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Created May 31, 2017 17:45
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Created using browser-solidity: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://ethereum.github.io/browser-solidity/#version=soljson-v0.4.11+commit.68ef5810.js&optimize=undefined&gist=
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pragma solidity ^0.4.11;
contract BikramSamvat{
/*
* Unix timestamp to Bikram Samvat (Date Time Library)
* @NepalBitcoin
*/
address Bikram;
enum DaysInWeek{SUN,MON,TUE,WED,THU,FRI,SAT}
struct MITI {
uint16 YY;
uint8 MM;
uint8 DD;
uint8 hh;
uint8 mm;
uint8 ss;
uint8 day;
uint64 timestamp;
}
struct BSYears{
bytes16 _hash;
uint32 _leapCount;
int8[12] _months;
uint16 _daysIn6Months;
bool _isLeap;
}
/* struct CORE {
int8[12] _months;
uint16 _daysIn6Months;
bool _isLeap;
}*/
mapping(uint16 => BSYears) public BS;
//mapping (bytes16 => CORE) public DBCore;
uint64 subEpoch = 5 years;
uint64 NST = 5 hours + 45 minutes;
uint64 epochBalance = 103 days - NST;
uint16 MaxBSYear = 2027;
function BikramSamvat(){
Bikram = msg.sender;
}
function toTimestamp (uint16 _YY, uint8 _MM, uint8 _DD, uint8 _hh, uint8 _mm, uint8 _ss) private constant checkBS2TS(_YY,_MM,_DD,_hh,_mm,_ss) returns (MITI miti){
miti.timestamp = epochBalance;
miti.timestamp += 366 days * BS[_YY]._leapCount;
miti.timestamp += 365 days * (_YY - 2027 - BS[_YY]._leapCount);
miti.MM = 1;
if(_MM > 6){
miti.MM = 7;
miti.timestamp += 1 days * getDaysIn6Months(_YY);
}
while(miti.MM < _MM){
miti.timestamp += 1 days * getDaysInMonth(_YY, miti.MM);
miti.MM++;
}
miti.YY= _YY;
miti.DD= _DD;
miti.timestamp += 1 days * (_DD -1);
miti.timestamp += uint64(_hh) * 1 hours;
miti.timestamp += uint64(_mm) * 1 minutes;
miti.timestamp += _ss;
miti.day = getWeekDay(miti.timestamp);
miti.hh = _hh;
miti.mm = _mm;
miti.ss = _ss;
}
modifier checkBS2TS(uint16 _YY, uint8 _MM, uint8 _DD, uint8 _hh, uint8 _mm, uint8 _ss){
if(_YY < 2027 || _YY > MaxBSYear) throw;
if(_MM < 1 || _MM > 12) throw;
if(_DD < 1 || _DD > getDaysInMonth(_YY, _MM)) throw;
if(_hh > 23) throw;
if(_mm > 59) throw;
if(_ss > 59) throw;
_;
}
function BS2TS(uint16 _YY, uint8 _MM, uint8 _DD, uint8 _hh, uint8 _mm, uint8 _ss) public constant returns (uint16 YY, uint8 MM, uint8 DD, uint8 hh, uint8 mm, uint8 ss, uint8 day, uint64 timestamp){
MITI memory miti = toTimestamp(_YY,_MM,_DD,_hh,_mm,_ss);
return (miti.YY, miti.MM, miti.DD, miti.hh,miti.mm,miti.ss,miti.day,miti.timestamp);
}
function TS2BS(uint64 _timestamp) public constant returns (uint16 YY, uint8 MM, uint8 DD, uint8 hh, uint8 mm, uint8 ss, uint8 day, uint64 timestamp){
MITI memory miti = toBikramSamvat(_timestamp);
return (miti.YY, miti.MM, miti.DD, miti.hh,miti.mm,miti.ss,miti.day,miti.timestamp);
}
function toBikramSamvat(uint64 timestamp) private constant returns(MITI miti){
miti.timestamp = timestamp;
miti = TSYearCounter(miti);
miti = TSMonthCounter(miti);
miti.DD = 1 + uint8(miti.timestamp / 1 days);
miti.timestamp = miti.timestamp % 1 days;
miti.hh = getHour(timestamp);//uint8(miti.timestamp / 1 hours);
miti.mm = getMinute(timestamp); //uint8(miti.timestamp / 1 minutes);
miti.ss = getSecond(timestamp);//uint8(miti.timestamp);
miti.timestamp = timestamp;
miti.day = getWeekDay(timestamp);
return miti;
}
function getHour(uint64 _timestamp) constant returns (uint8) {
return uint8(((_timestamp - epochBalance) / 1 minutes / 1 minutes) % 24);
}
function getMinute(uint64 _timestamp) constant returns (uint8) {
return uint8(((_timestamp - epochBalance) / 1 minutes) % 1 minutes);
}
function getSecond(uint64 _timestamp) constant returns (uint8) {
return uint8((_timestamp - epochBalance) % 1 minutes);
}
function getWeekDay(uint64 _timestamp) returns (uint8){
return uint8(((_timestamp - epochBalance) / 1 days + 2) % 7);
}
function TSYearCounter(MITI miti) internal constant returns(MITI){
