prev next block

lib/block/getBlockReward.ts

@@ -5,7 +5,7 @@ import type { Block } from 'types/api/block';
 export default function getBlockReward(block: Block) {
   const txFees = utils.parseUnits(block.tx_fees || '0', 'wei');
   const burntFees = utils.parseUnits(String(block.burnt_fees || '0'), 'wei');
-  const totalReward = utils.parseUnits(String(block.rewards?.find(({ type }) => type === 'Miner Reward' || type === 'Validator Reward')?.reward) || '0', 'wei');
+  const totalReward = utils.parseUnits(String(block.rewards?.find(({ type }) => type === 'Miner Reward' || type === 'Validator Reward')?.reward || '0'), 'wei');
   const staticReward = totalReward.sub(txFees).add(burntFees);
 
   return {

theme/components/Button.ts

@@ -136,6 +136,10 @@ const variantSubtle = defineStyle((props) => {
       color: mode('blackAlpha.800', 'whiteAlpha.800')(props),
       _hover: {
         color: 'blue.400',
+        _disabled: {
+          color: mode('blackAlpha.800', 'whiteAlpha.800')(props),
+          bg: mode('blackAlpha.200', 'whiteAlpha.200')(props),
+        },
       },
     };
   }

ui/block/BlockDetails.tsx

-import { Grid, GridItem, Text, Icon, Link, Box, Tooltip } from '@chakra-ui/react';
+import { Grid, GridItem, Text, Icon, Link, Box, Tooltip, Alert } from '@chakra-ui/react';
 import { useQuery } from '@tanstack/react-query';
 import { utils } from 'ethers';
 import { useRouter } from 'next/router';
@@ -11,6 +11,7 @@ import clockIcon from 'icons/clock.svg';
 import flameIcon from 'icons/flame.svg';
 import getBlockReward from 'lib/block/getBlockReward';
 import dayjs from 'lib/date/dayjs';
+import type { ErrorType } from 'lib/hooks/useFetch';
 import useFetch from 'lib/hooks/useFetch';
 import useNetwork from 'lib/hooks/useNetwork';
 import { space } from 'lib/html-entities';
@@ -33,7 +34,7 @@ const BlockDetails = () => {
   const network = useNetwork();
   const fetch = useFetch();
 
-  const { data, isLoading, isError } = useQuery<unknown, unknown, Block>(
+  const { data, isLoading, isError, error } = useQuery<unknown, ErrorType<{ status: number }>, Block>(
     [ 'block', router.query.id ],
     async() => await fetch(`/api/blocks/${ router.query.id }`),
     {
@@ -49,12 +50,19 @@ const BlockDetails = () => {
     });
   }, []);
 
+  const handlePrevNextClick = React.useCallback((direction: 'prev' | 'next') => {
+    const increment = direction === 'next' ? +1 : -1;
+    const url = link('block_index', { id: String(Number(router.query.id) + increment) });
+    router.push(url, undefined, { shallow: true });
+  }, [ link, router ]);
+
   if (isLoading) {
     return <BlockDetailsSkeleton/>;
   }
 
   if (isError) {
-    return <DataFetchAlert/>;
+    const is404 = error?.error?.status === 404;
+    return is404 ? <Alert>This block has not been processed yet.</Alert> : <DataFetchAlert/>;
   }
 
   const sectionGap = <GridItem colSpan={{ base: undefined, lg: 2 }} mt={{ base: 1, lg: 4 }}/>;
@@ -67,7 +75,13 @@ const BlockDetails = () => {
         hint="The block height of a particular block is defined as the number of blocks preceding it in the blockchain."
       >
         { data.height }
-        <PrevNext ml={ 6 }/>
+        <PrevNext
+          ml={ 6 }
+          onClick={ handlePrevNextClick }
+          prevLabel="View previous block"
+          nextLabel="View next block"
+          isPrevDisabled={ router.query.id === '0' }
+        />
       </DetailsInfoItem>
       <DetailsInfoItem
         title="Size"
@@ -235,14 +249,16 @@ const BlockDetails = () => {
             </Box>
             <CopyToClipboard text={ data.hash }/>
           </DetailsInfoItem>
-          <DetailsInfoItem
-            title="Parent hash"
-            hint="The hash of the block from which this block was generated."
-            flexWrap="nowrap"
-          >
-            <AddressLink hash={ data.parent_hash } type="block" id={ String(data.height - 1) }/>
-            <CopyToClipboard text={ data.parent_hash }/>
-          </DetailsInfoItem>
+          { data.height > 0 && (
+            <DetailsInfoItem
+              title="Parent hash"
+              hint="The hash of the block from which this block was generated."
+              flexWrap="nowrap"
+            >
+              <AddressLink hash={ data.parent_hash } type="block" id={ String(data.height - 1) }/>
+              <CopyToClipboard text={ data.parent_hash }/>
+            </DetailsInfoItem>
+          ) }
           { /* api doesn't support state root yet */ }
           { /* <DetailsInfoItem
             title="State root"

ui/shared/PrevNext.tsx

-import { Box, Icon, IconButton, chakra } from '@chakra-ui/react';
+import { Box, Icon, IconButton, chakra, Tooltip } from '@chakra-ui/react';
 import React from 'react';
 
 import eastArrow from 'icons/arrows/east-mini.svg';
 
 interface Props {
   className?: string;
+  onClick: (direction: 'prev' | 'next') => void;
+  prevLabel?: string;
+  nextLabel?: string;
+  isPrevDisabled?: boolean;
+  isNextDisabled?: boolean;
 }
 
-const PrevNext = ({ className }: Props) => {
+const PrevNext = ({ className, onClick, prevLabel, nextLabel, isPrevDisabled, isNextDisabled }: Props) => {
+  const handelPrevClick = React.useCallback(() => {
+    onClick('prev');
+  }, [ onClick ]);
+
+  const handelNextClick = React.useCallback(() => {
+    onClick('next');
+  }, [ onClick ]);
+
   return (
     <Box className={ className }>
-      <IconButton
-        aria-label="prev"
-        icon={ <Icon as={ eastArrow } boxSize={ 6 }/> }
-        h={ 6 }
-        borderRadius="sm"
-        variant="subtle"
-        colorScheme="gray"
-      />
-      <IconButton
-        aria-label="next"
-        icon={ <Icon as={ eastArrow }boxSize={ 6 } transform="rotate(180deg)"/> }
-        h={ 6 }
-        borderRadius="sm"
-        variant="subtle"
-        colorScheme="gray"
-        ml="10px"
-      />
+      <Tooltip label={ prevLabel }>
+        <IconButton
+          aria-label="prev"
+          icon={ <Icon as={ eastArrow } boxSize={ 6 }/> }
+          h={ 6 }
+          borderRadius="sm"
+          variant="subtle"
+          colorScheme="gray"
+          onClick={ handelPrevClick }
+          disabled={ isPrevDisabled }
+        />
+      </Tooltip>
+      <Tooltip label={ nextLabel }>
+        <IconButton
+          aria-label="next"
+          icon={ <Icon as={ eastArrow }boxSize={ 6 } transform="rotate(180deg)"/> }
+          h={ 6 }
+          borderRadius="sm"
+          variant="subtle"
+          colorScheme="gray"
+          ml="10px"
+          onClick={ handelNextClick }
+          disabled={ isNextDisabled }
+        />
+      </Tooltip>
     </Box>
   );
 };