/// <exception cref="ProtocolException"/>
protected override void Parse()
{
// An inv is vector<CInv> where CInv is int+hash. The int is either 1 or 2 for tx or block.
var arrayLen = ReadVarInt();
if (arrayLen > _maxInventoryItems)
throw new ProtocolException("Too many items in INV message: " + arrayLen);
_items = new List<InventoryItem>((int) arrayLen);
for (var i = 0UL; i < arrayLen; i++)
{
if (Cursor + 4 + 32 > Bytes.Length)
{
throw new ProtocolException("Ran off the end of the INV");
}
var typeCode = ReadUint32();
InventoryItem.ItemType type;
// See ppszTypeName in net.h
switch (typeCode)
{
case 0:
type = InventoryItem.ItemType.Error;
break;
case 1:
type = InventoryItem.ItemType.Transaction;
break;
case 2:
type = InventoryItem.ItemType.Block;
break;
default:
throw new ProtocolException("Unknown CInv type: " + typeCode);
}
var item = new InventoryItem(type, ReadHash());
_items.Add(item);
}
Bytes = null;
}
/// <summary>
/// Asks the connected peer for the block of the given hash, and returns a Future representing the answer.
/// If you want the block right away and don't mind waiting for it, just call .get() on the result. Your thread
/// will block until the peer answers. You can also use the Future object to wait with a timeout, or just check
/// whether it's done later.
/// </summary>
/// <param name="blockHash">Hash of the block you were requesting.</param>
/// <exception cref="IOException"/>
public IAsyncResult BeginGetBlock(Sha256Hash blockHash, AsyncCallback callback, object state)
{
var getdata = new GetDataMessage(_params);
var inventoryItem = new InventoryItem(InventoryItem.ItemType.Block, blockHash);
getdata.AddItem(inventoryItem);
var future = new GetDataFuture<Block>(inventoryItem, callback, state);
// Add to the list of things we're waiting for. It's important this come before the network send to avoid
// race conditions.
lock (_pendingGetBlockFutures)
{
_pendingGetBlockFutures.Add(future);
}
_conn.WriteMessage(getdata);
return future;
}
public void AddItem(InventoryItem item)
{
_items.Add(item);
}