miti.YY = 2027;
miti.timestamp -= epochBalance;
miti.YY += uint16(5 * miti.timestamp / subEpoch);
miti.timestamp = miti.timestamp % subEpoch;
miti.timestamp -= 1 days * BS[miti.YY]._leapCount;
while(miti.timestamp > 364 days){
if(!BS[miti.YY]._isLeap){
miti.timestamp -= 365 days;
}else{
miti.timestamp -= 366 days;
}
miti.YY++;
}
return miti;
}
function TSMonthCounter(MITI miti) internal constant returns (MITI){
miti.MM = 1;
uint16 daysIn6Months = getDaysIn6Months(miti.YY);
if((miti.timestamp/1 days) > daysIn6Months){
miti.MM = 7;
miti.timestamp -= (daysIn6Months * 1 days);
}
uint8 daysInMonth;
for(miti.MM; miti.MM < 12; miti.MM++){
daysInMonth = getDaysInMonth(miti.YY,miti.MM);
if(miti.timestamp < (daysInMonth * 1 days))
break;
miti.timestamp -= (daysInMonth * 1 days);
}
return miti;
}
function setBS(uint16 _YY, int8[12] _months) public onlyBikram() {
//bytes16 hash = bytes16(sha3(_months));
if(BS[_YY]._daysIn6Months == 0){
setBSCore(_YY, _months);
}
if(!isLeapYear(_YY)){
BS[_YY + 1]._leapCount = BS[_YY]._leapCount;
}else{
BS[_YY + 1]._leapCount = BS[_YY]._leapCount + 1;
}
//BS[_YY]._hash = hash;
}
function setBSCore(uint16 _YY, int8[12] _months) internal constant{
int16 countDays;
uint16 daysIn6Months;
for(uint8 i = 0; i < 12;i++){
if(_months[i] < -1 || _months[i] > 2){
throw;
}
countDays += _months[i];
if(i<6) {
daysIn6Months += uint16(int8(30)+_months[i]);
}
}
if(countDays == 5){
BS[_YY]._isLeap = false;
}else if(countDays == 6){
BS[_YY]._isLeap = true;
}else {
throw;
}
BS[_YY]._daysIn6Months = daysIn6Months;
BS[_YY]._months = _months;
}
function TSCorrection(uint64 _timestamp) internal constant returns (uint64){
return (((_timestamp) / 1 days) * 1 days);
}
function getDaysInMonth(uint16 _YY, uint8 _MM) internal constant returns(uint8){
return uint8(int8(30) + BS[_YY]._months[_MM - 1]);
}
function getDaysIn6Months(uint16 _YY) internal constant returns(uint16){
return BS[_YY]._daysIn6Months;
}
function isLeapYear(uint16 _YY) internal constant returns(bool){
return BS[_YY]._isLeap;
}
modifier checkTimestamp(uint64 timestamp){
//if(timestamp < 8878500 || timestamp > ){
// throw;
//}
_;
}
modifier onlyBikram(){
if(msg.sender != Bikram)
throw;
_;
}
function DBUpdate();
function(){
throw;
}
}
contract XX is BikramSamvat {
enum dbStage{zero,one,two,three,four,five,six,seven,eight,nine,ten,eleven,twelve,thirteen}
dbStage stageNow;
modifier dbStaging(){
if(stageNow > dbStage.twelve)
throw;
_;
}
function DBUpdate() onlyBikram() dbStaging(){
if(stageNow == dbStage.zero){
EpochUpdate1();
stageNow = dbStage.one;
}else if(stageNow == dbStage.one){
EpochUpdate2();
stageNow = dbStage.two;
}else if(stageNow == dbStage.two){
EpochUpdate3();
stageNow = dbStage.three;
}else if(stageNow == dbStage.three){
EpochUpdate4();
stageNow = dbStage.four;
}else if(stageNow == dbStage.four){
EpochUpdate5();
stageNow = dbStage.five;
}else if(stageNow == dbStage.five){
EpochUpdate6();
stageNow = dbStage.six;
}else if(stageNow == dbStage.six){
EpochUpdate7();
stageNow = dbStage.seven;
}else if(stageNow == dbStage.seven){
EpochUpdate8();
stageNow = dbStage.eight;
}else if(stageNow == dbStage.eight){
EpochUpdate9();
stageNow = dbStage.nine;
}else if(stageNow == dbStage.nine){
EpochUpdate10();
stageNow = dbStage.ten;
}else if(stageNow == dbStage.ten){
EpochUpdate11();
stageNow = dbStage.eleven;
}else if(stageNow == dbStage.eleven){
EpochUpdate12();
stageNow = dbStage.twelve;
}else if(stageNow == dbStage.eleven){
EpochUpdate13();
stageNow = dbStage.thirteen;
}
}
function EpochUpdate1() internal {
setBS(2027,[int8(0),2,1,2,1,0,0,0,-1,0,-1,1]);
setBS(2028,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2029,[int8(1),1,2,1,2,0,0,-1,0,-1,0,0]);
}
function EpochUpdate2() internal {
setBS(2030,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2031,[int8(0),2,1,2,1,0,0,0,-1,0,-1,1]);
