public bool AcceptBlock(ref CBlock block)
{
uint256 nHash = block.header.Hash;
if (blockMap.ContainsKey(nHash))
{
// Already have this block.
return false;
}
CBlockStoreItem prevBlockCursor;
if (!blockMap.TryGetValue(block.header.prevHash, out prevBlockCursor))
{
// Unable to get the cursor.
return false;
}
var prevBlockHeader = prevBlockCursor.BlockHeader;
uint nHeight = prevBlockCursor.nHeight + 1;
// Check timestamp against prev
if (NetInfo.FutureDrift(block.header.nTime) < prevBlockHeader.nTime)
{
// block's timestamp is too early
return false;
}
// Check that all transactions are finalized
foreach (var tx in block.vtx)
{
if (!tx.IsFinal(nHeight, block.header.nTime))
{
return false;
}
}
// Check that the block chain matches the known block chain up to a checkpoint
if (!HashCheckpoints.Verify(nHeight, nHash))
{
return false; // rejected by checkpoint lock-in
}
// Enforce rule that the coinbase starts with serialized block height
var expect = new CScript();
expect.AddNumber((int)nHeight);
byte[] expectBytes = expect;
byte[] scriptSig = block.vtx[0].vin[0].scriptSig;
if (!expectBytes.SequenceEqual(scriptSig.Take(expectBytes.Length)))
{
return false; // coinbase doesn't start with serialized height.
}
// Write block to file.
var newCursor = new CBlockStoreItem()
{
nHeight = nHeight,
};
newCursor.FillHeader(block.header);
if (!AddItemToIndex(ref newCursor, ref block))
{
dbConn.Rollback();
return false;
}
return true;
}
