How are Transactions Confirmed on the Blockchain?
You might remember how I explained earlier that the blockchain is decentralized, meaning that no single authority has control over the network. This also means that the blockchain does not need a third party intermediary to confirm a movement of funds.
If that’s the case, how are transactions confirmed? This is where things get really interesting!
The blockchain is a community-based platform, meaning that in most cases, anybody can contribute to the network to help verify transactions. They do so by contributing their computational power, which in return, is able to support the network.
Not all blockchains use the same technology to do this, but we differentiate the process by how the network reaches “consensus”. Consensus basically means “How does the network know that the transaction is valid and that the user actually has the funds available?”
Blockchains reach consensus by following the rules of “cryptography”, which is where the term “cryptocurrency” comes from. Cryptography is a really advanced area of mathematics that is based on algorithmic puzzles.
When the blockchain and its community of volunteers are able to solve the algorithmic puzzle, the rules of cryptography state that a transaction is valid and authentic. However, different blockchains use different methods to solve the puzzle, which is known as a “consensus mechanism”.
Confused? Don’t be, as my “What is blockchain” guide is now going to give you an example!
The blockchain Bitcoin uses is supported by a consensus mechanism called “Proof-of-Work” (PoW). The puzzle is so difficult that no human being could solve it on their own, which is why people need to use their computational power instead.
Every computer that is connected to the network (called a “Node”) attempts to solve the puzzle as quickly as possible. Whoever solves the puzzle first, gets a reward – free, new Bitcoin. However, in reality, the Bitcoin reward is not free, as the user had to use their surplus computational power, which consumes lots of electricity!
PoW is just one example of how a blockchain reaches consensus. There are many others and I have listed some of them below (there are lots more)!
PoS (Proof of Stake)
DPoS (Delegated Proof of Stake)
PBFT (Practical Byzantine Fault Tolerance)
DAG (Directed Acyclic Graph)
Are you still asking yourself “What is blockchain”? I hope not! The next part of my blockchain tutorial is going to talk about why decentralization is important!
In this section, we will discuss how Satoshi Nakamoto innovated on top of existing open allocation governance processes in order to make them robust enough to govern a currency system.bitcoin hunter registration bitcoin captcha bitcoin bitcoin сервисы bitcoin vector
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In the previous example, suppose Carl sends $100 to Ava via bank transfer. In this scenario, it is the bank’s job to make sure that Carl has enough balance to make the $100 payment to Ava. After the bank confirms this transaction, they make a record of it so that it can be referred to in the future.ethereum supernova фото bitcoin обсуждение bitcoin armory bitcoin перспективы bitcoin bitcoin перевести gold cryptocurrency обмен monero bitcoin анимация курс tether cpuminer monero ethereum stratum bitcoin skrill bitcoin опционы обновление ethereum bitcoin торги multi bitcoin monero хардфорк keepkey bitcoin создатель ethereum bitcoin курс bitcoin суть форумы bitcoin bitcoin crush demo bitcoin ethereum asics bitcoin bitrix difficulty bitcoin bitcoin biz bitcoin legal ethereum рубль ethereum ios bitcoin sportsbook homestead ethereum ethereum transaction bitcoin services bitcoin bounty bitcoin satoshi The main practical significance of these different algorithms is their impact on the process of 'mining' new coins. In both Bitcoin and Litecoin, the process of confirming transactions requires substantial computing power. Some members of the currency network, known as miners, allocate their computing resources toward confirming the transactions of other users. In exchange for doing so, these miners are rewarded by earning units of the currency which they have mined.joker bitcoin To the IRS, bitcoins are considered and are taxed as property.unconfirmed bitcoin
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