Generate 200 million eth account genesis

200mil-eth-genesis.js

const fs = require("fs");
var JSONStream = require("JSONStream");
var LIMIT = 200000000;
var transformStream = JSONStream.stringifyObject(
  '{"config":{"chainId":15,"homesteadBlock":0,"eip155Block":0,"eip158Block":0},"difficulty":"20","gasLimit":"2100000","alloc":{',
  ",",
  "}}"
);
var outputStream = fs.createWriteStream("./sample-genesis.json");
transformStream.pipe(outputStream);
const gen = () => {
  var ok = true;
  do {
    LIMIT--;
    if (LIMIT % 100000 === 0) console.log(LIMIT);
    if (LIMIT === 0) {
      transformStream.write([
        Number(LIMIT)
          .toString(16)
          .padStart(40, "0"),
        {
          balance: "30000000000000000000"
        }
      ]);
      transformStream.end();
    } else {
      ok = transformStream.write([
        Number(LIMIT)
          .toString(16)
          .padStart(40, "0"),
        {
          balance: "30000000000000000000"
        }
      ]);
    }
  } while (LIMIT > 0 && ok);
  if (LIMIT > 0) {
    transformStream.once("drain", gen);
  }
};
gen();