private Block createNextBlock(Block baseBlock, int nextBlockHeight, TransactionOutPointWithValue prevOut,
Money additionalCoinbaseValue)
{
int height = 0;
if (blockToHeightMap.TryGetValue(baseBlock.GetHash(), out height))
{
Assert.True(height == nextBlockHeight - 1);
}
var coinbaseValue = Network.GetReward(nextBlockHeight) + (additionalCoinbaseValue ?? Money.Zero);
Block block = baseBlock.CreateNextBlockWithCoinbase(coinbaseOutKeyPubKey, coinbaseValue);
if (prevOut != null)
{
Transaction t = new Transaction();
// Entirely invalid scriptPubKey to ensure we aren't pre-verifying too much
t.AddOutput(new TxOut(new Money(0), new Script(Op.GetPushOp(1))));
t.AddOutput(new TxOut(Money.Parse("1"),
new PayToPubkeyHashTemplate().GenerateScriptPubKey(coinbaseOutKeyPubKey)));
// Spendable output
t.AddOutput(new TxOut(Money.Zero, new Script(Op.GetPushOp(1))));
addOnlyInputToTransaction(t, prevOut);
block.AddTransaction(t);
block.ComputeMerkleRoot();
}
return(block);
}
private void addOnlyInputToTransaction(Transaction t, TransactionOutPointWithValue prevOut, uint sequence)
{
TxIn input = new TxIn(prevOut.outpoint)
{
ScriptSig = new Script(Op.GetPushOp(0))
};
input.Sequence = sequence;
t.AddInput(input);
var hash = prevOut.scriptPubKey.SignatureHash(t, 0, SigHash.All);
input.ScriptSig = new PayToPubkeyHashTemplate().GenerateScriptSig(new TransactionSignature(coinbaseOutKey.Sign(hash), SigHash.All), coinbaseOutKeyPubKey);
}
private void addOnlyInputToTransaction(Transaction t, TransactionOutPointWithValue prevOut)
{
addOnlyInputToTransaction(t, prevOut, TxIn.NO_SEQUENCE);
}
internal RuleList GetBlocksToTest(bool addSigExpensiveBlocks, bool runLargeReorgs)
{
List <Rule> blocks = new List <Rule>();
RuleList ret = new RuleList(blocks, hashHeaderMap, 10);
Queue <TransactionOutPointWithValue> spendableOutputs = new Queue <TransactionOutPointWithValue>();
int chainHeadHeight = 1;
Block chainHead = Network.GetGenesis().CreateNextBlockWithCoinbase(coinbaseOutKeyPubKey, Money.Parse("50"));
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, chainHead, true, false, chainHead.GetHash(), 1, "Initial Block"));
spendableOutputs.Enqueue(new TransactionOutPointWithValue(
new OutPoint(chainHead.Transactions[0].GetHash(), 0),
Money.Parse("50"), chainHead.Transactions[0].Outputs[0].ScriptPubKey));
for (int i = 1; i < Network.SpendableCoinbaseDepth; i++)
{
chainHead = chainHead.CreateNextBlockWithCoinbase(coinbaseOutKeyPubKey, Money.Parse("50"));
chainHeadHeight++;
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, chainHead, true, false, chainHead.GetHash(), i + 1, "Initial Block chain output generation"));
spendableOutputs.Enqueue(new TransactionOutPointWithValue(
new OutPoint(chainHead.Transactions[0].GetHash(), 0),
Money.Parse("50"), chainHead.Transactions.First().Outputs.First().ScriptPubKey));
}
// Start by building a couple of blocks on top of the genesis block.
Block b1 = createNextBlock(chainHead, chainHeadHeight + 1, spendableOutputs.Dequeue(), null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b1, true, false, b1.GetHash(), chainHeadHeight + 1, "b1"));
spendableOutputs.Enqueue(new TransactionOutPointWithValue(
new OutPoint(b1.Transactions[0].GetHash(), 0),
b1.Transactions[0].Outputs[0].Value,
b1.Transactions[0].Outputs[0].ScriptPubKey));
TransactionOutPointWithValue out1 = spendableOutputs.Dequeue();
Assert.True(out1 != null);
Block b2 = createNextBlock(b1, chainHeadHeight + 2, out1, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b2, true, false, b2.GetHash(), chainHeadHeight + 2, "b2"));
// Make sure nothing funky happens if we try to re-add b2
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b2, true, false, b2.GetHash(), chainHeadHeight + 2, "b2"));
spendableOutputs.Enqueue(new TransactionOutPointWithValue(
new OutPoint(b2.Transactions[0].GetHash(), 0),
b2.Transactions[0].Outputs[0].Value,
b2.Transactions[0].Outputs[0].ScriptPubKey));
// We now have the following chain (which output is spent is in parentheses):
// genesis -> b1 (0) -> b2 (1)
//
// so fork like this:
//
// genesis -> b1 (0) -> b2 (1)
// \-> b3 (1)
//
// Nothing should happen at this point. We saw b2 first so it takes priority.
