Lookup table for restore heights and a blockheight calculation function

Software wallets that use this library for 14 word mnemonic seed(s) may now use `seed->blockheight()` to obtain the Wownero seed blockheight (restore height) - previously, software wallets had to implement this functionality themselves.
2 years ago · 5e876ceb84
parent 7830fddcc3
commit 5e876ceb84
6 changed files with 268 additions and 0 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -21,6 +21,7 @@ src/argon2/ref.c
 src/galois_field.cpp
 src/gf_elem.cpp
 src/gf_poly.cpp
+src/heights.cpp
 src/wownero_seed.cpp
 src/pbkdf2.c
 src/reed_solomon_code.cpp
--- a/include/wownero_seed/heights.hpp
+++ b/include/wownero_seed/heights.hpp
@ -0,0 +1,2 @@
+#pragma once
+unsigned int dateToRestoreHeight(time_t _t);
--- a/include/wownero_seed/wownero_seed.hpp
+++ b/include/wownero_seed/wownero_seed.hpp
@ -23,6 +23,7 @@ public:
 	std::time_t date() const {
 		return date_;
 	}
+    unsigned blockheight() const;
 	const std::string& correction() const {
 		return correction_;
 	}
--- a/src/heights.cpp
+++ b/src/heights.cpp
@ -0,0 +1,258 @@
+#include <iostream>
+#include <map>
+#include <string>
+#include <string_view>
+
+#include <wownero_seed/heights.hpp>
+
+std::map<unsigned int, unsigned int> heightLookup = {
+    {1522624244, 1},
+    {1523019716, 2000},
+    {1523798485, 4000},
+    {1524369547, 6000},
+    {1524928599, 8000},
+    {1525536409, 10000},
+    {1526135584, 12000},
+    {1526746540, 14000},
+    {1527366570, 16000},
+    {1527977555, 18000},
+    {1528596889, 20000},
+    {1529196634, 22000},
+    {1529812899, 24000},
+    {1530426833, 26000},
+    {1531043072, 28000},
+    {1531660804, 30000},
+    {1532267242, 32000},
+    {1532867728, 34000},
+    {1533470854, 36000},
+    {1534072871, 38000},
+    {1534666585, 40000},
+    {1535290349, 42000},
+    {1535889551, 44000},
+    {1536503490, 46000},
+    {1537109771, 48000},
+    {1537716080, 50000},
+    {1538321475, 52000},
+    {1538927269, 54000},
+    {1539529646, 56000},
+    {1540147604, 58000},
+    {1540788117, 60000},
+    {1541462710, 62000},
+    {1542141772, 64000},
+    {1543204218, 66000},
+    {1544189412, 68000},
+    {1545142715, 70000},
+    {1546002226, 72000},
+    {1546850714, 74000},
+    {1547960022, 76000},
+    {1548921502, 78000},
+    {1549693643, 80000},
+    {1550599183, 82000},
+    {1551184199, 84000},
+    {1551779594, 86000},
+    {1552398262, 88000},
+    {1552994646, 90000},
+    {1553601832, 92000},
+    {1554201779, 94000},
+    {1554801655, 96000},
+    {1555400363, 98000},
+    {1556001445, 100000},
+    {1556602014, 102000},
+    {1557214500, 104000},
+    {1557811286, 106000},
+    {1558413175, 108000},
+    {1559009373, 110000},
+    {1559610734, 112000},
+    {1560207825, 114000},
+    {1560778626, 116000},
+    {1561370593, 118000},
+    {1561983210, 120000},
+    {1562593362, 122000},
+    {1563205114, 124000},
+    {1563794760, 126000},
+    {1564403277, 128000},
+    {1564995864, 130000},
+    {1565606876, 132000},
+    {1566200716, 134000},
+    {1566794840, 136000},
+    {1567391114, 138000},
+    {1567989857, 140000},
+    {1568594389, 142000},
+    {1569196321, 144000},
+    {1569793216, 146000},
+    {1570390761, 148000},
+    {1570991907, 150000},
+    {1571598059, 152000},
+    {1572192822, 154000},
+    {1572791579, 156000},
+    {1573392270, 158000},
+    {1573987210, 160000},
+    {1574600312, 162000},
+    {1575203907, 164000},
+    {1575802276, 166000},
+    {1576401859, 168000},
+    {1577002032, 170000},
+    {1577598018, 172000},
+    {1578199780, 174000},
+    {1578802610, 176000},
+    {1579403148, 178000},
+    {1580004525, 180000},
+    {1580600038, 182000},
+    {1581202399, 184000},
+    {1581795609, 186000},
+    {1582398217, 188000},
+    {1583000366, 190000},
+    {1583601824, 192000},
+    {1584200913, 194000},
+    {1584796804, 196000},
+    {1585404000, 198000},
+    {1585987106, 200000},
+    {1586591709, 202000},
+    {1587201986, 204000},
+    {1587813470, 206000},
+    {1588431854, 208000},
+    {1589057972, 210000},
+    {1589669885, 212000},
+    {1590276257, 214000},
+    {1590876865, 216000},
+    {1591475760, 218000},
+    {1592067104, 220000},
+    {1592681388, 222000},
+    {1593290342, 224000},
+    {1593896282, 226000},
+    {1594489197, 228000},
+    {1595105073, 230000},
+    {1595706859, 232000},
+    {1596303095, 234000},
+    {1596887281, 236000},
+    {1597498842, 238000},
+    {1598099448, 240000},
+    {1598705242, 242000},
+    {1599308983, 244000},
+    {1599914532, 246000},
+    {1600507836, 248000},
+    {1601109430, 250000},
