How long does it take to confirm the 12 blocks of Ethereum
what is Ethereum:
Ethereum is an innovation based on the application of technologies and concepts in bitcoin to computers. Ethereum itself imitates a lot of bitcoin technology to maintain the computer platform. blockchain technology is one of them
Ethereum platform can safely run any program users want
advantages of Ethereum over other competitive currencies before Ethereum appeared, some digital currencies imitated bitcoin. However, these projects have their own shortcomings, they can only support one or several specific applications at the same time< However, the reason why Ethereum can surpass the limitations of these projects in the past is because of the core idea of Ethereum
what Ethereum wants to implement is a blockchain protocol with built-in programming language. Since it supports programming language, in theory, any blockchain application can be defined with this language, and then run on Ethereum's blockchain protocol as an application
The design of Ethereum is very flexible and adaptable
Ethereum target sets the advantages of blockchain technology, in order to add the advantages of blockchain, such as decentralization, openness and security, to almost all computing fields
blockchain applications of Ethereum
Ethereum has many blockchain applications, such as digital applications of gold and stocks, financial derivatives applications, DNS and digital authentication, etc
Ethereum has achieved more than 100 blockchain applications by many start-ups
Ethereum has also been closely watched by some financial institutions, banking consortia (such as R3), as well as large companies like Samsung, Deloitte, RWE and IBM. As a result, a number of blockchain applications such as simplified and automated financial transactions, merchant loyalty index tracking, and gift cards designed to achieve decentralization of electronic transactions have emerged
the relationship between Ethereum and blockchain:
Ethereum is a programmable blockchain
Ethereum does not give users a series of preset operations (such as bitcoin transaction), but allows users to create complex operations according to their own wishes
in this way, Ethereum can be used as a platform for various types of decentralized blockchain applications, including but not limited to cryptocurrency
like other blockchains, Ethereum also has a peer-to-peer network protocol. Ethereum blockchain database is maintained and updated by many nodes connected to the network. Each network node runs the Ethereum simulator and executes the same instructions. Therefore, people sometimes call Ethereum "world computer"
If you want to query the transaction records on the main network, you can use Etherscan. However, if you build your own private chain, how should you query the transaction records
the answer is that you need to listen to the logs on the chain, save them in the database, and then query them in the database. For example:
< pre t = "code" L = "Java" > varaddr = & quot& quot;< br />varfilter=web3.eth.filter({fromB lock:0 ,toBlock:' latest', address:addr });< br />filter.get(function(err,transactions){transactions.forEach(function(tx){
vartxInfo=web3.eth.getTransaction(tx.transactionHash);
/ / at this time, the transaction information txinfo can be stored in the database
})< br />});
Web3. Eth. Filter() is used to monitor the log on the chain, and Web3. Eth. Gettransaction() is used to extract the information of the specified transaction. Once the transaction information is obtained, it can be stored in the database for query
recommend a practical introction, you can see: Ethereum tutorial
you can't retrieve your assets through Ethereum block query
think too much
if you want to check the real estate,
you can go to the real estate transaction registration center.
"chainman College" offers short weekend technical training courses for colleges with a certain programming foundation. You can investigate them and ask about your situation.
the MLM currency of blockchain will collapse on the day when the capital chain breaks as the underlying technology of bitcoin, "blockchain" is like a distributed database ledger. With the price of virtual currency based on blockchain technology such as "bitcoin" soaring, ordinary investors are increasingly interested in blockchain and digital currency
Li Xuyang, head of Tencent's security and anti fraud laboratory, said that there are more than 3000 MLM platforms using the blockchain concept. The reporter's inventory of recent cases found that "blockchain + fraud" mainly has three "routines"
extended data
with the sharp rise and fall of bitcoin and the explosion of the concept of "blockchain", many pyramid schemes under the banner of "blockchain" also appear frequently
putting on the "new vest" of blockchain, the "old routine" immediately incarnates another "new shortcut" of "Chinese aunts" in pursuit of "financial freedom" and "big pits" worth hundreds of millions. Experts suggest that relevant departments establish a joint supervision and joint strike mechanism, improve the ability of risk investigation, and timely cool down the excessive speculation chaos of "blockchain"
Ha Yu miner, windows can mine with one click, and it hasn't pumped water yet. At the same time, they also have an app that can monitor your machine at any time
linux system can also mine, two-step setting can mine
Mining in two steps by Linux system
< UL >open the website, input the mobile phone number, select how many CPUs you want to use to mine, the default is to use 50% of the CPU to mine, click to generate your exclusive command and
is such a simple operation
BCH is a miracle in the mainstream digital currency, and has been recognized by the mainstream user groups at home and abroad. BCH may surpass Ethereum or even bitcoin in the future.