Number of Ethereum transactions
Ethereum is the next generation of cryptography ledger. It intends to support many advanced functions, including user issuing currency, intelligent protocol, decentralized transaction and what we think is the first fully decentralized autonomous organization (Daos) or decentralized autonomous company (DACS) application
Ethereum does not specifically support every single type of function as a feature. On the contrary, Ethereum includes a built-in Turing complete scripting language, which allows you to write code for the feature you want to implement through a mechanism called "contract". A contract is like an automatic agent. Every time a transaction is received, the contract will run a specific code, which can modify the data storage inside the contract or send the transaction. Advanced contracts can even modify their own code
Ethereum was launched on November 1, 2015, and launched on August 22, 2016 on bitcoin trading platform, a well-known domestic trading platform; 30-¥ About 60, current: ¥ 1259.97, the rise is amazing
Ethereum is likely to rise to 10000 in 2021
institutional investors and big capital are increasingly interested in cryptocurrency. The attention of all whales, and the attention of all the public, is focused on bitcoin. Since the global health and safety incident triggered the market crash in March 2020, the growth of eth has reached 1200%
while BTC only increased by 700%. Of course, in the context of bitcoin's record high price of 40000, Ethereum's rise to $1400 does not seem so impressive. In addition, the market value of eth is five times the trading volume of BTC market
extended information:
the increase of Ethereum is as follows:
the transaction volume recorded on Ethereum blockchain exceeds US $1 trillion. These figures exceed the transaction volume of payment giants such as PayPal, which is used by more than 350 million users and whose average transaction volume is generally less than $200 billion per quarter
each transaction will generate network fees paid by eth. Moreover, as the growth rate of the network is still very high, we can confidently expect the "bull market" trend of eth to continue. In any case, interest in cryptocurrency is growing, as are the number of active wallets, the number of transactions on the Internet, and the average size of transactions
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 />}); Pre >
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
how many years can the ether coin be g
how many Ethernet coins can be proced each year? At present, five new ether coins are generated for each new block. If you dig out a block every 14 seconds, it will take 31.5 million seconds (365 x 24 x 60 x 60) a year, which means that 2.25 million blocks are g out every year
every miner has considered how long the ether coin can be g, whether I can't dig the ether coin after I buy the miner, or I can't dig the ether coin after I invest in the miner. I can tell you clearly that the ether coin can't be g up, and the official shows the quantity when it comes to the ether coin, but don't go, Ethernet currency is constantly bifurcating. Once the quantity is threatened, it will continue to bifurcate. The miners can continue to dig for new currencies from the bifurcations. For example, etc and ETF are examples. After the bifurcations, the ETH price will go up crazily. Therefore, miners need not worry about the quantity of Ethernet currency.
some contemporary developmental psychology theorists and researchers have developed Piaget's views on children's cognition and put forward various stage models to describe the development of children's view taking ability. There are mainly two theoretical models:
Flavell divides a series of cognitive psychological actions that occur when children adopt opinions into four stages according to the order of occurrence: 1. Cognitive evaluation of others has the possibility of different views (attitude, knowledge, etc.) from their own. Children realize that people have different views on a certain event or situation. 2. Need stage. Children realize that it is necessary to infer the opinions of others in order to achieve their goal of interpersonal communication, persuade others and win in the game. 3. Inference stage. The cognitive activities in this stage include all psychological activities except perception. The purpose of these activities is to infer the views of others in a particular situation, that is, character characteristics. 4. Application stage. Indivials apply their inferential information to subsequent behaviors, such as what to say and how to say to others
Salman used the dilemma story of "Holly climbing the tree" to study children's perspective taking ability. According to the children's reaction, Selman divides the development of view taking ability into five stages: stage 0: egocentric view taking. Children cannot distinguish between their own interpretation of events and what they believe to be true or correct. Stage 1: social information perspective selection (about 6-8 years old). Children are aware that others have different understandings and opinions. Stage 2: self reflective viewpoint selection (about 8-10 years old). Children realize that everyone knows that others have their own thoughts and feelings. They not only know that others have different views, but also can be aware of others' views. Stage 3: mutual viewpoint selection (10-12 years old). Children can view the interaction of two people from the perspective of a third party and a common friend. Stage 4: viewpoint selection of social and custom system (over 12-15 years old). Children recognize that there is a comprehensive view, and also recognize that "in order to accurately interact with others and understand others, each self should consider the common view of the social system."