When Satoshi Nakamoto created Bitcoin, the full node client came with a wallet often referred to as Bitcoin-Qt. Nakamoto’s simplified payment verification (SPV) concept was not available until two years later, after the former Bitcoin Core developer Mike Hearn published BitcoinJ in 2011. However, prior to the first SPV client or optimized lightweight bitcoin wallet, the first phone-to-phone bitcoin transaction occurred more than 11 years ago on December 7, 2010. Sending 0.42 Bitcoin From a Nokia N900 to Another Nokia N900 in 2010 Satoshi’s Bitcoin is nearing its 14-year anniversary, which will occur on January 3, 2023, and to date, the Bitcoin network has been functional 99.98777985271% of the time since its inception on January 3, 2009. During the first few years of Bitcoin’s life, the ecosystem had very little infrastructure compared to today’s plethora of crypto exchanges and bitcoin wallets . The protocol’s second Bitcoin client in the network’s history, Bitcoind was published
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