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Insteadthey went with Solution 2. The resulting currency, called bitcoin cash, increased the blocksize to 8 Mb in order to accelerate the verification procedure to permit a performance of around 2 million transactions per day. In 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 from 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 mild yet (just as the golden hasnt been awakened ). 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 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 simply download the bitcoin software (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 carries up about 145GB).

One node will send information to a few nodes that it knows, who will relay the information to nodes 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 set outstanding transactions into blocks and add them into the blockchain. How can they do this By solving a intricate mathematical mystery that is part of the bitcoin program, and including the answer in the block. The mystery that needs solving is to find a number which, when combined with all the his explanation data in the cube and passed through a hash function, creates a result that is within a certain range.

(For fiction fans, this number is called a nonce, which can be a concatenation of number used once. In the instance of bitcoin, the nonce is an integer between 0 and 4,294,967,296.)

How can they find this number By guessing at random. The hash function makes it impossible to forecast what the outcome will be. So, miners guess the puzzle number and apply the hash function to the combination of the guessed number and the information in the block. The resulting hash has to begin with a pre-established number of zeroes.

Whats more, there may be several nonces that produce the desired result, or there may be none (in which case the miners keep trying, but with 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 stop work on that block and begin trying to find out the mystery number for the next one. As a reward for its own work, the victorious miner has some new bitcoin. .

At the time of writing, the reward is 12.5 bitcoins, which at time of writing is worth almost \$200,000.

Although its not nearly as cushy a bargain as it sounds. There are a whole lot of mining nodes competing for that benefit, and it's a question of luck and computing power (the more guessing calculations you can execute, the luckier you are).

Also, the costs 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 do), but also due to the large amounts of electricity 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 this content 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 adjusted frequently, so that it takes on average approximately 10 minutes to process a block.

Why 10 minutes That is the amount of time that the bitcoin programmers think is necessary for a continuous and diminishing flow of new coins until the maximum number of 21 million is attained (expected some time in 2140).