//public void Reset()
//{
// _lastHash = -1;
// var path = Path.Combine(_storagePath, LookupKey + ".hash");
// if (File.Exists(path))
// {
// File.Delete(path);
// }
//}
public void Persist()
{
if (LastHash == CurrentHash)
return;
var path = Path.Combine(_storagePath, LookupKey + ".hash");
File.WriteAllText(path, CurrentHash.ToString(CultureInfo.InvariantCulture), Encoding.UTF8);
_lastHash = CurrentHash;
}
public HashFileStatus IsValid()
{
if (!File.Exists(Path))
{
return(HashFileStatus.Missing);
}
FileHash = Md5Functions.GenerateHashForFile(Path);
if (!CurrentHash.Equals(FileHash))
{
return(HashFileStatus.Mismatch);
}
return(HashFileStatus.Valid);
}
//Mining of block
public async Task MineBlock(int Difficulty)
{
var tempString = String.Empty;
await Task.Run(() =>
{
foreach (var item in Transactions)
{
tempString += item.ToString();
}
CurrentHash = CalculateHash(tempString);
//Proof of work i.e. first five characters of hash should be 0
while (CurrentHash.Substring(0, Difficulty) != new string('0', Difficulty))
{
Nounce++;
CurrentHash = CalculateHash(tempString);
}
});
}
public FileItem ToFileItem(byte[] previousHash)
=> new FileItem(Name, CurrentHash)
{
IsFileValid = CurrentHash.SequenceEqual(OriginalHash ?? GenerateHash(PreviousHash)),
IsBlockValid = GenerateHash(previousHash).SequenceEqual(OriginalHash ?? CurrentHash)
};
