public void CreateHigherLevelBlock(object source, ElapsedEventArgs e)
{
if (bank.s_LowerLevelBlockPool.Count == 0)
return;
//Construct high level block
HigherLevelBlock block = new HigherLevelBlock();
block.LowLevelBlockCounter = 0;
//Construct the block header
//block.blockHeader.hashPrevBlock = GetPreviousTransactionHash();
block.blockHeader.Time = GetTime(DateTime.Now);
block.blockHeader.Version = bank.version;
while (bank.s_LowerLevelBlockPool.Count != 0 && block.LowLevelBlockCounter < MAX_LOWERLEVELBLOCK)
{
LowerLevelBlock llb = bank.s_LowerLevelBlockPool.Dequeue();
if (CheckingLedger(llb) == true)
{
block.LowerLevelBlockSet.Add(llb);
block.LowLevelBlockCounter++;
}
}
//Add the hash & size of this block
block.Hash = CryptoHelper.Hash(JsonHelper.Serialize(block));
block.blockSize = Marshal.SizeOf(block);
//TODO: Call api to send ACK message to Issuer
}
public HigherLevelBlock AddHigherLevelBlock(HigherLevelBlock newHigherLevelBlock)
{
var result = QueryStoreProcedure("AddLowerLevelBlock", new Dictionary<string, object>
{
{"@blockSize", newHigherLevelBlock.blockSize },
{"@blockHeader", newHigherLevelBlock.blockHeader },
{"@LowerLevelBlockSet", newHigherLevelBlock.LowerLevelBlockSet },
{"@period", newHigherLevelBlock.Period },
{"@hash", newHigherLevelBlock.Hash },
{"@signature", newHigherLevelBlock.Signature },
});
if (result.Tables[0].Rows.Count > 0)
{
var hlb = new HigherLevelBlock().FromRow(result.Tables[0].Rows[0]);
return hlb;
}
return null;
}
/// <summary>
/// Verify HigherLevelBlock
/// </summary>
/// <param name="block"></param>
/// <param name="hashPrev"></param>
/// <param name="publicKey">PublicKey of the bank.</param>
/// <returns></returns>
public static bool VerifyHigherLevelBlock(HigherLevelBlock block, string hashPrev, string publicKey)
{
string hash = CryptoHelper.Hash(hashPrev + JsonHelper.Serialize(block.LowerLevelBlockSet[0].TransactionSet));
if (block.Hash == hash)
{
return CryptoHelper.Verify(publicKey, hash, block.Signature);
}
return false;
}