Initial commit: add .gitignore and README

extra/generate_node_details.js

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+const secp256k1 = require('secp256k1')
+const keccak = require('keccak')
+const { randomBytes } = require('crypto')
+const fs = require('fs')
+const Wallet = require('ethereumjs-wallet');
+const yargs = require('yargs/yargs');
+
+function generatePrivateKey() {
+  let privKey
+  do {
+    privKey = randomBytes(32)
+  } while (!secp256k1.privateKeyVerify(privKey))
+  return privKey
+}
+
+function derivePublicKey(privKey) {
+  // slice on the end to remove the compression prefix ie. uncompressed use 04 prefix & compressed use 02 or 03
+  // we generate the address, which wont work with the compression prefix
+  let pubKey = secp256k1.publicKeyCreate(privKey, false).slice(1)
+  return Buffer.from(pubKey)
+}
+  
+function deriveAddress(pubKey) {
+  if(!Buffer.isBuffer(pubKey)) {
+    console.log("ERROR - pubKey is not a buffer")
+  }
+  let keyHash = keccak('keccak256').update(pubKey).digest()
+  return keyHash.slice(Math.max(keyHash.length - 20, 1))
+}
+  
+function generateNodeData() {
+  let privateKey = generatePrivateKey()
+  let publicKey = derivePublicKey(privateKey)
+  let address = deriveAddress(publicKey)
+  console.log("keys created, writing to file...")
+  fs.writeFileSync("nodekey", privateKey.toString('hex'));
+  fs.writeFileSync("nodekey.pub", publicKey.toString('hex'));
+  fs.writeFileSync("address", address.toString('hex'));
+}
+
+async function main(password) {
+
+  // generate nodekeys
+  generateNodeData();
+
+  // generate account
+  const wallet = Wallet['default'].generate();
+  const v3keystore = await wallet.toV3(password);
+  console.log("account created, writing to file...")
+  fs.writeFileSync("accountKeystore", JSON.stringify(v3keystore));
+  fs.writeFileSync("accountPrivateKey", wallet.getPrivateKeyString());
+  fs.writeFileSync("accountPassword", password);
+  return {
+    privateKey: wallet.getPrivateKeyString(),
+    keystore: JSON.stringify(v3keystore),
+    password: password
+  }
+}
+
+try {
+  const args = yargs(process.argv.slice(2)).options({
+    password: { type: 'string', demandOption: false, default: '', describe: 'Password for the account' }
+  }).argv;
+  main(args.password);
+} catch {
+  console.error(e)
+}
+

extra/package.json

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+{
+  "name": "@consensys-software/generate_node_details",
+  "version": "1.0.0",
+  "description": "Example script to create nodekeys and address for a Quorum (Besu or GoQuorum) node",
+  "scripts": {},
+  "license": "Apache-2.0",
+  "dependencies": {
+    "secp256k1": "^4.0.0",
+    "keccak": "^3.0.0",
+    "ethereumjs-wallet": "^1.0.2",
+    "yargs": "^17.2.1"
+  }
+}