BlockBeats news, ethereum founder Vitalik Buterin tweeted today that the initial deployment of ethereum's Layer 2 expansion strategy has been "basically" successful, with all that remains is refining and deploying. "The challenge is that users need to have a wallet so they can store cryptocurrencies using either the Rollup or Plasma framework, which is an application challenge, not a technical one," Buterin added.

According to ethereum developer Philipp & NBSP; Castonguay concluded on twitter that in the past month, ethereum has developed Layer 2 through the following steps.
1. StarkWareLtd: L2 ZK chain (0.003$/tx) goes online;
2. Loopringorg: L2 zk-rollup will conduct real-time transmission in June;
3. Tether: just integrated with OMG Network to launch USDT on this Network;
4. Maticnetwork: the main network was launched yesterday;
5. Dharma: open source peer-to-peer payment expansion scheme last Friday;
6. Integration of ORU test network between OptimismPBC and Synthetix;
7. Fuel Labs conducted oru-based Reddit token transfer.

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