tiamak/p2pool-salvium
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De-duplicate tx hashes and pub keys to save memory (off by default) (#382)

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P2Pool-main: 8.2 MB saved
P2Pool-mini: 66 MB saved
P2Pool-nano: 25.2 MB saved

The feature is available only when building from source and is intended for use on low-memory systems (for example, a VPS server with < 1 GB RAM).

It only makes sense to use with `--no-cache --no-randomx` in the command line because cache and RandomX hasher take much more memory.
This commit is contained in:
SChernykh
2025-10-18 12:21:16 +02:00
committed by GitHub
parent 52bcbda381
commit e2f0ec7c69
25 changed files with 640 additions and 103 deletions
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src/pool_block.cpp
+35 -10
View File
@@ -90,7 +90,8 @@ PoolBlock& PoolBlock::operator=(const PoolBlock& b)
m_prevId = b.m_prevId;
m_nonce = b.m_nonce;
m_txinGenHeight = b.m_txinGenHeight;
m_outputs = b.m_outputs;
m_ephPublicKeys = b.m_ephPublicKeys;
m_outputAmounts = b.m_outputAmounts;
m_txkeyPub = b.m_txkeyPub;
m_extraNonceSize = b.m_extraNonceSize;
m_extraNonce = b.m_extraNonce;
@@ -139,7 +140,7 @@ PoolBlock& PoolBlock::operator=(const PoolBlock& b)
std::vector<uint8_t> PoolBlock::serialize_mainchain_data(size_t* header_size, size_t* miner_tx_size, int* outputs_offset, int* outputs_blob_size, const uint32_t* nonce, const uint32_t* extra_nonce) const
{
std::vector<uint8_t> data;
data.reserve(128 + m_outputs.size() * 39 + m_transactions.size() * HASH_SIZE);
data.reserve(std::min<size_t>(128 + m_outputAmounts.size() * 39 + m_transactions.size() * HASH_SIZE, 131072));
// Header
data.push_back(m_majorVersion);
@@ -169,12 +170,15 @@ std::vector<uint8_t> PoolBlock::serialize_mainchain_data(size_t* header_size, si
*outputs_offset = outputs_offset0;
}
writeVarint(m_outputs.size(), data);
writeVarint(m_outputAmounts.size(), data);
for (size_t i = 0, n = m_outputAmounts.size(); i < n; ++i) {
const TxOutput& output = m_outputAmounts[i];
for (const TxOutput& output : m_outputs) {
writeVarint(output.m_reward, data);
data.push_back(TXOUT_TO_TAGGED_KEY);
data.insert(data.end(), output.m_ephPublicKey.h, output.m_ephPublicKey.h + HASH_SIZE);
const hash h = m_ephPublicKeys[i];
data.insert(data.end(), h.h, h.h + HASH_SIZE);
data.push_back(static_cast<uint8_t>(output.m_viewTag));
}
@@ -225,8 +229,16 @@ std::vector<uint8_t> PoolBlock::serialize_mainchain_data(size_t* header_size, si
}
writeVarint(m_transactions.size() - 1, data);
#ifdef WITH_INDEXED_HASHES
for (size_t i = 1, n = m_transactions.size(); i < n; ++i) {
const hash h = m_transactions[i];
data.insert(data.end(), h.h, h.h + HASH_SIZE);
}
#else
const uint8_t* t = reinterpret_cast<const uint8_t*>(m_transactions.data());
data.insert(data.end(), t + HASH_SIZE, t + m_transactions.size() * HASH_SIZE);
#endif
#if POOL_BLOCK_DEBUG
if ((nonce == &m_nonce) && (extra_nonce == &m_extraNonce) && !m_mainChainDataDebug.empty() && (data != m_mainChainDataDebug)) {
@@ -369,15 +381,27 @@ bool PoolBlock::get_pow_hash(RandomX_Hasher_Base* hasher, uint64_t height, const
memcpy(hashes, tmp.h, HASH_SIZE);
count = m_transactions.size();
uint8_t* h = reinterpret_cast<uint8_t*>(m_transactions.data());
keccak(reinterpret_cast<uint8_t*>(hashes), HASH_SIZE * 3, tmp.h);
// Save the coinbase tx hash into the first element of m_transactions
memcpy(h, tmp.h, HASH_SIZE);
m_transactions[0] = static_cast<indexed_hash>(tmp);
root_hash tmp_root;
#ifdef WITH_INDEXED_HASHES
std::vector<hash> transactions;
transactions.reserve(m_transactions.size());
for (const auto& h : m_transactions) {
transactions.emplace_back(h);
}
merkle_hash(transactions, tmp_root);
#else
merkle_hash(m_transactions, tmp_root);
#endif
memcpy(blob + blob_size, tmp_root.h, HASH_SIZE);
blob_size += HASH_SIZE;
}
@@ -392,13 +416,14 @@ bool PoolBlock::get_pow_hash(RandomX_Hasher_Base* hasher, uint64_t height, const
uint64_t PoolBlock::get_payout(const Wallet& w) const
{
for (size_t i = 0, n = m_outputs.size(); i < n; ++i) {
const TxOutput& out = m_outputs[i];
for (size_t i = 0, n = m_outputAmounts.size(); i < n; ++i) {
const TxOutput& out = m_outputAmounts[i];
hash eph_public_key;
uint8_t view_tag;
const uint8_t expected_view_tag = out.m_viewTag;
if (w.get_eph_public_key(m_txkeySec, i, eph_public_key, view_tag, &expected_view_tag) && (eph_public_key == out.m_ephPublicKey)) {
if (w.get_eph_public_key(m_txkeySec, i, eph_public_key, view_tag, &expected_view_tag) && (m_ephPublicKeys[i] == eph_public_key)) {
return out.m_reward;
}
}