// Copyright (c) 2014-2021 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <clientversion.h>
#include <coins.h>
#include <script/standard.h>
#include <streams.h>
#include <test/util/setup_common.h>
#include <txdb.h>
#include <uint256.h>
#include <undo.h>
#include <util/strencodings.h>
#include <map>
#include <vector>
#include <boost/test/unit_test.hpp>
int ApplyTxInUndo(Coin&& undo, CCoinsViewCache& view, const COutPoint& out);
void UpdateCoins(const CTransaction& tx, CCoinsViewCache& inputs, CTxUndo &txundo, int nHeight);
namespace
{
//! equality test
bool operator==(const Coin &a, const Coin &b) {
// Empty Coin objects are always equal.
if (a.IsSpent() && b.IsSpent()) return true;
return a.fCoinBase == b.fCoinBase &&
a.nHeight == b.nHeight &&
a.out == b.out;
}
class CCoinsViewTest : public CCoinsView
{
uint256 hashBestBlock_;
std::map<COutPoint, Coin> map_;
public:
[[nodiscard]] bool GetCoin(const COutPoint& outpoint, Coin& coin) const override
{
std::map<COutPoint, Coin>::const_iterator it = map_.find(outpoint);
if (it == map_.end()) {
return false;
}
coin = it->second;
if (coin.IsSpent() && InsecureRandBool() == 0) {
// Randomly return false in case of an empty entry.
return false;
}
return true;
}
uint256 GetBestBlock() const override { return hashBestBlock_; }
bool BatchWrite(CCoinsMap& mapCoins, const uint256& hashBlock) override
{
for (CCoinsMap::iterator it = mapCoins.begin(); it != mapCoins.end(); ) {
if (it->second.flags & CCoinsCacheEntry::DIRTY) {
// Same optimization used in CCoinsViewDB is to only write dirty entries.
map_[it->first] = it->second.coin;
if (it->second.coin.IsSpent() && InsecureRandRange(3) == 0) {
// Randomly delete empty entries on write.
map_.erase(it->first);
}
}
mapCoins.erase(it++);
}
if (!hashBlock.IsNull())
hashBestBlock_ = hashBlock;
return true;
}
};
class CCoinsViewCacheTest : public CCoinsViewCache
{
public:
explicit CCoinsViewCacheTest(CCoinsView* _base) : CCoinsViewCache(_base) {}
void SelfTest() const
{
// Manually recompute the dynamic usage of the whole data, and compare it.
size_t ret = memusage::DynamicUsage(cacheCoins);
size_t count = 0;
for (const auto& entry : cacheCoins) {
ret += entry.second.coin.DynamicMemoryUsage();
++count;
}
BOOST_CHECK_EQUAL(GetCacheSize(), count);
BOOST_CHECK_EQUAL(DynamicMemoryUsage(), ret);
}
CCoinsMap& map() const { return cacheCoins; }
size_t& usage() const { return cachedCoinsUsage; }
};
} // namespace
BOOST_FIXTURE_TEST_SUITE(coins_tests, BasicTestingSetup)
static const unsigned int NUM_SIMULATION_ITERATIONS = 40000;
// This is a large randomized insert/remove simulation test on a variable-size
// stack of caches on top of CCoinsViewTest.
//
// It will randomly create/update/delete Coin entries to a tip of caches, with
// txids picked from a limited list of random 256-bit hashes. Occasionally, a
// new tip is added to the stack of caches, or the tip is flushed and removed.
//
// During the process, booleans are kept to make sure that the randomized
// operation hits all branches.
//
// If fake_best_block is true, assign a random uint256 to mock the recording
// of best block on flush. This is necessary when using CCoinsViewDB as the base,
// otherwise we'll hit an assertion in BatchWrite.
//
void SimulationTest(CCoinsView* base, bool fake_best_block)
{
// Various coverage trackers.
bool removed_all_caches = false;
bool reached_4_caches = false;
bool added_an_entry = false;
bool added_an_unspendable_entry = false;
bool removed_an_entry = false;
bool updated_an_entry = false;
bool found_an_entry = false;
bool missed_an_entry = false;
bool uncached_an_entry = false;
// A simple map to track what we expect the cache stack to represent.
std::map<COutPoint, Coin> result;
// The cache stack.
std::vector<CCoinsViewCacheTest*> stack; // A stack of CCoinsViewCaches on top.
stack.push_back(new CCoinsViewCacheTest(base)); // Start with one cache.
