How to access Ethereum games

1. Eth interface refers to the interface, is the most widely used LAN communication mode, but also a protocol. Ethernet interface is the port of network data connection
each version of Ethernet has a maximum cable length limit (that is, the length without amplification). Signals within this range can propagate normally, and signals beyond this range cannot propagate
in order to allow the construction of a larger network, repeaters can be used to connect multiple cables. Repeater is a physical layer device, which can receive, amplify and retransmit signals in two directions
extended data
several common Ethernet interface types
1. SC optical fiber interface
SC optical fiber interface has been applied in the era of 100base TX Ethernet, so it was called 100base FX at that time (F is the abbreviation of optical fiber). However, at that time, because the performance was not more prominent than twisted pair, but the cost was higher, so it was not popularized. Now the instry vigorously promotes gigabit network, and SC optical fiber interface is re valued
2. RJ-45 interface
this kind of interface is the most common network equipment interface, commonly known as "crystal head", and the professional term is RJ-45 connector, which belongs to the type of twisted pair Ethernet interface. RJ-45 plug can only be inserted along the fixed direction, and a plastic spring piece is set to be stuck with RJ-45 slot to prevent it from falling off
3. FDDI interface
FDDI has the highest transmission rate among the mature LAN technologies. It has the characteristics of timed token protocol, supports a variety of topologies, and its transmission medium is optical fiber. Fiber distributed data interface (FDDI) is a set of protocols developed by American National Organization for Standardization (ANSI) to transmit digital signals on optical cables
reference source: Network Ethernet interface

2. curl方法，file_get_contents,

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. Through curl to simulate, and then get the data, and use it in JSON format

5. In theory, blockchain is not an innovative technology. It is more inclined to a new application mode that integrates distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. So technology will never be its focus, application mode is
at present, the fields closely combined with blockchain include finance (major banking institutions), digital assets (bumeng network), intelligent contract (Ethereum), etc. the game field is considered as one of the categories of digital assets in the instry, which will give birth to new scenarios and business opportunities
from the perspective of existing solutions or applications, the combination of game and blockchain technology mainly lies in two aspects: first, asset circulation; 2、 Platform
first, asset circulation, which is the main solution of bumeng in the game field. Virtual assets such as tokens in the game are regarded as digital assets and circulated based on blockchain, which has the advantages of more convenient circulation and lower cost. For example, some big game companies have 10 games. The game currency of these games is connected through blockchain technology. The gold coin of game a is still useful when it comes to game B. in this way, if the user of game a does not want to play game a, he may prefer to choose other games of the company because of the gold coin in game A. for the game company, It can better circle users. For users, it can ensure that their virtual assets will not be devalued, thus stimulating the transactions in the game. For small game companies, their user diversion is a high cost thing. If they unite to share the virtual assets in the game, they can attract users of other games

Second, platform, which is the decentralized E-sports platform on Ethereum - what the first drop of blood is doing now, is to solve the trust problem of the central platform based on the decentralization of blockchain technology, and use the smart contract to solve the reward payment problem. It is a bit similar to gambling. Compared with the current gambling platform, the rules are more open and transparent, and there is no problem of platform fraud. And with smart contracts, the process is simpler. Therefore, gambling and competitive games can be considered to cooperate with the blockchain platform
these two solutions are common in the field of blockchain, and there may be more solutions. You are welcome to discuss them with me in the comments area.

6. According to the requirements of the manual, first measure whether the red and green lines correspond to the L1 of the interface; Is the yellow and black line corresponding to L2? If so, it must be the correct connection. Although the telephone line can be divided into positive and negative poles, the terminals can be connected at will, so there is a rectifier directional circuit inside the telephone. Even if the L1 and L2 lines are wrongly connected, the equipment will not be burnt out, so you can safely and boldly test.

7. Generally speaking, undefined index is the exact writing problem in the process of writing. Notice generally prompts for errors that are not directly related to the execution of code, but don't forget that notice sometimes returns some rendant error information

8. General banks can exchange, but limited to Monday to Friday, I suggest you can go to Bank of China and Bank of communications, especially Bank of China, this business is very perfect, you can also use RMB to exchange US dollars in the future.