add halving to price carousel

components/block-height.js

@@ -2,13 +2,17 @@ import { createContext, useContext, useMemo } from 'react'
 import { useQuery } from '@apollo/client'
 import { NORMAL_POLL_INTERVAL, SSR } from '@/lib/constants'
 import { BLOCK_HEIGHT } from '@/fragments/blockHeight'
+import { datePivot } from '@/lib/time'
 
 export const BlockHeightContext = createContext({
-  height: 0
+  height: 0,
+  halving: null
 })
 
 export const useBlockHeight = () => useContext(BlockHeightContext)
 
+const HALVING_INTERVAL = 210000
+
 export const BlockHeightProvider = ({ blockHeight, children }) => {
   const { data } = useQuery(BLOCK_HEIGHT, {
     ...(SSR
@@ -18,9 +22,23 @@ export const BlockHeightProvider = ({ blockHeight, children }) => {
           nextFetchPolicy: 'cache-and-network'
         })
   })
-  const value = useMemo(() => ({
-    height: data?.blockHeight ?? blockHeight ?? 0
-  }), [data?.blockHeight, blockHeight])
+  const value = useMemo(() => {
+    if (!data?.blockHeight) {
+      return {
+        height: blockHeight ?? 0,
+        halving: null
+      }
+    }
+
+    const remainingBlocks = HALVING_INTERVAL - (data.blockHeight % HALVING_INTERVAL)
+    const minutesUntilHalving = remainingBlocks * 10
+    const halving = datePivot(new Date(), { minutes: minutesUntilHalving })
+
+    return {
+      height: data.blockHeight,
+      halving
+    }
+  }, [data?.blockHeight, blockHeight])
   return (
     <BlockHeightContext.Provider value={value}>
       {children}

components/countdown.js

@@ -1,18 +1,53 @@
 import Countdown from 'react-countdown'
 
-export default function SimpleCountdown ({ className, onComplete, date }) {
+export default function SimpleCountdown (props) {
   return (
-    <span className={className}>
-      <Countdown
-        date={date}
-        renderer={props => <span className='text-monospace' suppressHydrationWarning> {props.formatted.minutes}:{props.formatted.seconds}</span>}
-        onComplete={onComplete}
+    <CountdownShared
+      {...props} formatter={props => {
+        return (
+          <>
+            {props.formatted.minutes}:{props.formatted.seconds}
+          </>
+        )
+      }}
     />
-    </span>
   )
 }
 
-export function LongCountdown ({ className, onComplete, date }) {
+export function LongCountdown (props) {
+  return (
+    <CountdownShared
+      {...props} formatter={props => {
+        return (
+          <>
+            {props.formatted.days && `${props.formatted.days} days `}
+            {props.formatted.hours && `${props.formatted.hours} hours `}
+            {props.formatted.minutes && `${props.formatted.minutes} minutes `}
+            {props.formatted.seconds && `${props.formatted.seconds} seconds `}
+          </>
+        )
+      }}
+    />
+  )
+}
+
+export function CompactLongCountdown (props) {
+  return (
+    <CountdownShared
+      {...props} formatter={props => {
+        return (
+          <>
+            {props.formatted.days
+              ? ` ${props.formatted.days}d ${props.formatted.hours}h ${props.formatted.minutes}m ${props.formatted.seconds}s`
+              : ` ${props.formatted.hours}:${props.formatted.minutes}:${props.formatted.seconds}`}
+          </>
+        )
+      }}
+    />
+  )
+}
+
+function CountdownShared ({ className, onComplete, date, formatter }) {
   return (
     <span className={className}>
       <Countdown
@@ -20,9 +55,7 @@ export function LongCountdown ({ className, onComplete, date }) {
         renderer={props => {
           return (
             <span suppressHydrationWarning>
-              {props.formatted.days && `${props.formatted.days} days `}
-              {props.formatted.minutes && `${props.formatted.minutes} minutes `}
-              {props.formatted.seconds && `${props.formatted.seconds} seconds `}
+              {formatter(props)}
             </span>
           )
         }}

components/price.js

@@ -7,6 +7,7 @@ import { CURRENCY_SYMBOLS } from '@/lib/currency'
 import { NORMAL_POLL_INTERVAL, SSR } from '@/lib/constants'
 import { useBlockHeight } from './block-height'
 import { useChainFee } from './chain-fee'
+import { CompactLongCountdown } from './countdown'
 
 export const PriceContext = React.createContext({
   price: null,
@@ -50,11 +51,9 @@ export default function Price ({ className }) {
   }, [])
 
   const { price, fiatSymbol } = usePrice()
-  const { height: blockHeight } = useBlockHeight()
+  const { height: blockHeight, halving } = useBlockHeight()
   const { fee: chainFee } = useChainFee()
 
