Merge #16728: move-only: move coins statistics utils out of RPC
pull/764/head8a3b2eb175move-only: move coins statistics utils out of RPC (James O'Beirne) Pull request description: This is part of the [assumeutxo project](https://github.com/bitcoin/bitcoin/projects/11): Parent PR: #15606 Issue: #15605 Specification: https://github.com/jamesob/assumeutxo-docs/tree/master/proposal --- In the short-term, this move-only commit will help with fuzzing (https://github.com/bitcoin/bitcoin/pull/15606#issuecomment-524482297). Later, these procedures will be used to compute statistics (particularly a content hash) for UTXO sets coming in from snapshots. Most easily reviewed with `git ... --color-moved=dimmed_zebra`. A nice follow-up would be adding unittests, which I'll do if nobody else gets around to it. ACKs for top commit: MarcoFalke: ACK8a3b2eb175, checked --color-moved=dimmed-zebra Tree-SHA512: a187d2f7590ad2450b8e8fa3d038c80a04fc3d903618c24222d7e3172250ce51badea35860c86101f2ba266eb4354e6efb8d7d508b353f29276e4665a1efdf74
MarcoFalke
5 years ago
commit
a7be1cc92b
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// Copyright (c) 2010 Satoshi Nakamoto
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// Copyright (c) 2009-2019 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <node/coinstats.h>
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#include <amount.h>
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#include <coins.h>
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#include <chain.h>
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#include <hash.h>
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#include <serialize.h>
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#include <validation.h>
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#include <uint256.h>
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#include <util/system.h>
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#include <map>
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#include <boost/thread.hpp>
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static void ApplyStats(CCoinsStats &stats, CHashWriter& ss, const uint256& hash, const std::map<uint32_t, Coin>& outputs)
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{
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assert(!outputs.empty());
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ss << hash;
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ss << VARINT(outputs.begin()->second.nHeight * 2 + outputs.begin()->second.fCoinBase ? 1u : 0u);
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stats.nTransactions++;
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for (const auto& output : outputs) {
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ss << VARINT(output.first + 1);
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ss << output.second.out.scriptPubKey;
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ss << VARINT(output.second.out.nValue, VarIntMode::NONNEGATIVE_SIGNED);
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stats.nTransactionOutputs++;
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stats.nTotalAmount += output.second.out.nValue;
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stats.nBogoSize += 32 /* txid */ + 4 /* vout index */ + 4 /* height + coinbase */ + 8 /* amount */ +
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2 /* scriptPubKey len */ + output.second.out.scriptPubKey.size() /* scriptPubKey */;
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}
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ss << VARINT(0u);
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}
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//! Calculate statistics about the unspent transaction output set
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bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats)
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{
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std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
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assert(pcursor);
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CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
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stats.hashBlock = pcursor->GetBestBlock();
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{
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LOCK(cs_main);
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stats.nHeight = LookupBlockIndex(stats.hashBlock)->nHeight;
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}
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ss << stats.hashBlock;
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uint256 prevkey;
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std::map<uint32_t, Coin> outputs;
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while (pcursor->Valid()) {
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boost::this_thread::interruption_point();
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COutPoint key;
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Coin coin;
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if (pcursor->GetKey(key) && pcursor->GetValue(coin)) {
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if (!outputs.empty() && key.hash != prevkey) {
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ApplyStats(stats, ss, prevkey, outputs);
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outputs.clear();
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}
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prevkey = key.hash;
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outputs[key.n] = std::move(coin);
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} else {
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return error("%s: unable to read value", __func__);
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}
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pcursor->Next();
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}
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if (!outputs.empty()) {
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ApplyStats(stats, ss, prevkey, outputs);
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}
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stats.hashSerialized = ss.GetHash();
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stats.nDiskSize = view->EstimateSize();
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return true;
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}
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@ -0,0 +1,33 @@
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// Copyright (c) 2010 Satoshi Nakamoto
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// Copyright (c) 2009-2019 The Bitcoin Core developers
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// Distributed under the MIT 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 BITCOIN_NODE_COINSTATS_H
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#define BITCOIN_NODE_COINSTATS_H
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#include <amount.h>
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#include <uint256.h>
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#include <cstdint>
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class CCoinsView;
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struct CCoinsStats
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{
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int nHeight;
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uint256 hashBlock;
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uint64_t nTransactions;
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uint64_t nTransactionOutputs;
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uint64_t nBogoSize;
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uint256 hashSerialized;
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uint64_t nDiskSize;
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CAmount nTotalAmount;
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CCoinsStats() : nHeight(0), nTransactions(0), nTransactionOutputs(0), nBogoSize(0), nDiskSize(0), nTotalAmount(0) {}
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};
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//! Calculate statistics about the unspent transaction output set
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bool GetUTXOStats(CCoinsView* view, CCoinsStats& stats);
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#endif // BITCOIN_NODE_COINSTATS_H
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