bitcoin::secp256k1::rand::{self, RngCore},
  };

  #[test]
  fn height_limit() {
    {
      let context = Context::builder().args(["--height-limit", "0"]).build();
      context.mine_blocks(1);
      assert_eq!(context.index.block_height().unwrap(), None);
      assert_eq!(context.index.block_count().unwrap(), 0);
    }

    {
      let context = Context::builder().args(["--height-limit", "1"]).build();
      context.mine_blocks(1);
      assert_eq!(context.index.block_height().unwrap(), Some(Height(0)));
      assert_eq!(context.index.block_count().unwrap(), 1);
    }

    {
      let context = Context::builder().args(["--height-limit", "2"]).build();
      context.mine_blocks(2);
      assert_eq!(context.index.block_height().unwrap(), Some(Height(1)));
      assert_eq!(context.index.block_count().unwrap(), 2);
    }
  }

  #[test]
  fn inscriptions_below_first_inscription_height_are_skipped() {
    let inscription = inscription("text/plain;charset=utf-8", "hello");
    let template = TransactionTemplate {