+    {1601710572, 252000},
+    {1602305645, 254000},
+    {1602898089, 256000},
+    {1603501419, 258000},
+    {1604102323, 260000},
+    {1604694785, 262000},
+    {1605289509, 264000},
+    {1605889778, 266000},
+    {1606493643, 268000},
+    {1607083718, 270000},
+    {1607693879, 272000},
+    {1608288061, 274000},
+    {1608890342, 276000},
+    {1609479282, 278000},
+    {1610078383, 280000},
+    {1610678028, 282000},
+    {1611276041, 284000},
+    {1611874904, 286000},
+    {1612479368, 288000},
+    {1613076479, 290000},
+    {1613679332, 292000},
+    {1614269634, 294000},
+    {1614866506, 296000},
+    {1615467310, 298000},
+    {1616071879, 300000},
+    {1616668758, 302000},
+    {1617268180, 304000},
+    {1617878649, 306000},
+    {1618490259, 308000},
+    {1619069699, 310000},
+    {1619658329, 312000},
+    {1620256511, 314000},
+    {1620854930, 316000},
+    {1621453789, 318000},
+    {1622047235, 320000},
+    {1622644711, 322000},
+    {1623238613, 324000},
+    {1623834283, 326000},
+    {1624440270, 328000},
+    {1625034084, 330000},
+    {1625411381, 332000},
+    {1626061496, 334000},
+    {1626634887, 336000},
+    {1627198199, 338000},
+    {1627767827, 340000},
+    {1628363606, 342000},
+    {1628975947, 344000},
+    {1629547598, 346000},
+    {1630145454, 348000},
+    {1630719697, 350000},
+    {1631356160, 352000},
+    {1631986172, 354000},
+    {1632569490, 356000},
+    {1633170324, 358000},
+    {1633775768, 360000},
+    {1634383491, 362000},
+    {1635002324, 364000},
+    {1635617950, 366000},
+    {1636210188, 368000},
+    {1636817670, 370000},
+    {1637418065, 372000},
+    {1638024048, 374000},
+    {1638643331, 376000},
+    {1639235224, 378000},
+    {1639896738, 380000},
+    {1640494376, 382000},
+    {1641106951, 384000},
+    {1641676722, 386000},
+    {1642298995, 388000},
+    {1643009648, 390000},
+    {1643571105, 392000},
+    {1644187183, 394000},
+    {1644747412, 396000},
+    {1645350272, 398000},
+    {1645949729, 400000},
+    {1646543179, 402000},
+    {1647168997, 404000},
+    {1647725920, 406000},
+    {1648354637, 408000},
+    {1648978293, 410000},
+    {1649555694, 412000},
+    {1650212215, 414000},
+    {1650774962, 416000},
+    {1651412717, 418000},
+    {1651999579, 420000}
+};
+
+
+unsigned int dateToRestoreHeight(const time_t _t) {
+    auto t = static_cast<long int>(_t);
+    unsigned int prev = 0;
+
+    for (auto const&item: heightLookup) {
+        auto epoch = item.first;
+        auto height = item.second;
+
+        if(t <= epoch) {
+            if(prev == 0) return 1;
+            return heightLookup[prev];
+        }
+
+        prev = item.first;
+    }
+
+    // height not found in the lookup table, calculate
+    auto begin = heightLookup.begin();
+    unsigned first_epoch = begin->first;
+    unsigned first_height = begin->second;
+
+    unsigned last_epoch = prev;
+    unsigned last_height = heightLookup[prev];
+
+    const unsigned secs_per_day = 86400;
+    unsigned days = (last_epoch - first_epoch) / secs_per_day;
+    unsigned blocks_per_day = last_height / days;
+    blocks_per_day = blocks_per_day - 10; // fault tolerance
+
+    unsigned days_delta = (t - last_epoch) / secs_per_day;
+    if(days_delta == 0) return last_height;
+
+    unsigned blocks_delta = days_delta * blocks_per_day;
+    unsigned calculated_height = last_height + blocks_delta;
+    return calculated_height;
+}
--- a/src/main.cpp
+++ b/src/main.cpp
@ -63,6 +63,7 @@ void print_seed(const wownero_seed& seed, const char* coin, bool phrase) {
 	auto created_on = seed.date();
 	std::tm tm = *std::localtime(&created_on);
 	std::cout << "- created on or after: " << std::put_time(&tm, "%d/%b/%Y") << std::endl;
+    std::cout << "- blockheight: " << seed.blockheight() << std::endl;
 }

 int main(int argc, const char* argv[]) {
--- a/src/wownero_seed.cpp
+++ b/src/wownero_seed.cpp
@ -8,6 +8,7 @@
 #include <wownero_seed/wordlist.hpp>
 #include <wownero_seed/gf_poly.hpp>
 #include <wownero_seed/reed_solomon_code.hpp>
+#include <wownero_seed/heights.hpp>
 #include "argon2/argon2.h"
 #include "argon2/blake2/blake2-impl.h"
 #include "pbkdf2.h"
@ -222,6 +223,10 @@ wownero_seed::wownero_seed(const std::string& phrase, const std::string& coin) {
 	pbkdf2_hmac_sha256(seed_.data(), seed_.size(), salt, sizeof(salt), pbkdf2_iterations, key_.data(), key_.size());
 }

+unsigned wownero_seed::blockheight() const {
+    return dateToRestoreHeight(this->date());
+}
+
 std::ostream& operator<<(std::ostream& os, const wownero_seed& seed) {
 	for (int i = 0; i <= seed.message_.degree(); ++i) {
 		if (i > 0) {