Bitcoin Core

Bitcoin Core is an open-source software, pivotal to the Bitcoin network. It operates as a Bitcoin node and offers a comprehensive wallet that thoroughly verifies transactions. Originally released under the name “Bitcoin” by creator Satoshi Nakamoto, it was later rebranded to “Bitcoin Core” to clearly differentiate it from the broader network. This software is sometimes referred to as the Satoshi client.

Bitcoin Core plays a crucial role in maintaining the integrity of the Bitcoin network by validating the entire blockchain, which records all Bitcoin transactions. As of January 2019, this blockchain had grown to over 235 gigabytes, necessitating its download or synchronization for the software to function fully. The software is notable for its inclusion of a scripting language, inspired by Forth, which allows for the definition and parameter specification of transactions.

The original developer of Bitcoin Core aimed to validate the feasibility of a decentralized electronic cash system. Wladimir J. van der Laan has been the lead developer since April 8, 2014, succeeding Gavin Andresen. Andresen shifted focus from direct software development to strategic technological advancement in the Bitcoin field. Bitcoin Core was at the center of a controversy in 2015 involving Bitcoin XT, an alternative client proposing an increase in block size.

The development of Bitcoin Core is supported by numerous companies and industry groups. In 2019, MIT announced a $900,000 donation to the Digital Currency Initiative, with a significant portion allocated to Bitcoin Core developers.