// Use a limited set of random transaction ids, so we do test overwriting entries.
std::vector<uint256> txids;
txids.resize(NUM_SIMULATION_ITERATIONS / 8);
for (unsigned int i = 0; i < txids.size(); i++) {
txids[i] = InsecureRand256();
}
for (unsigned int i = 0; i < NUM_SIMULATION_ITERATIONS; i++) {
// Do a random modification.
{
uint256 txid = txids[InsecureRandRange(txids.size())]; // txid we're going to modify in this iteration.
Coin& coin = result[COutPoint(txid, 0)];
// Determine whether to test HaveCoin before or after Access* (or both). As these functions
// can influence each other's behaviour by pulling things into the cache, all combinations
// are tested.
bool test_havecoin_before = InsecureRandBits(2) == 0;
bool test_havecoin_after = InsecureRandBits(2) == 0;
bool result_havecoin = test_havecoin_before ? stack.back()->HaveCoin(COutPoint(txid, 0)) : false;
const Coin& entry = (InsecureRandRange(500) == 0) ? AccessByTxid(*stack.back(), txid) : stack.back()->AccessCoin(COutPoint(txid, 0));
BOOST_CHECK(coin == entry);
BOOST_CHECK(!test_havecoin_before || result_havecoin == !entry.IsSpent());
if (test_havecoin_after) {
bool ret = stack.back()->HaveCoin(COutPoint(txid, 0));
BOOST_CHECK(ret == !entry.IsSpent());
}
if (InsecureRandRange(5) == 0 || coin.IsSpent()) {
Coin newcoin;
newcoin.out.nValue = InsecureRand32();
newcoin.nHeight = 1;
if (InsecureRandRange(16) == 0 && coin.IsSpent()) {
newcoin.out.scriptPubKey.assign(1 + InsecureRandBits(6), OP_RETURN);
BOOST_CHECK(newcoin.out.scriptPubKey.IsUnspendable());
added_an_unspendable_entry = true;
} else {
newcoin.out.scriptPubKey.assign(InsecureRandBits(6), 0); // Random sizes so we can test memory usage accounting
(coin.IsSpent() ? added_an_entry : updated_an_entry) = true;
coin = newcoin;
}
stack.back()->AddCoin(COutPoint(txid, 0), std::move(newcoin), !coin.IsSpent() || InsecureRand32() & 1);
} else {
removed_an_entry = true;
coin.Clear();
BOOST_CHECK(stack.back()->SpendCoin(COutPoint(txid, 0)));
}
}
// One every 10 iterations, remove a random entry from the cache
if (InsecureRandRange(10) == 0) {
COutPoint out(txids[InsecureRand32() % txids.size()], 0);
int cacheid = InsecureRand32() % stack.size();
stack[cacheid]->Uncache(out);
uncached_an_entry |= !stack[cacheid]->HaveCoinInCache(out);
}
// Once every 1000 iterations and at the end, verify the full cache.
if (InsecureRandRange(1000) == 1 || i == NUM_SIMULATION_ITERATIONS - 1) {
for (const auto& entry : result) {
bool have = stack.back()->HaveCoin(entry.first);
const Coin& coin = stack.back()->AccessCoin(entry.first);
BOOST_CHECK(have == !coin.IsSpent());
BOOST_CHECK(coin == entry.second);
if (coin.IsSpent()) {
missed_an_entry = true;
} else {
BOOST_CHECK(stack.back()->HaveCoinInCache(entry.first));
found_an_entry = true;
}
}
for (const CCoinsViewCacheTest *test : stack) {
test->SelfTest();
}
}
if (InsecureRandRange(100) == 0) {
// Every 100 iterations, flush an intermediate cache
if (stack.size() > 1 && InsecureRandBool() == 0) {
unsigned int flushIndex = InsecureRandRange(stack.size() - 1);
if (fake_best_block) stack[flushIndex]->SetBestBlock(InsecureRand256());
BOOST_CHECK(stack[flushIndex]->Flush());
}
}
if (InsecureRandRange(100) == 0) {
// Every 100 iterations, change the cache stack.
if (stack.size() > 0 && InsecureRandBool() == 0) {
//Remove the top cache
if (fake_best_block) stack.back()->SetBestBlock(InsecureRand256());
BOOST_CHECK(stack.back()->Flush());
delete stack.back();
stack.pop_back();
}
if (stack.size() == 0 || (stack.size() < 4 && InsecureRandBool())) {
//Add a new cache
CCoinsView* tip = base;
if (stack.size() > 0) {
tip = stack.back();
} else {
removed_all_caches = true;
}
stack.push_back(new CCoinsViewCacheTest(tip));
if (stack.size() == 4) {
reached_4_caches = true;
}
}
}
}
// Clean up the stack.
while (stack.size() > 0) {
delete stack.back();
stack.pop_back();
}
// Verify coverage.
