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refactor: Simplify ApplyStats and ApplyHash

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This commit is contained in:
Fabian Jahr 2021-02-21 23:09:50 +01:00
parent 9c8a265fd2
commit a8a46c4b3c
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GPG Key ID: F13D1E9D890798CD
1 changed files with 39 additions and 36 deletions
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75
src/node/coinstats.cpp
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@ -26,36 +26,6 @@ static uint64_t GetBogoSize(const CScript& scriptPubKey)
scriptPubKey.size() /* scriptPubKey */;
}
static void ApplyHash(CCoinsStats& stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs, std::map<uint32_t, Coin>::const_iterator it)
{
if (it == outputs.begin()) {
ss << hash;
ss << VARINT(it->second.nHeight * 2 + it->second.fCoinBase ? 1u : 0u);
}
ss << VARINT(it->first + 1);
ss << it->second.out.scriptPubKey;
ss << VARINT_MODE(it->second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
if (it == std::prev(outputs.end())) {
ss << VARINT(0u);
}
}
static void ApplyHash(CCoinsStats& stats, std::nullptr_t, const uint256& hash, const std::map<uint32_t, Coin>& outputs, std::map<uint32_t, Coin>::const_iterator it) {}
static void ApplyHash(CCoinsStats& stats, MuHash3072& muhash, const uint256& hash, const std::map<uint32_t, Coin>& outputs, std::map<uint32_t, Coin>::const_iterator it)
{
COutPoint outpoint = COutPoint(hash, it->first);
Coin coin = it->second;
CDataStream ss(SER_DISK, PROTOCOL_VERSION);
ss << outpoint;
ss << static_cast<uint32_t>(coin.nHeight * 2 + coin.fCoinBase);
ss << coin.out;
muhash.Insert(MakeUCharSpan(ss));
}
//! Warning: be very careful when changing this! assumeutxo and UTXO snapshot
//! validation commitments are reliant on the hash constructed by this
//! function.
@ -68,14 +38,45 @@ static void ApplyHash(CCoinsStats& stats, MuHash3072& muhash, const uint256& has
//! It is also possible, though very unlikely, that a change in this
//! construction could cause a previously invalid (and potentially malicious)
//! UTXO snapshot to be considered valid.
template <typename T>
static void ApplyStats(CCoinsStats& stats, T& hash_obj, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
static void ApplyHash(CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
{
for (auto it = outputs.begin(); it != outputs.end(); ++it) {
if (it == outputs.begin()) {
ss << hash;
ss << VARINT(it->second.nHeight * 2 + it->second.fCoinBase ? 1u : 0u);
}
ss << VARINT(it->first + 1);
ss << it->second.out.scriptPubKey;
ss << VARINT_MODE(it->second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
if (it == std::prev(outputs.end())) {
ss << VARINT(0u);
}
}
}
static void ApplyHash(std::nullptr_t, const uint256& hash, const std::map<uint32_t, Coin>& outputs) {}
static void ApplyHash(MuHash3072& muhash, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
{
for (auto it = outputs.begin(); it != outputs.end(); ++it) {
COutPoint outpoint = COutPoint(hash, it->first);
Coin coin = it->second;
CDataStream ss(SER_DISK, PROTOCOL_VERSION);
ss << outpoint;
ss << static_cast<uint32_t>(coin.nHeight * 2 + coin.fCoinBase);
ss << coin.out;
muhash.Insert(MakeUCharSpan(ss));
}
}
static void ApplyStats(CCoinsStats& stats, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
{
assert(!outputs.empty());
stats.nTransactions++;
for (auto it = outputs.begin(); it != outputs.end(); ++it) {
ApplyHash(stats, hash_obj, hash, outputs, it);
stats.nTransactionOutputs++;
stats.nTotalAmount += it->second.out.nValue;
stats.nBogoSize += GetBogoSize(it->second.out.scriptPubKey);
@ -107,7 +108,8 @@ static bool GetUTXOStats(CCoinsView* view, BlockManager& blockman, CCoinsStats&
Coin coin;
if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
if (!outputs.empty() && key.hash != prevkey) {
ApplyStats(stats, hash_obj, prevkey, outputs);
ApplyStats(stats, prevkey, outputs);
ApplyHash(hash_obj, prevkey, outputs);
outputs.clear();
}
prevkey = key.hash;
@ -119,7 +121,8 @@ static bool GetUTXOStats(CCoinsView* view, BlockManager& blockman, CCoinsStats&
pcursor->Next();
}
if (!outputs.empty()) {
ApplyStats(stats, hash_obj, prevkey, outputs);
ApplyStats(stats, prevkey, outputs);
ApplyHash(hash_obj, prevkey, outputs);
}
FinalizeHash(hash_obj, stats);