rpow

Nearly a year and a half after the minting of the first blocks of the chain and demonstration that block chain was viable in code as a reusable proof-of-work system (a cryptographic transfer wherein one party shows to another that an established amount of computational effort has been expended with no other disclosure between the two sides), the first known cryptocurrency commercial transaction (see also) occurred between a programmer and a pizza chain, the later exchanging ten thousand bitcoin for two pies on this day in 2010. At the time of publication, this figure is valued at over three-hundred thirteen million euro.