internal ChainedHeader GetFork(ChainedHeader chainTip)
{
if (chainTip == null)
{
return(null);
}
if (chainTip.Height > this.LastBlockSyncedHeight)
{
if (this.LastBlockSyncedHeight < 0)
{
return(null);
}
chainTip = chainTip.GetAncestor(this.LastBlockSyncedHeight);
}
if (chainTip.Height == this.LastBlockSyncedHeight)
{
if (chainTip.HashBlock == uint256.Parse(this.LastBlockSyncedHash))
{
return(chainTip);
}
else
{
return(null);
}
}
var blockLocator = new BlockLocator()
{
Blocks = this.BlockLocator.Split(',').Select(strHash => uint256.Parse(strHash)).ToList()
};
List <int> locatorHeights = ChainedHeaderExt.GetLocatorHeights(this.LastBlockSyncedHeight);
for (int i = 0; i < locatorHeights.Count; i++)
{
if (chainTip.Height > locatorHeights[i])
{
chainTip = chainTip.GetAncestor(locatorHeights[i]);
}
if (chainTip.HashBlock == blockLocator.Blocks[i])
{
return(chainTip);
}
}
return(null);
}
internal ChainedHeader GetFork(ChainedHeader chainTip)
{
if (chainTip == null || this.LastBlockSyncedHeight < 0)
{
return(null);
}
if (chainTip.Height >= this.LastBlockSyncedHeight)
{
ChainedHeader fork = (chainTip.Height == this.LastBlockSyncedHeight) ? chainTip : chainTip.GetAncestor(this.LastBlockSyncedHeight);
if (fork.HashBlock == uint256.Parse(this.LastBlockSyncedHash))
{
return(fork);
}
}
var blockLocator = new BlockLocator()
{
Blocks = this.BlockLocator.Split(',').Select(strHash => uint256.Parse(strHash)).ToList()
};
List <int> locatorHeights = ChainedHeaderExt.GetLocatorHeights(this.LastBlockSyncedHeight);
// Find a locator block at or below the chain tip.
for (int i = 0; i < locatorHeights.Count; i++)
{
if (chainTip.Height < locatorHeights[i])
{
continue;
}
chainTip = chainTip.GetAncestor(locatorHeights[i]);
if (chainTip.HashBlock == blockLocator.Blocks[i])
{
return(chainTip);
}
}
return(null);
}
internal bool WalletContainsBlock(ChainedHeader lastBlockSynced)
{
if (lastBlockSynced == null)
{
return(true);
}
if (this.LastBlockSyncedHeight <= lastBlockSynced.Height)
{
return(uint256.Parse(this.LastBlockSyncedHash) == lastBlockSynced.HashBlock);
}
uint256[] hashes = GetBlockLocatorHashes();
if (hashes.Length == 0)
{
return(false);
}
int[] heights = ChainedHeaderExt.GetLocatorHeights(this.LastBlockSyncedHeight).ToArray();
return(hashes.Select((h, n) => lastBlockSynced.HashBlock == h && lastBlockSynced.Height == heights[n]).Any(e => true));
}