1158 lines
46 KiB
C++
1158 lines
46 KiB
C++
// Copyright (c) 2009-2010 Satoshi Nakamoto
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// Copyright (c) 2009-2014 The Bitcoin Core developers
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// Copyright (c) 2016-2022 The Zcash developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or https://www.opensource.org/licenses/mit-license.php .
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#include "miner.h"
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#ifdef ENABLE_MINING
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#include "pow/tromp/equi_miner.h"
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#endif
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#include "amount.h"
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#include "chainparams.h"
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#include "consensus/consensus.h"
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#include "consensus/funding.h"
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#include "consensus/merkle.h"
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#include "consensus/upgrades.h"
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#include "consensus/validation.h"
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#ifdef ENABLE_MINING
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#include "crypto/equihash.h"
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#endif
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#include "hash.h"
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#include "key_io.h"
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#include "main.h"
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#include "metrics.h"
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#include "net.h"
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#include "zcash/Note.hpp"
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#include "policy/policy.h"
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#include "pow.h"
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#include "primitives/transaction.h"
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#include "random.h"
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#include "timedata.h"
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#include "transaction_builder.h"
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#include "ui_interface.h"
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#include "util/system.h"
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#include "util/moneystr.h"
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#include "validationinterface.h"
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#include <librustzcash.h>
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#include <rust/sapling.h>
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#include <boost/thread.hpp>
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#include <boost/tuple/tuple.hpp>
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#ifdef ENABLE_MINING
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#include <functional>
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#endif
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#include <mutex>
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using namespace std;
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//////////////////////////////////////////////////////////////////////////////
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//
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// BitcoinMiner
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//
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//
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// Unconfirmed transactions in the memory pool often depend on other
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// transactions in the memory pool. When we select transactions from the
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// pool, we select by highest priority or fee rate, so we might consider
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// transactions that depend on transactions that aren't yet in the block.
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// The COrphan class keeps track of these 'temporary orphans' while
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// CreateBlock is figuring out which transactions to include.
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//
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class COrphan
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{
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public:
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const CTransaction* ptx;
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set<uint256> setDependsOn;
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CFeeRate feeRate;
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CAmount feePaid;
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double dPriority;
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COrphan(const CTransaction* ptxIn) : ptx(ptxIn), feeRate(0), feePaid(0), dPriority(0)
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{
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}
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};
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std::optional<uint64_t> last_block_num_txs;
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std::optional<uint64_t> last_block_size;
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// We want to sort transactions by priority and fee rate, so:
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typedef boost::tuple<double, CFeeRate, CAmount, const CTransaction*> TxPriority;
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class TxPriorityCompare
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{
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bool byFee;
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public:
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TxPriorityCompare(bool _byFee) : byFee(_byFee) { }
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bool operator()(const TxPriority& a, const TxPriority& b)
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{
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if (byFee)
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{
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if (a.get<1>() == b.get<1>())
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return a.get<0>() < b.get<0>();
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return a.get<1>() < b.get<1>();
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}
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else
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{
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if (a.get<0>() == b.get<0>())
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return a.get<1>() < b.get<1>();
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return a.get<0>() < b.get<0>();
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}
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}
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};
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void UpdateTime(CBlockHeader* pblock, const Consensus::Params& consensusParams, const CBlockIndex* pindexPrev)
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{
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auto medianTimePast = pindexPrev->GetMedianTimePast();
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auto nTime = std::max(medianTimePast + 1, GetTime());
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// See the comment in ContextualCheckBlockHeader() for background.
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if (consensusParams.FutureTimestampSoftForkActive(pindexPrev->nHeight + 1)) {
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nTime = std::min(nTime, medianTimePast + MAX_FUTURE_BLOCK_TIME_MTP);
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}
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pblock->nTime = nTime;
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// Updating time can change work required on testnet:
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if (consensusParams.nPowAllowMinDifficultyBlocksAfterHeight != std::nullopt) {
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pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, consensusParams);
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}
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}
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bool IsShieldedMinerAddress(const MinerAddress& minerAddr) {
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return !std::holds_alternative<boost::shared_ptr<CReserveScript>>(minerAddr);
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}
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class AddFundingStreamValueToTx
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{
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private:
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CMutableTransaction &mtx;
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rust::Box<sapling::Prover>& ctx;
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const CAmount fundingStreamValue;
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const libzcash::Zip212Enabled zip212Enabled;
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public:
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AddFundingStreamValueToTx(
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CMutableTransaction &mtx,
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rust::Box<sapling::Prover>& ctx,
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const CAmount fundingStreamValue,
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const libzcash::Zip212Enabled zip212Enabled): mtx(mtx), ctx(ctx), fundingStreamValue(fundingStreamValue), zip212Enabled(zip212Enabled) {}
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bool operator()(const libzcash::SaplingPaymentAddress& pa) const {
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uint256 ovk;
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auto note = libzcash::SaplingNote(pa, fundingStreamValue, zip212Enabled);
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auto output = OutputDescriptionInfo(ovk, note, NO_MEMO);
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auto odesc = output.Build(ctx);
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if (odesc) {
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mtx.vShieldedOutput.push_back(odesc.value());
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mtx.valueBalanceSapling -= fundingStreamValue;
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return true;
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} else {
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return false;
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}
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}
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bool operator()(const CScript& scriptPubKey) const {
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mtx.vout.push_back(CTxOut(fundingStreamValue, scriptPubKey));
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return true;
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}
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};
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class AddOutputsToCoinbaseTxAndSign
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{
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private:
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CMutableTransaction &mtx;
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const CChainParams &chainparams;
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const int nHeight;
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const CAmount nFees;
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public:
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AddOutputsToCoinbaseTxAndSign(
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CMutableTransaction &mtx,
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const CChainParams &chainparams,
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const int nHeight,
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const CAmount nFees) : mtx(mtx), chainparams(chainparams), nHeight(nHeight), nFees(nFees) {}
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const libzcash::Zip212Enabled GetZip212Flag() const {
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if (chainparams.GetConsensus().NetworkUpgradeActive(nHeight, Consensus::UPGRADE_CANOPY)) {
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return libzcash::Zip212Enabled::AfterZip212;
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} else {
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return libzcash::Zip212Enabled::BeforeZip212;
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}
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}
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CAmount SetFoundersRewardAndGetMinerValue(rust::Box<sapling::Prover>& ctx) const {
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auto block_subsidy = GetBlockSubsidy(nHeight, chainparams.GetConsensus());
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auto miner_reward = block_subsidy; // founders' reward or funding stream amounts will be subtracted below
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if (nHeight > 0) {
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if (chainparams.GetConsensus().NetworkUpgradeActive(nHeight, Consensus::UPGRADE_CANOPY)) {
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auto fundingStreamElements = Consensus::GetActiveFundingStreamElements(
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nHeight,
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block_subsidy,
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chainparams.GetConsensus());
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for (Consensus::FundingStreamElement fselem : fundingStreamElements) {
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miner_reward -= fselem.second;
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bool added = std::visit(AddFundingStreamValueToTx(mtx, ctx, fselem.second, GetZip212Flag()), fselem.first);
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if (!added) {
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throw new std::runtime_error("Failed to add funding stream output.");
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}
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}
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} else if (nHeight <= chainparams.GetConsensus().GetLastFoundersRewardBlockHeight(nHeight)) {
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// Founders reward is 20% of the block subsidy
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auto vFoundersReward = miner_reward / 5;
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// Take some reward away from us
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miner_reward -= vFoundersReward;
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// And give it to the founders
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mtx.vout.push_back(CTxOut(vFoundersReward, chainparams.GetFoundersRewardScriptAtHeight(nHeight)));
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} else {
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// Founders reward ends without replacement if Canopy is not activated by the
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// last Founders' Reward block height + 1.
