public long nStakeModifier { get; set; }
/// <summary>
- /// Stake entropy bit
+ /// Chain trust score
/// </summary>
- public byte nEntropyBit { get; set; }
+ public byte[] ChainTrust { get; set; }
/// <summary>
/// Proof-of-Stake hash
/// <summary>
/// Previous block cursor
/// </summary>
+ [Ignore]
public CBlockStoreItem prev {
get { return CBlockStore.Instance.GetCursor(prevHash); }
}
/// <summary>
/// Next block cursor
/// </summary>
+ [Ignore]
public CBlockStoreItem next
{
get { return CBlockStore.Instance.GetCursor(nextHash); }
}
+ [Ignore]
bool IsInMainChain
{
get { return (next != null); }
}
-
- /// <summary>
- /// STake modifier generation flag
- /// </summary>
- public bool GeneratedStakeModifier
+ /// <summary>
+ /// STake modifier generation flag
+ /// </summary>
+ [Ignore]
+ public bool GeneratedStakeModifier
{
get { return (BlockTypeFlag & BlockType.BLOCK_STAKE_MODIFIER) != 0; }
}
+ /// <summary>
+ /// Stake entropy bit
+ /// </summary>
+ [Ignore]
public uint StakeEntropyBit
{
get { return ((uint)(BlockTypeFlag & BlockType.BLOCK_STAKE_ENTROPY) >> 1); }
/// <summary>
/// Block has no proof-of-stake flag.
/// </summary>
+ [Ignore]
public bool IsProofOfWork
{
- get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) != 0; }
+ get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) == 0; }
}
/// <summary>
/// Block has proof-of-stake flag set.
/// </summary>
+ [Ignore]
public bool IsProofOfStake
{
- get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) == 0; }
+ get { return (BlockTypeFlag & BlockType.BLOCK_PROOF_OF_STAKE) != 0; }
}
+ /// <summary>
+ /// Chain trust score.
+ /// </summary>
+ [Ignore]
+ public uint256 nChainTrust {
+ get
+ {
+ if (ChainTrust.Length != 32)
+ {
+ byte[] tmp = ChainTrust;
+ Array.Resize(ref tmp, 32);
+ ChainTrust = tmp;
+ }
+
+ return ChainTrust;
+ }
+ set { ChainTrust = Interop.TrimArray(value); }
+ }
+
+ /// <summary>
+ /// Block trust score.
+ /// </summary>
+ [Ignore]
+ public uint256 nBlockTrust
+ {
+ get
+ {
+ uint256 nTarget = 0;
+ nTarget.Compact = nBits;
+
+ /* Old protocol */
+ if (nTime < NetUtils.nChainChecksSwitchTime)
+ {
+ return IsProofOfStake ? (new uint256(1) << 256) / (nTarget + 1) : 1;
+ }
+
+ /* New protocol */
+
+ // Calculate work amount for block
+ var nPoWTrust = NetUtils.nPoWBase / (nTarget + 1);
+
+ // Set nPowTrust to 1 if we are checking PoS block or PoW difficulty is too low
+ nPoWTrust = (IsProofOfStake || !nPoWTrust) ? 1 : nPoWTrust;
+
+ // Return nPoWTrust for the first 12 blocks
+ if (prev == null || prev.nHeight < 12)
+ return nPoWTrust;
+
+ CBlockStoreItem currentIndex = prev;
+
+ if (IsProofOfStake)
+ {
+ var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
+
+ // Return 1/3 of score if parent block is not the PoW block
+ if (!prev.IsProofOfWork)
+ {
+ return nNewTrust / 3;
+ }
+
+ int nPoWCount = 0;
+
+ // Check last 12 blocks type
+ while (prev.nHeight - currentIndex.nHeight < 12)
+ {
+ if (currentIndex.IsProofOfWork)
+ {
+ nPoWCount++;
+ }
+ currentIndex = currentIndex.prev;
+ }
+
+ // Return 1/3 of score if less than 3 PoW blocks found
+ if (nPoWCount < 3)
+ {
+ return nNewTrust / 3;
+ }
+
+ return nNewTrust;
+ }
+ else
+ {
+ var nLastBlockTrust = prev.nChainTrust - prev.prev.nChainTrust;
+
+ // Return nPoWTrust + 2/3 of previous block score if two parent blocks are not PoS blocks
+ if (!prev.IsProofOfStake || !prev.prev.IsProofOfStake)
+ {
+ return nPoWTrust + (2 * nLastBlockTrust / 3);
+ }
+
+ int nPoSCount = 0;
+
+ // Check last 12 blocks type
+ while (prev.nHeight - currentIndex.nHeight < 12)
+ {
+ if (currentIndex.IsProofOfStake)
+ {
+ nPoSCount++;
+ }
+ currentIndex = currentIndex.prev;
+ }
+
+ // Return nPoWTrust + 2/3 of previous block score if less than 7 PoS blocks found
+ if (nPoSCount < 7)
+ {
+ return nPoWTrust + (2 * nLastBlockTrust / 3);
+ }
+
+ nTarget.Compact = prev.nBits;
+
+ if (!nTarget)
+ {
+ return 0;
+ }
+
+ var nNewTrust = (new uint256(1) << 256) / (nTarget + 1);
+
+ // Return nPoWTrust + full trust score for previous block nBits
+ return nPoWTrust + nNewTrust;
+ }
+ }
+ }
}
fStreamReadWrite = File.Open(strBlockFile, FileMode.OpenOrCreate, FileAccess.ReadWrite);
+ Instance = this;
+
if (firstInit)
{
lock (LockObj)
blockMap.TryAdd(item.Hash, item);
}
}
-
- Instance = this;
}
public bool GetTransaction(uint256 TxID, ref CTransaction tx)
return false;
}
- // TODO: compute chain trust, set stake entropy bit, record proof-of-stake hash value
+ // Compute chain trust score
+ itemTemplate.nChainTrust = (itemTemplate.prev != null ? itemTemplate.prev.nChainTrust : 0) + itemTemplate.nBlockTrust;
+
+ if (!itemTemplate.SetStakeEntropyBit(Entropy.GetStakeEntropyBit(itemTemplate.nHeight, blockHash)))
+ {
+ return false; // SetStakeEntropyBit() failed
+ }
+
+ // TODO: set stake entropy bit, record proof-of-stake hash value
// TODO: compute stake modifier
var itemTemplate = new CBlockStoreItem()
{
nHeight = nHeight,
- nEntropyBit = Entropy.GetStakeEntropyBit(nHeight, nHash)
};
itemTemplate.FillHeader(block.header);
git://git.novaco.in / NovacoinLibrary.git / blobdiff