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Instead, they 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 permit 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 bodily, so why do we call it mining
Since its like gold mining in that the bitcoins exist in the protocols design (like the gold is underground), but they havent been brought out into the mild yet (like the golden hasnt 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 cubes of validated 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 keep bitcoin running by participating in the relay of information. Anyone can run a node, you just download the bitcoin applications (totally free ) and also leave a certain port open (the downside is 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, who will relay the information to nodes that they know, etc.. This way it ends up getting around the entire network fairly quickly. .
Some nodes are mining nodes (usually referred to as miners). These group outstanding transactions into cubes and add them into the blockchain. How can they do so by solving a complex mathematical mystery that is a portion of this bitcoin program, and including the answer in the cube. The puzzle that needs solving is to find a number which, when combined with the information in the cube and passed via a hash function, produces a result that is within a certain range.
How can they find this number By guessing at random. The hash function makes it impossible to predict what the output will be. So, miners suppose the puzzle number and use the hash function to the combination of that guessed number and the data in the cube. The resulting hash must start with a pre-established number of zeroes.
Whats more, there may be several nonces that produce the intended 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 desirable range announces its success to the rest of the network. All the other miners immediately stop work on that block and start trying to figure out the puzzle number for the next one. As a reward for the own work, the victorious miner gets some new bitcoin. .
In the time of writing, the reward is 12.5 bitcoins, which in time of writing is worth almost $200,000.
Additionally, the costs of being a mining node are considerable, not only due to the powerful hardware needed (if you've got a faster processor than your competitors, you've got a better chance of finding the correct number before they perform ), but also because of the large amounts of power that running these processors consumes. .
And, the number of bitcoins awarded as a reward for solving the puzzle will decrease. Its 12.5 now, but it halves every four years or so (the next one is anticipated in 2020-21). The value of bitcoin relative to price of electricity and hardware could extend up over the next few decades to partially compensate this reduction, but its not certain. .
The problem of this calculation (the required number of zeroes at the beginning of the hash string) is corrected frequently, so that it requires on average about 10 minutes to process a block.
Why 10 minutes That is the amount of time the bitcoin developers think is necessary for a continuous and diminishing flow of new coins until the maximum number of 21 million is attained (anticipated some time in 2140).