According to a news report at 12 o'clock noon on the 26th, EDT, "Facebook is releasing the ban on digital cryptocurrency advertising developed by the company in January this year. Advertisers are required to be reviewed before placing advertisements, and related to the issuance of first-time tokens ( ICO) related ads are still prohibited."
      Allowing cryptocurrencies to advertise on Facebook is, on the surface, a relatively loose policy for cryptocurrencies, a friendly behavior, and a sense of cryptocurrency support. But is it really the case?

      At the beginning of Facebook’s initial development of digital cryptocurrency advertising bans, cryptocurrencies were in a madly rising trend. For example, Bitcoin’s price had already exceeded 20,000 US dollars at the time, but due to lack of supervision, fraudulent acts often occurred. So Facebook made a ban on cryptocurrencies. Google also implemented a ban afterwards.
      But in my opinion this is not the main reason, because in addition to the cryptocurrency, facebook and Google also promote gambling sites in other aspects. In terms of fraud, both cryptocurrency and the gambling industry exist. So why only restrict the cryptocurrency?
      We return to the original question. Is Facebook's partial lifting of the ban on confidential currencies its support and goodwill? I think on the contrary, when there was news speculating that Facebook and Google would issue their own cryptocurrencies, combined with the growth trend of the price of Bitcoin at that time, I had every reason to believe this speculation. Since Facebook and Google plan to issue their own cryptocurrency, how could they also advertise on other platforms for other cryptocurrencies?
      Recently, the cryptocurrency market can be said to be very bad. In bitcoin terms, once worth more than 20,000 US dollars, it fell to below US$5,000 directly last week. Other cryptocurrencies have also been affected by this trend, and almost all have appeared. Different degrees of decline.
      For this phenomenon, perhaps Facebook has lost confidence in the cryptocurrency market. Once the cryptocurrency is not issued, there is no such thing as a competitor. This explains why Facebook is going to lift the ban on cryptocurrency advertising.
      (Above, it is a purely personal opinion and only serves as a reference for the analysis of this phenomenon.)

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EOS provides accounts, authentication, databases, asynchronous communications, and program scheduling on hundreds of CPUs or clusters. The final form of the technology is a blockchain architecture, which can support millions of transactions per second, while the average user does not have to pay for the use.

EOS tokens do not have any rights, uses, uses, attributes, functions or characteristics, expressions or hints, including no restrictions, any uses, uses, attributes, functions, or features on the EOS platform. The release of any EOS platform will be conducted by members of the community that are not related to the block. Third parties that launch the EOS platform can delete, modify, or supplement EOS. IO software released before, during, or after the EOS platform.[/color][/size]

