public void MerkleTreeTest()
{
// create chain, add transaction
SimpleBlockchain <Transaction> chain1 = new SimpleBlockchain <Transaction>();
chain1.add(new Transaction("A")).add(new Transaction("B")).add(new Transaction("C")).add(new Transaction("D"));
// get a block in chain
Block <Transaction> block = chain1.getHead();
Console.WriteLine("Merkle Hash tree :");
block.merkleTree().ForEach(i => Console.WriteLine(i + ","));
// get a transaction from block
Transaction tx = block.getTransactions()[0];
// see if hash is valid... using merkle Tree...
block.isTransactionValid(tx);
Assert.IsTrue(block.isTransactionValid(tx));
// mutate the transaction data
tx.setValue("Z");
Assert.IsFalse(block.isTransactionValid(tx));
}
public void ChainTest()
{
SimpleBlockchain <Transaction> chain1 = new SimpleBlockchain <Transaction>();
chain1.add(new Transaction("A")).add(new Transaction("B")).add(new Transaction("C"));
SimpleBlockchain <Transaction> chain2 = chain1.Clone();
chain1.add(new Transaction("D"));
Console.WriteLine(string.Format("Chain 1 Hash: {0}", chain1.getHead().getHash()));
Console.WriteLine(string.Format("Chain 2 Hash: {0}", chain2.getHead().getHash()));
Console.WriteLine(
string.Format("Chains Are In Sync: {0}", chain1.getHead().getHash().Equals(chain2.getHead().getHash())));
chain2.add(new Transaction("D"));
Console.WriteLine(string.Format("Chain 1 Hash: {0}", chain1.getHead().getHash()));
Console.WriteLine(string.Format("Chain 2 Hash: {0}", chain2.getHead().getHash()));
Console.WriteLine(
string.Format("Chains Are In Sync: {0}", chain1.getHead().getHash().Equals(chain2.getHead().getHash())));
Assert.IsTrue(chain1.blockChainHash().Equals(chain2.blockChainHash()));
Console.WriteLine("Current Chain Head Transactions: ");
foreach (Block <Transaction> block in chain1.chain)
{
block.getTransactions().ForEach(i => Console.WriteLine(i.toString()));
}
// Block Merkle root should equal root hash in Merkle Tree computed from block transactions
Block <Transaction> headBlock = chain1.getHead();
List <string> merkleTree = headBlock.merkleTree();
Assert.IsTrue(headBlock.getMerkleRoot().Equals(merkleTree[merkleTree.Count - 1]));
}