Ethereum market data interface

2. Fire coin net is very good.

3. You can check the market of Ethereum on non trumpet, but you can't trade it. The trend of Ethereum in the past two years can be described as from heaven to hell, with a very large decline. If you want to invest, you can go to the digital currency exchange. At present, the mainstream digital currency trading in the market includes coin security, fire coin network, bitnet, etc.

4.

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

5.

The price of eth is probably going up today

Ethereum is an open source public blockchain platform with smart contract function, which provides decentralized Ethereum virtual machine to process point-to-point contract through its special cryptocurrency ether (ETH)

the Ethernet system is the most widely used public blockchain system supporting complete application development. Compared with bitcoin, Ethereum belongs to the category of blockchain 2.0, which is a new blockchain system designed to solve some problems of bitcoin network. The design of bitcoin is only suitable for the scenario of encrypted digital currency, it does not have Turing completeness, and it lacks the concept of saving the real-time status of the account. Moreover, it has the problems of efficiency and resource waste caused by POW mechanism. Bitcoin's blockchain network has the defect of insufficient scalability

6. You can check the market of Ethereum on non trumpet, but you can't trade it. If you want to invest, you can go to the digital currency exchange. At present, all the mainstream digital currency transactions in the market are coin security, fire coin network, bitnet, etc.

7. Fire coin network, celletf, okex these can check, Ethereum recent development trend is not bad.