BOOST_CHECK(removed_all_caches);
BOOST_CHECK(reached_4_caches);
BOOST_CHECK(added_an_entry);
BOOST_CHECK(added_an_unspendable_entry);
BOOST_CHECK(removed_an_entry);
BOOST_CHECK(updated_an_entry);
BOOST_CHECK(found_an_entry);
BOOST_CHECK(missed_an_entry);
BOOST_CHECK(uncached_an_entry);
}
// Run the above simulation for multiple base types.
BOOST_AUTO_TEST_CASE(coins_cache_simulation_test)
{
CCoinsViewTest base;
SimulationTest(&base, false);
CCoinsViewDB db_base{"test", /*nCacheSize=*/1 << 23, /*fMemory=*/true, /*fWipe=*/false};
SimulationTest(&db_base, true);
}
// Store of all necessary tx and undo data for next test
typedef std::map<COutPoint, std::tuple<CTransaction,CTxUndo,Coin>> UtxoData;
UtxoData utxoData;
UtxoData::iterator FindRandomFrom(const std::set<COutPoint> &utxoSet) {
assert(utxoSet.size());
auto utxoSetIt = utxoSet.lower_bound(COutPoint(InsecureRand256(), 0));
if (utxoSetIt == utxoSet.end()) {
utxoSetIt = utxoSet.begin();
}
auto utxoDataIt = utxoData.find(*utxoSetIt);
assert(utxoDataIt != utxoData.end());
return utxoDataIt;
}
// This test is similar to the previous test
// except the emphasis is on testing the functionality of UpdateCoins
// random txs are created and UpdateCoins is used to update the cache stack
// In particular it is tested that spending a duplicate coinbase tx
// has the expected effect (the other duplicate is overwritten at all cache levels)
BOOST_AUTO_TEST_CASE(updatecoins_simulation_test)
{
SeedInsecureRand(SeedRand::ZEROS);
g_mock_deterministic_tests = true;
bool spent_a_duplicate_coinbase = false;
// A simple map to track what we expect the cache stack to represent.
std::map<COutPoint, Coin> result;
// The cache stack.
CCoinsViewTest base; // A CCoinsViewTest at the bottom.
std::vector<CCoinsViewCacheTest*> stack; // A stack of CCoinsViewCaches on top.
stack.push_back(new CCoinsViewCacheTest(&base)); // Start with one cache.
// Track the txids we've used in various sets
std::set<COutPoint> coinbase_coins;
std::set<COutPoint> disconnected_coins;
std::set<COutPoint> duplicate_coins;
std::set<COutPoint> utxoset;
for (unsigned int i = 0; i < NUM_SIMULATION_ITERATIONS; i++) {
uint32_t randiter = InsecureRand32();
// 19/20 txs add a new transaction
if (randiter % 20 < 19) {
CMutableTransaction tx;
tx.vin.resize(1);
tx.vout.resize(1);
tx.vout[0].nValue = i; //Keep txs unique unless intended to duplicate
tx.vout[0].scriptPubKey.assign(InsecureRand32() & 0x3F, 0); // Random sizes so we can test memory usage accounting
const int height{int(InsecureRand32() >> 1)};
Coin old_coin;
// 2/20 times create a new coinbase
if (randiter % 20 < 2 || coinbase_coins.size() < 10) {
// 1/10 of those times create a duplicate coinbase
if (InsecureRandRange(10) == 0 && coinbase_coins.size()) {
auto utxod = FindRandomFrom(coinbase_coins);
// Reuse the exact same coinbase
tx = CMutableTransaction{std::get<0>(utxod->second)};
// shouldn't be available for reconnection if it's been duplicated
disconnected_coins.erase(utxod->first);
duplicate_coins.insert(utxod->first);
}
else {
coinbase_coins.insert(COutPoint(tx.GetHash(), 0));
}
assert(CTransaction(tx).IsCoinBase());
}
// 17/20 times reconnect previous or add a regular tx
else {
COutPoint prevout;
// 1/20 times reconnect a previously disconnected tx
if (randiter % 20 == 2 && disconnected_coins.size()) {
auto utxod = FindRandomFrom(disconnected_coins);
tx = CMutableTransaction{std::get<0>(utxod->second)};
prevout = tx.vin[0].prevout;
if (!CTransaction(tx).IsCoinBase() && !utxoset.count(prevout)) {
disconnected_coins.erase(utxod->first);
continue;
}
// If this tx is already IN the UTXO, then it must be a coinbase, and it must be a duplicate
if (utxoset.count(utxod->first)) {
assert(CTransaction(tx).IsCoinBase());
assert(duplicate_coins.count(utxod->first));
}
disconnected_coins.erase(utxod->first);
