On June 22, 2020, the decentralized file and web hosting protocol Interplanetary File System (IPFS) released go-ipfs version 0.6. The official said that this version is a relatively small update from a code point of view, but it contains important updates to the IPFS protocol, including QUIC transmission is enabled by default, and supports NOISE secure transmission, but it will not be enabled by default.

On June 29, 2020, the Balancer liquidity pool was attacked by a flash loan and lost $500,000. The two token pools on Balancer that suffered losses were STA and STONK. At present, the liquidity of these two token pools has been exhausted. Note that both STA and STONK tokens are deflationary tokens, which means that this attack only affects the liquidity pool of deflationary tokens.

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Balancer is essentially a liquidity provider similar to Uniswap. The more liquidity provided by miners, the greater the probability of successful mining.

Balancer's deflationary tokens (tokens whose circulation decreases with time) STA and STONK were attacked by flash loans, which essentially use the short-term provision of huge liquidity to increase the probability of successful mining in a short period of time, thereby stealing $500,000 worth of digital asset attacks.

In response to this attack, Balancer took the following measures:

(1) Add tokens with transfer fees to the UI blacklist;

(3) Two comprehensive audits have been taken, and a third comprehensive audit will be taken soon.

On June 28, 2020, during the development progress of Ethereum 2.0 Phase 0, developers considered the security issues of the Vyper compiler, and the deposit contract has been rewritten from Vyper to Solidity language, and has been re-verified. At the same time, the new contract retains the previous interface, so it has no impact on the clients. In addition, due to the higher degree of optimization of Solidity, the new contract can also save Gas costs.

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As we all know, ETH 2.0 adopts the PoS consensus mechanism, and the packaging probability of mining success depends on the coin age of the miner's deposit on the deposit contract - the amount of currency held * the duration of currency holding. Therefore, deposit contracts play a vital role in the economy of ETH 2.0.

Since the Vyper language essentially follows the syntax of Python 3, its biggest feature is safety and simplicity. It essentially calls edited software toolkits and functions, which belongs to the upper-level language. However, Solidity is an object-oriented language like Java and is the underlying language.

Similarly, although Vyper has a simpler code structure than Solidity, its operating efficiency is not as good as Solidity. Therefore, in order to ensure the transaction speed and data throughput of ETH 2.0, ETH 2.0 replaced the deposit contract with Solidity, which is more efficient.

On June 23, people familiar with the matter revealed that PayPal plans to launch a direct sales service for digital assets to its 325 million users. It is not yet clear which digital assets PayPal will offer direct sales services, and how much. Industry insiders said that PayPal is expected to "work with multiple exchanges to obtain liquidity."

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The addition of PayPal is actually not unexpected. On the one hand, when Facebook launched the Libra public chain in 2018, PayPal was the founding node at that time. Later, Paypal announced its withdrawal midway, which was also affected by relevant US policies.

On the other hand, it is not difficult to infer that paypal itself has a tendency towards blockchain and digital assets. As a payment tool, PayPal has similarities with competitors such as venmo.

When the user capacity reaches the bottleneck, it is necessary to develop new services and comprehensively improve the average user profit level. Therefore, PayPal is embracing emerging things, not just blockchain. In the future, more large international companies will participate in the blockchain/digital asset industry.