Technology Weekly｜Polkadot officially launched version v0.8.23 Filecoin main network may be launched in October

This week's Technology Weekly contains technical news related to Ethereum, Polkadot, COSMOS, Filecoin and other networks. The Ethereum 2.0 beacon chain "randomness" protocol proof has a loophole Golden Finance reported that ZenGo researchers have correctly disclosed the loopholes found in the Diogenes protocol proof. This proof is intended to provide raw entropy for the Verifiable Delay Function (VDF) of the Ethereum 2.0 Random Beacon Chain. According to a ZenGo blog post, Ligero Inc., the team behind Diogenes, is redrafting the protocol’s proofs to iterate on the vulnerability. According to ZenGo researcher Omer Shlomovits, VDF is necessary to build a truly secure random beacon chain. V God: The Ethereum EIP-2929 proposal may break some existing smart contracts. In order to reduce the soaring transaction fees of Contract fees have been tripled, and affected contracts include contracts that update the state of Ethereum, as well as some applications. But this repricing proposal may break some smart contracts that are already running on Ethereum, and approval of this proposal also requires the consensus of the Ethereum community, a process that may take weeks or months. Hengxin Dongfang: The company has explored or applied blockchain and other technologies: According to news on September 24, the person in charge of Hengxin Dongfang’s technology said that in the six supporting technologies of the metaverse—blockchain, interactive technology, AI, network and Computing, video game technology, the Internet of Things, etc., the company has explored or applied. [2021/9/24 17:03:22] Ethereum official blog: The Medalla testnet is progressing smoothly Jin Finance reported that the official Ethereum blog posted on September 1 that since the incident on August 14, the Medalla test The progress of the network is very smooth, there are currently 39,000 active-ethexc validators, and there are 12,000 more in the activation queue. The article emphasizes that client diversity is a must, and while there are many eth2 clients in active-ethexc development, the network is currently dominated by Prysm. The diversity of clients not only makes the eth2 consensus stronger, but also protects users in extreme cases. Additionally, the client team is working hard to ensure that switching clients is easy and safe. When a single client fails, easy-to-change software will allow the community to resolve the issue more quickly (e.g. the Medalla incident). The article also pointed out that one of the main goals of eth2 is to reach the 1.5 stage (that is, the merger stage), when the consensus of the existing Ethereum chain will be integrated into eth2. In addition, the article stated that the client team is working hard, auditors are digging into every detail, and are preparing to launch the mainnet. 2345: The company masters the blockchain application layer technology: 2345 (002195.SZ) responded to investors on the Shenzhen Stock Exchange-Interactive Easy, saying that the company’s “play earning planet” adopts self-developed algorithms, and the company’s mastery It is a blockchain application layer technology. [2020/3/25] V God: The only way to solve the problem of high transaction costs is to expand the capacity V God tweeted that the EIP-2929 announced today may increase some gas costs including particularly sensitive operations, making it more difficult to increase the gas limit Safety. But that's only a tiny short-term relief. Reducing the fee from 465 to 372 gwei does not solve the problem. In a rollup-heavy ecosystem, the gas fee on the chain will remain the same, and 465 gwei may even become the standard, but most transactions will occur inside the rollup, and the actual fee paid by users will be hundreds of times lower. On the other hand, sharding increases the base layer capacity by about 100 times. This could result in a 100x reduction in fees, although not by as much in the long run because people's needs would also increase. All in all, the only solution to the problem of high transaction fees is scaling. Today, Tether, Gitcoin, and other applications are rightfully migrating to ZK rollups. I'm excited about the upcoming optimistic rollups, which will scale rollups to full EVM contracts. Earlier news, V God tweeted that the EIP-2929 proposal proposed to increase the gas cost of the first read storage and account access. This reduces the worst-case processing time in the event of a DoS attack to 1/3, making it safer to maintain high gas limits. Golden Morning | CCTV13: Investors should not confuse blockchain technology with virtual currency; President of the European Commission: The EU should have its own core technology, including blockchain, etc.: 1. The former director of the central bank: Digital currency issuance should be active-ethexc If you want to be highly cautious, you might as well think more about the difficulties; 2. CCTV13: Investors should not confuse blockchain technology with virtual currency; 3. Secretary-General of the National Smart City Standardization Group: New scenarios for blockchain in