Generate vanity Ethereum addresses

generate.js

// ethers.js doesn't seem to support generating 24-word mnemonic phrases. Instead, we use
// terra.js to generate the phrases, and use ethers to convert them to Ethereum addresses.
//
// How to use:
//
// > npm install ethers @terra-money/terra.js
// > node generate.js
//
const { MnemonicKey } = require("@terra-money/terra.js");
const { Wallet } = require("ethers");

const total = 16 ** 6; // How many mnemonic phrases to generate before we give up

const criterion = (address) => {
  if (
    address.startsWith("0x000000") ||
    address.startsWith("0x123456") ||
    address.startsWith("0x888888") ||
    address.startsWith("0x999999")
  ) {
    return true;
  }
  return false;
};

for (let i = 1; i <= total; i++) {
  let mk = new MnemonicKey();
  let wallet = Wallet.fromMnemonic(mk.mnemonic);

  console.log(`${i}/${total} ${wallet.address}`);

  if (criterion(wallet.address)) {
    console.log("Found it!");
    console.log("Mnemonic:", mk.mnemonic);
    process.exit(0);
  }
}

console.log("No result found :(");