}
// 16/20 times create a regular tx
else {
auto utxod = FindRandomFrom(utxoset);
prevout = utxod->first;
// Construct the tx to spend the coins of prevouthash
tx.vin[0].prevout = prevout;
assert(!CTransaction(tx).IsCoinBase());
}
// In this simple test coins only have two states, spent or unspent, save the unspent state to restore
old_coin = result[prevout];
// Update the expected result of prevouthash to know these coins are spent
result[prevout].Clear();
utxoset.erase(prevout);
// The test is designed to ensure spending a duplicate coinbase will work properly
// if that ever happens and not resurrect the previously overwritten coinbase
if (duplicate_coins.count(prevout)) {
spent_a_duplicate_coinbase = true;
}
}
// Update the expected result to know about the new output coins
assert(tx.vout.size() == 1);
const COutPoint outpoint(tx.GetHash(), 0);
result[outpoint] = Coin{tx.vout[0], height, CTransaction{tx}.IsCoinBase()};
// Call UpdateCoins on the top cache
CTxUndo undo;
UpdateCoins(CTransaction{tx}, *(stack.back()), undo, height);
// Update the utxo set for future spends
utxoset.insert(outpoint);
// Track this tx and undo info to use later
utxoData.emplace(outpoint, std::make_tuple(tx,undo,old_coin));
} else if (utxoset.size()) {
//1/20 times undo a previous transaction
auto utxod = FindRandomFrom(utxoset);
CTransaction &tx = std::get<0>(utxod->second);
CTxUndo &undo = std::get<1>(utxod->second);
Coin &orig_coin = std::get<2>(utxod->second);
// Update the expected result
// Remove new outputs
result[utxod->first].Clear();
// If not coinbase restore prevout
if (!tx.IsCoinBase()) {
result[tx.vin[0].prevout] = orig_coin;
}
// Disconnect the tx from the current UTXO
// See code in DisconnectBlock
// remove outputs
BOOST_CHECK(stack.back()->SpendCoin(utxod->first));
// restore inputs
if (!tx.IsCoinBase()) {
const COutPoint &out = tx.vin[0].prevout;
Coin coin = undo.vprevout[0];
ApplyTxInUndo(std::move(coin), *(stack.back()), out);
}
// Store as a candidate for reconnection
disconnected_coins.insert(utxod->first);
// Update the utxoset
utxoset.erase(utxod->first);
if (!tx.IsCoinBase())
utxoset.insert(tx.vin[0].prevout);
}
// Once every 1000 iterations and at the end, verify the full cache.
if (InsecureRandRange(1000) == 1 || i == NUM_SIMULATION_ITERATIONS - 1) {
for (const auto& entry : result) {
bool have = stack.back()->HaveCoin(entry.first);
const Coin& coin = stack.back()->AccessCoin(entry.first);
BOOST_CHECK(have == !coin.IsSpent());
BOOST_CHECK(coin == entry.second);
}
}
// One every 10 iterations, remove a random entry from the cache
if (utxoset.size() > 1 && InsecureRandRange(30) == 0) {
stack[InsecureRand32() % stack.size()]->Uncache(FindRandomFrom(utxoset)->first);
}
if (disconnected_coins.size() > 1 && InsecureRandRange(30) == 0) {
stack[InsecureRand32() % stack.size()]->Uncache(FindRandomFrom(disconnected_coins)->first);
}
if (duplicate_coins.size() > 1 && InsecureRandRange(30) == 0) {
stack[InsecureRand32() % stack.size()]->Uncache(FindRandomFrom(duplicate_coins)->first);
}
if (InsecureRandRange(100) == 0) {
// Every 100 iterations, flush an intermediate cache
if (stack.size() > 1 && InsecureRandBool() == 0) {
unsigned int flushIndex = InsecureRandRange(stack.size() - 1);
BOOST_CHECK(stack[flushIndex]->Flush());
}
}
if (InsecureRandRange(100) == 0) {
// Every 100 iterations, change the cache stack.
if (stack.size() > 0 && InsecureRandBool() == 0) {
BOOST_CHECK(stack.back()->Flush());
delete stack.back();
stack.pop_back();
}
if (stack.size() == 0 || (stack.size() < 4 && InsecureRandBool())) {
CCoinsView* tip = &base;
if (stack.size() > 0) {
tip = stack.back();
}
stack.push_back(new CCoinsViewCacheTest(tip));
}
}
}
// Clean up the stack.
while (stack.size() > 0) {
delete stack.back();
stack.pop_back();
}
// Verify coverage.
