blockscout · tom2drum · Sep 25, 2023 · Sep 13, 2023 · Sep 14, 2023 · Sep 21, 2023
diff --git a/configs/app/index.ts b/configs/app/index.ts
@@ -2,6 +2,7 @@ import api from './api';
 import app from './app';
 import chain from './chain';
 import * as features from './features';
+import meta from './meta';
 import services from './services';
 import UI from './ui';
 
@@ -12,6 +13,7 @@ const config = Object.freeze({
   UI,
   features,
   services,
+  meta,
 });
 
 export default config;
diff --git a/configs/app/meta.ts b/configs/app/meta.ts
@@ -0,0 +1,14 @@
+import app from './app';
+import { getEnvValue, getExternalAssetFilePath } from './utils';
+
+const defaultImageUrl = app.baseUrl + '/static/og_placeholder.png';
+
+const meta = Object.freeze({
+  promoteBlockscoutInTitle: getEnvValue(process.env.NEXT_PUBLIC_PROMOTE_BLOCKSCOUT_IN_TITLE) || 'true',
+  og: {
+    description: getEnvValue(process.env.NEXT_PUBLIC_OG_DESCRIPTION) || '',
+    imageUrl: getExternalAssetFilePath('NEXT_PUBLIC_OG_IMAGE_URL', process.env.NEXT_PUBLIC_OG_IMAGE_URL) || defaultImageUrl,
+  },
+});
+
+export default meta;
diff --git a/configs/envs/.env.eth b/configs/envs/.env.eth
@@ -41,3 +41,6 @@ NEXT_PUBLIC_STATS_API_HOST=https://stats-eth-main.k8s.blockscout.com
 NEXT_PUBLIC_VISUALIZE_API_HOST=https://visualizer.services.blockscout.com
 NEXT_PUBLIC_CONTRACT_INFO_API_HOST=https://contracts-info.services.blockscout.com
 NEXT_PUBLIC_ADMIN_SERVICE_API_HOST=https://admin-rs.services.blockscout.com
+
+#meta
+NEXT_PUBLIC_OG_IMAGE_URL=https://github.com/blockscout/frontend-configs/blob/main/configs/og-images/eth.jpg?raw=true
diff --git a/configs/envs/.env.eth_goerli b/configs/envs/.env.eth_goerli
@@ -46,3 +46,6 @@ NEXT_PUBLIC_VISUALIZE_API_HOST=https://visualizer.services.blockscout.com
 NEXT_PUBLIC_CONTRACT_INFO_API_HOST=https://contracts-info.services.blockscout.com
 NEXT_PUBLIC_ADMIN_SERVICE_API_HOST=https://admin-rs.services.blockscout.com
 NEXT_PUBLIC_WEB3_WALLETS=['token_pocket','metamask']
+
+#meta
+NEXT_PUBLIC_OG_IMAGE_URL=https://github.com/blockscout/frontend-configs/blob/main/configs/og-images/eth-goerli.png?raw=true
diff --git a/configs/envs/.env.polygon b/configs/envs/.env.polygon
@@ -40,4 +40,7 @@ NEXT_PUBLIC_APP_ENV=development
 NEXT_PUBLIC_HAS_BEACON_CHAIN=false
 # NEXT_PUBLIC_STATS_API_HOST=https://stats-rsk-testnet.k8s.blockscout.com
 NEXT_PUBLIC_VISUALIZE_API_HOST=https://visualizer.services.blockscout.com
-NEXT_PUBLIC_WEB3_WALLETS=['token_pocket','metamask']
+NEXT_PUBLIC_WEB3_WALLETS=['token_pocket','metamask']
+
+#meta
+NEXT_PUBLIC_OG_IMAGE_URL=https://github.com/blockscout/frontend-configs/blob/main/configs/og-images/polygon-mainnet.png?raw=true
diff --git a/configs/envs/.env.rootstock b/configs/envs/.env.rootstock
@@ -41,3 +41,6 @@ NEXT_PUBLIC_GRAPHIQL_TRANSACTION=0x97fa753626b8d44011d0b9f9a947c735f20b6e895efde
 NEXT_PUBLIC_HAS_BEACON_CHAIN=false
 NEXT_PUBLIC_STATS_API_HOST=https://stats-rsk-testnet.k8s.blockscout.com
 NEXT_PUBLIC_VISUALIZE_API_HOST=https://visualizer.services.blockscout.com
+
+#meta
+NEXT_PUBLIC_OG_IMAGE_URL=https://github.com/blockscout/frontend-configs/blob/main/configs/og-images/rootstock-testnet.png?raw=true
diff --git a/deploy/scripts/download_assets.sh b/deploy/scripts/download_assets.sh
@@ -21,6 +21,7 @@ ASSETS_ENVS=(
     "NEXT_PUBLIC_NETWORK_LOGO_DARK"
     "NEXT_PUBLIC_NETWORK_ICON"
     "NEXT_PUBLIC_NETWORK_ICON_DARK"
+    "NEXT_PUBLIC_OG_IMAGE_URL"
 )
 
