L11_TODO_6

{chain.map((b, i) => (
  <React.Fragment key={b.index}>
    <div className="block">
      <div>Block #{b.index}</div>
      <div>Timestamp: {new Date(b.timestamp).toLocaleString()}</div>
      <div>Miner: {b.miner}</div>
      <div>Nonce: {b.nonce}</div>
      <div>Hash: {short(b.hash, 20)}</div>
      <div>Prev: {short(b.prevHash, 20)}</div>
      <div>Tx count: {b.transactions.length}</div>
    </div>
    {i < chain.length - 1 && <div className="arrow">→</div>}
  </React.Fragment>
))}