https://medium.com/concordium-japan/concordiumbft%E3%81%AE%E7%B4%B9%E4%BB%8B-hotstuff%E3%83%99%E3%83%BC%E3%82%B9%E3%81%AE%E6%96%B0%E3%81%97%E3%81%84%E3%82%B3%E3%83%B3%E3%82%BB%E3%83%B3%E3%82%B5%E3%82%B9%E3%83%97%E3%83%AD%E3%83%88%E3%82%B3%E3%83%AB-55e0ecb8aa72
