Add a script to generate consensus keys

package.json

@@ -25,7 +25,8 @@
     "import-state:dev": "DEBUG=vulcanize:* ts-node src/cli/import-state.ts",
     "inspect-cid": "DEBUG=vulcanize:* ts-node src/cli/inspect-cid.ts",
     "index-block": "DEBUG=vulcanize:* ts-node src/cli/index-block.ts",
-    "peer": "DEBUG='vulcanize:*, laconic:*' node --enable-source-maps dist/cli/peer.js"
+    "peer": "DEBUG='vulcanize:*, laconic:*' node --enable-source-maps dist/cli/peer.js",
+    "gen-consensus-keys": "DEBUG=laconic:* node --enable-source-maps dist/cli/gen-consensus-keys.js"
   },
   "repository": {
     "type": "git",

src/cli/gen-consensus-keys.ts

@@ -0,0 +1,56 @@
+//
+// Copyright 2023 Vulcanize, Inc.
+//
+
+import crypto from 'crypto';
+import debug from 'debug';
+import fs from 'fs';
+import path from 'path';
+import { hideBin } from 'yargs/helpers';
+import yargs from 'yargs';
+
+const log = debug('laconic:gen-consensus-keys');
+
+interface Arguments {
+  file: string;
+}
+
+async function main (): Promise<void> {
+  const node = crypto.createECDH('secp256k1');
+  node.generateKeys('hex');
+  const obj = {
+    publicKey: node.getPublicKey('hex', 'compressed'),
+    privateKey: node.getPrivateKey('hex')
+  };
+
+  const argv: Arguments = _getArgv();
+  if (argv.file) {
+    const exportFilePath = path.resolve(argv.file);
+    const exportFileDir = path.dirname(exportFilePath);
+
+    if (!fs.existsSync(exportFileDir)) {
+      fs.mkdirSync(exportFileDir, { recursive: true });
+    }
+
+    fs.writeFileSync(exportFilePath, JSON.stringify(obj, null, 2));
+    log(`Key pair exported to file ${exportFilePath}`);
+  } else {
+    log(obj);
+  }
+}
+
+function _getArgv (): any {
+  return yargs(hideBin(process.argv)).parserConfiguration({
+    'parse-numbers': false
+  }).options({
+    file: {
+      type: 'string',
+      alias: 'f',
+      describe: 'Peer Id export file path (json)'
+    }
+  }).argv;
+}
+
+main().catch(err => {
+  log(err);
+});