be16f80abc
Any projects which want to use Hush code from now on will need to be licensed as GPLv3 or we will send the lawyers: https://www.softwarefreedom.org/ Notably, Komodo (KMD) is licensed as GPLv2 and is no longer compatible to receive code changes, without causing legal issues. MIT projects, such as Zcash, also cannot pull in changes from the Hush Full Node without permission from The Hush Developers, which may in some circumstances grant an MIT license on a case-by-case basis.
106 lines
4.7 KiB
C++
106 lines
4.7 KiB
C++
// Copyright (c) 2009-2014 The Bitcoin Core developers
|
|
// Copyright (c) 2019-2020 The Hush developers
|
|
// Distributed under the GPLv3 software license, see the accompanying
|
|
// file COPYING or https://www.gnu.org/licenses/gpl-3.0.en.html
|
|
|
|
/******************************************************************************
|
|
* Copyright © 2014-2019 The SuperNET Developers. *
|
|
* *
|
|
* See the AUTHORS, DEVELOPER-AGREEMENT and LICENSE files at *
|
|
* the top-level directory of this distribution for the individual copyright *
|
|
* holder information and the developer policies on copyright and licensing. *
|
|
* *
|
|
* Unless otherwise agreed in a custom licensing agreement, no part of the *
|
|
* SuperNET software, including this file may be copied, modified, propagated *
|
|
* or distributed except according to the terms contained in the LICENSE file *
|
|
* *
|
|
* Removal or modification of this copyright notice is prohibited. *
|
|
* *
|
|
******************************************************************************/
|
|
|
|
#include "checkpoints.h"
|
|
|
|
#include "chainparams.h"
|
|
#include "main.h"
|
|
#include "uint256.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
#include <boost/foreach.hpp>
|
|
|
|
namespace Checkpoints {
|
|
|
|
/**
|
|
* How many times slower we expect checking transactions after the last
|
|
* checkpoint to be (from checking signatures, which is skipped up to the
|
|
* last checkpoint). This number is a compromise, as it can't be accurate
|
|
* for every system. When reindexing from a fast disk with a slow CPU, it
|
|
* can be up to 20, while when downloading from a slow network with a
|
|
* fast multicore CPU, it won't be much higher than 1.
|
|
*/
|
|
static const double SIGCHECK_VERIFICATION_FACTOR = 5.0;
|
|
bool CheckBlock(const CChainParams::CCheckpointData& data, int nHeight, const uint256& hash)
|
|
{
|
|
const MapCheckpoints& checkpoints = data.mapCheckpoints;
|
|
|
|
MapCheckpoints::const_iterator i = checkpoints.find(nHeight);
|
|
if (i == checkpoints.end()) return true;
|
|
return hash == i->second;
|
|
}
|
|
|
|
//! Guess how far we are in the verification process at the given block index
|
|
double GuessVerificationProgress(const CChainParams::CCheckpointData& data, CBlockIndex *pindex, bool fSigchecks) {
|
|
if (pindex==NULL)
|
|
return 0.0;
|
|
|
|
int64_t nNow = time(NULL);
|
|
|
|
double fSigcheckVerificationFactor = fSigchecks ? SIGCHECK_VERIFICATION_FACTOR : 1.0;
|
|
double fWorkBefore = 0.0; // Amount of work done before pindex
|
|
double fWorkAfter = 0.0; // Amount of work left after pindex (estimated)
|
|
// Work is defined as: 1.0 per transaction before the last checkpoint, and
|
|
// fSigcheckVerificationFactor per transaction after.
|
|
|
|
if (pindex->nChainTx <= data.nTransactionsLastCheckpoint) {
|
|
double nCheapBefore = pindex->nChainTx;
|
|
double nCheapAfter = data.nTransactionsLastCheckpoint - pindex->nChainTx;
|
|
double nExpensiveAfter = (nNow - data.nTimeLastCheckpoint)/86400.0*data.fTransactionsPerDay;
|
|
fWorkBefore = nCheapBefore;
|
|
fWorkAfter = nCheapAfter + nExpensiveAfter*fSigcheckVerificationFactor;
|
|
} else {
|
|
double nCheapBefore = data.nTransactionsLastCheckpoint;
|
|
double nExpensiveBefore = pindex->nChainTx - data.nTransactionsLastCheckpoint;
|
|
double nExpensiveAfter = (nNow - pindex->GetBlockTime())/86400.0*data.fTransactionsPerDay;
|
|
fWorkBefore = nCheapBefore + nExpensiveBefore*fSigcheckVerificationFactor;
|
|
fWorkAfter = nExpensiveAfter*fSigcheckVerificationFactor;
|
|
}
|
|
|
|
return std::min(fWorkBefore / (fWorkBefore + fWorkAfter), 1.0);
|
|
}
|
|
|
|
int GetTotalBlocksEstimate(const CChainParams::CCheckpointData& data)
|
|
{
|
|
const MapCheckpoints& checkpoints = data.mapCheckpoints;
|
|
|
|
if (checkpoints.empty())
|
|
return 0;
|
|
|
|
return checkpoints.rbegin()->first;
|
|
}
|
|
|
|
CBlockIndex* GetLastCheckpoint(const CChainParams::CCheckpointData& data)
|
|
{
|
|
const MapCheckpoints& checkpoints = data.mapCheckpoints;
|
|
|
|
BOOST_REVERSE_FOREACH(const MapCheckpoints::value_type& i, checkpoints)
|
|
{
|
|
const uint256& hash = i.second;
|
|
BlockMap::const_iterator t = mapBlockIndex.find(hash);
|
|
if (t != mapBlockIndex.end())
|
|
return t->second;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
} // namespace Checkpoints
|