BOOST_CHECK(spent_a_duplicate_coinbase);
g_mock_deterministic_tests = false;
}
BOOST_AUTO_TEST_CASE(ccoins_serialization)
{
// Good example
CDataStream ss1(ParseHex("97f23c835800816115944e077fe7c803cfa57f29b36bf87c1d35"), SER_DISK, CLIENT_VERSION);
Coin cc1;
ss1 >> cc1;
BOOST_CHECK_EQUAL(cc1.fCoinBase, false);
BOOST_CHECK_EQUAL(cc1.nHeight, 203998U);
BOOST_CHECK_EQUAL(cc1.out.nValue, CAmount{60000000000});
BOOST_CHECK_EQUAL(HexStr(cc1.out.scriptPubKey), HexStr(GetScriptForDestination(PKHash(uint160(ParseHex("816115944e077fe7c803cfa57f29b36bf87c1d35"))))));
// Good example
CDataStream ss2(ParseHex("8ddf77bbd123008c988f1a4a4de2161e0f50aac7f17e7f9555caa4"), SER_DISK, CLIENT_VERSION);
Coin cc2;
ss2 >> cc2;
BOOST_CHECK_EQUAL(cc2.fCoinBase, true);
BOOST_CHECK_EQUAL(cc2.nHeight, 120891U);
BOOST_CHECK_EQUAL(cc2.out.nValue, 110397);
BOOST_CHECK_EQUAL(HexStr(cc2.out.scriptPubKey), HexStr(GetScriptForDestination(PKHash(uint160(ParseHex("8c988f1a4a4de2161e0f50aac7f17e7f9555caa4"))))));
// Smallest possible example
CDataStream ss3(ParseHex("000006"), SER_DISK, CLIENT_VERSION);
Coin cc3;
ss3 >> cc3;
BOOST_CHECK_EQUAL(cc3.fCoinBase, false);
BOOST_CHECK_EQUAL(cc3.nHeight, 0U);
BOOST_CHECK_EQUAL(cc3.out.nValue, 0);
BOOST_CHECK_EQUAL(cc3.out.scriptPubKey.size(), 0U);
// scriptPubKey that ends beyond the end of the stream
CDataStream ss4(ParseHex("000007"), SER_DISK, CLIENT_VERSION);
try {
Coin cc4;
ss4 >> cc4;
BOOST_CHECK_MESSAGE(false, "We should have thrown");
} catch (const std::ios_base::failure&) {
}
// Very large scriptPubKey (3*10^9 bytes) past the end of the stream
CDataStream tmp(SER_DISK, CLIENT_VERSION);
uint64_t x = 3000000000ULL;
tmp << VARINT(x);
BOOST_CHECK_EQUAL(HexStr(tmp), "8a95c0bb00");
CDataStream ss5(ParseHex("00008a95c0bb00"), SER_DISK, CLIENT_VERSION);
try {
Coin cc5;
ss5 >> cc5;
BOOST_CHECK_MESSAGE(false, "We should have thrown");
} catch (const std::ios_base::failure&) {
}
}
const static COutPoint OUTPOINT;
const static CAmount SPENT = -1;
const static CAmount ABSENT = -2;
const static CAmount FAIL = -3;
const static CAmount VALUE1 = 100;
const static CAmount VALUE2 = 200;
const static CAmount VALUE3 = 300;
const static char DIRTY = CCoinsCacheEntry::DIRTY;
const static char FRESH = CCoinsCacheEntry::FRESH;
const static char NO_ENTRY = -1;
const static auto FLAGS = {char(0), FRESH, DIRTY, char(DIRTY | FRESH)};
const static auto CLEAN_FLAGS = {char(0), FRESH};
const static auto ABSENT_FLAGS = {NO_ENTRY};
static void SetCoinsValue(CAmount value, Coin& coin)
{
assert(value != ABSENT);
coin.Clear();
assert(coin.IsSpent());
if (value != SPENT) {
coin.out.nValue = value;
coin.nHeight = 1;
assert(!coin.IsSpent());
}
}
static size_t InsertCoinsMapEntry(CCoinsMap& map, CAmount value, char flags)
{
if (value == ABSENT) {
assert(flags == NO_ENTRY);
return 0;
}
assert(flags != NO_ENTRY);
CCoinsCacheEntry entry;
entry.flags = flags;
SetCoinsValue(value, entry.coin);
auto inserted = map.emplace(OUTPOINT, std::move(entry));
assert(inserted.second);
return inserted.first->second.coin.DynamicMemoryUsage();
}
void GetCoinsMapEntry(const CCoinsMap& map, CAmount& value, char& flags)
{
auto it = map.find(OUTPOINT);
if (it == map.end()) {
value = ABSENT;
flags = NO_ENTRY;
} else {
if (it->second.coin.IsSpent()) {
value = SPENT;
} else {
value = it->second.coin.out.nValue;
}
flags = it->second.flags;
assert(flags != NO_ENTRY);
}
}