 # Create the assets directory if it doesn't exist

diff --git a/deploy/tools/envs-validator/schema.ts b/deploy/tools/envs-validator/schema.ts
@@ -323,6 +323,9 @@ const schema = yup
       }),
     NEXT_PUBLIC_WEB3_DISABLE_ADD_TOKEN_TO_WALLET: yup.boolean(),
     NEXT_PUBLIC_AD_TEXT_PROVIDER: yup.string<AdTextProviders>().oneOf(SUPPORTED_AD_TEXT_PROVIDERS),
+    NEXT_PUBLIC_PROMOTE_BLOCKSCOUT_IN_TITLE: yup.boolean(),
+    NEXT_PUBLIC_OG_DESCRIPTION: yup.string(),
+    NEXT_PUBLIC_OG_IMAGE_URL: yup.string().url(),
 
     // 6. External services envs
     NEXT_PUBLIC_WALLET_CONNECT_PROJECT_ID: yup.string(),

diff --git a/deploy/values/review-l2/values.yaml.gotmpl b/deploy/values/review-l2/values.yaml.gotmpl
@@ -144,3 +144,5 @@ frontend:
       _default: ref+vault://deployment-values/blockscout/dev/review-l2?token_env=VAULT_TOKEN&address=https://vault.k8s.blockscout.com#/NEXT_PUBLIC_GOOGLE_ANALYTICS_PROPERTY_ID
     NEXT_PUBLIC_FAVICON_GENERATOR_API_KEY:
       _default: ref+vault://deployment-values/blockscout/common?token_env=VAULT_TOKEN&address=https://vault.k8s.blockscout.com#/NEXT_PUBLIC_FAVICON_GENERATOR_API_KEY
+    NEXT_PUBLIC_OG_IMAGE_URL:
+      _default: https://github.com/blockscout/frontend-configs/blob/main/configs/og-images/base-goerli.png?raw=true
diff --git a/docs/ENVS.md b/docs/ENVS.md
@@ -13,6 +13,7 @@ The app instance could be customized by passing following variables to NodeJS en
   - [Sidebar](ENVS.md#sidebar)
   - [Footer](ENVS.md#footer)
   - [Favicon](ENVS.md#favicon)
+  - [Meta](ENVS.md#meta)
   - [Views](ENVS.md#views)
     - [Block](ENVS.md#block-views)
   - [Misc](ENVS.md#misc)
@@ -145,6 +146,18 @@ By default, the app has generic favicon. You can override this behavior by provi
 
 &nbsp;
 
+### Meta
+
+Settings for meta tags and OG tags
+
+| Variable | Type| Description | Compulsoriness  | Default value | Example value |
+| --- | --- | --- | --- | --- | --- |
+| NEXT_PUBLIC_PROMOTE_BLOCKSCOUT_IN_TITLE | `boolean` | Set to `true` to promote Blockscout in meta and OG titles | - | `true` | `true` |
+| NEXT_PUBLIC_OG_DESCRIPTION | `string` | Custom OG description | - | - | `Blockscout is the #1 open-source blockchain explorer available today. 100+ chains and counting rely on Blockscout data availability, APIs, and ecosystem tools to support their networks.` |
+| NEXT_PUBLIC_OG_IMAGE_URL | `string` | OG image url. Minimum image size is 200 x 20 pixels (recommended: 1200 x 600); maximum supported file size is 8 MB; 2:1 aspect ratio; supported formats: image/jpeg, image/gif, image/png | - | `static/og_placeholder.png` | `https://placekitten.com/1200/600` |
+
+&nbsp;
+
 ### Views
 
