Original Title: "Base Again in Controversy: The Heated Debate on Whether L2 Counts as an Exchange and the Centralization of Sorters"
Original Author: Eric, Foresight News
Hester Peirce, a commissioner of the U.S. Securities and Exchange Commission (SEC) known as the "crypto mom," stated on "The Gwart Show" that L2s relying on centralized sorters may fit the SEC's definition of a trading platform, thus requiring operators to register with the SEC and comply with relevant regulations.
Hester Peirce indicated that the key to this judgment is not the technology but the actual function. If a single operator controls the matching engine, it is similar to a trading platform. To some extent, this means that as long as there is a centralized organization with trading control over L2, that organization must accept SEC oversight.
Initially, this viewpoint did not spark widespread discussion, but as it continued to ferment, many began to worry that if the "crypto-friendly" SEC could reach such a conclusion, the development of L2s might be hindered. Base, which combines elements of both a trading platform and L2, became the primary target.
As the FUD grew louder, Coinbase's Chief Legal Officer Paul Grewal was the first to speak out, stating that the SEC defines a trading platform as a market connecting buyers and sellers of securities, while L2 operates as a general blockchain infrastructure that can provide services to on-chain trading platforms, just as AWS provides infrastructure to trading platforms, but it cannot be said that AWS is a trading platform. Paul Grewal believes that mislabeling the sorter could lead to overlooking L2's role in scalability.
Subsequently, Base's head Jesse Pollak also explained the sorter on X, stating that the sorter collects user transactions and sorts them according to a first-in-first-out principle to calculate the status changes of results, ultimately consolidating transactions on L1 for settlement, much like a traffic controller ensuring smooth road flow. Jesse Pollak argued that the sorter does not match order trades; the matching occurs at the smart contract level, and the sorter merely ensures that these transactions proceed in a consistent and orderly manner.
Ethereum co-founder Vitalik Buterin joined the discussion after Jesse Pollak, asserting that Base is simply an L2 running on Ethereum, providing a more powerful user experience through centralized functions while still closely integrating with Ethereum's decentralized base layer to ensure security. Vitalik emphasized that Base's funds are "non-custodial," meaning that the funds on L2 are ultimately controlled by L1 and cannot be stolen by L2 operators.
Max Resnick, chief economist at Anza, a company focused on Solana development, questioned Jesse Pollak's statement, indicating that Base's sorter prioritizes transactions based on fees in 200-millisecond increments rather than following a first-in-first-out principle. Although Jesse Pollak later clarified this, it was clear that Max Resnick aimed to highlight that the sorter can reorder transactions according to certain rules, directly pointing to the issue of sorter centralization.
Discussions about whether L2s like Base count as trading platforms do not yield many differing opinions. The SEC commissioner's view that "L2 is a trading platform" may stem from a lack of understanding of L2 architecture. Industry discussions are more driven by regulatory concerns than by right or wrong issues. However, the perspectives of Base stakeholders and Vitalik sparked another layer of discussion: Should the centralization of Base's sorter change?
From Regulatory Issues to the Debate on Sorter Centralization
Vitalik's viewpoint that Base's centralized sorter is for scalability and user experience has also sparked considerable controversy. Eric Wall, co-founder of Taproot Wizards, stated that in terms of fund security, Base is essentially a custodial system and pointed out that Base's contracts can still be upgraded through governance, meaning that operators and their related entities (through a security council) retain significant discretion. In his view, this makes Base functionally closer to a custodial system rather than a fully trust-minimized Ethereum scaling solution. Eric Wall also commented that Vitalik's wording could lead readers to believe that even a key leak would not result in fund loss, which he deemed irresponsible.
Former Ethereum core developer Lane Rettig stated that while Coinbase itself would not maliciously steal user funds, that does not mean Coinbase would not act against user interests under government pressure.
Alex Thorn, head of research at Galaxy, argued that Vitalik's viewpoint missed the point, stating that the focus of the discussion should be on securities on L2, rather than the security of L2 itself. Although Alex Thorn did not explicitly state it, his viewpoint pointed to a very critical issue: L2 itself is not a trading platform, but if the trading platform on L2 is built on a very centralized chain, can these trading platforms still be called DEXs and should they be regulated?
In response to the increasing criticism of Base's centralization, Vitalik reiterated that Base is indeed currently in a centralized phase, where the absolute majority vote of the security council can upgrade contracts, but he pointed out that quorum rules prevent Coinbase from unilaterally reviewing or stealing funds. Furthermore, even a 100% vote from the security council cannot change the running on-chain code, and a second phase is already being planned.
The founder of Anastasia Labs, which is developing Cardano L2 Midgard, sharply interpreted Vitalik's supplementary comments: understanding "security council" as "multi-signature"; understanding "75% vote" as "7 private keys"; understanding "requiring individuals in the council to have more than 26% voting power to veto proposals independent of the organization managing L2" as "requiring that organization to use shell companies, friends' companies, obfuscated subsidiaries, or partner companies to hold the 3 private keys needed for multi-signature."
Many users in the comments supported the founder of Anastasia Labs, believing that although the rules are set this way, it is very easy to bypass the rules to achieve complete control over Base, and the opacity of governance makes these transparent rules seem very untrustworthy.
The Regulatory Dilemma of Web3 Infrastructure
Base's excessive centralization as an L2 has sparked multiple discussions. The SEC commissioner's viewpoint seems somewhat "absurd," but it also points directly to the core issue: if the transaction sorting on L2 can be manipulated at will, then this L2 should be subject to regulation. Of course, regulating L2 as a trading platform may superficially lack basis, but if the L2 operator, through control of the sorter, pockets MEV profits affecting transaction execution prices, then L2 does indeed play a role similar to that of a broker to some extent.
For regulatory agencies, determining the "decentralization" of infrastructure is a challenge. Even if the sorter achieves decentralization, it is difficult to clarify whether there are conflicts of interest among the entities maintaining the sorter network in a short time. The SEC, concerned about the potential for a repeat of the FTX tragedy due to a lack of regulation, has somewhat relaxed regulations during the new U.S. presidential term, but it cannot hide its worries about the significant risks arising from regulatory relaxation. Recently, U.S. regulatory agencies have introduced some exemptions for DeFi, but how to define and review infrastructure remains a question that needs further study.
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