Technology Weekly｜Filecoin confirms the space program time Polkadot splits DOT

This week's Technology Weekly contains technical news about the three networks of Ethereum, Polkadot, and Filecoin.

If the participation rate of Medalla verifiers on the Ethereum 2.0 testnet fails to pick up, it will consider redeploying the deposit contract

PrysmaticLabs, the execution team of the Ethereum 2.0 client, released an analysis report on the current clock bug of the testnet Medalla. Ethereum developer benjaminion concluded that within a few minutes on the evening of August 14, the number of active-ethexc validators dropped from 22,000 to about 5,000. About 80% of the verifiers disappeared, and the cause of the event was a problem with clock synchronization (clocksync).

The Prysm client is configured to use Cloudflare's Roughtime to calculate time. So far, the network is gradually recovering, and the new versions of Prysm and Lighthouse are continuing to build the beacon chain. In the future, Teku will continue to be optimized to reduce the resources required for synchronization. However, there is no consensus failure between clients. When the network is restored, all clients can reach a consensus on the state of the chain head. The beacon chain will not fundamentally fail, and no hard fork will be required. All client teams are currently working on hardening the client to handle extreme network situations. It is expected to bring Medalla back to normal in the next few days, which may affect the balance of all validators, and some validators will also face weakening. If the network is functioning normally, but validator participation rate still cannot pick up, it may consider redeploying the deposit contract from scratch.

Fu Xiaoming, Academician of the European Academy of Sciences: Blockchain technology has become an important technical resource: Jinse Finance live report, on August 14, 2020, the Global Blockchain Innovation and Development Conference opened in Ganzhou, Jiangxi Province. At the meeting, Fu Xiaoming, Academician of the European Academy of Sciences, said in a speech , through the changes in the price of Bitcoin over the past 10 years, we can see that blockchain technology has become an important technical resource. Finance is the largest application of blockchain. In addition to finance, there is room for development and application in energy, health, government affairs, media and other fields. [2020/8/14]

Prysmatic Labs has launched version v1.0.0-alpha.23 to stabilize the node synchronization process

On the evening of August 18th, Prysmatic Labs, the executive team of the Ethereum 2.0 client, officially tweeted that it has officially released the latest v1.0.0-alpha.23 version. This release stabilizes the node validator sync process and has a number of critical fixes. According to previous news, a clock bug appeared on Medalla, the Ethereum 2.0 test network, which caused problems in network block verification. Earlier today, Prysmatic Labs, the executive team of the Ethereum 2.0 client, issued an article summarizing that if the participation rate of Medalla verifiers on the Ethereum 2.0 testnet fails to pick up, it will consider redeploying the deposit contract.

Medalla, the Ethereum 2.0 testnet, is up and running

The Ethereum 2.0 test network Medalla is up and running again. Although the validator participation rate has increased a lot, the participation rate has just fluctuated significantly. Nishant Das, a programmer on the Prysmatic Labs ethereum 2.0 client, said it was unclear why the participation rate fluctuated, with some saying their nodes slashed validators for some blocks. Now the system is running, and it seems to be running stable. This is great for eth, since finding bugs is the whole point of testnets. (Trustnodes)

News | CCB uses blockchain technology and other financial means to resolve the problem of migrant workers' wage arrears: According to the Financial Times, CCB uses blockchain technology and other financial means to resolve the problem of migrant workers' wage arrears. The relevant person in charge of CCB said that by using blockchain technology to connect government departments, owners, general contractors, labor service companies, migrant workers, and employment management platforms, through big data analysis and model calculation of the entire industry chain information, to labor service companies Distribute special financing funds for migrant workers' wages, solve the problem of funding sources for migrant workers' wages, and ensure that "money is paid"; and provide objective data such as attendance management and employment details of migrant workers through technical means such as electronic fence punching, and lock in "payment" To whom'; and the financing funds of labor service companies are directly paid to the bank cards of migrant workers, so as to realize the real-name system of wages of migrant workers, zero arrears and accurate arrival. [2019/8/26]