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}
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}
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return miner_reward + nFees;
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}
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void ComputeBindingSig(rust::Box<sapling::Prover> saplingCtx, std::optional<orchard::UnauthorizedBundle> orchardBundle) const {
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// Empty output script.
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uint256 dataToBeSigned;
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try {
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if (orchardBundle.has_value()) {
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// Orchard is only usable with v5+ transactions.
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dataToBeSigned = ProduceZip244SignatureHash(mtx, {}, orchardBundle.value());
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} else {
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CScript scriptCode;
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PrecomputedTransactionData txdata(mtx, {});
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dataToBeSigned = SignatureHash(
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scriptCode, mtx, NOT_AN_INPUT, SIGHASH_ALL, 0,
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CurrentEpochBranchId(nHeight, chainparams.GetConsensus()),
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txdata);
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}
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} catch (std::logic_error ex) {
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throw ex;
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}
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if (orchardBundle.has_value()) {
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auto authorizedBundle = orchardBundle.value().ProveAndSign({}, dataToBeSigned);
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if (authorizedBundle.has_value()) {
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mtx.orchardBundle = authorizedBundle.value();
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} else {
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throw new std::runtime_error("Failed to create Orchard proof or signatures");
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}
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}
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bool success = saplingCtx->binding_sig(
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mtx.valueBalanceSapling,
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dataToBeSigned.GetRawBytes(),
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mtx.bindingSig);
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if (!success) {
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throw new std::runtime_error("An error occurred computing the binding signature.");
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}
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}
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// Create Orchard output
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void operator()(const libzcash::OrchardRawAddress &to) const {
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auto ctx = sapling::init_prover();
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// `enableSpends` must be set to `false` for coinbase transactions. This
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// means the Orchard anchor is unconstrained, so we set it to the empty
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// tree root via a null (all zeroes) uint256.
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uint256 orchardAnchor;
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auto builder = orchard::Builder(false, true, orchardAnchor);
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// Shielded coinbase outputs must be recoverable with an all-zeroes ovk.
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uint256 ovk;
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auto miner_reward = SetFoundersRewardAndGetMinerValue(ctx);
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builder.AddOutput(ovk, to, miner_reward, std::nullopt);
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// orchard::Builder pads to two Actions, but does so using a "no OVK" policy for
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// dummy outputs, which violates coinbase rules requiring all shielded outputs to
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// be recoverable. We manually add a dummy output to sidestep this issue.
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// TODO: If/when we have funding streams going to Orchard recipients, this dummy
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// output can be removed.
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RawHDSeed rawSeed(32, 0);
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GetRandBytes(rawSeed.data(), 32);
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auto dummyTo = libzcash::OrchardSpendingKey::ForAccount(HDSeed(rawSeed), Params().BIP44CoinType(), 0)
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.ToFullViewingKey()
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.ToIncomingViewingKey()
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.Address(0);
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builder.AddOutput(ovk, dummyTo, 0, std::nullopt);
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auto bundle = builder.Build();
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if (!bundle.has_value()) {
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throw new std::runtime_error("Failed to create shielded output for miner");
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}
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ComputeBindingSig(std::move(ctx), std::move(bundle));
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}
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// Create shielded output
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void operator()(const libzcash::SaplingPaymentAddress &pa) const {
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auto ctx = sapling::init_prover();
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auto miner_reward = SetFoundersRewardAndGetMinerValue(ctx);
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mtx.valueBalanceSapling -= miner_reward;
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uint256 ovk;
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auto note = libzcash::SaplingNote(pa, miner_reward, GetZip212Flag());
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auto output = OutputDescriptionInfo(ovk, note, NO_MEMO);
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auto odesc = output.Build(ctx);
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if (!odesc) {
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throw new std::runtime_error("Failed to create shielded output for miner");
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}
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mtx.vShieldedOutput.push_back(odesc.value());
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ComputeBindingSig(std::move(ctx), std::nullopt);
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}
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// Create transparent output
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void operator()(const boost::shared_ptr<CReserveScript> &coinbaseScript) const {
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// Add the FR output and fetch the miner's output value.
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auto ctx = sapling::init_prover();
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// Miner output will be vout[0]; Founders' Reward & funding stream outputs
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// will follow.
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mtx.vout.resize(1);
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auto value = SetFoundersRewardAndGetMinerValue(ctx);
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// Now fill in the miner's output.
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mtx.vout[0] = CTxOut(value, coinbaseScript->reserveScript);
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if (mtx.vShieldedOutput.size() > 0) {
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ComputeBindingSig(std::move(ctx), std::nullopt);
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}
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}
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};
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CMutableTransaction CreateCoinbaseTransaction(const CChainParams& chainparams, CAmount nFees, const MinerAddress& minerAddress, int nHeight)
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{
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CMutableTransaction mtx = CreateNewContextualCMutableTransaction(
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chainparams.GetConsensus(), nHeight,
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!std::holds_alternative<libzcash::OrchardRawAddress>(minerAddress) && nPreferredTxVersion < ZIP225_MIN_TX_VERSION);
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mtx.vin.resize(1);
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mtx.vin[0].prevout.SetNull();
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if (chainparams.GetConsensus().NetworkUpgradeActive(nHeight, Consensus::UPGRADE_NU5)) {
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// ZIP 203: From NU5 onwards, nExpiryHeight is set to the block height in
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// coinbase transactions.
