gistfile1.txt

const readline = require("readline-sync");

function main() {
  clear();
  let op;

  do {
    op = readline.questionInt(
      "1. Add a new block\n2. Print the chain\n0. Exit\n"
    );
    clear();
    switch (op) {
      case 1:
        const amount = readline.questionInt("Amount: ");
        const message = readline.question("Message: ");
        console.log("Block added!");
        clear(true);
        break;
      case 2:
        clear(true);
        break;
      case 0:
        console.info("Bye!");
        break;
      default:
        console.error("Invalid option");
        clear();
        break;
    }
  } while (op !== 0);
}

function clear(pressAnyKey) {
  if (pressAnyKey) readline.keyIn("Press any key to continue...");
  console.clear();
}

main();