row in transaction.SelectForwardSkip <int, BlockHeader>("Chain", 1))
{
if ((tip != null) && (previousHeader.HashPrevBlock != tip.HashBlock))
{
break;
}
tip = new ChainedBlock(previousHeader, row.Value.HashPrevBlock, tip);
previousHeader = row.Value;
}
if (previousHeader != null)
{
tip = new ChainedBlock(previousHeader, null, tip);
}
if (tip == null)
{
return;
}
this.locator = tip.GetLocator();
chain.SetTip(tip);
}
});
return(task);
}
/// <inheritdoc />
public Task <ChainedHeader> LoadAsync(ChainedHeader genesisHeader)
{
Task <ChainedHeader> task = Task.Run(() =>
{
using (DBreeze.Transactions.Transaction transaction = this.dbreeze.GetTransaction())
{
transaction.ValuesLazyLoadingIsOn = false;
ChainedHeader tip = null;
Row <int, byte[]> firstRow = transaction.Select <int, byte[]>("Chain", 0);
if (!firstRow.Exists)
{
return(genesisHeader);
}
BlockHeader previousHeader = this.dBreezeSerializer.Deserialize <BlockHeader>(firstRow.Value);
Guard.Assert(previousHeader.GetHash() == genesisHeader.HashBlock); // can't swap networks
foreach (Row <int, byte[]> row in transaction.SelectForwardSkip <int, byte[]>("Chain", 1))
{
if ((tip != null) && (previousHeader.HashPrevBlock != tip.HashBlock))
{
break;
}
BlockHeader blockHeader = this.dBreezeSerializer.Deserialize <BlockHeader>(row.Value);
tip = new ChainedHeader(previousHeader, blockHeader.HashPrevBlock, tip);
previousHeader = blockHeader;
}
if (previousHeader != null)
{
tip = new ChainedHeader(previousHeader, previousHeader.GetHash(), tip);
}
if (tip == null)
{
tip = genesisHeader;
}
this.locator = tip.GetLocator();
return(tip);
}
});
return(task);
}