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mtx.nExpiryHeight = nHeight;
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} else {
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// Set to 0 so expiry height does not apply to coinbase txs
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mtx.nExpiryHeight = 0;
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}
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// Add outputs and sign
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std::visit(
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AddOutputsToCoinbaseTxAndSign(mtx, chainparams, nHeight, nFees),
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minerAddress);
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mtx.vin[0].scriptSig = CScript() << nHeight << OP_0;
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return mtx;
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}
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CBlockTemplate* CreateNewBlock(const CChainParams& chainparams, const MinerAddress& minerAddress, const std::optional<CMutableTransaction>& next_cb_mtx)
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{
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// Create new block
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std::unique_ptr<CBlockTemplate> pblocktemplate(new CBlockTemplate());
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if(!pblocktemplate.get())
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return NULL;
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CBlock *pblock = &pblocktemplate->block; // pointer for convenience
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// -regtest only: allow overriding block.nVersion with
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// -blockversion=N to test forking scenarios
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if (chainparams.MineBlocksOnDemand())
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pblock->nVersion = GetArg("-blockversion", pblock->nVersion);
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// Add dummy coinbase tx as first transaction
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pblock->vtx.push_back(CTransaction());
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pblocktemplate->vTxFees.push_back(-1); // updated at end
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pblocktemplate->vTxSigOps.push_back(-1); // updated at end
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// Largest block you're willing to create:
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unsigned int nBlockMaxSize = GetArg("-blockmaxsize", DEFAULT_BLOCK_MAX_SIZE);
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// Limit to between 1K and MAX_BLOCK_SIZE-1K for sanity:
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nBlockMaxSize = std::max((unsigned int)1000, std::min((unsigned int)(MAX_BLOCK_SIZE-1000), nBlockMaxSize));
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// How much of the block should be dedicated to high-priority transactions,
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// included regardless of the fees they pay
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unsigned int nBlockPrioritySize = GetArg("-blockprioritysize", DEFAULT_BLOCK_PRIORITY_SIZE);
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nBlockPrioritySize = std::min(nBlockMaxSize, nBlockPrioritySize);
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// Minimum block size you want to create; block will be filled with free transactions
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// until there are no more or the block reaches this size:
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unsigned int nBlockMinSize = GetArg("-blockminsize", DEFAULT_BLOCK_MIN_SIZE);
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nBlockMinSize = std::min(nBlockMaxSize, nBlockMinSize);
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// Collect memory pool transactions into the block
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CAmount nFees = 0;
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{
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LOCK2(cs_main, mempool.cs);
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CBlockIndex* pindexPrev = chainActive.Tip();
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const int nHeight = pindexPrev->nHeight + 1;
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uint32_t consensusBranchId = CurrentEpochBranchId(nHeight, chainparams.GetConsensus());
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pblock->nTime = GetTime();
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const int64_t nMedianTimePast = pindexPrev->GetMedianTimePast();
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CCoinsViewCache view(pcoinsTip);
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SaplingMerkleTree sapling_tree;
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assert(view.GetSaplingAnchorAt(view.GetBestAnchor(SAPLING), sapling_tree));
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// Priority order to process transactions
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list<COrphan> vOrphan; // list memory doesn't move
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map<uint256, vector<COrphan*> > mapDependers;
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bool fPrintPriority = GetBoolArg("-printpriority", DEFAULT_PRINTPRIORITY);
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// This vector will be sorted into a priority queue:
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vector<TxPriority> vecPriority;
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vecPriority.reserve(mempool.mapTx.size());
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// If we're given a coinbase tx, it's been precomputed, its fees are zero,
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// so we can't include any mempool transactions; this will be an empty block.
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if (!next_cb_mtx) {
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for (CTxMemPool::indexed_transaction_set::iterator mi = mempool.mapTx.begin();
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mi != mempool.mapTx.end(); ++mi)
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{
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const CTransaction& tx = mi->GetTx();
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int64_t nLockTimeCutoff = (STANDARD_LOCKTIME_VERIFY_FLAGS & LOCKTIME_MEDIAN_TIME_PAST)
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? nMedianTimePast
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: pblock->GetBlockTime();
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if (tx.IsCoinBase() || !IsFinalTx(tx, nHeight, nLockTimeCutoff) || IsExpiredTx(tx, nHeight))
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continue;
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COrphan* porphan = NULL;
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double dPriority = 0;
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CAmount nTotalIn = 0;
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bool fMissingInputs = false;
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for (const CTxIn& txin : tx.vin)
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{
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// Read prev transaction
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if (!view.HaveCoins(txin.prevout.hash))
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{
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LogPrintf("INFO: missing coins for %s", txin.prevout.hash.GetHex());
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// This should never happen; all transactions in the memory
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// pool should connect to either transactions in the chain
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// or other transactions in the memory pool.