Ethereum miners oppose EIP-2878 proposal, block reward drops to 0.5 ETH or threatens network security

According to news on August 20, the executive director of ConsenSys previously submitted the EIP-2878 proposal to reduce the block reward to 0.5 ETH. Ethereum miners have expressed concern about the block reward reduction proposal, and those who use GPU mining are particularly unhappy with the proposal. Previous block reward reductions ranged from 40% to 33%, and going from 2 ETH to 0.5 ETH would mean a 75% reduction in block rewards, which could force miners off the network and reduce its overall security. (BeInCrypto)

News | There are 28 blockchain technology companies in Changsha Economic Development Zone: According to People's Daily Online, the total output value of large-scale industries in Changsha Economic Development Zone from January to June increased by 10.1% year-on-year, and the added value of large-scale industries increased by 8% year-on-year. The Xingsha Blockchain Industrial Park has introduced high-end platforms such as the Chinese Society of Industrial and Applied Mathematics (the first national first-level society whose headquarters office base is located in Changsha), Hunan Xiaoxiang Big Data Research Institute, and Hunan Hexin Blockchain Research Institute. The application of blockchain scenarios has introduced 13 companies, including Quanlutong and Sunshine.com, and the number of blockchain companies has reached 28. [2019/8/1]

The Ethereum Improvement Proposal EIP-2876 tries to optimize the gas consumption in the exchange deposit process

Jonathan Underwood, a Bitcoin technology enthusiast, proposed an improvement proposal EIP-2876 for Ethereum, trying to optimize the recharge process of centralized exchanges and reduce the overall Gas consumption. The document points out that a wallet application compatible with EIP-2876 can send ETH to a compatible deposit system to reduce the overall Gas consumption of the Ethereum network, because two transactions cost 42,000 Gas, but a simple ETH forwarding contract only costs About 30,000 Gas. And for this deposit system, all deposits can be directly forwarded to the cold wallet of the exchange, and manual operations are not required to collect deposits from multiple external accounts.

The latest version of the Ethereum client Geth has added logic to reduce front-running transactions

Voice | Ant Financial Jing Xiandong: Blockchain technology will be applied on a large scale this year’s Double Eleven: Jing Xiandong, chairman of Ant Financial, talked about focusing on exploring blockchain applications in the second Qiantangjiang Forum , revealed in this way, "This year's Double Eleven blockchain has participated on a large scale. There are a lot of overseas and domestic products that use blockchain product traceability, which is equivalent to labeling each product with its place of origin and product information." Well Xiandong emphasized that technology is the biggest dividend of this era, and Ant Financial and Alipay will continue to be driven by technological innovation. [2018/11/4]

Ethereum's official client Geth has added a mechanism to reduce front-running in the latest biweekly maintenance version 1.9.19. According to the change record, this version will sort the same-price transactions according to the transaction receipt time during the mining process, so as to reduce the situation of front-running transactions.

Polkadot has completed the DOT split

Jinse Finance reported that according to official Twitter news, at 00:48 on August 22, Beijing time, Polkadot reached block height 1248328, and DOT tokens began to be revalued and split at 1:100. As a result, the user's DOT balance is now 100 times higher, while the price per DOT is 100 times lower.

Polkadot officially released the overall architecture of XCMP cross-chain messaging

Polkadot officially released the progress of XCMP cross-chain messaging. XCMP is currently under development. The overall architecture and design decisions include: cross-chain messages will not be passed to the relay chain; cross-chain messages will be limited to the maximum size in bytes size; parachains can reject messages from other parachains, in which case the scheduling parachain will know about the block; collator nodes are responsible for routing messages between chains; collator generates a list of "exit" messages and sends Receive "ingress" messages from other parachains; on each block, the parachain is expected to route messages from some subset of all other parachains; when a collator produces a new block for a validator, it collects The latest ingress queue message and process it; the validator will check whether the new candidate for the next parachain block contains the process for the expected ingress message for that parachain. Note: XCMP is one of the cores of Polkadot's cross-chain design, allowing messages to be transmitted between Polkadot's parachains.

