homepage: live halving countdown section when very close (98%+)

routes/snippetRouter.js

@@ -84,6 +84,59 @@ router.get("/next-block", asyncHandler(async (req, res, next) => {
 	res.render("snippets/index-next-block");
 }));
 
+router.get("/index-halving-countdown", asyncHandler(async (req, res, next) => {
+	try {
+		const getblockchaininfo = await utils.timePromise("snippet.index-halving-countdown.getBlockchainInfo", async () => {
+			return await coreApi.getBlockchainInfo();
+		});
+
+		let promises = [];
+
+		res.locals.getblockchaininfo = getblockchaininfo;
+		res.locals.difficultyPeriod = parseInt(Math.floor(getblockchaininfo.blocks / coinConfig.difficultyAdjustmentBlockCount));
+
+		let blockHeights = [];
+		if (getblockchaininfo.blocks) {
+			for (let i = 0; i < 1; i++) {
+				blockHeights.push(getblockchaininfo.blocks - i);
+			}
+		} else if (global.activeBlockchain == "regtest") {
+			// hack: default regtest node returns getblockchaininfo.blocks=0, despite
+			// having a genesis block; hack this to display the genesis block
+			blockHeights.push(0);
+		}
+
+		promises.push(utils.timePromise("snippet.index-halving-countdown.getBlockHeaderByHeight", async () => {
+			let h = coinConfig.difficultyAdjustmentBlockCount * res.locals.difficultyPeriod;
+			res.locals.difficultyPeriodFirstBlockHeader = await coreApi.getBlockHeaderByHeight(h);
+		}));
+
+		promises.push(utils.timePromise("snippet.index-halving-countdown.getBlocksByHeight", async () => {
+			const latestBlocks = await coreApi.getBlocksByHeight(blockHeights);
+			
+			res.locals.latestBlocks = latestBlocks;
+		}));
+
+		await utils.awaitPromises(promises);
+
+
+		let nextHalvingData = utils.nextHalvingEstimates(res.locals.difficultyPeriodFirstBlockHeader, res.locals.latestBlocks[0]);
+
+		res.locals.nextHalvingData = nextHalvingData;
+
+		await utils.timePromise("snippet.index-halving-countdown.render", async () => {
+			res.render("snippets/index-halving-countdown");
+		});
+
+	} catch (e) {
+		res.locals.pageErrors.push(utils.logError("390wrgehburfuge", e));
+
+		await utils.timePromise("snippet.index-halving-countdown.render", async () => {
+			res.render("snippets/index-halving-countdown");
+		});
+	}
+}));
+
 router.get("/utxo-set", asyncHandler(async (req, res, next) => {
 	const promises = [];
 

views/includes/index-network-summary.pug

@@ -5,7 +5,37 @@ if (exchangeRates || networkVolume)
 - var utxoCalculatingDesc = "At startup the app pulls a summary of the UTXO set. Until this summary is retrieved this data can't be displayed. Wait for the summary request to your node to return, then refresh this page.";
 
 
+- let halvingSoon = false;
+- let halvingVerySoon = false;
+- let halvingProgressPercent = 0;
 
+if (nextHalvingData)
+	- halvingProgressPercent = new Decimal(100).minus(new Decimal(nextHalvingData.blocksUntilNextHalving).dividedBy(nextHalvingData.halvingBlockInterval).times(100));
+
+	if (halvingProgressPercent > 65)
+		- halvingSoon = true;
+
+	if (halvingProgressPercent > 98)
+		-halvingVerySoon = true;
+
+
+if (halvingVerySoon)
+	#index-halving-countdown-wrapper
+		.d-flex.justify-content-start
+			.text-success
+				+sectionTitle("Halving Countdown 👀")
+
+			.ms-2
+				span.spinner-border.spinner-border-sm
+		
+		
+		.mb-section
+			.card.mb-section.shadow-sm.border-2.border-success
+				.card-body
+					div#index-halving-countdown
+						.text-center.text-reset
+							.mt-2
+							.spinner-border.spinner-border-sm
 
 if (exchangeRates)
 	+contentSection("Market")
@@ -80,13 +110,7 @@ if (exchangeRates)
 
 
 +contentSection
-	- let halvingShown = false;
-	- let halvingProgressPercent = new Decimal(100).minus(new Decimal(nextHalvingData.blocksUntilNextHalving).dividedBy(nextHalvingData.halvingBlockInterval).times(100));
-
-	if (nextHalvingData && halvingProgressPercent > 65)
-		- halvingShown = true;
-
-	+summaryRow(2 + (halvingShown ? 1 : 0) + (hashrate7d ? 1 : 0) + (chainTxStats && chainTxStats[7 * targetBlocksPerDay] ? 1 : 0) + (difficultyAdjustmentData ? 1 : 0))
+	+summaryRow(2 + (halvingSoon ? 1 : 0) + (hashrate7d ? 1 : 0) + (chainTxStats && chainTxStats[7 * targetBlocksPerDay] ? 1 : 0) + (difficultyAdjustmentData ? 1 : 0))
 		if (hashrate7d)
 			+summaryItem("7d Hashrate", "The average hashrate of the global mining network over the last 7 days. A comparison to the 30-day average is included to help gauge the rate of change.")
 				- var hashrate7dayData = utils.formatLargeNumber(hashrate7d, 1);
@@ -110,7 +134,7 @@ if (exchangeRates)
 
 						| )
 