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if (!mempool.mapTx.count(txin.prevout.hash))
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{
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LogPrintf("ERROR: mempool transaction missing input\n");
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if (fDebug) assert("mempool transaction missing input" == 0);
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fMissingInputs = true;
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if (porphan)
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vOrphan.pop_back();
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break;
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}
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// Has to wait for dependencies
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if (!porphan)
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{
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// Use list for automatic deletion
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vOrphan.push_back(COrphan(&tx));
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porphan = &vOrphan.back();
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}
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mapDependers[txin.prevout.hash].push_back(porphan);
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porphan->setDependsOn.insert(txin.prevout.hash);
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nTotalIn += mempool.mapTx.find(txin.prevout.hash)->GetTx().vout[txin.prevout.n].nValue;
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continue;
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}
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const CCoins* coins = view.AccessCoins(txin.prevout.hash);
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assert(coins);
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CAmount nValueIn = coins->vout[txin.prevout.n].nValue;
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nTotalIn += nValueIn;
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int nConf = nHeight - coins->nHeight;
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|
dPriority += (double)nValueIn * nConf;
|
|
}
|
|
nTotalIn += tx.GetShieldedValueIn();
|
|
|
|
if (fMissingInputs) continue;
|
|
|
|
// Priority is sum(valuein * age) / modified_txsize
|
|
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
|
dPriority = tx.ComputePriority(dPriority, nTxSize);
|
|
|
|
uint256 hash = tx.GetHash();
|
|
mempool.ApplyDeltas(hash, dPriority, nTotalIn);
|
|
|
|
CAmount feePaid = nTotalIn - tx.GetValueOut();
|
|
CFeeRate feeRate(feePaid, nTxSize);
|
|
|
|
if (porphan)
|
|
{
|
|
porphan->dPriority = dPriority;
|
|
porphan->feeRate = feeRate;
|
|
porphan->feePaid = feePaid;
|
|
}
|
|
else
|
|
vecPriority.push_back(TxPriority(dPriority, feeRate, feePaid, &(mi->GetTx())));
|
|
}
|
|
}
|
|
|
|
// Collect transactions into block
|
|
uint64_t nBlockSize = 1000;
|
|
uint64_t nBlockTx = 0;
|
|
int nBlockSigOps = 100;
|
|
bool fSortedByFee = (nBlockPrioritySize <= 0);
|
|
|
|
TxPriorityCompare comparer(fSortedByFee);
|
|
std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
|
|
// We want to track the value pool, but if the miner gets
|
|
// invoked on an old block before the hardcoded fallback
|
|
// is active we don't want to trip up any assertions. So,
|
|
// we only adhere to the turnstile (as a miner) if we
|
|
// actually have all of the information necessary to do
|
|
// so.
|
|
CAmount sproutValue = 0;
|
|
CAmount saplingValue = 0;
|
|
CAmount orchardValue = 0;
|
|
bool monitoring_pool_balances = true;
|
|
if (chainparams.ZIP209Enabled()) {
|
|
if (pindexPrev->nChainSproutValue) {
|
|
sproutValue = *pindexPrev->nChainSproutValue;
|
|
} else {
|
|
monitoring_pool_balances = false;
|
|
}
|
|
if (pindexPrev->nChainSaplingValue) {
|
|
saplingValue = *pindexPrev->nChainSaplingValue;
|
|
} else {
|
|
monitoring_pool_balances = false;
|
|
}
|
|
if (pindexPrev->nChainOrchardValue) {
|
|
orchardValue = *pindexPrev->nChainOrchardValue;
|
|
} else {
|
|
monitoring_pool_balances = false;
|
|
}
|
|
}
|
|
|
|
LogPrintf("%s: Evaluating %u transactions for inclusion in block.", __func__, vecPriority.size());
|
|
while (!vecPriority.empty())
|
|
{
|
|
// Take highest priority transaction off the priority queue:
|
|
double dPriority = vecPriority.front().get<0>();
|
|
CFeeRate feeRate = vecPriority.front().get<1>();
|
|
CAmount feePaid = vecPriority.front().get<2>();
|
|
const CTransaction& tx = *(vecPriority.front().get<3>());
|
|
const uint256& hash = tx.GetHash();
|
|
|
|
std::pop_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
vecPriority.pop_back();
|
|
|
|
// Size limits
|
|
unsigned int nTxSize = ::GetSerializeSize(tx, SER_NETWORK, PROTOCOL_VERSION);
|
|
if (nBlockSize + nTxSize >= nBlockMaxSize) {
|
|
LogPrintf("%s: skipping tx %s: exceeded maximum block size %u.", __func__, hash.GetHex(), nBlockMaxSize);
|
|
continue;
|
|
}
|
|
|
|
// Legacy limits on sigOps:
|
|
unsigned int nTxSigOps = GetLegacySigOpCount(tx);
|
|
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS) {
|
|
LogPrintf("%s: skipping tx %s: exceeds legacy max sigops %u.", __func__, hash.GetHex(), MAX_BLOCK_SIGOPS);
|
|
continue;
|
|
}
|
|
|
|
// Skip free transactions if we're past the minimum block size:
|
|
double dPriorityDelta = 0;
|
|
CAmount nFeeDelta = 0;
|
|
mempool.ApplyDeltas(hash, dPriorityDelta, nFeeDelta);
|
|
if (fSortedByFee &&
|
|
(dPriorityDelta <= 0) &&
|
|
(nFeeDelta <= 0) &&
|
|
(feeRate < ::minRelayTxFee) &&
|
|
(feePaid < DEFAULT_FEE) &&
|
|
(nBlockSize + nTxSize >= nBlockMinSize))
|
|
{
|
|
LogPrintf(
|
|
"%s: skipping free tx %s (fee is %i; %s) with size %u, current block size is %u & already have minimum block size %u.",
|
|
__func__, hash.GetHex(),
|
|
feePaid, feeRate.ToString(), nTxSize, nBlockSize, nBlockMinSize);
|
|
continue;
|
|
}
|
|
|
|
// Prioritise by fee once past the priority size or we run out of high-priority
|
|
// transactions:
|
|
if (!fSortedByFee &&
|
|
((nBlockSize + nTxSize >= nBlockPrioritySize) || !AllowFree(dPriority)))
|
|
{
|
|
fSortedByFee = true;
|
|
comparer = TxPriorityCompare(fSortedByFee);
|
|
std::make_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
}
|
|
|
|
if (!view.HaveInputs(tx)) {
|
|
LogPrintf("%s: not including tx %s; missing inputs.", __func__, hash.GetHex());
|
|
continue;
|
|
}
|
|
|
|
CAmount nTxFees = view.GetValueIn(tx)-tx.GetValueOut();
|
|
|
|
nTxSigOps += GetP2SHSigOpCount(tx, view);
|
|
if (nBlockSigOps + nTxSigOps >= MAX_BLOCK_SIGOPS) {
|
|
LogPrintf("%s: skipping tx %s: exceeds p2sh max sigops %u.", __func__, hash.GetHex(), MAX_BLOCK_SIGOPS);
|
|
continue;
|
|
}
|
|
|
|
std::vector<CTxOut> allPrevOutputs;
|
|
for (const auto& input : tx.vin) {
|
|
allPrevOutputs.push_back(view.GetOutputFor(input));
|
|
}
|
|
|
|
// Note that flags: we don't want to set mempool/IsStandard()
|
|
// policy here, but we still have to ensure that the block we
|
|
// create only contains transactions that are valid in new blocks.
