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So that will make our inputs 256 element boolean vectors. We well want to preprocess the SHA256 strings, into binary (Boolean) vectors, as each bit is statistically independent, thus each bit is a good feature.

imageZK-Rollup หรือ Zero Knowledge Rollup คือ Layer 2 ประเภทหนึ่งที่ Blockchain ของมันทำงานร่วมกันกับ Ethereum Chain หลัก (On-chain) แต่ภายใน ZK-Rollup จะไม่สามารถนำแพลตฟอร์มหรือ DApps ที่รันอยู่บน Ethereum Chain มาใช้งานภายใน Blockchain นี้ได้ (ใช้ EVM ไม่ได้) สรุปแบบง่ายๆก็คือ ZK-Rollup จะไม่สามารถใช้ EVM ได้ และเป็น On-chain นั่นเองครับ.

If you want to know what is Bitcoin, then you should have a clear idea of how to store it. A popular phrase that crypto investors have is "not your keys, not your Bitcoins." This is why we will explain to you which are the most useful and safe ways to store Bitcoin and other virtual currencies. Storing Bitcoin is one of the most important topics in the cryptocurrency market.

The demand for electricity increases rapidly along with the advancement of the industrial age. The concept enables a small, individual scale to generate electricity and sell it to the grid. This paper proposes the blockchain as a tool to manage transactions in the smart grid. The blockchain provides immutability of the transactions, which ensure every transaction between generators and BNB consumers will always be executed. Transactions are performed with smart contracts, and the network acts as a transaction verifier. It also provides immutability to transaction history, which can be used for audit or solving a transaction dispute. To ensure efficient distribution of the electricity, maintain low losses and high level of quality, and the security of electricity supply, the smart grid concept was proposed. However, the concept adds complexity to the existing system, such as how a transaction between these generators and consumers are conducted, verified and recorded.

พูดถึงข้อที่เหมือนกันก่อนครับ โดยทั้ง Ethereum 2.0 และ Ethereum Layer 2 มีจุดประสงค์เดียวกันคือ ต้องการการรองรับธุรกรรมที่มากขึ้น ค่าธรรรมเนียมการทำธุรกรรมที่ถูกลง และการใช้งานที่มีประสิทธิภาพมากยิ่งขึ้น.

ซึ่งวิธีการบันทึกธุรกรรมของ ZK-Rollup จะเหมือนกับ Optimistic Rollup เลยครับ มัดรวมธุรกรรมเอาไว้เยอะๆ แล้วส่งไปบันทึกใน Etherem Chain ที่เป็นเครือข่ายหลักทีเดียว ลตต้นทุน ลดเวลา เหมือนกัน.

That's also the definition given in the answer, cryptocurrency which is what I objected to. I only knew the meaning as a function that's surjective but not bijective. $\begingroup$ @user2357112 Thanks, I didn't know that.

Among the laggards is Binance, which is the world’s largest exchange and responsible for a significant amount of block space, according to Cointelegraph, citing a report from Glassnode. The report said that unless large players like Binance get onboard, the Bitcoin network will struggle to fully scale. The SegWit upgrade was a "soft fork" — i.e., compatible with the older software — that most exchanges had adopted by 2019.

At first glance it does appear to be impossible, but I would like to know what algorithm and approach to take to test this hypothesis. $\begingroup$ "unlikely" and "should" - Thats what the algorithm will tell me.

So the difficulty increases and you have to try many many possibilities for the nonce to match the required pattern by difficulty target. One of the miners will succeed in finding the right nonce and therefore constructing the correct header.

As collateral effect new bitcoin are issued by the coinbase transaction in favor of the miner discovering the right nonce creating an economic incentive for mining. Bitcoin mining is the procedure where miners verify the transactions and add them to a new candidate block. When a nonce which makes the blockhash matching the required pattern is found, the block is validated and propagated across the whole network and added to the chain.

So the miner builds the candidate block , puts the transactions from the mempool inside the block, adds additional informations (timestamp, cryptocurrency etc). Then it adds a nonce and calculates the header hash and checks if the desired pattern is matching (the target). The chances that the resulting hash is starting with zeros is decreasing the more zeroes must be present at the beginning of the number; this is due to the difficulty.image

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