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CryptoCompare\n * was the obvious choice and is now key-only — it answers 401 with \"API key\n * required\" — so this reads RSS instead, which stays open and needs nothing\n * stored on the val.\n *\n * A story is matched to a coin by looking for its name or ticker in the\n * headline. That is cruder than a category field, but the feeds don't publish\n * one, and a wrong-but-plausible tag would be worse than a loose match.\n *\n * Any failure returns an empty list rather than an error: news is decoration\n * on a price screen, and a coin screen that won't load because a feed is down\n * would be a worse app.\n */\n\nconst FEEDS = [\n { url: \"https://cointelegraph.com/rss\", name: \"Cointelegraph\" },\n { url: \"https://decrypt.co/feed\", name: \"Decrypt\" },\n];\n\n/** What to look for in a headline, per ticker. */\nconst TERMS: Record = {\n BTC: [\"bitcoin\", \"btc\"],\n ETH: [\"ethereum\", \"ether\", \"eth\"],\n XRP: [\"xrp\", \"ripple\"],\n SOL: [\"solana\", \"sol\"],\n ADA: [\"cardano\", \"ada\"],\n DOGE: [\"dogecoin\", \"doge\"],\n AVAX: [\"avalanche\", \"avax\"],\n DOT: [\"polkadot\", \"dot\"],\n LINK: [\"chainlink\", \"link\"],\n MATIC: [\"polygon\", \"matic\"],\n LTC: [\"litecoin\", \"ltc\"],\n UNI: [\"uniswap\", \"uni\"],\n};\n\ntype Article = {\n id: string;\n title: string;\n source: string;\n url: string;\n imageUrl: string;\n publishedAt: number;\n};\n\nlet cache: { at: number; articles: Article[] } | null = null;\nconst TTL_MS = 10 * 60 * 1000;\n\n/** Pulls one field out of an RSS , with or without CDATA. */\nfunction field(block: string, tag: string): string {\n const match = block.match(\n new RegExp(`<${tag}[^>]*>([\\\\s\\\\S]*?)`, \"i\"),\n );\n if (!match) return \"\";\n return match[1]\n .replace(//g, \"$1\")\n .replace(/<[^>]+>/g, \"\")\n .replace(/&/g, \"&\")\n .replace(/"/g, '\"')\n .replace(/’|’/g, \"'\")\n .replace(/‘|‘/g, \"'\")\n .replace(/ /g, \" \")\n .trim();\n}\n\n/** The first image the item mentions, whichever way it spells it. */\nfunction image(block: string): string {\n const patterns = [\n /]+url=\"([^\"]+)\"/i,\n /]+url=\"([^\"]+)\"/i,\n /]+url=\"([^\"]+)\"/i,\n /]+src=\"([^\"]+)\"/i,\n ];\n for (const pattern of patterns) {\n const match = block.match(pattern);\n if (match) return match[1];\n }\n return \"\";\n}\n\nasync function readFeed(url: string, name: string): Promise {\n const response = await fetch(url, {\n headers: { \"User-Agent\": \"Mozilla/5.0 (compatible; revolut-clone/1.0)\" },\n });\n if (!response.ok) return [];\n const xml = await response.text();\n\n const items = xml.split(/]/i).slice(1);\n return items.map((block) => {\n const link = field(block, \"link\");\n const date = field(block, \"pubDate\");\n return {\n id: field(block, \"guid\") || link,\n title: field(block, \"title\"),\n source: name,\n url: link,\n imageUrl: image(block),\n publishedAt: date ? Math.floor(new Date(date).getTime() / 1000) : 0,\n };\n }).filter((a) => a.title && a.url);\n}\n\nasync function load(): Promise {\n if (cache && Date.now() - cache.at < TTL_MS) return cache.articles;\n\n // One slow feed shouldn't take the other down with it.\n const results = await Promise.allSettled(\n FEEDS.map((feed) => readFeed(feed.url, feed.name)),\n );\n const articles = results\n .flatMap((result) => (result.status === \"fulfilled\" ? result.value : []))\n .sort((a, b) => b.publishedAt - a.publishedAt);\n\n if (articles.length > 0) cache = { at: Date.now(), articles };\n return articles.length > 0 ? articles : (cache?.articles ?? 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