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Insteadthey went with Solution 2. The resulting currency, known as bitcoin money, increased the blocksize to 8 Mb in order to accelerate the verification procedure to allow a performance of around two million transactions per day. At the time of writing, Bitcoin Cash is valued at $545.00 to Bitcoins $6,328.11.
When you hear about bitcoin mining, you envisage coins being dug out of the ground. But bitcoin isnt physical, so why do we call it mining
Because its similar to gold mining in the bitcoins exist in the protocols design (like the gold exists underground), but they havent been brought out into the light yet (like the golden hasnt been awakened ). The bitcoin protocol stipulates that 21 million bitcoins will exist at some point.
They get to perform so as a reward for creating blocks of confirmed transactions and including them in the blockchain.
Backtracking a bit, lets talk about nodes. A node is a powerful computer that runs the bitcoin software and assists to keep bitcoin running by participating in the relay of information. Anyone can run a node, you just download the bitcoin software (totally free ) and also leave a certain port open (the downside is the fact that it consumes energy and storage space the network at time of writing takes up about 145GB).
One node will send information to a few nodes that it knows, that will relay the information to nodes that they know, etc.. That way it ends up getting around the whole network fairly quickly. .
Some nodes are mining nodes (usually referred to as miners). These set outstanding transactions into cubes and add them to the blockchain. How can they do this By solving a complex mathematical mystery that is part of this bitcoin program, and including the answer in the block. The mystery that needs solving is to find a number that, when combined with the information in the block and passed via a hash function, creates a result that is within a certain range.
How can they find this number By guessing at random. The hash function which makes it impossible to forecast what the output will be. So, miners guess the puzzle number and apply the hash function to the combination of that guessed number and also the information in the block. The resulting hash must start with a pre-established number of zeroes.
Whats more, there might be several nonces that make the desired result, or there might be none (in the event the miners keep trying, but with a different block configuration). .
The first miner to get a resulting hash within the desired range announces its victory to the remainder of the network. All the other miners immediately cease work on that block and start trying to find out the puzzle number for the next one. As a reward for the work, the victorious miner has some new bitcoin. .
At the time of writing, the payoff is 12.5 bitcoins, which in time of writing is worth almost $200,000.
Also, the expenses of being a mining node are considerable, not only because of the powerful hardware needed (in case you've got a faster processor than your competitors, you've got a better chance of finding the right number before they do), but also due to the large amounts of electricity that running these processors consumes. .
And, the number of all bitcoins awarded as a reward for solving the mystery will decrease. Its 12.5 now, but it pits each four years or so (the next one is expected in 2020-21). The worth of bitcoin relative to cost of electricity and hardware could extend up over the next few decades to read this post here partially compensate this reduction, but its not certain. .
The problem of the calculation (the necessary number of zeroes at the beginning of the hash string) is adjusted frequently, so it requires on average about 10 minutes to process a block.
Why 10 minutes that's the amount of time that the bitcoin programmers think is necessary for a continuous and diminishing flow of new coins until the highest number of 21 million is attained (expected some time in 2140).