Eesti Pank carried out a research project into the technical possibilities for a digital euro alongside the European Central Bank and seven other central banks of the euro area. The experiment established that a novel blockchain-based solution could in theory support almost unlimited numbers of payments being processed at the same time with a very large money supply and with a smaller carbon footprint than the card payment system. The blockchain-based solution would also permit a good balance between privacy and the need to meet anti-money laundering requirements.