Query CDAC on Ethereum official website

1. Ethereum is registered in the United States

2. It's really not easy.

3.

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

4. 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.

5. Ethereum browser's website is etherscan.io, you can query Ethereum related details. At present, the exchanges that can trade Ethereum mainly include: coin an, fire coin, bitnet, etc.

6. We can do more. When you feel that the contract is going to rise, you should buy long (open the position). When the contract is going to rise to the psychological price, you should sell and close the position. The price difference is profit. Shorting means selling and opening the position. When you feel that the contract is going to fall, you should short (open the position). When the contract is going to fall to the psychological price, you should buy and close the position
spot can also be long, short, the threshold of stock index futures is too high
spot is simpler than stock index futures and stocks. You can buy up, buy down and sell as you buy. Now the stock market is not easy to operate, investors have turned to the spot market
it is a 24-hour trading mode, t + 0 mode, which can be carried out at any time
two way profit, buy up buy down can be, compared to the stock is easier to operate, stock only up to earn
with 50 times leverage, assets can be effectively enlarged, and it can be operated with more than 10000 investment. Very good.

7. Short trading is unique to futures trading. But the stock shorting is refers to through the related stock index futures to make the short transaction, itself stock cannot make the short.

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.

9. You pay to push the price limit is a fraud company, under the banner of Galaxy Securities to cheat money, note that securities companies will not easily recommend stocks.