Ethereum multi signature transaction tutorial

Publish: 2021-05-02 03:40:49

1. China bitcoin chbtc is the largest eth trading platform in China. Eth / BTC trading was launched on March 14, 2016, and it developed rapidly in just over a month. On April 30, the trading volume of eth / BTC had exceeded one million.

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.

Log in to the official website, click the "recharge" button on the top right of the page, in the [recharge withdrawal] mole, click [eth] - [eth recharge], select the default recharge account as [RMB spot account], check your recharge address, and then recharge through Ethereum wallet

expansion:

1. Ethereum is not an organization, but an underlying system that can realize intelligent contract and open source on the blockchain. From its birth to may 2017, Ethereum has more than 200 Ethereum applications around the world in just three and a half years. Ethereum is a platform and a programming language, which enables developers to build and release the next generation of distributed applications

Ethereum can be used to program, distribute, guarantee and trade anything: voting, domain names, financial exchanges, crowdfunding, corporate management, contracts and most of the agreements, intellectual property, and smart assets that benefit from hardware integration. On June 12, 2017, the price of Ethernet currency broke through $400, a record high. From $8 in February 2017 to $400 on June 15, 2017, the price of Ethernet currency has increased 50 times. At the same time, the price of bitcoin has eased, 10% lower than the previous peak, and the price of ether coin is much better; Take over & quot; Bitcoin continues to soar

6. 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

register a digital currency wallet, which can be used to store the digital currency of your transaction
register an account number on the currency exchange, where you can trade many types of digital currencies, such as bitcoin, Ethereum, EOS, etc
digital currency trading platform "currency exchange"

8. Just like a contract to buy bitcoin, you can choose, perpetual or delivery.

9. Return the result of ifconfig
eth0 to awk for processing
where - F & # 39;:|< br />+'
this is a separator defined by awk and then matched with "BCAST & quot;, Take the content of the fourth column
since your command is not universal, you can't output the result here, but you should intercept the broadcast address

Hot content

Inn digger Publish: 2021-05-29 20:04:36 Views: 341

Purchase of virtual currency in trust contract dispute Publish: 2021-05-29 20:04:33 Views: 942

Blockchain trust machine Publish: 2021-05-29 20:04:26 Views: 720

Brief introduction of ant mine Publish: 2021-05-29 20:04:25 Views: 848

Will digital currency open in November Publish: 2021-05-29 19:56:16 Views: 861

Global digital currency asset exchange Publish: 2021-05-29 19:54:29 Views: 603

Mining chip machine S11 Publish: 2021-05-29 19:54:26 Views: 945

Ethereum algorithm Sha3 Publish: 2021-05-29 19:52:40 Views: 643

Talking about blockchain is not reliable Publish: 2021-05-29 19:52:26 Views: 754

Mining machine node query Publish: 2021-05-29 19:36:37 Views: 750

Ethereum multi signature transaction tutorial

Related to Ethereum multi signature transaction tutorial