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Chances are you hear the term bitcoin mining and your mind begins to wander to the Western fantasy of pickaxes, dirt, and striking it rich. As it turns out, that analogy isnt too far off.
Far less glamorous but equally uncertain, bitcoin mining is done by high-powered computers that solve complex computational science issues (read: so complicated that they cannot be solved by hand). The luck and work required by a computer to solve one of these problems is the equivalent of a miner striking gold in the ground while digging in a sandbox.
The result of bitcoin mining is twofold. First, when computers solve these complex math problems on the bitcoin networkthey produce new bitcoin, not unlike when a mining operation extracts gold in the ground. And second, by solving computational math problems, bitcoin miners make the bitcoin payment network dependable and protected, by verifying its transaction information. .
Theres a good chance all of that only made so much sense. In order to explain how bitcoin mining functions in detail, lets begin with a process thats a little bit closer to home: the regulation of printed currency.
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Consumers tend to anticipate printed currencies, at least in the United States. Thats because the U.S. dollar is backed by a central bank known as the Federal Reserve. In addition to a host of other responsibilities, the Federal Reserve modulates the production of new money and prosecutes the usage of counterfeit currency. .
Even digital payments using the U.S. buck are backed with a central authority. When you make an online purchase using your debit or credit card, for instance, that transaction is processed by means of a payment processing company such as Mastercard or Visa. In addition to recording your transaction history, these companies verify that transactions are not fraudulent, and that's one reason your debit or credit card could be suspended while traveling. .
Bitcoin, on the other hand, is not controlled by a central authority. Instead, bitcoin is endorsed by millions of computers throughout the world known as miners. This network of computers plays the identical function as the Federal Reserve, Visa, and Mastercard, but using a couple of important differences. Like the Federal Reserve, Visa, and Mastercard, bitcoin miners record transactions and assess their accuracy.
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When someone makes a purchase or purchase using bitcoin, we call that a transaction. Transactions made in-store and online are documented by banks, point-of-sale methods, and bodily receipts. Bitcoin miners achieve the exact same effect without these institutions by clumping transactions together in cubes and adding them into a public document called the blockchain. .
When bitcoin miners put in a new block of transactions to the blockchain, part of the job is to ensure that those transactions are accurate. (More on the wonder of how this happens in a second) In useful site particular, bitcoin miners make certain that bitcoin are not being reproduced, a unique quirk of electronic currencies called double-spending.
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Once you spend $20 at the shop, that invoice is in the clerks hands. With electronic currency, however, it's a different story. .
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When the numbers were identical, the clerk could know the money had been duplicated. This analogy is similar to what a bitcoin miner does when they verify new transactions. .
With as many as 600,000 purchases and sales occurring in a single day, nevertheless, verifying every one of those transactions can be a great deal of work for miners, which gets at one other crucial difference between bitcoin miners and the Federal Reserve, Mastercard, or Visa. As compensation for their efforts, miners are given bitcoin whenever they add a new block of transactions to the blockchain.
In 2009, it find here had been 50. In 2013, it had been 25, in the time of writing it is 12.5, and sometime in the center of 2020 it will halve to 6.25. .
At this speed of halving, the entire number of bitcoin in circulation will approach a limit of 21 million, making the currency more scarce and valuable over time but also more expensive for miners to make.
Here is the catch. In order to get bitcoin miners to actually earn bitcoin from verifying transactions, two things have to occur. First, they need to confirm 1 megabyte (MB) value of transactions, which can technically be as small as 1 transaction but are far more often a few thousand, depending on how much information each transaction stores.