void WriteCoinsViewEntry(CCoinsView& view, CAmount value, char flags)
{
CCoinsMap map;
InsertCoinsMapEntry(map, value, flags);
BOOST_CHECK(view.BatchWrite(map, {}));
}
class SingleEntryCacheTest
{
public:
SingleEntryCacheTest(CAmount base_value, CAmount cache_value, char cache_flags)
{
WriteCoinsViewEntry(base, base_value, base_value == ABSENT ? NO_ENTRY : DIRTY);
cache.usage() += InsertCoinsMapEntry(cache.map(), cache_value, cache_flags);
}
CCoinsView root;
CCoinsViewCacheTest base{&root};
CCoinsViewCacheTest cache{&base};
};
static void CheckAccessCoin(CAmount base_value, CAmount cache_value, CAmount expected_value, char cache_flags, char expected_flags)
{
SingleEntryCacheTest test(base_value, cache_value, cache_flags);
test.cache.AccessCoin(OUTPOINT);
test.cache.SelfTest();
CAmount result_value;
char result_flags;
GetCoinsMapEntry(test.cache.map(), result_value, result_flags);
BOOST_CHECK_EQUAL(result_value, expected_value);
BOOST_CHECK_EQUAL(result_flags, expected_flags);
}
BOOST_AUTO_TEST_CASE(ccoins_access)
{
/* Check AccessCoin behavior, requesting a coin from a cache view layered on
* top of a base view, and checking the resulting entry in the cache after
* the access.
*
* Base Cache Result Cache Result
* Value Value Value Flags Flags
*/
CheckAccessCoin(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckAccessCoin(ABSENT, SPENT , SPENT , 0 , 0 );
CheckAccessCoin(ABSENT, SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(ABSENT, SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(ABSENT, SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(ABSENT, VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(ABSENT, VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(SPENT , ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckAccessCoin(SPENT , SPENT , SPENT , 0 , 0 );
CheckAccessCoin(SPENT , SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(SPENT , SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(SPENT , SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(SPENT , VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(SPENT , VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(SPENT , VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(VALUE1, ABSENT, VALUE1, NO_ENTRY , 0 );
CheckAccessCoin(VALUE1, SPENT , SPENT , 0 , 0 );
CheckAccessCoin(VALUE1, SPENT , SPENT , FRESH , FRESH );
CheckAccessCoin(VALUE1, SPENT , SPENT , DIRTY , DIRTY );
CheckAccessCoin(VALUE1, SPENT , SPENT , DIRTY|FRESH, DIRTY|FRESH);
CheckAccessCoin(VALUE1, VALUE2, VALUE2, 0 , 0 );
CheckAccessCoin(VALUE1, VALUE2, VALUE2, FRESH , FRESH );
CheckAccessCoin(VALUE1, VALUE2, VALUE2, DIRTY , DIRTY );
CheckAccessCoin(VALUE1, VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH);
}
static void CheckSpendCoins(CAmount base_value, CAmount cache_value, CAmount expected_value, char cache_flags, char expected_flags)
{
SingleEntryCacheTest test(base_value, cache_value, cache_flags);
test.cache.SpendCoin(OUTPOINT);
test.cache.SelfTest();
CAmount result_value;
char result_flags;
GetCoinsMapEntry(test.cache.map(), result_value, result_flags);
BOOST_CHECK_EQUAL(result_value, expected_value);
BOOST_CHECK_EQUAL(result_flags, expected_flags);
};
BOOST_AUTO_TEST_CASE(ccoins_spend)
{
/* Check SpendCoin behavior, requesting a coin from a cache view layered on
* top of a base view, spending, and then checking
* the resulting entry in the cache after the modification.
