Ethereum fish pond query

1. The digital currency

issued based on Ethereum public chain should be observed according to the price trend of the platform.

2. The specific ranking is not clear, but the better ones are Xinghuo, Duomi, Yuchi, BW and so on. It is said that BW is good. It was established in 2013 and it is a well-known old mine

3. Generally, the selection of ore pool depends on the allocation mode, rejection rate and delay of ore pool. There are many kinds of income models, such as PPS, PPLNs, PPLNs + and so on. If you want to have long-term stable and high income, you can choose PPLNs model. If you do it for a long time, the income is much higher than PPS model. Of course, the lower the rejection rate and delay time, the better. Moreover, the stability of the mine pool, every three to five problems, it is certainly not OK. Comprehensive consideration can try AA mine pool, from all aspects are good
hope to be useful to you, please adopt!

4. 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.

5.

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

6. Just focus:
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.

7. With the blockchain browser, bitcoin has its own browser. Ethereum and bitcoin are both used. The token based on Ethereum can also be queried on Ethereum's blockchain browser, and usdt can be queried on bitcoin's blockchain browser

8. The withdrawal of digital currency generally only occurs on the digital currency trading platform. Where to withdraw cash? It is suggested to check the account number of the accounting platform carefully. It is generally in the personal center. The specific situation still needs to consult the official personnel, and the answer given by the official shall prevail. However, when choosing a digital currency trading platform, it is better to choose a big platform such as Xigu digital asset trading platform and bitcoin China.