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https://crypto-planet.net/2018/10/13/%cf%80%cf%8e%cf%82-%ce%bb%ce%b5%ce%b9%cf%84%ce%bf%cf%85%cf%81%ce%b3%ce%b5%ce%af-%cf%84%ce%bf-bitcoin-transaction/
Πώς λειτουργεί το Bitcoin Transaction