|
|
CValidationState state;
|
|
PrecomputedTransactionData txdata(tx, allPrevOutputs);
|
|
if (!ContextualCheckInputs(tx, state, view, true, MANDATORY_SCRIPT_VERIFY_FLAGS, true, txdata, chainparams.GetConsensus(), consensusBranchId)) {
|
|
LogPrintf("%s: skipping tx %s: Failed contextual inputs check.", __func__, hash.GetHex());
|
|
continue;
|
|
}
|
|
|
|
if (chainparams.ZIP209Enabled() && monitoring_pool_balances) {
|
|
// Does this transaction lead to a turnstile violation?
|
|
|
|
CAmount sproutValueDummy = sproutValue;
|
|
CAmount saplingValueDummy = saplingValue;
|
|
CAmount orchardValueDummy = orchardValue;
|
|
|
|
saplingValueDummy += -tx.GetValueBalanceSapling();
|
|
orchardValueDummy += -tx.GetOrchardBundle().GetValueBalance();
|
|
|
|
for (auto js : tx.vJoinSplit) {
|
|
sproutValueDummy += js.vpub_old;
|
|
sproutValueDummy -= js.vpub_new;
|
|
}
|
|
|
|
if (sproutValueDummy < 0) {
|
|
LogPrintf("%s: tx %s appears to violate Sprout turnstile\n", __func__, hash.GetHex());
|
|
continue;
|
|
}
|
|
if (saplingValueDummy < 0) {
|
|
LogPrintf("%s: tx %s appears to violate Sapling turnstile\n", __func__, hash.GetHex());
|
|
continue;
|
|
}
|
|
if (orchardValueDummy < 0) {
|
|
LogPrintf("%s: tx %s appears to violate Orchard turnstile\n", __func__, hash.GetHex());
|
|
continue;
|
|
}
|
|
|
|
sproutValue = sproutValueDummy;
|
|
saplingValue = saplingValueDummy;
|
|
orchardValue = orchardValueDummy;
|
|
}
|
|
|
|
UpdateCoins(tx, view, nHeight);
|
|
|
|
// Added
|
|
pblock->vtx.push_back(tx);
|
|
pblocktemplate->vTxFees.push_back(nTxFees);
|
|
pblocktemplate->vTxSigOps.push_back(nTxSigOps);
|
|
nBlockSize += nTxSize;
|
|
++nBlockTx;
|
|
nBlockSigOps += nTxSigOps;
|
|
nFees += nTxFees;
|
|
|
|
if (fPrintPriority)
|
|
{
|
|
LogPrintf("%s: priority %.1f fee %s txid %s\n",
|
|
__func__, dPriority, feeRate.ToString(), hash.GetHex());
|
|
}
|
|
|
|
// Add transactions that depend on this one to the priority queue
|
|
if (mapDependers.count(hash))
|
|
{
|
|
for (COrphan* porphan : mapDependers[hash])
|
|
{
|
|
if (!porphan->setDependsOn.empty())
|
|
{
|
|
porphan->setDependsOn.erase(hash);
|
|
if (porphan->setDependsOn.empty())
|
|
{
|
|
vecPriority.push_back(TxPriority(porphan->dPriority, porphan->feeRate, porphan->feePaid, porphan->ptx));
|
|
std::push_heap(vecPriority.begin(), vecPriority.end(), comparer);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
last_block_num_txs = nBlockTx;
|
|
last_block_size = nBlockSize;
|
|
LogPrintf("%s: total tx: %u; total size: %u (excluding coinbase)", __func__, nBlockTx, nBlockSize);
|
|
|
|
// Create coinbase tx
|
|
if (next_cb_mtx) {
|
|
pblock->vtx[0] = *next_cb_mtx;
|
|
} else {
|
|
pblock->vtx[0] = CreateCoinbaseTransaction(chainparams, nFees, minerAddress, nHeight);
|
|
}
|
|
pblocktemplate->vTxFees[0] = -nFees;
|
|
|
|
// Update the Sapling commitment tree.
|
|
for (const CTransaction& tx : pblock->vtx) {
|
|
for (const OutputDescription& odesc : tx.vShieldedOutput) {
|
|
sapling_tree.append(odesc.cmu);
|
|
}
|
|
}
|
|
|
|
// Randomise nonce
|
|
arith_uint256 nonce = UintToArith256(GetRandHash());
|
|
// Clear the top and bottom 16 bits (for local use as thread flags and counters)
|
|
nonce <<= 32;
|
|
nonce >>= 16;
|
|
pblock->nNonce = ArithToUint256(nonce);
|
|
|
|
uint32_t prevConsensusBranchId = CurrentEpochBranchId(pindexPrev->nHeight, chainparams.GetConsensus());
|
|
|
|
// Fill in header
|
|
pblock->hashPrevBlock = pindexPrev->GetBlockHash();
|
|
if (chainparams.GetConsensus().NetworkUpgradeActive(nHeight, Consensus::UPGRADE_NU5)) {
|
|
// hashBlockCommitments depends on the block transactions, so we have to
|
|
// update it whenever the coinbase transaction changes.
|
|
//
|
|
// - For the internal miner (either directly or via the `generate` RPC), this
|
|
// will occur in `IncrementExtraNonce()`, like for `hashMerkleRoot`.
|
|
// - For `getblocktemplate`, we have two sets of fields to handle:
|
|
// - The `defaultroots` fields, which contain both the default value (if
|
|
// nothing in the template is altered), and the roots that can be used to
|
|
// recalculate it (if some or all of the template is altered).
|
|
// - The legacy `finalsaplingroothash`, `lightclientroothash`, and
|
|
// `blockcommitmentshash` fields, which had the semantics of "place this
|
|
// value into the block header and things will work" (except for in
|
|
// v4.6.0 where they were accidentally set to always be the NU5 value).
|
|
//
|
|
// To accommodate all use cases, we calculate the `hashBlockCommitments`
|
|
// default value here (unlike `hashMerkleRoot`), and additionally cache the
|
|
// values necessary to recalculate it.