*
* Base Cache Result Cache Result
* Value Value Value Flags Flags
*/
CheckSpendCoins(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckSpendCoins(ABSENT, SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(ABSENT, SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(ABSENT, SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(ABSENT, SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(ABSENT, VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(ABSENT, VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(ABSENT, VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(ABSENT, VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(SPENT , ABSENT, ABSENT, NO_ENTRY , NO_ENTRY );
CheckSpendCoins(SPENT , SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(SPENT , SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(SPENT , VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(SPENT , VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(SPENT , VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(SPENT , VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, ABSENT, SPENT , NO_ENTRY , DIRTY );
CheckSpendCoins(VALUE1, SPENT , SPENT , 0 , DIRTY );
CheckSpendCoins(VALUE1, SPENT , ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(VALUE1, SPENT , SPENT , DIRTY , DIRTY );
CheckSpendCoins(VALUE1, SPENT , ABSENT, DIRTY|FRESH, NO_ENTRY );
CheckSpendCoins(VALUE1, VALUE2, SPENT , 0 , DIRTY );
CheckSpendCoins(VALUE1, VALUE2, ABSENT, FRESH , NO_ENTRY );
CheckSpendCoins(VALUE1, VALUE2, SPENT , DIRTY , DIRTY );
CheckSpendCoins(VALUE1, VALUE2, ABSENT, DIRTY|FRESH, NO_ENTRY );
}
static void CheckAddCoinBase(CAmount base_value, CAmount cache_value, CAmount modify_value, CAmount expected_value, char cache_flags, char expected_flags, bool coinbase)
{
SingleEntryCacheTest test(base_value, cache_value, cache_flags);
CAmount result_value;
char result_flags;
try {
CTxOut output;
output.nValue = modify_value;
test.cache.AddCoin(OUTPOINT, Coin(std::move(output), 1, coinbase), coinbase);
test.cache.SelfTest();
GetCoinsMapEntry(test.cache.map(), result_value, result_flags);
} catch (std::logic_error&) {
result_value = FAIL;
result_flags = NO_ENTRY;
}
BOOST_CHECK_EQUAL(result_value, expected_value);
BOOST_CHECK_EQUAL(result_flags, expected_flags);
}
// Simple wrapper for CheckAddCoinBase function above that loops through
// different possible base_values, making sure each one gives the same results.
// This wrapper lets the coins_add test below be shorter and less repetitive,
// while still verifying that the CoinsViewCache::AddCoin implementation
// ignores base values.
template <typename... Args>
static void CheckAddCoin(Args&&... args)
{
for (const CAmount base_value : {ABSENT, SPENT, VALUE1})
CheckAddCoinBase(base_value, std::forward<Args>(args)...);
}
BOOST_AUTO_TEST_CASE(ccoins_add)
{
/* Check AddCoin behavior, requesting a new coin from a cache view,
* writing a modification to the coin, and then checking the resulting
* entry in the cache after the modification. Verify behavior with the
* AddCoin possible_overwrite argument set to false, and to true.
*
* Cache Write Result Cache Result possible_overwrite
* Value Value Value Flags Flags
*/
CheckAddCoin(ABSENT, VALUE3, VALUE3, NO_ENTRY , DIRTY|FRESH, false);
CheckAddCoin(ABSENT, VALUE3, VALUE3, NO_ENTRY , DIRTY , true );
CheckAddCoin(SPENT , VALUE3, VALUE3, 0 , DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, 0 , DIRTY , true );
CheckAddCoin(SPENT , VALUE3, VALUE3, FRESH , DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, FRESH , DIRTY|FRESH, true );
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY , DIRTY , false);
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY , DIRTY , true );
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, false);
CheckAddCoin(SPENT , VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, true );
CheckAddCoin(VALUE2, VALUE3, FAIL , 0 , NO_ENTRY , false);
CheckAddCoin(VALUE2, VALUE3, VALUE3, 0 , DIRTY , true );
CheckAddCoin(VALUE2, VALUE3, FAIL , FRESH , NO_ENTRY , false);
CheckAddCoin(VALUE2, VALUE3, VALUE3, FRESH , DIRTY|FRESH, true );
CheckAddCoin(VALUE2, VALUE3, FAIL , DIRTY , NO_ENTRY , false);
CheckAddCoin(VALUE2, VALUE3, VALUE3, DIRTY , DIRTY , true );
CheckAddCoin(VALUE2, VALUE3, FAIL , DIRTY|FRESH, NO_ENTRY , false);
CheckAddCoin(VALUE2, VALUE3, VALUE3, DIRTY|FRESH, DIRTY|FRESH, true );
}
void CheckWriteCoins(CAmount parent_value, CAmount child_value, CAmount expected_value, char parent_flags, char child_flags, char expected_flags)
{
SingleEntryCacheTest test(ABSENT, parent_value, parent_flags);
CAmount result_value;
char result_flags;
try {
WriteCoinsViewEntry(test.cache, child_value, child_flags);
test.cache.SelfTest();
GetCoinsMapEntry(test.cache.map(), result_value, result_flags);
} catch (std::logic_error&) {
result_value = FAIL;
result_flags = NO_ENTRY;
}
BOOST_CHECK_EQUAL(result_value, expected_value);
BOOST_CHECK_EQUAL(result_flags, expected_flags);
}
BOOST_AUTO_TEST_CASE(ccoins_write)
{
/* Check BatchWrite behavior, flushing one entry from a child cache to a
* parent cache, and checking the resulting entry in the parent cache
* after the write.