setBS(2032,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2033,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
}
function EpochUpdate3() internal {
setBS(2034,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2035,[int8(0),2,1,2,1,1,-1,0,0,-1,-1,1]);
setBS(2036,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2037,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
}
function EpochUpdate4() internal {
setBS(2038,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2039,[int8(1),1,1,2,1,1,-1,0,0,-1,0,0]);
setBS(2040,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2041,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
}
function EpochUpdate5() internal {
setBS(2042,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2043,[int8(1),1,1,2,1,1,-1,0,0,-1,0,0]);
setBS(2044,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2045,[int8(1),2,1,2,1,0,0,-1,0,-1,0,0]);
}
function EpochUpdate6() internal {
setBS(2046,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2047,[int8(1),1,1,2,1,1,0,-1,0,-1,0,0]);
setBS(2048,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2049,[int8(1),2,1,2,1,0,0,0,-1,-1,0,0]);
setBS(2050,[int8(1),2,1,2,1,0,0,0,-1,0,-1,1]);
}
function EpochUpdate7() internal {
setBS(2051,[int8(1),1,1,2,1,1,0,-1,0,-1,0,0]);
setBS(2052,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2053,[int8(1),2,1,2,1,0,0,0,-1,-1,0,0]);
setBS(2054,[int8(1),2,1,2,1,0,0,0,-1,0,-1,1]);
setBS(2055,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
}
function EpochUpdate8() internal {
setBS(2056,[int8(1),1,2,1,2,0,0,-1,0,-1,0,0]);
setBS(2057,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2058,[int8(0),2,1,2,1,0,0,0,-1,0,-1,1]);
setBS(2059,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2060,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
}
function EpochUpdate9() internal {
setBS(2061,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2062,[int8(0),2,1,2,1,1,-1,0,-1,0,-1,1]);
setBS(2063,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2064,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
setBS(2065,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
}
function EpochUpdate10() internal {
setBS(2066,[int8(1),1,1,2,1,1,-1,0,0,-1,-1,1]);
setBS(2067,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2068,[int8(1),1,2,2,1,0,0,-1,0,-1,0,0]);
setBS(2069,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2070,[int8(1),1,1,2,1,1,-1,0,0,-1,0,0]);
}
function EpochUpdate11() internal {
setBS(2071,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2072,[int8(1),2,1,2,1,0,0,-1,0,-1,0,0]);
setBS(2073,[int8(1),2,1,2,1,0,0,0,-1,-1,0,1]);
setBS(2074,[int8(1),1,1,2,1,1,0,-1,0,-1,0,0]);
setBS(2075,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2076,[int8(1),2,1,2,1,0,0,0,-1,-1,0,0]);
setBS(2077,[int8(1),2,1,2,1,0,0,0,-1,0,-1,1]);
}
function EpochUpdate12() internal {
setBS(2078,[int8(1),1,1,2,1,1,0,-1,0,-1,0,0]);
setBS(2079,[int8(1),1,2,1,1,1,0,-1,0,-1,0,0]);
setBS(2080,[int8(1),2,1,2,1,0,0,0,-1,-1,0,0]);
setBS(2081,[int8(1),1,2,2,1,0,0,0,-1,0,0,0]);
setBS(2082,[int8(0),2,1,2,1,0,0,0,-1,0,0,0]);
setBS(2083,[int8(1),1,2,1,1,0,0,0,-1,0,0,0]);
}
function EpochUpdate13() internal {
setBS(2084,[int8(1),1,2,1,1,0,0,0,-1,0,0,0]);
setBS(2085,[int8(1),2,1,2,0,1,0,0,-1,0,0,0]);
setBS(2086,[int8(0),2,1,2,1,0,0,0,-1,0,0,0]);
setBS(2087,[int8(1),1,2,1,1,1,0,0,-1,0,0,0]);
setBS(2088,[int8(0),1,2,2,0,1,0,0,-1,0,0,0]);
setBS(2089,[int8(0),2,1,2,1,0,0,0,-1,0,0,0]);
setBS(2090,[int8(0),2,1,2,1,0,0,0,-1,0,0,0]);
}
}
@prashant-shahi
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heyo..
How much back in time, this calendar seem to work?? 🤔

@nepalbitcoin
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Unix timestamp started in 1970, this dapp inits in Baishak 1, 2027 BS, i.e. Jan 1, 1970 + 103 days.

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