public void TxMempoolBlockDoublespend()
{
using (NodeBuilder builder = NodeBuilder.Create(this))
{
CoreNode stratisNodeSync = builder.CreateStratisPowNode();
builder.StartAll();
stratisNodeSync.NotInIBD();
stratisNodeSync.FullNode.NodeService <MempoolSettings>().RequireStandard = true; // make sure to test standard tx
stratisNodeSync.SetDummyMinerSecret(new BitcoinSecret(new Key(), stratisNodeSync.FullNode.Network));
stratisNodeSync.GenerateStratisWithMiner(100); // coinbase maturity = 100
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.ConsensusLoop().Tip.HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.GetBlockStoreTip().HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
// Make sure skipping validation of transctions that were
// validated going into the memory pool does not allow
// double-spends in blocks to pass validation when they should not.
Script scriptPubKey = PayToPubkeyHashTemplate.Instance.GenerateScriptPubKey(stratisNodeSync.MinerSecret.PubKey);
Block genBlock = stratisNodeSync.FullNode.BlockStoreManager().BlockRepository.GetAsync(stratisNodeSync.FullNode.Chain.GetBlock(1).HashBlock).Result;
// Create a double-spend of mature coinbase txn:
var spends = new List <Transaction>(2);
foreach (int index in Enumerable.Range(1, 2))
{
Transaction trx = stratisNodeSync.FullNode.Network.CreateTransaction();
trx.AddInput(new TxIn(new OutPoint(genBlock.Transactions[0].GetHash(), 0), scriptPubKey));
trx.AddOutput(Money.Cents(11), new Key().PubKey.Hash);
// Sign:
trx.Sign(stratisNodeSync.FullNode.Network, stratisNodeSync.MinerSecret, false);
spends.Add(trx);
}
// Test 1: block with both of those transactions should be rejected.
Block block = stratisNodeSync.GenerateStratis(1, spends).Single();
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.ConsensusLoop().Tip.HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
Assert.True(stratisNodeSync.FullNode.Chain.Tip.HashBlock != block.GetHash());
// Test 2: ... and should be rejected if spend1 is in the memory pool
Assert.True(stratisNodeSync.AddToStratisMempool(spends[0]));
block = stratisNodeSync.GenerateStratis(1, spends).Single();
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.ConsensusLoop().Tip.HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
Assert.True(stratisNodeSync.FullNode.Chain.Tip.HashBlock != block.GetHash());
stratisNodeSync.FullNode.MempoolManager().Clear().Wait();
// Test 3: ... and should be rejected if spend2 is in the memory pool
Assert.True(stratisNodeSync.AddToStratisMempool(spends[1]));
block = stratisNodeSync.GenerateStratis(1, spends).Single();
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.ConsensusLoop().Tip.HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
Assert.True(stratisNodeSync.FullNode.Chain.Tip.HashBlock != block.GetHash());
stratisNodeSync.FullNode.MempoolManager().Clear().Wait();
// Final sanity test: first spend in mempool, second in block, that's OK:
var oneSpend = new List <Transaction>();
oneSpend.Add(spends[0]);
Assert.True(stratisNodeSync.AddToStratisMempool(spends[1]));
block = stratisNodeSync.GenerateStratis(1, oneSpend).Single();
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.ConsensusLoop().Tip.HashBlock == stratisNodeSync.FullNode.Chain.Tip.HashBlock);
Assert.True(stratisNodeSync.FullNode.Chain.Tip.HashBlock == block.GetHash());
// spends[1] should have been removed from the mempool when the
// block with spends[0] is accepted:
TestHelper.WaitLoop(() => stratisNodeSync.FullNode.MempoolManager().MempoolSize().Result == 0);
}
}