BlockData FetchStartingBlock(WebClient wc, LatestBlock lb)
{
string fetchHash = lb.hash;
if (Directory.Exists("Cache"))
{
string[] files = Directory.GetFiles("Cache", "*.cache");
long newest = 0;
string newestFile = null;
foreach (string file in files)
{
string ticksStr = Path.GetFileNameWithoutExtension(file);
long ticks = Convert.ToInt64(ticksStr);
if (ticks > newest)
{
newest = ticks;
newestFile = file;
}
}
if (newestFile != null)
{
FileStream fs = File.OpenRead(newestFile);
BinaryReader br = new BinaryReader(fs);
fetchHash = br.ReadString();
br.Close();
}
}
string uri = string.Format("https://blockchain.info/block-index/{0}?format=json", fetchHash);
Debug.WriteLine("Fetching latest: " + uri);
string blockDataJSON = wc.DownloadString(uri);
BlockData bd = JsonConvert.DeserializeObject<BlockData>(blockDataJSON);
return bd;
}
BlockData FetchStartingBlock(WebClient wc, LatestBlock lb)
{
string fetchHash = lb.hash;
if (Directory.Exists("Cache"))
{
string[] files = Directory.GetFiles("Cache", "*.cache");
long newest = 0;
string newestFile = null;
foreach (string file in files)
{
string ticksStr = Path.GetFileNameWithoutExtension(file);
long ticks = Convert.ToInt64(ticksStr);
if (ticks > newest)
{
newest = ticks;
newestFile = file;
}
}
if (newestFile != null)
{
FileStream fs = File.OpenRead(newestFile);
BinaryReader br = new BinaryReader(fs);
fetchHash = br.ReadString();
br.Close();
}
}
string uri = string.Format("https://blockchain.info/block-index/{0}?format=json", fetchHash);
Debug.WriteLine("Fetching latest: " + uri);
string blockDataJSON = wc.DownloadString(uri);
BlockData bd = JsonConvert.DeserializeObject<BlockData>(blockDataJSON);
return bd;
}
void FindTheBitcoins()
{
// Get the latest block id
WebClient wc = new WebClient();
string latestBlockJSON = wc.DownloadString("https://blockchain.info/latestblock");
LatestBlock lb = JsonConvert.DeserializeObject<LatestBlock>(latestBlockJSON);
// Make sure there is actually work to be done here
if (lb.hash != _lastBlock)
{
// Fetch the starting block data
BlockData bd = FetchStartingBlock(wc, lb);
// Fetch backwards until we get to our marker
List<Transaction> transactions = new List<Transaction>();
while (bd.hash != _lastBlock)
{
Debug.WriteLine("Parsing block: {0}", bd.height);
// Process transactions
for( int j = bd.tx.Count - 1; j >= 0; j-- )
{
Tx t = bd.tx[j];
List<MoneyPlace> dests = new List<MoneyPlace>();
foreach (Out o in t.@out)
{
MoneyPlace d = new MoneyPlace();
d.Address = o.addr;
d.Value = o.value;
dests.Add(d);
}
Transaction trans = new Transaction();
trans.Hash = t.hash;
if (t.inputs[0].prev_out != null)
{
trans.Sources = new MoneyPlace[t.inputs.Count];
for (int i = 0; i < t.inputs.Count; i++)
{
trans.Sources[i] = new MoneyPlace();
trans.Sources[i].Address = t.inputs[i].prev_out.addr;
trans.Sources[i].Value = t.inputs[i].prev_out.value;
}
}
else
trans.Sources = null;
trans.Destinations = dests.ToArray();
transactions.Add(trans);
}
// Cache transactions for now
if (transactions.Count > 100000)
{
CacheTransactions(transactions, bd);
transactions.Clear();
}
// go backwards
bd = PrevBlock(wc, bd.prev_block);
}
// Cache remaining transactions
CacheTransactions(transactions, bd);
/*
// Track coins through the block chain
for (int i = transactions.Count - 1; i >= 0; i--)
{
Transaction t = transactions[i];
if (t.Sources != null)
{
// coins are taken from sources and given to destinations
foreach (MoneyPlace source in t.Sources)
{
_coinData[source.Address] -= source.Value;
if (_coinData[source.Address] < 0)
{
// Problem!
Debug.WriteLine("ERROR: gave away more than we knew about!?");
throw new System.Exception("WTF!");
}
else if (_coinData[source.Address] == 0)
{
// All out of money - toss this address out
_coinData.Remove(source.Address);
}
}
}
// Give to the destinations
foreach (MoneyPlace dest in t.Destinations)
{
if (!_coinData.ContainsKey(dest.Address))
_coinData[dest.Address] = dest.Value;
else
_coinData[dest.Address] += dest.Value;
}
}
// Save the coin data
SaveCoinData();
*/
}
}