Cardano (ADA) origin Cardano is the IOHK team led by Charles Hoskinson. The new generation of blockchain smart contract platform was officially released in September 2017. Charles Hoskinson was a co-founder of ETH and became IOHK in 2015, focusing on the development of Cardano. After two years of research, he successfully released Cardano. As of today (April 29, 2018), Cardano ranked sixth in market capitalization, with a total market value of 9.7 billion dollars. Cardano can be said to be a basic chain that has a lot of highlights, proposes a lot of directions to solve the problem, and indeed has the potential to become the leader of the 3.0 blockchain era. The following "punk" gives you a good analysis of Cardano's mechanism and design. Second, the characteristics of Cardano Cardano one of the biggest features is its hierarchical ideas. In previous articles of "Punk", "Bitcoin Detailed 3.0 - Redemption of the Blockchain" mentioned some solutions to the problem of btc, including eth congestion, one of the most promising ways is stratification. Although there were already some other underlying concepts of layering before ada appeared, ada was the first to clearly define the concept of layering and took the basic chain of a particularly substantive plan. . In the existing blockchain 1.0 or even 2.0 architecture (such as Bitcoin, Ethereum, etc.), various operations, whether trading, running code, or executing smart contracts, are mixed. Completed together. In addition, for example, ETH, in the process of executing a smart contract, a large amount of data that needs to be uploaded corresponds to a large amount of processing fees, and consumes a large amount of resources that should be used to process transaction data. This is actually very unfavorable for smart contracts. Therefore, the hierarchical logic is to complete different operations in different layers. The layers interact with each other via interfaces. Each layer is also a blockchain or multiple blockchains. This can greatly improve the overall TPS capabilities, and through the distinction of the functions of each layer, the processing power and the processing efficiency and capability of the program can be extended, and the corresponding cost (cost) can be reduced. In addition, the isolation between layers can make the security even more enhanced. Even if there is a problem with the previous layer, it will not affect the security of the next layer. Cardano is a platform that is divided into a computing layer and a settlement layer. The computing layer is a platform for the operation of smart contracts, and the settlement layer is a platform for transaction processing and recording. This can greatly release the efficiency of the computing layer and reduce costs, and ensure that the processing of the transaction is still in a high degree of security. In addition to layering the Haskell language, another highlight of Cardano is that it uses the Haskell language. This is a more advanced and modern language that also contributes to the development of the dapp ecosystem on it. Third, Cardano's consensus mechanism Cardano's consensus mechanism uses a POS (proof of stake) algorithm called Ouroboros. First, "punk" first introduces the POS mechanism. You should already know the POW's algorithm. That is, all participating bookers participate in the competition through their own work, and the probabilities that are proportional to their arithmetical power obtain the right to book and the corresponding benefits. The two major problems of POW are: 1. Waste of resources, because everyone is competing through computational power, but computing power has no other practical use other than to seize the right to record, so it will cause a lot of waste of power and resources. 2. Inefficient, and because of the nature of competition, the pure POW algorithm (allowing everyone to participate in billing), in order to achieve consensus, will not be able to enhance the overall TPS, which is a constraint to become a complete smart contract platform . Therefore, many people propose a POS mechanism that does not use accounting to compete for billing, but assigns a billing right with a corresponding probability based on each person's Stake (ie token or coin). Some POS mechanisms directly match the corresponding probability based on the amount of tokens held. Some POS mechanisms match the corresponding probability based on the number of tokens held* the number of days the token is held (ie, currency days). Therefore, all open access to all accounts, and based on existing chips, rather than the need to provide a mechanism for the workload, can be regarded as a POS consensus mechanism. POS can solve the core problems of previous POWs: 1. It does not consume resources; 2. It can improve TPS to a certain extent; but the biggest problem with POS is its natural Matthew effect. If we say that POW is a mechanism for distribution according to work, POS is a mechanism based on capital allocation. Therefore, the biggest potential problem for POS is that people who have more wealth (chips) will have more and more money, and poor people will become poorer and poorer. In addition, one of the hidden dangers of the early POS mechanism is that malicious attacks on the system require additional costs, and as long as the currency is held, an attack can be launched at no additional cost. However, in the later various new POS mechanisms, a number of penalties have been set up for malicious purposes, so as to prevent this from happening. Cardo's Ouroboros consensus mechanism is precisely a POS mechanism. The consensus mechanism compared to other POS mechanisms is characterized in that it is published through academic papers and is an absolute security consensus mechanism that has been rigorously demonstrated in the academic field. However, most of the current consensus algorithms are only published through white papers. Not widely proven academically. The following is a brief description of Ouroboros consensus mechanism. Cardano's system will internally set up a slot. At a certain time interval, a slot leader is randomly selected. The probability that the owner will obtain the billing rights and the amount of ADA he holds In proportion (for example, if A holds 1% of the total amount of Ada, then it will have a 1% probability of getting bookkeeping rights). After the bookkeeper completes the packaged work, he can get the corresponding fee. This model not only has various advantages of POS, for example, it does not consume electricity and a large amount of calculation power. At the same time, because it is randomly selected by the system, it is not easy to produce a malignant bifurcation. In addition, Cardano and its consensus mechanism have more highlights. Fourth, scalable capabilities, cross-linking capabilities and sustainable development capabilities In addition to layering, Cardano is also promoting the realization of the three major capabilities: the ability to scale, interactive and sustainable development. The following "Punk" will start to explain. The scalability can first be scaled to represent whether it can carry the ability of a large number of dapps to run. This can be refined into three indicators: TPS, bandwidth, storage space. And Cardano has been optimized on these three indicators to ensure that it can become a perfect smart contract and dapp platform. The first is TPS. There are two main ways that Cardano promotes TPS. 1. In the consensus mechanism, there will be one block per slot, and if the slot is shortened, the speed of the block can be increased and the TPS can be improved. 2. Cardano supports parallel processing. Multiple blocks can be used at the same time to increase the bandwidth. Because dapp may involve a large number of downloads and transmissions, the bandwidth requirement is high. Cardano will use a RINA (Recursive InterNetwork Architecture) technology to solve the bandwidth problem. The network is divided into a large number of small networks, a large number of data transmission is only completed within the small network, only the data related to the cross-network will be transmitted externally, thus the capacity of the entire system's bandwidth is greatly improved. This processing mode has some similarities with ETH's fragmentation. In terms of storage space, due to the small amount of currently stored data, no specific processing method has been implemented yet. It is expected that in the second half of 2018 to 2019, technologies such as compression and partitioning will be used to increase the efficiency of the use of storage space. Interoperability Interoperability is mainly represented by cross-chain capabilities. Cardano hopes to build an Internet of Blockchain so that cross-chain transactions and information can be formed between the chain and the chain. In this regard, Cardano is currently focusing on promotion. Sustainability The problem with many current blockchain projects is that they only fund ICOs. Once the funds from the ICO have been exhausted, the development of the project's technological development and business development will be limited. Even systems such as Windows and Android require constant updates and iterations, which means that there will be a constant source of funding. Therefore, any mature system should consider the issue of sustainable development. And Cardano's solution to this problem is that each transaction fee will flow into the Cardano Foundation from a very small part. The money will be used for the sustainable development of the community, and the use of funds will be determined and distributed by the entire community. V. Cardano's Token economics The total amount of Ada coins is 45 billion, of which 30 billion are pre-generated, 25 billion are used for ICO, and 5 billion are reserved for development by the Cardano team. The remaining 15 billion will be generated during the subsequent POS mining. Ada's token setting is a combination of pre-digging and mining. It is possible to use the pre-excavated currency for ICO to obtain funds, and to encourage users to participate in the community through mining and follow-up to enhance their enthusiasm. VI. Summary and Prospects Cardano can be said to be a very perfect bottom-line chain. Its very rigorous style, through the first publication of academic papers, to obtain proof, and then start the idea of ​​doing things worthy of all teams to learn. I hope Cardano can go further and further.

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