-		if (halvingShown)
+		if (halvingSoon)
 			if (false)
 				pre #{JSON.stringify(nextHalvingData)}
 			

views/includes/shared-mixins.pug

@@ -618,7 +618,9 @@ mixin timestamp(timestamp, options={includeAgo:true, agoOptions:{}})
 
 
 
-mixin timeAgo(timeAgoTime, options={oneElement:false, agoText:true})
+mixin timeAgo(timeAgoTime, options={oneElement:false, agoText:true, showPlus:true})
+	- let showPlus = "showPlus" in options ? options.showPlus : true;
+
 	- let oneElement = false;
 	if (options && "oneElement" in options)
 		- oneElement = options.oneElement;
@@ -640,7 +642,7 @@ mixin timeAgo(timeAgoTime, options={oneElement:false, agoText:true})
 		- timeAgo = moment.duration(moment.utc(new Date(parseInt(timeAgoTime) * 1000)).diff(moment.utc(new Date())));
 
 
-	if (future)
+	if (future && showPlus)
 		span +
 
 		

views/index.pug

@@ -127,10 +127,44 @@ block content
 
 block endOfBody
 	script.
+		var audio = new Audio('./audio/609335__kenneth_cooney__levelup.wav');
+		var tipInfo = null;
+
+		function refreshHalvingCountdownUI() {
+			$.get("./snippet/index-halving-countdown", function(data) {
+				$("#index-halving-countdown").html(data);
+				enableTooltipsAndPopovers();
+			});
+		}
+
+		function checkHalvingCountdown() {
+			$.get("./api/blocks/tip", function(data) {
+				if (data.height > tipInfo.height) {
+					tipInfo = data;
+
+					audio.play();
+
+					refreshHalvingCountdownUI();
+				}
+
+				console.log(tipInfo);
+			});
+		}
+
 		$(document).ready(function() {
 			$.get("./snippet/next-block", function(data) {
 				$("#index-next-block").html(data);
 				enableTooltipsAndPopovers();
 			});
+
+			$.get("./api/blocks/tip", function(data) {
+				tipInfo = data;
+			});
+
+			if ($("#index-halving-countdown-wrapper").length) {
+				refreshHalvingCountdownUI();
+
+				setInterval(checkHalvingCountdown, 3000);
+			}
 		});
 		

views/snippets/index-halving-countdown.pug

@@ -0,0 +1,26 @@
+include ../includes/shared-mixins.pug
+
+if (nextHalvingData.nextHalvingIndex > -1)
+	+summaryRow(5)
+		+summaryItem("Blocks Remaining")
+			| #{nextHalvingData.blocksUntilNextHalving.toLocaleString()}
+
+		+summaryItem("Time Remaining", "The estimated time until halving, based on the number of blocks remaining and the current mining rate (up until the next difficulty adjustment).")
+			+timeAgo(nextHalvingData.nextHalvingDate.getTime() / 1000, {showPlus:false})
+
+		+summaryItem("Estimated Date", "The date of halving, estimated based on the number of blocks remaining and the current mining rate (up until the next difficulty adjustment).")
+			+timestamp(nextHalvingData.nextHalvingDate.getTime() / 1000, {includeAgo:false})
+
+		+summaryItem("Block Height", "The block height at which the new block subsidy will begin.")
+			| #{nextHalvingData.nextHalvingBlock.toLocaleString()}
+
+		+summaryItem("New Subsidy", "The new supply that will be created (and rewarded to the winning miner) for each new block during the next halving's era.")
+			- let subsidy = coinConfig.blockRewardFunction(nextHalvingData.nextHalvingBlock, global.activeBlockchain);
+			+valueDisplay(subsidy)
+		
+	- let progressPercent = new Decimal(nextHalvingData.halvingBlockInterval).minus(nextHalvingData.blocksUntilNextHalving).dividedBy(nextHalvingData.halvingBlockInterval).times(100);
+	.progress.mt-5(role="progressbar", aria-label="Next halving progress", aria-valuenow=progressPercent.toDP(0), aria-valuemin="0", aria-valuemax="100")
+		.progress-bar(style=`width: ${progressPercent.toDP(0)}%`)
+			| #{progressPercent.toDP(4)}%
+
+