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On September 19, the Ethereum blockchain is switching to a Proof-of-Stake mechanism. The network’s Merge will make transactions within the blockchain faster and cheaper. But how does this hard fork affect L2 solutions, which were created precisely to solve the problem of scalability and low transfer speed in the blockchain in the wake of the switch to a new protocol. Sharding could become an extra challenge for L2 protocols, the existence of the L2 protocol might be questioned once again because the off-chain scaling solutions need to provide more advantages for their users.