public string CalculateBlockHash(string previousBlockHash)
{
var blockHeader = BlockNumber + CreatedDate.ToString() + previousBlockHash;
var combined = merkleTree.RootNode + blockHeader;
string completeBlockHash;
if (KeyStore == null)
{
completeBlockHash = Convert.ToBase64String(Hashing.ComputeHashSha256(Encoding.UTF8.GetBytes(combined)));
}
else
{
completeBlockHash = Convert.ToBase64String(HMAC.ComputeHmacSha256(Encoding.UTF8.GetBytes(combined), KeyStore.AuthenticatedHashKey));
}
return(completeBlockHash);
}