*
* Parent Child Result Parent Child Result
* Value Value Value Flags Flags Flags
*/
CheckWriteCoins(ABSENT, ABSENT, ABSENT, NO_ENTRY , NO_ENTRY , NO_ENTRY );
CheckWriteCoins(ABSENT, SPENT , SPENT , NO_ENTRY , DIRTY , DIRTY );
CheckWriteCoins(ABSENT, SPENT , ABSENT, NO_ENTRY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(ABSENT, VALUE2, VALUE2, NO_ENTRY , DIRTY , DIRTY );
CheckWriteCoins(ABSENT, VALUE2, VALUE2, NO_ENTRY , DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(SPENT , ABSENT, SPENT , 0 , NO_ENTRY , 0 );
CheckWriteCoins(SPENT , ABSENT, SPENT , FRESH , NO_ENTRY , FRESH );
CheckWriteCoins(SPENT , ABSENT, SPENT , DIRTY , NO_ENTRY , DIRTY );
CheckWriteCoins(SPENT , ABSENT, SPENT , DIRTY|FRESH, NO_ENTRY , DIRTY|FRESH);
CheckWriteCoins(SPENT , SPENT , SPENT , 0 , DIRTY , DIRTY );
CheckWriteCoins(SPENT , SPENT , SPENT , 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , SPENT , ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , ABSENT, FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY , DIRTY );
CheckWriteCoins(SPENT , SPENT , SPENT , DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(SPENT , SPENT , ABSENT, DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, 0 , DIRTY , DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, 0 , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, FRESH , DIRTY , DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, FRESH , DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY , DIRTY|FRESH, DIRTY );
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY , DIRTY|FRESH);
CheckWriteCoins(SPENT , VALUE2, VALUE2, DIRTY|FRESH, DIRTY|FRESH, DIRTY|FRESH);
CheckWriteCoins(VALUE1, ABSENT, VALUE1, 0 , NO_ENTRY , 0 );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, FRESH , NO_ENTRY , FRESH );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, DIRTY , NO_ENTRY , DIRTY );
CheckWriteCoins(VALUE1, ABSENT, VALUE1, DIRTY|FRESH, NO_ENTRY , DIRTY|FRESH);
CheckWriteCoins(VALUE1, SPENT , SPENT , 0 , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, SPENT , FAIL , 0 , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , ABSENT, FRESH , DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , FAIL , FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , SPENT , DIRTY , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, SPENT , FAIL , DIRTY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , ABSENT, DIRTY|FRESH, DIRTY , NO_ENTRY );
CheckWriteCoins(VALUE1, SPENT , FAIL , DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, 0 , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, VALUE2, FAIL , 0 , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, FRESH , DIRTY , DIRTY|FRESH);
CheckWriteCoins(VALUE1, VALUE2, FAIL , FRESH , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, DIRTY , DIRTY , DIRTY );
CheckWriteCoins(VALUE1, VALUE2, FAIL , DIRTY , DIRTY|FRESH, NO_ENTRY );
CheckWriteCoins(VALUE1, VALUE2, VALUE2, DIRTY|FRESH, DIRTY , DIRTY|FRESH);
CheckWriteCoins(VALUE1, VALUE2, FAIL , DIRTY|FRESH, DIRTY|FRESH, NO_ENTRY );
// The checks above omit cases where the child flags are not DIRTY, since
// they would be too repetitive (the parent cache is never updated in these
// cases). The loop below covers these cases and makes sure the parent cache
// is always left unchanged.
for (const CAmount parent_value : {ABSENT, SPENT, VALUE1})
for (const CAmount child_value : {ABSENT, SPENT, VALUE2})
for (const char parent_flags : parent_value == ABSENT ? ABSENT_FLAGS : FLAGS)
for (const char child_flags : child_value == ABSENT ? ABSENT_FLAGS : CLEAN_FLAGS)
CheckWriteCoins(parent_value, child_value, parent_value, parent_flags, child_flags, parent_flags);
}
BOOST_AUTO_TEST_SUITE_END()