mirror of
https://github.com/feather-wallet/feather.git
synced 2024-12-22 19:49:28 +00:00
102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
// SPDX-License-Identifier: BSD-3-Clause
|
|
// SPDX-FileCopyrightText: 2020-2024 The Monero Project
|
|
|
|
#ifndef FEATHER_RESTOREHEIGHTLOOKUP_H
|
|
#define FEATHER_RESTOREHEIGHTLOOKUP_H
|
|
|
|
#include <cstdio>
|
|
#include <cstdlib>
|
|
|
|
#include "monero_seed/monero_seed.hpp"
|
|
|
|
#include "networktype.h"
|
|
#include "utils/Utils.h"
|
|
|
|
struct RestoreHeightLookup {
|
|
NetworkType::Type type;
|
|
QMap<time_t, int> data;
|
|
explicit RestoreHeightLookup(NetworkType::Type type) : type(type) {}
|
|
|
|
int dateToHeight(time_t date) {
|
|
// restore height based on a given timestamp using a lookup
|
|
// table. If it cannot find the date in the lookup table, it
|
|
// will calculate the blockheight based off the last known
|
|
// date: ((now - lastKnownDate) / blockTime) - clearance
|
|
|
|
if (this->type == NetworkType::TESTNET) {
|
|
return 1;
|
|
}
|
|
|
|
int blockTime = 120;
|
|
int blocksPerDay = 720;
|
|
int blockCalcClearance = blocksPerDay * 5;
|
|
|
|
QList<time_t> values = this->data.keys();
|
|
|
|
// If timestamp is before epoch, return genesis height.
|
|
if (date <= values.at(0)) {
|
|
return 1;
|
|
}
|
|
|
|
for (int i = 0; i != values.count(); i++) {
|
|
if (values[i] > date) {
|
|
if (i == 0) {
|
|
return 1;
|
|
}
|
|
return this->data[values[i-1]] - blockCalcClearance;
|
|
}
|
|
}
|
|
|
|
// lookup failed, calculate blockheight from last known checkpoint
|
|
time_t lastBlockHeightTime = values.last();
|
|
int lastBlockHeight = this->data[lastBlockHeightTime];
|
|
|
|
time_t deltaTime = date - lastBlockHeightTime;
|
|
int deltaBlocks = deltaTime / blockTime;
|
|
|
|
int blockHeight = (lastBlockHeight + deltaBlocks) - blockCalcClearance;
|
|
return blockHeight;
|
|
}
|
|
|
|
time_t heightToTimestamp(int height) {
|
|
// @TODO: most likely inefficient, refactor
|
|
QMap<time_t, int>::iterator i;
|
|
time_t timestamp = 0;
|
|
int heightData = 1;
|
|
for (i = this->data.begin(); i != this->data.end(); ++i) {
|
|
time_t ts = i.key();
|
|
if (i.value() > height)
|
|
return timestamp;
|
|
timestamp = ts;
|
|
heightData = i.value();
|
|
}
|
|
|
|
while (heightData < height) {
|
|
heightData += 720; // blocks per day
|
|
timestamp += 86400; // seconds in day
|
|
}
|
|
|
|
return timestamp;
|
|
}
|
|
|
|
QDateTime heightToDate(int height) {
|
|
return QDateTime::fromSecsSinceEpoch(this->heightToTimestamp(height));
|
|
}
|
|
|
|
static RestoreHeightLookup *fromFile(const QString &fn, NetworkType::Type type) {
|
|
// initialize this class using a lookup table, e.g `:/assets/restore_heights_monero_mainnet.txt`/
|
|
auto rtn = new RestoreHeightLookup(type);
|
|
auto data= Utils::barrayToString(Utils::fileOpen(fn));
|
|
|
|
for (const auto &line: data.split('\n')) {
|
|
if (line.trimmed().isEmpty()) {
|
|
continue;
|
|
}
|
|
auto spl = line.trimmed().split(':');
|
|
rtn->data[(time_t)spl.at(0).toInt()] = spl.at(1).toInt();
|
|
}
|
|
return rtn;
|
|
}
|
|
};
|
|
|
|
#endif //FEATHER_RESTOREHEIGHTLOOKUP_H
|