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Insteadthey went with Solution 2. The resulting currency, called bitcoin money, increased the blocksize to 8 Mb in order to accelerate the verification procedure to permit a performance of around 2 million transactions every day. In the time of writing, Bitcoin Cash is valued at $545.00 to Bitcoins $6,328.11.
When you hear bitcoin mining, you envisage coins being dug out of the ground. However, bitcoin isnt bodily, so why do we call it mining
Since its like gold mining in that the bitcoins exist in the protocols design (just as the gold is underground), but they havent been introduced 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 do so as a reward for creating cubes of confirmed transactions and including them in the blockchain.
Backtracking a bit, lets talk about nodes. A node is a powerful computer which 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 leave a certain port open (the downside is the fact that it consumes energy and storage space the network at time of writing carries 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.. That 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 blocks and add them to the blockchain. How can they do so by solving a complex mathematical mystery that's part of the bitcoin app, 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's within a certain range.
(For trivia lovers, this number is known as a nonce, which is a concatenation of number used once. In the case of bitcoin, the nonce is an integer between 0 and 4,294,967,296.)
How do they find this number By guessing at random. The hash function makes it impossible to forecast exactly what the output will be. So, miners suppose the puzzle number and apply the hash function to the combination of the guessed number and the data in the block. The resulting hash has to start with a pre-established number of zeroes.
Whats more, there might be several nonces that produce the desired result, or there may be none (in which case the miners keep trying, but using a different block configuration). .
The first miner to get a resulting hash within the desirable like this range announces its success to the remainder of the network. All the other miners immediately stop work on that block and begin trying to figure out the mystery number for your next one. As a reward for the work, the victorious miner has some new bitcoin. .
In the time of writing, the payoff is 12.5 bitcoins, which in time of writing will be worth nearly $200,000.
Though its not nearly as cushy a bargain as it sounds. There are a lot of mining nodes competing for this reward, and it's a question of luck and computing power (the further guessing calculations you can perform, the luckier you are).
Also, the expenses of being a mining node are considerable, not only due to the effective hardware needed (if you've got a faster processor than your opponents, you have a better chance of finding the correct number before they perform ), but also because of the large amounts of power that running these chips 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 value of bitcoin relative to price of electricity and hardware could go up during the next few years to partially compensate this reduction, but its not certain. .
The difficulty of the calculation (the necessary number of zeroes at the beginning of the hash string) is corrected 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 has been attained (expected some time in 2140).