Block b3 = createNextBlock(b1, chainHeadHeight + 2, out1, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b3, true, false, b2.GetHash(), chainHeadHeight + 2, "b3"));
// Make sure nothing breaks if we add b3 twice
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b3, true, false, b2.GetHash(), chainHeadHeight + 2, "b3"));
// Now we add another block to make the alternative chain longer.
TransactionOutPointWithValue out2 = spendableOutputs.Dequeue();
Assert.True(out2 != null);
Block b4 = createNextBlock(b3, chainHeadHeight + 3, out2, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b4, true, false, b4.GetHash(), chainHeadHeight + 3, "b4"));
//
// genesis -> b1 (0) -> b2 (1)
// \-> b3 (1) -> b4 (2)
//
// ... and back to the first chain.
Block b5 = createNextBlock(b2, chainHeadHeight + 3, out2, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b5, true, false, b4.GetHash(), chainHeadHeight + 3, "b5"));
spendableOutputs.Enqueue(new TransactionOutPointWithValue(
new OutPoint(b5.Transactions[0].GetHash(), 0),
b5.Transactions[0].Outputs[0].Value,
b5.Transactions[0].Outputs[0].ScriptPubKey));
TransactionOutPointWithValue out3 = spendableOutputs.Dequeue();
Block b6 = createNextBlock(b5, chainHeadHeight + 4, out3, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b6, true, false, b6.GetHash(), chainHeadHeight + 4, "b6"));
//
// genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
// \-> b3 (1) -> b4 (2)
//
// Try to create a fork that double-spends
// genesis -> b1 (0) -> b2 (1) -> b5 (2) -> b6 (3)
// \-> b7 (3) -> b8 (4)
// \-> b3 (1) -> b4 (2)
//
Block b7 = createNextBlock(b5, chainHeadHeight + 4, out2, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b7, true, false, b6.GetHash(), chainHeadHeight + 4, "b7"));
TransactionOutPointWithValue out4 = spendableOutputs.Dequeue();
Block b8 = createNextBlock(b7, chainHeadHeight + 5, out4, null);
blocks.Add(new BlockAndValidity(blockToHeightMap, hashHeaderMap, b8, false, true, b6.GetHash(), chainHeadHeight + 4, "b8"));
return(ret);
}
private Block createNextBlock(Block baseBlock, int nextBlockHeight, TransactionOutPointWithValue prevOut,
Money additionalCoinbaseValue)
{
int height = 0;
if(blockToHeightMap.TryGetValue(baseBlock.GetHash(), out height))
Assert.True(height == nextBlockHeight - 1);
var coinbaseValue = Network.GetReward(nextBlockHeight) + (additionalCoinbaseValue ?? Money.Zero);
Block block = baseBlock.CreateNextBlockWithCoinbase(coinbaseOutKeyPubKey, coinbaseValue);
if(prevOut != null)
{
Transaction t = new Transaction();
// Entirely invalid scriptPubKey to ensure we aren't pre-verifying too much
t.AddOutput(new TxOut(new Money(0), new Script(Op.GetPushOp(1))));
t.AddOutput(new TxOut(Money.Parse("1"),
new PayToPubkeyHashTemplate().GenerateScriptPubKey(coinbaseOutKeyPubKey)));
// Spendable output
t.AddOutput(new TxOut(Money.Zero, new Script(Op.GetPushOp(1))));
addOnlyInputToTransaction(t, prevOut);
block.AddTransaction(t);
block.ComputeMerkleRoot();
}
return block;
}
private void addOnlyInputToTransaction(Transaction t, TransactionOutPointWithValue prevOut, uint sequence)
{
TxIn input = new TxIn(prevOut.outpoint)
{
ScriptSig = new Script(Op.GetPushOp(0))
};
input.Sequence = sequence;
t.AddInput(input);
var hash = prevOut.scriptPubKey.SignatureHash(t, 0, SigHash.All);
input.ScriptSig = new PayToPubkeyHashTemplate().GenerateScriptSig(new TransactionSignature(coinbaseOutKey.Sign(hash), SigHash.All),coinbaseOutKeyPubKey);
}
private void addOnlyInputToTransaction(Transaction t, TransactionOutPointWithValue prevOut)
{
addOnlyInputToTransaction(t, prevOut, TxIn.NO_SEQUENCE);
}
