Merge pull request #1 from deadlock-delegate/version

merge existing project

.eslintrc

@@ -0,0 +1,16 @@
+{
+  "env": {
+    "es6": true,
+    "node": true,
+    "jest": true
+  },
+  "extends": [
+    "standard"
+  ],
+  "parserOptions": {
+    "sourceType": "module"
+  },
+  "rules": {
+    "indent": ["error", 2]
+  }
+}

.gitignore

@@ -59,3 +59,7 @@ typings/
 
 # next.js build output
 .next
+.idea
+*.log
+node_modules
+.DS_Store

README.md

@@ -0,0 +1,23 @@
+# Crawler
+
+Crawler scans the ARK network to get information about the peers in the network.
+
+## Installation
+
+`npm install`
+
+## Usage
+
+`npm start http://<ip>:<port>`
+
+For port use the p2p port, which is 4001 for Ark's mainnet.
+
+## Credits
+
+- [roks0n](https://github.com/roks0n)
+- [dmvt](https://github.com/dmvt)
+- [All Contributors](../../../../contributors)
+
+## License
+
+[MIT](LICENSE) © roks0n

app.js

@@ -0,0 +1,46 @@
+const Crawler = require('./src/crawler')
+const { URL } = require('url')
+
+const crawler = new Crawler()
+const args = process.argv.slice(2)
+
+const report = (crawler) => {
+  const blockStats = {}
+
+  for (const item of crawler.heights) {
+    if (blockStats[item.height]) {
+      blockStats[item.height].count += 1
+      blockStats[item.height].ids[item.id] += 1
+    } else {
+      blockStats[item.height] = {}
+      blockStats[item.height].count = 1
+      blockStats[item.height].ids = {}
+      blockStats[item.height].ids[item.id] = 1
+    }
+  }
+
+  console.log(`===========================================`)
+  console.log(`Total nodes visited: ${Object.keys(crawler.nodes).length}`)
+  console.log(`Total nodes online: ${crawler.heights.length}`)
+  console.log(`------------------------------------------`)
+  console.log(`Block stats:`)
+  for (const stat in blockStats) {
+    console.log(`${blockStats[stat].count} nodes on height ${stat} with hashes:`)
+    for (const hash in blockStats[stat].ids) {
+      console.log(`  - ${hash} (${blockStats[stat].ids[hash]} nodes)`)
+    }
+  }
+  console.log(`------------------------------------------`)
+  console.log(`Finished scanning in ${new Date() - crawler.startTime}ms`)
+
+  process.exit(0)
+}
+
+let node = { ip: undefined, port: undefined }
+if (args.length === 1) {
+  const url = new URL(args[0])
+  node.ip = url.hostname
+  node.port = url.port
+}
+
+crawler.run(node).then(report)