feat: auto-patch clob-client proxy support via postinstall script

The proxy patch in node_modules is lost on every fresh npm install. This postinstall script automatically patches @polymarket/clob-client http-helpers to inject HttpsProxyAgent for all polymarket.com requests. Runs automatically after npm install — no manual patching needed on VPS deploy. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-27 13:49:52 +07:00
parent d82c5fd14e
commit b4d6d648bd
2 changed files with 89 additions and 1 deletions
@@ -0,0 +1,87 @@
+/**
+ * patch-clob-client.cjs
+ *
+ * Patches @polymarket/clob-client to inject proxy support.
+ * Runs automatically via `npm install` (postinstall hook).
+ *
+ * What it does:
+ *   - Adds HttpsProxyAgent import to http-helpers/index.js
+ *   - Injects proxy agent into every axios request to polymarket.com
+ *   - Reads PROXY_URL from process.env at runtime
+ */
+
+const fs = require('fs');
+const path = require('path');
+
+const TARGET = path.join(
+    __dirname,
+    '..',
+    'node_modules',
+    '@polymarket',
+    'clob-client',
+    'dist',
+    'http-helpers',
+    'index.js',
+);
+
+if (!fs.existsSync(TARGET)) {
+    console.log('[patch] @polymarket/clob-client not found — skipping');
+    process.exit(0);
+}
+
+let code = fs.readFileSync(TARGET, 'utf8');
+
+// Check if already patched
+if (code.includes('getProxyAgent')) {
+    console.log('[patch] @polymarket/clob-client already patched — skipping');
+    process.exit(0);
+}
+
+// Find the line after the axios import to inject proxy code
+const AXIOS_IMPORT = `require("axios")`;
+if (!code.includes(AXIOS_IMPORT)) {
+    console.error('[patch] Could not find axios import in http-helpers — skipping');
+    process.exit(0);
+}
+
+// Inject proxy imports and helper after axios import line
+const PROXY_CODE = `
+// Proxy support for Polymarket API (auto-patched by scripts/patch-clob-client.cjs)
+const https_proxy_agent_1 = require("https-proxy-agent");
+const getProxyAgent = () => {
+    if (process.env.PROXY_URL) {
+        return new https_proxy_agent_1.HttpsProxyAgent(process.env.PROXY_URL);
+    }
+    return undefined;
+};`;
+
+// Insert after the browser_or_node require line
+const INSERT_AFTER = `require("browser-or-node");`;
+if (!code.includes(INSERT_AFTER)) {
+    console.error('[patch] Could not find browser-or-node import — skipping');
+    process.exit(0);
+}
+
+code = code.replace(INSERT_AFTER, INSERT_AFTER + PROXY_CODE);
+
+// Patch the request function to inject proxy agent
+const REQUEST_CONFIG = `const config = { method, url: endpoint, headers, data, params };`;
+const PATCHED_CONFIG = `const config = { method, url: endpoint, headers, data, params };
+    // Add proxy agent for Polymarket API
+    if (endpoint && endpoint.includes('polymarket.com')) {
+        const agent = getProxyAgent();
+        if (agent) {
+            config.httpsAgent = agent;
+            config.proxy = false;
+        }
+    }`;
+
+if (!code.includes(REQUEST_CONFIG)) {
+    console.error('[patch] Could not find request config line — skipping');
+    process.exit(0);
+}
+
+code = code.replace(REQUEST_CONFIG, PATCHED_CONFIG);
+
+fs.writeFileSync(TARGET, code, 'utf8');
+console.log('[patch] @polymarket/clob-client patched with proxy support ✅');