Blockchain was one of the technologies which I predicted back in January to break through in 2017.
The distributed, consensus-dependent ledger technology is really just a new form of database â€“ but due to its trustless and encrypted nature, one which could potentially revolutionize many aspects of finance and business.
Virtual currency Bitcoin is undoubtedly the most visible implementation of the technology right now â€“ its rapid growth in value has made it attractive to speculative investors but businesses are increasingly accepting it for goods and services.
Recent developments in the bitcoin economy â€“ an economy currently valued at close to $70 billion â€“ have demonstrated some of the fundamental characteristics of blockchain-based applications. And although it is still early days, they appear to go some way towards validating the claims of blockchain evangelists that the platform represents a robust and truly decentralized medium for logging data transactions.
(For those who are completely new to this, my Complete Beginnerâ€™s Guide to Bitcoin provides an overview of the important ideas)
Blockchain split â€“ what is it all about?
Blockchain apps and Blockchain-based currency such as Bitcoin in their purest form are decentralized and governed by consensus â€“ there is no controlling authority (such as a bank or government) which can interfere with supply or disrupt Bitcoin-driven commerce (except, in the case of governments, by legislating).
One way to think of it is that Bitcoin is entirely deterministic â€“ it is governed by mathematics and encryption and adjudicated by the consensus of its users. These â€œrulesâ€ were put into place when the cryptocurrency was unleashed on the world in 2011. Crucially, however, built into the model is the ability for it to adapt and evolve to changing circumstances.
One such changing circumstance is the vast increase in the amount of users, and therefore the amount of transactions being written to the blockchain itself. Transactions are approved by â€œminersâ€ â€“ individuals and groups providing the processing grunt to cryptographical algorithms which securely record the movement of coins between wallets.
Inevitably this led to a slowdown â€“ with increasing numbers of transactions being written, transactions had begun to take longer to be recorded (sometimes days) and the fees â€“ fractional values of Bitcoin which are shaved off transactions and passed to miners as â€œpaymentâ€ for their processing services â€“ creeping up.
Basically, because what happened next is a great example of why blockchain-based applications are so revolutionary. Because the software used to operate Bitcoin wallets and nodes is open source, anyone can â€œforkâ€ it â€“ producing a parallel blockchain operating independently of the original. This is what happened at the start of this month, bringing into existence a new version of the currency known as â€œBitcoin Cashâ€ (with the original increasingly being referred to as Bitcoin Core to avoid confusion.)
Whether the new currency â€“ allowing larger size blocks of data to be written to the new chain, therefore speeding up transactions â€“ goes on to enjoy the success of its older brother will depend entirely on consensus â€“ how well-used it becomes. This means the whole issue of the split is resolved in a democratic process. Of course, unlike with, say, elections, no human counting, verification or oversight is necessary (or possible) â€“ meaning there can be no corruption. The entire process is managed and governed by the original â€œtrustlessâ€ cryptographical framework created for Bitcoin.