//Saves the current BlockChain and uncommitted transaction state to a checkpoint file
//{crypto provider name}\checkpoints\{checkpoint files}
public string CheckPoint()
{
Logger.Log("Saving checkpoint");
string checkpointDir = Path.Combine(this.appDir, _cryptoProvider.ProviderName(), "checkpoints");
if (!Directory.Exists(checkpointDir))
{
Directory.CreateDirectory(checkpointDir);
}
string filename = System.DateTime.Now.ToString("yyyyMMddHHmmss") + ".chk";
string filepath = Path.Combine(checkpointDir, filename);
using (StreamWriter writer = File.CreateText(filepath))
{
string line = "";
line = String.Join("|", NodeId, _cryptoProvider.ProviderName(), _currentTransactions.Count().ToString());
writer.WriteLine(line);
CheckPointTransactions(_currentTransactions, writer);
writer.WriteLine(_chain.Count());
foreach (Block b in _chain)
{
line = string.Join("|", b.Index, b.Timestamp, b.Proof, b.PreviousHash, b.Transactions.Count);
writer.WriteLine(line);
CheckPointTransactions(b.Transactions, writer);
}
}
Logger.Log($"Checkpoint saved : {filename}");
return(filename);
}