|
|
pblocktemplate->hashChainHistoryRoot = view.GetHistoryRoot(prevConsensusBranchId);
|
|
pblocktemplate->hashAuthDataRoot = pblock->BuildAuthDataMerkleTree();
|
|
pblock->hashBlockCommitments = DeriveBlockCommitmentsHash(
|
|
pblocktemplate->hashChainHistoryRoot,
|
|
pblocktemplate->hashAuthDataRoot);
|
|
} else if (IsActivationHeight(nHeight, chainparams.GetConsensus(), Consensus::UPGRADE_HEARTWOOD)) {
|
|
pblocktemplate->hashChainHistoryRoot.SetNull();
|
|
pblocktemplate->hashAuthDataRoot.SetNull();
|
|
pblock->hashBlockCommitments.SetNull();
|
|
} else if (chainparams.GetConsensus().NetworkUpgradeActive(nHeight, Consensus::UPGRADE_HEARTWOOD)) {
|
|
pblocktemplate->hashChainHistoryRoot = view.GetHistoryRoot(prevConsensusBranchId);
|
|
pblocktemplate->hashAuthDataRoot.SetNull();
|
|
pblock->hashBlockCommitments = pblocktemplate->hashChainHistoryRoot;
|
|
} else {
|
|
pblocktemplate->hashChainHistoryRoot.SetNull();
|
|
pblocktemplate->hashAuthDataRoot.SetNull();
|
|
pblock->hashBlockCommitments = sapling_tree.root();
|
|
}
|
|
UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev);
|
|
pblock->nBits = GetNextWorkRequired(pindexPrev, pblock, chainparams.GetConsensus());
|
|
pblock->nSolution.clear();
|
|
pblocktemplate->vTxSigOps[0] = GetLegacySigOpCount(pblock->vtx[0]);
|
|
|
|
CValidationState state;
|
|
if (!TestBlockValidity(state, chainparams, *pblock, pindexPrev, true))
|
|
throw std::runtime_error(std::string("CreateNewBlock(): TestBlockValidity failed: ") + state.GetRejectReason());
|
|
}
|
|
|
|
return pblocktemplate.release();
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// Internal miner
|
|
//
|
|
|
|
#ifdef ENABLE_MINING
|
|
|
|
class MinerAddressScript : public CReserveScript
|
|
{
|
|
// CReserveScript requires implementing this function, so that if an
|
|
// internal (not-visible) wallet address is used, the wallet can mark it as
|
|
// important when a block is mined (so it then appears to the user).
|
|
// If -mineraddress is set, the user already knows about and is managing the
|
|
// address, so we don't need to do anything here.
|
|
void KeepScript() {}
|
|
};
|
|
|
|
std::optional<MinerAddress> ExtractMinerAddress::operator()(const CKeyID &keyID) const {
|
|
boost::shared_ptr<MinerAddressScript> mAddr(new MinerAddressScript());
|
|
mAddr->reserveScript = CScript() << OP_DUP << OP_HASH160 << ToByteVector(keyID) << OP_EQUALVERIFY << OP_CHECKSIG;
|
|
return mAddr;
|
|
}
|
|
std::optional<MinerAddress> ExtractMinerAddress::operator()(const CScriptID &addr) const {
|
|
return std::nullopt;
|
|
}
|
|
std::optional<MinerAddress> ExtractMinerAddress::operator()(const libzcash::SproutPaymentAddress &addr) const {
|
|
return std::nullopt;
|
|
}
|
|
std::optional<MinerAddress> ExtractMinerAddress::operator()(const libzcash::SaplingPaymentAddress &addr) const {
|
|
return addr;
|
|
}
|
|
std::optional<MinerAddress> ExtractMinerAddress::operator()(const libzcash::UnifiedAddress &addr) const {
|
|
auto preferred = addr.GetPreferredRecipientAddress(consensus, height);
|
|
if (preferred.has_value()) {
|
|
std::optional<MinerAddress> ret;
|
|
std::visit(match {
|
|
[&](const libzcash::OrchardRawAddress addr) { ret = MinerAddress(addr); },
|
|
[&](const libzcash::SaplingPaymentAddress addr) { ret = MinerAddress(addr); },
|
|
[&](const CKeyID keyID) { ret = operator()(keyID); },
|
|
[&](const auto other) { ret = std::nullopt; }
|
|
}, preferred.value());
|
|
return ret;
|
|
} else {
|
|
return std::nullopt;
|
|
}
|
|
}
|
|
|
|
|
|
void GetMinerAddress(std::optional<MinerAddress> &minerAddress)
|
|
{
|
|
KeyIO keyIO(Params());
|
|
|
|
// If the user sets a UA miner address with an Orchard component, we want to ensure we
|
|
// start using it once we reach that height.
|
|
int height;
|
|
{
|
|
LOCK(cs_main);
|
|
height = chainActive.Height() + 1;
|
|
}
|
|
|
|
auto mAddrArg = GetArg("-mineraddress", "");
|
|
auto zaddr0 = keyIO.DecodePaymentAddress(mAddrArg);
|
|
if (zaddr0.has_value()) {
|
|
auto zaddr = std::visit(ExtractMinerAddress(Params().GetConsensus(), height), zaddr0.value());
|
|
if (zaddr.has_value()) {
|
|
minerAddress = zaddr.value();
|
|
}
|
|
}
|
|
}
|
|
|
|
void IncrementExtraNonce(
|
|
CBlockTemplate* pblocktemplate,
|
|
const CBlockIndex* pindexPrev,
|
|
unsigned int& nExtraNonce,
|
|
const Consensus::Params& consensusParams)
|
|
{
|
|
CBlock *pblock = &pblocktemplate->block;
|
|
// Update nExtraNonce
|
|
static uint256 hashPrevBlock;
|
|
if (hashPrevBlock != pblock->hashPrevBlock)
|
|
{
|
|
nExtraNonce = 0;
|
|
hashPrevBlock = pblock->hashPrevBlock;
|
|
}
|
|
++nExtraNonce;
|
|
unsigned int nHeight = pindexPrev->nHeight+1; // Height first in coinbase required for block.version=2
|
|
CMutableTransaction txCoinbase(pblock->vtx[0]);
|
|
txCoinbase.vin[0].scriptSig = (CScript() << nHeight << CScriptNum(nExtraNonce)) + COINBASE_FLAGS;
|
|
assert(txCoinbase.vin[0].scriptSig.size() <= 100);
|
|
|
|
pblock->vtx[0] = txCoinbase;
|
|
pblock->hashMerkleRoot = BlockMerkleRoot(*pblock);
|
|
if (consensusParams.NetworkUpgradeActive(nHeight, Consensus::UPGRADE_NU5)) {
