Ethereum transaction capture

1. For indivial investors, the realm kingdom with lower investment threshold is more suitable, because its entry threshold starts from $100, which is very low.

2.

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

3. With bitpie wallet, this is the largest bitcoin wallet in China. It can buy and sell bitcoin with one click, which is much more convenient than the exchange.

4. Note that Ethereum is 2.0 now. As of 13:57 on the 4th, the current deposit contract address of Ethereum 2.0 has received 1000098eth, and 31252 addresses have completed the mortgage of 32eth. With the increasing number of mortgage, the annual yield of mortgage will graally decrease. After the mortgage amount reaches 1 million eth, the current annualized yield is about 15.7%. Zhongyuan, a well-known exchange, has taken the lead in opening the mining channel of eth2.0 verification node, and then launched qeth. Users can invest their own eth in verification node mining and exchange qeth to obtain liquidity, and then participate in mining. Compared with the disadvantages of eth2.0, qeth has too many things: the liquidity is guaranteed, the user does not have to bear the technical cost, the threshold of participation does not need 32 eth as low as 0.1eth, the nodes are maintained by the platform, and the income is distributed according to eth2.0.

5. Gas & gt; ethestimateGas({ from:ethaccounts [1], to: ethaccounts[2], value:50000000000000 }) 21001 > Ethgasprice 2000000000, as shown above, shows this account [1] = & gt; The transaction of account [2] needs 21001 gas, and the current gasprice is 2000000000. How many gas does it take to send transaction / call contract method in Ethereum

6. Where are you going? Wallet or exchange
transfer eth, as long as there is an address, you can transfer it out
mnemonic words are things that you can help to find when you forget your key, not related to money collection.

7. What is the age of intentional injury? 14-16 if the victim is not seriously injured or died, he will not bear criminal responsibility
it is impossible for an aunt to take her to surrender herself to the crime of harboring. Of course, perjury may constitute the crime of shielding
according to what you said, it's still in the investigation stage. You find out that the case is handled by that branch or police station, and the person is in that branch or police station. It's not hard to find such a big person, is it
when the public security organ interrogates a minor, it is necessary to inform the guardian to be present. If you are not informed to be present, you can claim that the other party's means of obtaining evidence is illegal in the prosecution stage, and the confession obtained in this way should be excluded. That is, the court will not accept the evidence obtained by the other party
at present, it is only the investigation stage. You can consult the local lawyer or entrust a lawyer to provide legal help. To protect the legitimate rights and interests of children and aunts. I advise you not to be in a hurry. If the injury is not serious, you should not be sentenced. As long as there is no perjury, the aunt will come out after investigation. It's going to be fine.

8. Of course, it can be traded. The bitcoin and Ethereum g up are in their own wallets. They can control them at will and sell them to anyone they want
therefore, if a project tells you that they are going to lock the warehouse when they are g out, it's deceiving. It's not serious mining at all. Please be careful.