 #### Block views

diff --git a/lib/metadata/__snapshots__/generate.test.ts.snap b/lib/metadata/__snapshots__/generate.test.ts.snap
@@ -3,20 +3,35 @@
 exports[`generates correct metadata for: dynamic route 1`] = `
 {
   "description": "View transaction 0x12345 on Blockscout (Blockscout) Explorer",
+  "opengraph": {
+    "description": "",
+    "imageUrl": "",
+    "title": "Blockscout transaction 0x12345 | Blockscout",
+  },
   "title": "Blockscout transaction 0x12345 | Blockscout",
 }
 `;
 
 exports[`generates correct metadata for: dynamic route with API data 1`] = `
 {
   "description": "0x12345, balances and analytics on the Blockscout (Blockscout) Explorer",
+  "opengraph": {
+    "description": "",
+    "imageUrl": "",
+    "title": "Blockscout USDT token details | Blockscout",
+  },
   "title": "Blockscout USDT token details | Blockscout",
 }
 `;
 
 exports[`generates correct metadata for: static route 1`] = `
 {
   "description": "Blockscout is the #1 open-source blockchain explorer available today. 100+ chains and counting rely on Blockscout data availability, APIs, and ecosystem tools to support their networks.",
+  "opengraph": {
+    "description": "",
+    "imageUrl": "http://localhost:3000/static/og_placeholder.png",
+    "title": "Blockscout blocks | Blockscout",
+  },
   "title": "Blockscout blocks | Blockscout",
 }
 `;
diff --git a/lib/metadata/generate.ts b/lib/metadata/generate.ts
@@ -6,6 +6,7 @@ import config from 'configs/app';
 import getNetworkTitle from 'lib/networks/getNetworkTitle';
 
 import compileValue from './compileValue';
+import getPageOgType from './getPageOgType';
 import * as templates from './templates';
 
 export default function generate<R extends Route>(route: R, apiData?: ApiData<R>): Metadata {
@@ -16,11 +17,19 @@ export default function generate<R extends Route>(route: R, apiData?: ApiData<R>
     network_title: getNetworkTitle(),
   };
 
-  const title = compileValue(templates.title.make(route.pathname), params);
+  const compiledTitle = compileValue(templates.title.make(route.pathname), params);
+  const title = compiledTitle ? compiledTitle + (config.meta.promoteBlockscoutInTitle ? ' | Blockscout' : '') : '';
   const description = compileValue(templates.description.make(route.pathname), params);
 
+  const pageOgType = getPageOgType(route.pathname);
+
   return {
-    title,
+    title: title,
     description,
+    opengraph: {
+      title: title,
+      description: pageOgType !== 'Regular page' ? config.meta.og.description : '',
+      imageUrl: pageOgType !== 'Regular page' ? config.meta.og.imageUrl : '',
+    },
   };
 }
diff --git a/lib/metadata/getPageOgType.ts b/lib/metadata/getPageOgType.ts
@@ -0,0 +1,52 @@
+import type { Route } from 'nextjs-routes';
+
+type OGPageType = 'Homepage' | 'Root page' | 'Regular page';
+
+const OG_TYPE_DICT: Record<Route['pathname'], OGPageType> = {
+  '/': 'Homepage',
+  '/txs': 'Root page',
+  '/tx/[hash]': 'Regular page',
+  '/blocks': 'Root page',
+  '/block/[height_or_hash]': 'Regular page',
+  '/accounts': 'Root page',
+  '/address/[hash]': 'Regular page',
+  '/verified-contracts': 'Root page',
+  '/address/[hash]/contract-verification': 'Regular page',
+  '/tokens': 'Root page',
+  '/token/[hash]': 'Regular page',
+  '/token/[hash]/instance/[id]': 'Regular page',
+  '/apps': 'Root page',
+  '/apps/[id]': 'Regular page',
+  '/stats': 'Root page',
+  '/api-docs': 'Regular page',
+  '/graphiql': 'Regular page',
+  '/search-results': 'Regular page',
+  '/auth/profile': 'Root page',
+  '/account/watchlist': 'Regular page',
+  '/account/api-key': 'Regular page',
+  '/account/custom-abi': 'Regular page',
+  '/account/public-tags-request': 'Regular page',
+  '/account/tag-address': 'Regular page',
+  '/account/verified-addresses': 'Root page',
+  '/withdrawals': 'Root page',
+  '/visualize/sol2uml': 'Regular page',
+  '/csv-export': 'Regular page',
+  '/l2-deposits': 'Root page',
+  '/l2-output-roots': 'Root page',
+  '/l2-txn-batches': 'Root page',
+  '/l2-withdrawals': 'Root page',
+  '/404': 'Regular page',
+
+  // service routes, added only to make typescript happy
+  '/login': 'Regular page',
+  '/api/media-type': 'Regular page',
+  '/api/proxy': 'Regular page',
+  '/api/csrf': 'Regular page',
+  '/api/healthz': 'Regular page',
+  '/auth/auth0': 'Regular page',
+  '/auth/unverified-email': 'Regular page',
+};
+
+export default function getPageOgType(pathname: Route['pathname']) {
+  return OG_TYPE_DICT[pathname];
+}
diff --git a/lib/metadata/templates/title.ts b/lib/metadata/templates/title.ts
@@ -48,5 +48,5 @@ const TEMPLATE_MAP: Record<Route['pathname'], string> = {
 export function make(pathname: Route['pathname']) {
   const template = TEMPLATE_MAP[pathname];
 
