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Make validatelargetx test more accurate, reduce block size limit to 1MB for now.

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This commit is contained in:
Sean Bowe
2016-07-06 12:07:50 -06:00
parent 2ba9641767
commit 9c45b501ad
5 changed files with 51 additions and 170 deletions
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152
src/zcbenchmarks.cpp
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@@ -132,123 +132,61 @@ double benchmark_verify_equihash()
return timer_stop();
}
double benchmark_large_tx(bool testValidate)
double benchmark_large_tx()
{
// Note that the transaction size is checked against the splitting
// transaction, not the merging one. Thus we are assuming that transactions
// with 1 input and N outputs are about the same size as transactions with
// N inputs and 1 output.
mapArgs["-blockmaxsize"] = itostr(MAX_BLOCK_SIZE);
int nMaxBlockSize = MAX_BLOCK_SIZE-1000;
// Number of inputs in the spending transaction that we will simulate
const size_t NUM_INPUTS = 5550;
std::vector<COutput> vCoins;
pwalletMain->AvailableCoins(vCoins, true);
// Create priv/pub key
CKey priv;
priv.MakeNewKey(false);
auto pub = priv.GetPubKey();
CBasicKeyStore tempKeystore;
tempKeystore.AddKey(priv);
// 1) Create a transaction splitting the first coinbase to many outputs
CMutableTransaction mtx;
mtx.vin.resize(1);
mtx.vin[0].prevout.hash = vCoins[0].tx->GetHash();
mtx.vin[0].prevout.n = 0;
mtx.vout.resize(1);
mtx.vout[0].scriptPubKey = vCoins[0].tx->vout[0].scriptPubKey;
mtx.vout[0].nValue = 1000;
SignSignature(*pwalletMain, *vCoins[0].tx, mtx, 0);
// The "original" transaction that the spending transaction will spend
// from.
CMutableTransaction m_orig_tx;
m_orig_tx.vout.resize(1);
m_orig_tx.vout[0].nValue = 1000000;
CScript prevPubKey = GetScriptForDestination(pub.GetID());
m_orig_tx.vout[0].scriptPubKey = prevPubKey;
// 1a) While the transaction is smaller than the maximum:
CTransaction tx {mtx};
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
while (nTxSize < nMaxBlockSize) {
// 1b) Add another output
size_t oldSize = mtx.vout.size();
mtx.vout.resize(oldSize+1);
mtx.vout[oldSize].scriptPubKey = vCoins[0].tx->vout[0].scriptPubKey;
mtx.vout[oldSize].nValue = 1000;
auto orig_tx = CTransaction(m_orig_tx);
tx = mtx;
nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
CMutableTransaction spending_tx;
auto input_hash = orig_tx.GetHash();
// Add NUM_INPUTS inputs
for (size_t i = 0; i < NUM_INPUTS; i++) {
spending_tx.vin.emplace_back(input_hash, 0);
}
// 1c) Sign the splitting transaction
SignSignature(*pwalletMain, *vCoins[0].tx, mtx, 0);
uint256 hash = mtx.GetHash();
mempool.clear();
mempool.addUnchecked(hash, CTxMemPoolEntry(mtx, 11, GetTime(), 111.0, 11));
// 2) Mine the splitting transaction into a block
CScript scriptDummy = CScript() << OP_TRUE;
CBlockTemplate* pblocktemplate = CreateNewBlock(scriptDummy);
CBlock *pblock = &pblocktemplate->block;
CBlockIndex* pindexPrev = chainActive.Tip();
unsigned int nExtraNonce = 0;
IncrementExtraNonce(pblock, pindexPrev, nExtraNonce);
arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits);
unsigned int n = Params().EquihashN();
unsigned int k = Params().EquihashK();
crypto_generichash_blake2b_state eh_state;
EhInitialiseState(n, k, eh_state);
CEquihashInput I{*pblock};
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
ss << I;
crypto_generichash_blake2b_update(&eh_state, (unsigned char*)&ss[0], ss.size());
while (true) {
crypto_generichash_blake2b_state curr_state;
curr_state = eh_state;
crypto_generichash_blake2b_update(&curr_state,
pblock->nNonce.begin(),
pblock->nNonce.size());
std::set<std::vector<unsigned int>> solns;
EhOptimisedSolve(n, k, curr_state, solns);
for (auto soln : solns) {
pblock->nSolution = soln;
if (UintToArith256(pblock->GetHash()) > hashTarget) {
continue;
}
goto processblock;
}
pblock->nNonce = ArithToUint256(UintToArith256(pblock->nNonce) + 1);
// Sign for all the inputs
for (size_t i = 0; i < NUM_INPUTS; i++) {
SignSignature(tempKeystore, prevPubKey, spending_tx, i, SIGHASH_ALL);
}
processblock:
CValidationState state;
assert(ProcessNewBlock(state, NULL, pblock, true, NULL));
// Serialize:
{
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
ss << spending_tx;
//std::cout << "SIZE OF SPENDING TX: " << ss.size() << std::endl;
auto error = MAX_BLOCK_SIZE / 20; // 5% error
assert(ss.size() < MAX_BLOCK_SIZE + error);
assert(ss.size() > MAX_BLOCK_SIZE - error);
}
// Benchmark signature verification costs:
timer_start();
// 3) Create a transaction that merges all of the inputs
CMutableTransaction mtx2;
mtx2.vin.resize(mtx.vout.size());
mtx2.vout.resize(1);
mtx2.vout[0].scriptPubKey = vCoins[0].tx->vout[0].scriptPubKey;
mtx2.vout[0].nValue = 0;
for (int i = 0; i < mtx2.vin.size(); i++) {
mtx2.vin[i].prevout.hash = hash;
mtx2.vin[i].prevout.n = i;
for (size_t i = 0; i < NUM_INPUTS; i++) {
ScriptError serror = SCRIPT_ERR_OK;
assert(VerifyScript(spending_tx.vin[i].scriptSig,
prevPubKey,
STANDARD_SCRIPT_VERIFY_FLAGS,
MutableTransactionSignatureChecker(&spending_tx, i),
&serror));
}
for (int i = 0; i < mtx2.vin.size(); i++) {
SignSignature(*pwalletMain, mtx, mtx2, i);
}
double ret = timer_stop();
delete pblocktemplate;
if (!testValidate)
return ret;
hash = mtx2.GetHash();
mempool.addUnchecked(hash, CTxMemPoolEntry(mtx2, 11, GetTime(), 111.0, 11));
// 4) Call CreateNewBlock (which itself calls TestBlockValidity)
pblocktemplate = CreateNewBlock(scriptDummy);
pblock = &pblocktemplate->block;
pindexPrev = chainActive.Tip();
// 5) Call TestBlockValidity again under timing
timer_start();
assert(TestBlockValidity(state, *pblock, pindexPrev, false, false));
ret = timer_stop();
delete pblocktemplate;
mempool.clear();
return ret;
return timer_stop();
}