sami7777
b506a48192
- Add UTXO snapshot dump/load system (utxosnapshot.cpp/h) for fast initial sync - Add dumputxoset RPC command to create snapshots from current chain state - Add script verification cache (sigcache.h) to skip re-verifying scripts already validated during mempool acceptance - Bootstrap: try UTXO snapshot first (fast path), fall back to full bootstrap - Support manual utxo-snapshot.bin loading on startup - Tune sync parameters for Tor: increase timeouts, reduce buffer sizes - Header sync cache: TTL-based eviction instead of full cache clear - Reduce orphan block limits and script check batch size for lower memory usage Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
73 lines
2.1 KiB
C++
73 lines
2.1 KiB
C++
// Copyright (c) 2024 The Triangles developers
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// Distributed under the MIT/X11 software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef TRIANGLES_SCRIPT_VERIFY_CACHE_H
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#define TRIANGLES_SCRIPT_VERIFY_CACHE_H
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#include "uint256.h"
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#include "sync.h"
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#include <openssl/sha.h>
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#include <cstring>
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#include <unordered_set>
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/**
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* High-level script verification cache keyed by (txid, input_index).
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* Skips the entire VerifyScript() call for inputs already validated
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* during mempool acceptance when the same transaction appears in a block.
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*
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* Complements the lower-level CSignatureCache in script.cpp which caches
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* individual ECDSA signature checks.
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*
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* ~256KB memory footprint at 32K entries.
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*/
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class CScriptVerifyCache
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{
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private:
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static const unsigned int MAX_CACHE_SIZE = 32768;
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struct Uint256Hasher {
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size_t operator()(const uint256& v) const {
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return *reinterpret_cast<const size_t*>(v.begin());
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}
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};
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mutable CCriticalSection cs;
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std::unordered_set<uint256, Uint256Hasher> setValid;
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uint256 ComputeKey(const uint256& txid, unsigned int nIn) const
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{
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unsigned char data[36]; // 32 bytes txid + 4 bytes input index
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memcpy(data, txid.begin(), 32);
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memcpy(data + 32, &nIn, 4);
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uint256 result;
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SHA256(data, 36, (unsigned char*)&result);
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return result;
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}
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public:
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bool Get(const uint256& txid, unsigned int nIn) const
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{
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LOCK(cs);
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return setValid.count(ComputeKey(txid, nIn)) > 0;
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}
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void Set(const uint256& txid, unsigned int nIn)
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{
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LOCK(cs);
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if (setValid.size() >= MAX_CACHE_SIZE)
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{
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// Evict half the cache when full
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auto it = setValid.begin();
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unsigned int nEvict = MAX_CACHE_SIZE / 2;
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while (nEvict > 0 && it != setValid.end()) {
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it = setValid.erase(it);
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--nEvict;
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}
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}
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setValid.insert(ComputeKey(txid, nIn));
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}
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};
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#endif // TRIANGLES_SCRIPT_VERIFY_CACHE_H
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