//
// Create a new block with just given transactions, coinbase paying to
// scriptPubKey, and try to add it to the current chain.
//
CBlock
TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns, const CScript& scriptPubKey)
{
const CChainParams& chainparams = Params();
std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
CBlock& block = pblocktemplate->block;
// Replace mempool-selected txns with just coinbase plus passed-in txns:
block.vtx.resize(1);
for (const CMutableTransaction& tx : txns)
block.vtx.push_back(MakeTransactionRef(tx));
// IncrementExtraNonce creates a valid coinbase and merkleRoot
{
LOCK(cs_main);
unsigned int extraNonce = 0;
IncrementExtraNonce(&block, chainActive.Tip(), extraNonce);
}
while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(block);
ProcessNewBlock(chainparams, shared_pblock, true, nullptr);
CBlock result = block;
return result;
}
std::shared_ptr<CBlock> FinalizeBlock(std::shared_ptr<CBlock> pblock)
{
pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
while (!CheckProofOfWork(pblock->GetPoWHash(), pblock->nBits, Params().GetConsensus())) {
++(pblock->nNonce);
}
return pblock;
}
bool CheckBlockProofOfWork(const CBlockHeader *pblock)
{
if (!Params().AllowMinDifficultyBlocks() && (pblock->nVersion & BLOCK_VERSION_AUXPOW && pblock->GetChainID() != AUXPOW_CHAIN_ID))
return error("CheckBlockProofOfWork() : block does not have our chain ID");
if (pblock->auxpow.get() != NULL)
{
if (!pblock->auxpow->Check(pblock->GetHash(), pblock->GetChainID()))
return error("CheckBlockProofOfWork() : AUX POW is not valid");
// Check proof of work matches claimed amount
if (!CheckProofOfWork(pblock->auxpow->GetParentBlockHash(), pblock->nBits))
return error("CheckBlockProofOfWork() : AUX proof of work failed");
}
else
{
// Check proof of work matches claimed amount
if (!CheckProofOfWork(pblock->GetPoWHash(), pblock->nBits))
return error("CheckBlockProofOfWork() : proof of work failed");
}
return true;
}
static CTxIn MineBlock(const CScript& coinbase_scriptPubKey)
{
auto block = PrepareBlock(coinbase_scriptPubKey);
while (!CheckProofOfWork(block->GetHash(), block->nBits, Params().GetConsensus())) {
assert(++block->nNonce);
}
bool processed{ProcessNewBlock(Params(), block, true, nullptr)};
assert(processed);
return CTxIn{block->vtx[0]->GetHash(), 0};
}
UniValue generateBlocks(std::shared_ptr<CReserveScript> coinbaseScript, int nGenerate, uint64_t nMaxTries, bool keepScript)
{
static const int nInnerLoopCount = 0x10000;
int nHeightEnd = 0;
int nHeight = 0;
unsigned int profile = 0x3;
{ // Don't keep cs_main locked
LOCK(cs_main);
nHeight = chainActive.Height();
nHeightEnd = nHeight+nGenerate;
}
unsigned int nExtraNonce = 0;
UniValue blockHashes(UniValue::VARR);
while (nHeight < nHeightEnd && !ShutdownRequested())
{
std::unique_ptr<CBlockTemplate> pblocktemplate(BlockAssembler(Params()).CreateNewBlock(coinbaseScript->reserveScript));
if (!pblocktemplate.get())
throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
CBlock *pblock = &pblocktemplate->block;
{
LOCK(cs_main);
IncrementExtraNonce(pblock, chainActive.Tip(), nExtraNonce);
}
if (pblock->GetBlockTime() >= Params().GetConsensus().nNeoScryptFork)
profile = 0x0;
while (nMaxTries > 0 && pblock->nNonce < nInnerLoopCount && !CheckProofOfWork(pblock->GetPoWHash(profile), pblock->nBits, Params().GetConsensus())) {
++pblock->nNonce;
--nMaxTries;
}
if (nMaxTries == 0) {
break;
}
if (pblock->nNonce == nInnerLoopCount) {
continue;
}
std::shared_ptr<const CBlock> shared_pblock = std::make_shared<const CBlock>(*pblock);
if (!ProcessNewBlock(Params(), shared_pblock, true, nullptr))
throw JSONRPCError(RPC_INTERNAL_ERROR, "ProcessNewBlock, block not accepted");
++nHeight;
blockHashes.push_back(pblock->GetHash().GetHex());
//mark script as important because it was used at least for one coinbase output if the script came from the wallet
if (keepScript)
{
coinbaseScript->KeepScript();
}
}
return blockHashes;
}
/**
* Mine a block (assuming minimal difficulty) that either matches
* or doesn't match the difficulty target specified in the block header.
* @param block The block to mine (by updating nonce).
* @param ok Whether the block should be ok for PoW.
* @param nBits Use this as difficulty if specified.
*/
static void
mineBlock (CBlockHeader& block, bool ok, int nBits = -1)
{
if (nBits == -1)
nBits = block.nBits;
arith_uint256 target;
target.SetCompact (nBits);
block.nNonce = 0;
while (true)
{
const bool nowOk = (UintToArith256 (block.GetHash ()) <= target);
if ((ok && nowOk) || (!ok && !nowOk))
break;
++block.nNonce;
}
if (ok)
BOOST_CHECK (CheckProofOfWork (block.GetHash (), nBits, Params().GetConsensus()));
else
BOOST_CHECK (!CheckProofOfWork (block.GetHash (), nBits, Params().GetConsensus()));
}
//
// Create a new block with just given transactions, coinbase paying to
// scriptPubKey, and try to add it to the current chain.
//
CBlock
TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns, const CScript& scriptPubKey)
{
const CChainParams& chainparams = Params();
CBlockTemplate *pblocktemplate = CreateNewBlock(chainparams, scriptPubKey);
CBlock& block = pblocktemplate->block;
// Replace mempool-selected txns with just coinbase plus passed-in txns:
block.vtx.resize(1);
BOOST_FOREACH(const CMutableTransaction& tx, txns)
block.vtx.push_back(tx);
// IncrementExtraNonce creates a valid coinbase and merkleRoot
unsigned int extraNonce = 0;
IncrementExtraNonce(&block, chainActive.Tip(), extraNonce);
while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
ProcessNewBlock(chainparams, &block, true, NULL, NULL);
CBlock result = block;
delete pblocktemplate;
return result;
}
//
// Create a new block with just given transactions, coinbase paying to
// scriptPubKey, and try to add it to the current chain.
//
CBlock
TestChain100Setup::CreateAndProcessBlock(const std::vector<CMutableTransaction>& txns, const CScript& scriptPubKey)
{
const CChainParams& chainparams = Params();
std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler(chainparams).CreateNewBlock(scriptPubKey);
CBlock& block = pblocktemplate->block;
// Replace mempool-selected txns with just coinbase plus passed-in txns:
block.vtx.resize(1);
for (const CMutableTransaction& tx : txns)
block.vtx.push_back(tx);
// IncrementExtraNonce creates a valid coinbase and merkleRoot
unsigned int extraNonce = 0;
IncrementExtraNonce(&block, chainActive.Tip(), extraNonce);
while (!CheckProofOfWork(block.GetPoWHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
CValidationState state;
ProcessNewBlock(state, chainparams, NULL, &block, true, NULL, false);
CBlock result = block;
pblocktemplate.reset();
return result;
}
bool CBlockIndex::CheckIndex() const
{
return CheckProofOfWork(GetBlockHash(), nBits);
}