smart cities Application is a very good means of urban governance; 4. The vaccine traceability collaborative pilot landed in Tianjin, using blockchain to achieve credible traceability; Organic integration of trade; 6. Alipay Security Center refuted rumors: it is indeed forbidden to use virtual currency transactions such as Bitcoin, but risk identification has nothing to do with remarks; 7. Jiangsu Provincial Party Committee: Improve the blockchain talent introduction system and introduce support policies to develop the blockchain industry 8. The blockchain company OK Group uses the Chinese brand name "Ou Ke Group", and Qianjin Holdings plans to change the company name to "Ou Ke Yun Chain"; 9. Fan Yifei, deputy governor of the central bank: steadily promote the introduction and application of digital forms of legal tender; 10. Taiyuan Police Reminder: See clearly the four routines of "blockchain fraud". 1. President of the European Commission: The EU should have its own core technology, including blockchain, etc.; 2. French national TV station TF1 broadcasts bitcoin-related advertisements; 3. Members of the European Central Bank Executive Committee: Digital currency can replace cash and the central bank should not prevent The development of private companies in this field; 4. Upbit’s stolen Ethereum is being split into multiple addresses and part of the funds have flowed into the exchange; 5. Ethereum 2.0 will release a public testnet next week; 7. Singapore Monetary Authority official: Regulatory sandbox is a supportive policy for financial technology companies including blockchain companies; 8. Swiss Federal Council calls for better blockchain supervision Framework; 9. Upbit CEO: Upbit and its operating company Dunamu have enough funds to make up for the loss; 10. EOS node internal strife: 7 nodes are controlled by the same Chinese node, and foreign nodes have initiated a disqualification vote. [2019/11/29] Polkadot has officially launched the v0.8.23 version announcement | Huada Genomics: Will further increase the research and development of blockchain technology and promote the application in medical and health fields: Huada Genomics said on the interactive platform today that 2017 Nianhua University has begun to deploy blockchain and privacy computing technology. Under the real environment of the explosion of genomics big data and the increasing demand for privacy protection, it aims to use new technologies to promote the safe sharing and privacy protection of life big data. In the future, BGI will further increase the research and development of blockchain technology, promote the implementation of scenarios, and rely on scientific research and industrial advantages to promote the application of blockchain technology in real economic fields such as medical care and health. (First Finance and Economics) [2019/11/3] On September 1, Bill Laboon, director of technical education at the Web3 Foundation, tweeted that Polkadot has officially launched version v0.8.23, and it is recommended to upgrade in time. The updates involved in this version include deleting the v0 node-side parachains code (1609) block packaging size limit, etc. Polkadot will soon test a new mechanism for automatically increasing the number of verifiers On September 3, Bill Laboon, director of technical education at the Web3 Foundation, tweeted that the Polkadot community has started discussions on the plan to increase the number of verifiers on the Polkadot network on Polkaassembly. According to the discussions on Polkasembly, and by comparing and drawing on the different schemes adopted by the Kusama network to increase the number of verifiers, the official gave three schemes: 1. Community members submit public votes or initiate external motions. This method is the first solution of Kusama network. Proposals are put forward by community members or members of the Legislative Council, and the number of new verifiers is suggested and then voted by the public. However, the disadvantage of this scheme is that it is too random, and factors such as network stability and token pledge amount are not considered. 2. Plan event mechanism. The program also requires a public vote or external motion, subject to certain conditions being met. Specifically, starting from a specific block, the number of validators will follow the rule of increasing by 2 every 3600 blocks. (The Kusama network cancels this rule after the number of verifiers reaches 600.) 