Shengguang Co., Ltd. said that the company is conducting research and development of blockchain technology and has no products: Shengguang Co., Ltd. replied to the Shenzhen Stock Exchange inquiry letter: the company is conducting research and development of blockchain technology, and the product is still in the development stage, so there is no direct business for the time being Income will not have a substantial impact on the company's operating results in the short term. [2018/1/22]

Gavin Wood accused Binance of launching the new denomination DOT in advance, causing the currency price to plummet

Polkadot founder Gavin Wood tweeted that some centralized exchanges were "immoral." It is reported that the reason for Gavin Wood’s dissatisfaction is that some exchanges (Binance and Kraken) launched new DOT tokens this Thursday (August 20th), instead of the previously agreed Friday, August 21st. Gavin Wood believes that because the centralized exchange cannot be controlled, it is likely to cause the community to face risks, and this illegal listing of new tokens is also against the interests of the Polkadot community, creating chaos and confusion among DOT holders. The behavior is irresponsible and deceptive, and the exchange may be held liable in the future. According to the original plan, DOT tokens will be split at a ratio of 1:100 after the revaluation, and the value of a single DOT will be reduced accordingly.

Polkadot started the transfer as early as 00:40 on August 19th, Beijing time

The Web3 Foundation officially stated that Polkadot started the transfer at block height 1205128. The earliest time is 16:40 UTC time on August 18, that is, 00:40 Beijing time on August 19; it will be transferred at block height 1248328 DOT split (1:100), the earliest time is 16:40 UTC time on August 21, that is, 00:40 Beijing time on August 22. The Web3 Foundation emphasizes that it is estimated that the above-mentioned block generation time will be 3.5 hours later than the original time, please refer to the actual block height for details. Also, be sure not to "split" DOT until after renaming DOT (old) to NEW DOT (i.e. before approximately August 22nd).

Rococo, the Polkadot parachain test network, performed a fork-free runtime upgrade for the first time

On August 15, Parity engineer Bastian tweeted that Rococo, Polkadot's parachain test network, had undergone a fork-free runtime upgrade for the first time.

Filecoin may issue the token FIL in late September

According to news on August 21, some users received an email from CoinList. The content-ethexc of the email shows that Filecoin tokens are expected to be issued in late September. By default, FIL tokens will go directly to the token wallet.

Filecoin will launch a testnet reward program

Jinse Finance reported that according to the official blog, Filecoin will launch the Filecoin testnet reward program at 6:00 on August 25th, Beijing time. In the next 3 weeks, miners on the Filecoin testnet will compete for prizes of up to 4 million FIL. The collaborative competition, known as the Space Race, aims to stress test the network and encourages participants from around the world to participate, the article said. During the three-week competition, miners will compete to provide as much storage capacity as possible to the network. The top 100 miners in the world and the top 50 miners in each continent will receive Filecoin rewards based on the amount of storage achieved.

Filecoin token distribution issues sparked disputes, the founding team and investors have initiated legal mediation

Filecoin is one of the most anticipated projects in the blockchain industry, aiming to achieve decentralized data storage functions, but behind the scenes, Filecoin development company Protocol Labs and its equity investors have disputes over token distribution, and the two parties are currently in legal proceedings. Mediation. It is reported that Protocol Labs, the parent company of Filecoin, was established in 2014 and later raised several rounds of seed financing. Investors include BlueYard Capital, Digital Currency Group, Union Square Ventures and Winklevoss Capital, but these investments are all equity in the parent company. No token commitments are given to investors. In 2017, Filecoin raised more than $205 million through token sales (including the largest ICO at the time), and Protocol Labs retained a certain percentage of the tokens, which would theoretically give the company’s equity investors more value for their investment. increase. However, multiple sources said that the vast majority of these tokens were unilaterally issued by CEO Juan Batiz-Benet to himself and early employees, and the early investors as shareholders did not receive any tokens, so lead to disagreements between the two parties. According to this legal mediation, Protocol Labs has compromised and allowed early investors to obtain a lower number of Filecoin tokens than they expected, but it is unclear whether all equity investors agree with the plan. (axios)

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