public Chain(Block forkBlock, Block firstBlock) //creates generic chain
{
var forkBlockHash = forkBlock.GetHash();
string name;
var randomValueBuffer = new byte[8];
new Random().NextBytes(randomValueBuffer);
name = forkBlock.Height.ToString() + "-" + HexConverter.ToPrefixString(randomValueBuffer);
coder = new SerialDictionaryCoder($"chains\\{name}", $"tables\\{name}", 32, 3); //blockhash length, max data length = 2^(3*8) bytes
if (coder.Count != 0)
{
throw new Exception("Chain already exists");
}
ForkBlockHeight = forkBlock.Height;
ForkBlockHash = forkBlockHash;
AddBlock(forkBlock);
topBlockOffset = 0;
if (firstBlock != null)
{
AddBlock(firstBlock);
Height = firstBlock.Height;
}
else
{
Height = forkBlock.Height;
}
}
public Chain(string name) //loads chain
{
coder = new SerialDictionaryCoder($"chains\\{name}", $"tables\\{name}", 32, 3);
topBlockOffset = coder.Lookup.GetIndexOffset(coder.Count - 1);
var topBlock = new Block(coder.Lookup.ReadByOffset(topBlockOffset));
var bottomBlock = new Block(coder.Lookup.ReadByOffset(0));
Height = (int)topBlock.Height;
ForkBlockHeight = (int)bottomBlock.Height;
ForkBlockHash = bottomBlock.GetHash();
}
//Filename: main or [hex fork block height]-[hex block hash]
//note: block hash of fork block height + 1
public Chain() //creates main chain
{
coder = new SerialDictionaryCoder($"chains\\main", $"tables\\main", 32, 3);
ForkBlockHash = Block.Genesis.GetHash();
ForkBlockHeight = 0;
}
