start pow server work

server/.gitignore

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+node_modules
+bun.lockb

server/index.ts

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+import express from 'express';
+import bodyParser from 'body-parser';
+import { minePow } from 'nostr-tools/lib/types/nip13';
+
+const app = express();
+const port = 3000;
+
+// Use body-parser middleware to parse JSON requests
+app.use(bodyParser.json());
+
+app.post('/powgen', async (req, res) => {
+  try {
+    const { unsigned, difficulty } = req.body;
+
+    // Validate input
+    if (!unsigned || !difficulty) {
+      return res.status(400).send('Missing unsigned event or difficulty.');
+    }
+
+    // Call minePow function to generate PoW
+    const result = minePow(unsigned, difficulty);
+
+    // Send back the result
+    res.json(result);
+  } catch (error) {
+    console.error('Error generating PoW:', error);
+    res.status(500).send('Internal server error');
+  }
+});
+
+app.listen(port, () => {
+  console.log(`Server running at http://localhost:${port}`);
+});

server/package.json

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+{
+  "name": "server",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "dev": "tsc && node dist/index.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@types/express": "^4.17.21",
+    "@types/node": "^20.9.1",
+    "express": "^4.18.2",
+    "nostr-tools": "^1.17.0",
+    "typescript": "^5.2.2"
+  }
+}

server/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "es6",
+    "module": "commonjs",
+    "rootDir": "./",
+    "outDir": "./dist",
+    "esModuleInterop": true,
+    "strict": true,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*", "index.ts"],
+  "exclude": ["node_modules"]
+}