|
|
pblocktemplate->hashAuthDataRoot = pblock->BuildAuthDataMerkleTree();
|
|
pblock->hashBlockCommitments = DeriveBlockCommitmentsHash(
|
|
pblocktemplate->hashChainHistoryRoot,
|
|
pblocktemplate->hashAuthDataRoot);
|
|
}
|
|
}
|
|
|
|
static bool ProcessBlockFound(const CBlock* pblock, const CChainParams& chainparams)
|
|
{
|
|
LogPrintf("%s\n", pblock->ToString());
|
|
LogPrintf("generated %s\n", FormatMoney(pblock->vtx[0].vout[0].nValue));
|
|
|
|
// Found a solution
|
|
{
|
|
LOCK(cs_main);
|
|
if (pblock->hashPrevBlock != chainActive.Tip()->GetBlockHash())
|
|
return error("ZcashMiner: generated block is stale");
|
|
}
|
|
|
|
// Inform about the new block
|
|
GetMainSignals().BlockFound(pblock->GetHash());
|
|
|
|
// Process this block the same as if we had received it from another node
|
|
CValidationState state;
|
|
if (!ProcessNewBlock(state, chainparams, NULL, pblock, true, NULL))
|
|
return error("ZcashMiner: ProcessNewBlock, block not accepted");
|
|
|
|
TrackMinedBlock(pblock->GetHash());
|
|
|
|
return true;
|
|
}
|
|
|
|
void static BitcoinMiner(const CChainParams& chainparams)
|
|
{
|
|
LogPrintf("ZcashMiner started\n");
|
|
SetThreadPriority(THREAD_PRIORITY_LOWEST);
|
|
RenameThread("zcash-miner");
|
|
|
|
// Each thread has its own counter
|
|
unsigned int nExtraNonce = 0;
|
|
|
|
std::optional<MinerAddress> maybeMinerAddress;
|
|
GetMainSignals().AddressForMining(maybeMinerAddress);
|
|
|
|
unsigned int n = chainparams.GetConsensus().nEquihashN;
|
|
unsigned int k = chainparams.GetConsensus().nEquihashK;
|
|
|
|
std::string solver = GetArg("-equihashsolver", "default");
|
|
assert(solver == "tromp" || solver == "default");
|
|
LogPrint("pow", "Using Equihash solver \"%s\" with n = %u, k = %u\n", solver, n, k);
|
|
|
|
std::mutex m_cs;
|
|
bool cancelSolver = false;
|
|
boost::signals2::connection c = uiInterface.NotifyBlockTip.connect(
|
|
[&m_cs, &cancelSolver](bool, const CBlockIndex *) mutable {
|
|
std::lock_guard<std::mutex> lock{m_cs};
|
|
cancelSolver = true;
|
|
}
|
|
);
|
|
miningTimer.start();
|
|
|
|
try {
|
|
// Throw an error if no address valid for mining was provided.
|
|
if (!(maybeMinerAddress.has_value() && std::visit(IsValidMinerAddress(), maybeMinerAddress.value()))) {
|
|
throw std::runtime_error("No miner address available (mining requires a wallet or -mineraddress)");
|
|
}
|
|
auto minerAddress = maybeMinerAddress.value();
|
|
|
|
while (true) {
|
|
if (chainparams.MiningRequiresPeers()) {
|
|
// Busy-wait for the network to come online so we don't waste time mining
|
|
// on an obsolete chain. In regtest mode we expect to fly solo.
|
|
miningTimer.stop();
|
|
do {
|
|
bool fvNodesEmpty;
|
|
{
|
|
LOCK(cs_vNodes);
|
|
fvNodesEmpty = vNodes.empty();
|
|
}
|
|
if (!fvNodesEmpty && !IsInitialBlockDownload(chainparams.GetConsensus()))
|
|
break;
|
|
MilliSleep(1000);
|
|
} while (true);
|
|
miningTimer.start();
|
|
}
|
|
|
|
//
|
|
// Create new block
|
|
//
|
|
unsigned int nTransactionsUpdatedLast = mempool.GetTransactionsUpdated();
|
|
CBlockIndex* pindexPrev;
|
|
{
|
|
LOCK(cs_main);
|
|
pindexPrev = chainActive.Tip();
|
|
}
|
|
|
|
// If we don't have a valid chain tip to work from, wait and try again.
|
|
if (pindexPrev == nullptr) {
|
|
MilliSleep(1000);
|
|
continue;
|
|
}
|
|
|
|
unique_ptr<CBlockTemplate> pblocktemplate(CreateNewBlock(chainparams, minerAddress));
|
|
if (!pblocktemplate.get())
|
|
{
|
|
if (GetArg("-mineraddress", "").empty()) {
|
|
LogPrintf("Error in ZcashMiner: Keypool ran out, please call keypoolrefill before restarting the mining thread\n");
|
|
} else {
|
|
// Should never reach here, because -mineraddress validity is checked in init.cpp
|
|
LogPrintf("Error in ZcashMiner: Invalid -mineraddress\n");
|
|
}
|
|
return;
|
|
}
|
|
CBlock *pblock = &pblocktemplate->block;
|
|
IncrementExtraNonce(pblocktemplate.get(), pindexPrev, nExtraNonce, chainparams.GetConsensus());
|
|
|
|
LogPrintf("Running ZcashMiner with %u transactions in block (%u bytes)\n", pblock->vtx.size(),
|
|
::GetSerializeSize(*pblock, SER_NETWORK, PROTOCOL_VERSION));
|
|
|
|
//
|
|
// Search
|
|
//
|
|
int64_t nStart = GetTime();
|
|
arith_uint256 hashTarget = arith_uint256().SetCompact(pblock->nBits);
|
|
|
|
while (true) {
|
|
// Hash state
|
|
eh_HashState state = EhInitialiseState(n, k);
|
|
|
|
// I = the block header minus nonce and solution.
|
|
CEquihashInput I{*pblock};
|
|
CDataStream ss(SER_NETWORK, PROTOCOL_VERSION);
|
|
ss << I;
|
|
|
|
// H(I||...
|
|
state.Update((unsigned char*)&ss[0], ss.size());
|
|
|
|
// H(I||V||...
|
|
eh_HashState curr_state = state;
|
|
curr_state.Update(pblock->nNonce.begin(), pblock->nNonce.size());
|
|
|
|
// (x_1, x_2, ...) = A(I, V, n, k)
|
|
LogPrint("pow", "Running Equihash solver \"%s\" with nNonce = %s\n",
|
|
solver, pblock->nNonce.ToString());
|
|
|
|
std::function<bool(std::vector<unsigned char>)> validBlock =
|
|
[&pblock, &hashTarget, &chainparams, &m_cs, &cancelSolver, &minerAddress]
|
|
(std::vector<unsigned char> soln) {
|
|
// Write the solution to the hash and compute the result.