3. Automatic increase function. Referring to Kusama experience, the Polkadot community is experimenting with the mechanism proposed by the Parity and W3F teams. The mechanism follows the minimum/AvgStaked (average pledged amount) ratio, and specifically follows two rules: a. The bottom 1% of verifiers with an average pledged amount exceeding 40% of the global average will increase the number of active-ethexc verifiers in the next block by 1% ; b. If the average pledge amount of the bottom 2% validators is strictly lower than 20% of the global average, the number of active-ethexc validators will be reduced by 1% in the next block. This ratio is configurable and subject to community decision. Meanwhile, officials say that for Kusama, the recommended rate is 40%, and the mechanism will be tested soon. News | US telecommunications giant Verizon is using blockchain technology to support dynamic creation of virtual SIM cards: US telecommunications giant Verizon is using blockchain technology to support dynamic creation of virtual SIM cards. It is reported that Verizon has developed a virtual SIM card (vSIM), which is protected based on blockchain encryption technology. On September 10, the company's patent for this technology was approved by the US Patent and Trademark Office. (Coindesk) [2019/9/20] The Polkadot ecological project Stafi Protocol will launch the mainnet on September 7th On September 3rd, the Polkadot ecological project Stafi Protocol announced that the mainnet will be launched on September 7th at 8 pm Beijing Official launch (12:00 noon on September 7, UTC time). The previous incentive testnet program was successfully concluded on August 26. During 2 months of testing, the testnet plans to have 600+ participants, 400+ validators, and 3 rounds of progressively difficult testing. The Stafi Foundation will create 6 nodes when the main network is launched to maintain the stability and security of the network in the first era. In the first era, community validators can register as validators. Those who successfully register can participate in the second era of the Stafi network. The initial verification node group will consist of 60 nodes, which may be expanded to 200 later. The block time is 6 seconds/block. The inflation rate of FIS in the first year will be 10% to incentivize the first generation of staking users and nodes. The ideal betting ratio is 75%. Nominators (confirmers) will benefit from inflation. However, unlocking nominations will take 14 days. Polkadot DeFi public chain RioDeFi technology code audited by security company Certik Network security company Certik just released their audit report on RioDeFi technology code, CertiK also conducted a comprehensive audit and penetration test on RioDeFi and RioDeFi wallets. In the audit, Certik affirmed RioDeFi's initiative in performing security tests and expressed appreciation for RioDeFi's security value. This audit work started six months ago, and after six months of close cooperation between the two parties, the audit was finally completed. RioDeFi uses Substrate and RUST as the underlying protocol to develop a cross-chain public chain. RioDeFi is a DeFi infrastructure platform designed to accelerate the adoption of digital assets by bridging traditional and decentralized finance. This is a solution that connects businesses, financial institutions and banks with distributed decentralized systems through cross-chain technology. The Filecoin mainnet code will be frozen on September 30. The mainnet may be launched in October. On September 3rd, Filecoin officially held an online conference call for global community members. The official said that the main network code will be frozen soon. And the day before the meeting, the official has released the progress time of the official version of the mainnet on GitHub: from September 4th, the mainnet code will no longer add new functions. The fit is tested and final optimized, and the code is frozen on September 30. This may mean that the Filecoin mainnet may be launched in October. Filecoin official members: Unreleased block rewards can be used for pre-staking At 10 am Beijing time on Thursday, September 3, Filecoin officials held an online meeting on Zoom. The meeting discussed the mechanisms and models in the Filecoin economic model, and Questions from the community about the economic model. JuanBenet participated in this online discussion on economic modeling. Members of the Filecoin economic model team said in the economic model online discussion: In addition to the initial start-up funds, the main network will allow unreleased block rewards to be used for pre-staking. The Cosmos cross-chain protocol IBC1.0 has completed 85%. On September 4th, the core development of the Cosmos project IBC1.0 is currently in the final development stage, and 85% has been completed, an increase of 3% compared to the progress in August. According to the data records on the Cosmos chain, the average block time is 7.15 seconds, 185.41 million Atoms are pledged, the pledge rate is 71.21%, and the inflation rate is 7%. The cross-chain project Cosmos formed a technical working group to develop Interchain standards for NFT and Metadata. The cross-chain project Cosmos announced the formation of a technical working group to develop interchain standards (InterchainStandards) for NFT and its Metadata. This will contribute to a set of interoperable open standards and reference software implementations for NFTs and metadata. In addition, this will be a great complement to the Inter-Blockchain Communication Protocol (IBC), enabling cross-network discovery, authentication, control and use of NFT and its metadata resources. Currently the group is recruiting more collaborators, collecting NFT and metadata use cases to calibrate the standard and reference implementation.

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