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| 1 | +// Cloudflare Worker proxy for fine-tx |
| 2 | + |
| 3 | +import { Hono } from 'hono'; |
| 4 | +import { proxy } from 'hono/proxy'; |
| 5 | +import { logger } from 'hono/logger'; |
| 6 | +import convict from 'convict'; |
| 7 | +import { LRUCache } from 'lru-cache'; |
| 8 | + |
| 9 | +const config = convict({ |
| 10 | + port: { |
| 11 | + doc: 'The port to bind the proxy server to', |
| 12 | + format: 'port', |
| 13 | + default: 5173, |
| 14 | + env: 'PORT', |
| 15 | + }, |
| 16 | + betterfrostUrl: { |
| 17 | + doc: 'URL for the Betterfrost API', |
| 18 | + format: String, |
| 19 | + default: 'http://0.0.0.0:3001', |
| 20 | + env: 'VITE_BETTERFROST_URL', |
| 21 | + }, |
| 22 | + blockfrostProjectId: { |
| 23 | + doc: 'Project ID for Blockfrost API (optional, if not using Betterfrost)', |
| 24 | + format: String, |
| 25 | + default: '', |
| 26 | + env: 'VITE_BLOCKFROST_PROJECT_ID', |
| 27 | + }, |
| 28 | + cacheSize: { |
| 29 | + doc: 'Size of the cache in bytes', |
| 30 | + format: Number, |
| 31 | + default: 0, |
| 32 | + env: 'PROXY_CACHE_SIZE', |
| 33 | + }, |
| 34 | + registryUrl: { |
| 35 | + doc: 'URL for the token registry service', |
| 36 | + format: String, |
| 37 | + default: 'https://public.liqwid.finance/v4', |
| 38 | + env: 'VITE_REGISTRY_URL', |
| 39 | + }, |
| 40 | +}); |
| 41 | + |
| 42 | +config.validate({ allowed: 'strict' }); |
| 43 | + |
| 44 | +const app = new Hono(); |
| 45 | + |
| 46 | +app.use(logger()); |
| 47 | + |
| 48 | +const cache = new LRUCache<string, Blob>({ |
| 49 | + max: config.get('cacheSize'), |
| 50 | + ttl: 60 * 30 * 1000, |
| 51 | +}); |
| 52 | + |
| 53 | +function key(url: string, options: RequestInit) { |
| 54 | + return `${url}-${options.body}`; |
| 55 | +} |
| 56 | + |
| 57 | +async function betterfrostProxy( |
| 58 | + url: string, |
| 59 | + options: RequestInit, |
| 60 | +): Promise<Response> { |
| 61 | + const k = key(url, options); |
| 62 | + const cachedResponse = cache.get(k); |
| 63 | + if (cachedResponse) { |
| 64 | + console.log(`--> CACHE HIT ${k}`); |
| 65 | + return new Response(cachedResponse); |
| 66 | + } |
| 67 | + |
| 68 | + console.log(`--> CACHE MISS ${k}`); |
| 69 | + |
| 70 | + const response = await proxy(url, { |
| 71 | + ...options, |
| 72 | + }); |
| 73 | + |
| 74 | + const blob = await response.blob(); |
| 75 | + |
| 76 | + console.log(`--> CACHE SET ${k} (${blob.size} bytes)`); |
| 77 | + |
| 78 | + const res = new Response(blob); |
| 79 | + |
| 80 | + cache.set(k, blob); |
| 81 | + |
| 82 | + return res; |
| 83 | +} |
| 84 | + |
| 85 | +// Proxy routes |
| 86 | +app.all('/betterfrost/*', async (c) => { |
| 87 | + const targetUrl = c.req.path.replace('/betterfrost', ''); |
| 88 | + |
| 89 | + const extraHeaders = config.get('blockfrostProjectId') |
| 90 | + ? ({ |
| 91 | + project_id: config.get('blockfrostProjectId') ?? '', |
| 92 | + } as Record<string, string>) |
| 93 | + : {}; |
| 94 | + |
| 95 | + const response = await betterfrostProxy( |
| 96 | + `${config.get('betterfrostUrl')}${targetUrl}`, |
| 97 | + { |
| 98 | + method: c.req.method, |
| 99 | + body: c.req.raw.body, |
| 100 | + headers: { |
| 101 | + ...c.req.raw.headers, |
| 102 | + 'User-Agent': c.req.raw.headers['User-Agent'], |
| 103 | + ...extraHeaders, |
| 104 | + }, |
| 105 | + }, |
| 106 | + ); |
| 107 | + |
| 108 | + return response; |
| 109 | +}); |
| 110 | + |
| 111 | +app.all('/ogmios/*', async (c) => { |
| 112 | + return c.json({ error: 'OGMIOS_URL not set. Not available!' }); |
| 113 | +}); |
| 114 | + |
| 115 | +app.get('/registry-proxy/:path', async (c) => { |
| 116 | + return proxy(`${config.get('registryUrl')}/${c.req.param('path')}`); |
| 117 | +}); |
| 118 | + |
| 119 | +console.log(` |
| 120 | + Proxy started on http://0.0.0.0:${config.get('port')} 🚀 |
| 121 | +
|
| 122 | + Requests for /betterfrost => ${config.get('betterfrostUrl')} |
| 123 | + Requests for /ogmios => Not available |
| 124 | + Requests for /registry-proxy => ${config.get('registryUrl')} |
| 125 | +`); |
| 126 | + |
| 127 | +// Start the server |
| 128 | +export default { |
| 129 | + port: config.get('port'), |
| 130 | + fetch: app.fetch, |
| 131 | +}; |
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