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Merge pull request #142 from cake-tech/CAKE-168-blockheight-calculation-by-date

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Cake 168 blockheight calculation by date
This commit is contained in:
M 2020-11-12 22:20:46 +02:00
commit 1a7c2d4d8a
2 changed files with 19 additions and 24 deletions
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41
lib/monero/get_height_by_date.dart
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@ -82,37 +82,32 @@ final dates = {
"2020-8": 2153983,
"2020-9": 2176466,
"2020-10": 2198453,
"2020-11": 2221803
"2020-11": 2220000
};
final heightCoefficient = 0.7;
int getHeigthByDate({DateTime date}) {
final raw = '${date.year}' + '-' + '${date.month}';
var endHeight = dates[raw] ?? 0;
int preLastYear = date.year;
int preLastMonth = date.month - 1;
final lastHeight = dates.values.last;
int startHeight;
int endHeight;
int height;
if (endHeight <= 0) {
if ((dates[raw] == null)||(dates[raw] == lastHeight)) {
startHeight = dates.values.toList()[dates.length - 2];
endHeight = dates.values.toList()[dates.length - 1];
final preLastDate =
dateFormat.parse(dates.keys.elementAt(dates.keys.length - 2));
preLastYear = preLastDate.year;
preLastMonth = preLastDate.month;
final heightPerDay = (endHeight - startHeight) / 31;
final daysHeight = (heightCoefficient * (date.day - 1) * heightPerDay).round();
height = endHeight + daysHeight;
} else {
preLastYear = date.year;
preLastMonth = date.month - 1;
startHeight = dates[raw];
final index = dates.values.toList().indexOf(startHeight);
endHeight = dates.values.toList()[index + 1];
final heightPerDay = ((endHeight - startHeight) / 31).round();
final daysHeight = (date.day - 1) * heightPerDay;
height = startHeight + daysHeight - heightPerDay;
}
if (preLastMonth <= 0) {
preLastMonth = 12;
preLastYear -= 1;
}
final startRaw = '$preLastYear' + '-' + '$preLastMonth';
final startHeight = dates[startRaw];
final diff = endHeight - startHeight;
final heightPerDay = diff / 30;
final daysHeight = date.day * heightPerDay.round();
final height = endHeight + daysHeight;
return height;
}

2
lib/src/widgets/blockchain_height_widget.dart
View file

@ -92,7 +92,7 @@ class BlockchainHeightState extends State<BlockchainHeightWidget> {
final date = await getDate(
context: context,
initialDate: now.subtract(Duration(days: 1)),
firstDate: DateTime(2014, DateTime.april),
firstDate: DateTime(2014, DateTime.may),
lastDate: now);
if (date != null) {