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Instead, they went with Solution 2. The resulting currency, called bitcoin cash, increased the blocksize to 8 Mb in order to accelerate the verification process to allow a performance of around two million transactions every 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 that the bitcoins exist in the protocols design (like the gold is underground), but they havent been introduced into the light yet (just as the gold hasnt yet been dug up). The bitcoin protocol stipulates that 21 million bitcoins will exist at some point.
They get to do this as a reward for creating blocks of confirmed transactions and including them in the blockchain.
Backtracking a little, lets discuss nodes. A node is a powerful computer which runs the bitcoin software and assists keep bitcoin running by participating in the relay of information. Anyone can run a node, you just download the bitcoin applications (free) and leave a certain port open (the downside is that it consumes energy and storage space the network at time of writing carries up about 145GB).
One node will send information to some nodes that it knows, that will relay the information to nodes they know, etc.. That way it ends up getting around the whole network fairly quickly. .
Some nodes are mining nodes (usually known as miners). These set outstanding transactions into blocks and add them into the blockchain. How do they do this By solving a complex mathematical mystery that's a portion of this bitcoin program, and including the answer in the cube. The mystery that needs solving is to find a number that, when combined with the data in the block and passed through a hash function, creates a result that's within a certain range.
How can they find this number By guessing at random. The hash function which makes it impossible to predict exactly what the output will be. So, miners suppose the mystery number and use the hash function to the combination of the guessed number and also the information in the cube. The resulting hash has to start with a pre-established number of zeroes.
Whats more, there might be several nonces that make the intended result, or there might be none (in which case the miners keep trying, but using a different block configuration). .
The first miner to acquire a resulting hash within the desired range announces its success to the rest of the network. The rest of the miners immediately cease work on that block and begin trying to figure out the puzzle number for the next one. As a reward for its work, the victorious miner gets some new bitcoin. .
At the time of writing, the payoff is 12.5 bitcoins, which at time of writing i thought about this will be worth almost $200,000.
Also, the expenses of being a mining node are considerable, not only due to the effective hardware needed (if you have a faster processor than your competitors, you have a better chance of finding the right number before they perform ), but also due to the large amounts of power that running these chips consumes. .
And, the number of all bitcoins given as a reward for solving the mystery will decrease. Its 12.5 now, but it pits each four decades or so (the next one is anticipated in 2020-21). The value of bitcoin relative to cost of electricity and hardware could go up during the next few decades to partly compensate this reduction, but its not certain. .
The problem of this calculation (the necessary number of zeroes at the beginning of the hash string) is corrected frequently, so it takes on average about 10 minutes to process a block.
Why 10 minutes That is the amount of time 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).