|
|
LogPrint("pow", "- Checking solution against target\n");
|
|
pblock->nSolution = soln;
|
|
solutionTargetChecks.increment();
|
|
|
|
if (UintToArith256(pblock->GetHash()) > hashTarget) {
|
|
return false;
|
|
}
|
|
|
|
// Found a solution
|
|
SetThreadPriority(THREAD_PRIORITY_NORMAL);
|
|
LogPrintf("ZcashMiner:\n");
|
|
LogPrintf("proof-of-work found \n hash: %s \ntarget: %s\n", pblock->GetHash().GetHex(), hashTarget.GetHex());
|
|
if (ProcessBlockFound(pblock, chainparams)) {
|
|
// Ignore chain updates caused by us
|
|
std::lock_guard<std::mutex> lock{m_cs};
|
|
cancelSolver = false;
|
|
}
|
|
SetThreadPriority(THREAD_PRIORITY_LOWEST);
|
|
std::visit(KeepMinerAddress(), minerAddress);
|
|
|
|
// In regression test mode, stop mining after a block is found.
|
|
if (chainparams.MineBlocksOnDemand()) {
|
|
// Increment here because throwing skips the call below
|
|
ehSolverRuns.increment();
|
|
throw boost::thread_interrupted();
|
|
}
|
|
|
|
return true;
|
|
};
|
|
std::function<bool(EhSolverCancelCheck)> cancelled = [&m_cs, &cancelSolver](EhSolverCancelCheck pos) {
|
|
std::lock_guard<std::mutex> lock{m_cs};
|
|
return cancelSolver;
|
|
};
|
|
|
|
// TODO: factor this out into a function with the same API for each solver.
|
|
if (solver == "tromp") {
|
|
// Create solver and initialize it.
|
|
equi eq(1);
|
|
eq.setstate(curr_state.inner);
|
|
|
|
// Initialization done, start algo driver.
|
|
eq.digit0(0);
|
|
eq.xfull = eq.bfull = eq.hfull = 0;
|
|
eq.showbsizes(0);
|
|
for (u32 r = 1; r < WK; r++) {
|
|
(r&1) ? eq.digitodd(r, 0) : eq.digiteven(r, 0);
|
|
eq.xfull = eq.bfull = eq.hfull = 0;
|
|
eq.showbsizes(r);
|
|
}
|
|
eq.digitK(0);
|
|
ehSolverRuns.increment();
|
|
|
|
// Convert solution indices to byte array (decompress) and pass it to validBlock method.
|
|
for (size_t s = 0; s < std::min(MAXSOLS, eq.nsols); s++) {
|
|
LogPrint("pow", "Checking solution %d\n", s+1);
|
|
std::vector<eh_index> index_vector(PROOFSIZE);
|
|
for (size_t i = 0; i < PROOFSIZE; i++) {
|
|
index_vector[i] = eq.sols[s][i];
|
|
}
|
|
std::vector<unsigned char> sol_char = GetMinimalFromIndices(index_vector, DIGITBITS);
|
|
|
|
if (validBlock(sol_char)) {
|
|
// If we find a POW solution, do not try other solutions
|
|
// because they become invalid as we created a new block in blockchain.
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
try {
|
|
// If we find a valid block, we rebuild
|
|
bool found = EhOptimisedSolve(n, k, curr_state, validBlock, cancelled);
|
|
ehSolverRuns.increment();
|
|
if (found) {
|
|
break;
|
|
}
|
|
} catch (EhSolverCancelledException&) {
|
|
LogPrint("pow", "Equihash solver cancelled\n");
|
|
std::lock_guard<std::mutex> lock{m_cs};
|
|
cancelSolver = false;
|
|
}
|
|
}
|
|
|
|
// Check for stop or if block needs to be rebuilt
|
|
boost::this_thread::interruption_point();
|
|
// Regtest mode doesn't require peers
|
|
if (vNodes.empty() && chainparams.MiningRequiresPeers())
|
|
break;
|
|
if ((UintToArith256(pblock->nNonce) & 0xffff) == 0xffff)
|
|
break;
|
|
if (mempool.GetTransactionsUpdated() != nTransactionsUpdatedLast && GetTime() - nStart > 60)
|
|
break;
|
|
if (pindexPrev != chainActive.Tip())
|
|
break;
|
|
|
|
// Update nNonce and nTime
|
|
pblock->nNonce = ArithToUint256(UintToArith256(pblock->nNonce) + 1);
|
|
UpdateTime(pblock, chainparams.GetConsensus(), pindexPrev);
|
|
if (chainparams.GetConsensus().nPowAllowMinDifficultyBlocksAfterHeight != std::nullopt)
|
|
{
|
|
// Changing pblock->nTime can change work required on testnet:
|
|
hashTarget.SetCompact(pblock->nBits);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
catch (const boost::thread_interrupted&)
|
|
{
|
|
miningTimer.stop();
|
|
c.disconnect();
|
|
LogPrintf("ZcashMiner terminated\n");
|
|
throw;
|
|
}
|
|
catch (const std::runtime_error &e)
|
|
{
|
|
miningTimer.stop();
|
|
c.disconnect();
|
|
LogPrintf("ZcashMiner runtime error: %s\n", e.what());
|
|
return;
|
|
}
|
|
miningTimer.stop();
|
|
c.disconnect();
|
|
}
|
|
|
|
void GenerateBitcoins(bool fGenerate, int nThreads, const CChainParams& chainparams)
|
|
{
|
|
static boost::thread_group* minerThreads = NULL;
|
|
|
|
if (nThreads < 0)
|
|
nThreads = GetNumCores();
|
|
|
|
if (minerThreads != NULL)
|
|
{
|
|
minerThreads->interrupt_all();
|
|
minerThreads->join_all();
|
|
delete minerThreads;
|
|
minerThreads = NULL;
|
|
}
|
|
|
|
if (nThreads == 0 || !fGenerate)
|
|
return;
|
|
|
|
minerThreads = new boost::thread_group();
|
|
for (int i = 0; i < nThreads; i++) {
|
|
minerThreads->create_thread(boost::bind(&BitcoinMiner, boost::cref(chainparams)));
|
|
}
|
|
}
|
|
|
|
#endif // ENABLE_MINING
|