-  if (!price || price < 0 || blockHeight <= 0 || chainFee <= 0) return null
-
   // Options: yep, 1btc, blockHeight, undefined
   // yep -> 1btc -> blockHeight -> chainFee -> undefined -> yep
   const handleClick = () => {
@@ -68,6 +67,9 @@ export default function Price ({ className }) {
       window.localStorage.setItem('asSats', 'chainFee')
       setAsSats('chainFee')
     } else if (asSats === 'chainFee') {
+      window.localStorage.setItem('asSats', 'halving')
+      setAsSats('halving')
+    } else if (asSats === 'halving') {
       window.localStorage.removeItem('asSats')
       setAsSats('fiat')
     } else {
@@ -79,6 +81,7 @@ export default function Price ({ className }) {
   const compClassName = (className || '') + ' text-reset pointer'
 
   if (asSats === 'yep') {
+    if (!price || price < 0) return null
     return (
       <div className={compClassName} onClick={handleClick} variant='link'>
         {fixedDecimal(100000000 / price, 0) + ` sats/${fiatSymbol}`}
@@ -95,6 +98,7 @@ export default function Price ({ className }) {
   }
 
   if (asSats === 'blockHeight') {
+    if (blockHeight <= 0) return null
     return (
       <div className={compClassName} onClick={handleClick} variant='link'>
         {blockHeight}
@@ -102,7 +106,17 @@ export default function Price ({ className }) {
     )
   }
 
+  if (asSats === 'halving') {
+    if (!halving) return null
+    return (
+      <div className={compClassName} onClick={handleClick} variant='link'>
+        <CompactLongCountdown date={halving} />
+      </div>
+    )
+  }
+
   if (asSats === 'chainFee') {
+    if (chainFee <= 0) return null
     return (
       <div className={compClassName} onClick={handleClick} variant='link'>
         {chainFee} sat/vB
@@ -111,6 +125,7 @@ export default function Price ({ className }) {
   }
 
   if (asSats === 'fiat') {
+    if (!price || price < 0) return null
     return (
       <div className={compClassName} onClick={handleClick} variant='link'>
         {fiatSymbol + fixedDecimal(price, 0)}

pages/rewards/index.js

@@ -7,7 +7,6 @@ import Layout from '@/components/layout'
 import { useMutation, useQuery } from '@apollo/client'
 import Link from 'next/link'
 import { amountSchema } from '@/lib/validate'
-import Countdown from 'react-countdown'
 import { numWithUnits } from '@/lib/format'
 import PageLoading from '@/components/page-loading'
 import { useShowModal } from '@/components/modal'
@@ -21,6 +20,7 @@ import { proportions } from '@/lib/madness'
 import { useData } from '@/components/use-data'
 import { GrowthPieChartSkeleton } from '@/components/charts-skeletons'
 import { useMemo } from 'react'
+import { CompactLongCountdown } from '@/components/countdown'
 
 const GrowthPieChart = dynamic(() => import('@/components/charts').then(mod => mod.GrowthPieChart), {
   loading: () => <GrowthPieChartSkeleton />
@@ -77,15 +77,12 @@ export function RewardLine ({ total, time }) {
         {numWithUnits(total)} in rewards
       </span>
       {time &&
-        <Countdown
+        <small style={{ whiteSpace: 'nowrap' }}>
+          <CompactLongCountdown
+            className='text-monospace'
             date={time}
-          renderer={props =>
-            <small className='text-monospace' suppressHydrationWarning style={{ whiteSpace: 'nowrap' }}>
-              {props.formatted.days
-                ? ` ${props.formatted.days}d ${props.formatted.hours}h ${props.formatted.minutes}m ${props.formatted.seconds}s`
-                : ` ${props.formatted.hours}:${props.formatted.minutes}:${props.formatted.seconds}`}
+          />
         </small>}
-        />}
     </>
   )
 }