-  return `%network_name% ${ template } | Blockscout`;
+  return `%network_name% ${ template }`;
 }
diff --git a/lib/metadata/types.ts b/lib/metadata/types.ts
@@ -10,4 +10,9 @@ never;
 export interface Metadata {
     title: string;
     description: string;
+    opengraph: {
+        title: string;
+        description?: string;
+        imageUrl?: string;
+    };
 }
diff --git a/nextjs/PageNextJs.tsx b/nextjs/PageNextJs.tsx
@@ -14,7 +14,7 @@ type Props = Route & {
 }
 
 const PageNextJs = (props: Props) => {
-  const { title, description } = metadata.generate(props);
+  const { title, description, opengraph } = metadata.generate(props);
 
   useGetCsrfToken();
   useAdblockDetect();
@@ -28,6 +28,12 @@ const PageNextJs = (props: Props) => {
       <Head>
         <title>{ title }</title>
         <meta name="description" content={ description }/>
+
+        { /* OG TAGS */ }
+        <meta property="og:title" content={ opengraph.title }/>
+        { opengraph.description && <meta property="og:description" content={ opengraph.description }/> }
+        <meta property="og:image" content={ opengraph.imageUrl }/>
+        <meta property="og:type" content="website"/>
       </Head>
       { props.children }
     </>

diff --git a/pages/_document.tsx b/pages/_document.tsx
@@ -5,7 +5,6 @@ import React from 'react';
 
 import * as serverTiming from 'nextjs/utils/serverTiming';
 
-import config from 'configs/app';
 import theme from 'theme';
 
 class MyDocument extends Document {
@@ -46,19 +45,6 @@ class MyDocument extends Document {
           <link rel="icon" sizes="16x16" type="image/png"href="/favicon/favicon-16x16.png"/>
           <link rel="apple-touch-icon" href="/favicon/apple-touch-icon-180x180.png"/>
           <link rel="mask-icon" href="/favicon/safari-pinned-tab.svg"/>
-
-          { /* OG TAGS */ }
-          <meta property="og:title" content="Blockscout: A block explorer designed for a decentralized world."/>
-          <meta
-            property="og:description"
-            // eslint-disable-next-line max-len
-            content="Blockscout is the #1 open-source blockchain explorer available today. 100+ chains and counting rely on Blockscout data availability, APIs, and ecosystem tools to support their networks."
-          />
-          <meta property="og:image" content={ config.app.baseUrl + '/static/og.png' }/>
-          <meta property="og:site_name" content="Blockscout"/>
-          <meta property="og:type" content="website"/>
-          <meta name="twitter:card" content="summary_large_image"/>
-          <meta property="twitter:image" content={ config.app.baseUrl + '/static/og_twitter.png' }/>
         </Head>
         <body>
           <ColorModeScript initialColorMode={ theme.config.initialColorMode }/>

diff --git a/public/static/og.png b/public/static/og.png
diff --git a/public/static/og_placeholder.png b/public/static/og_placeholder.png