Sybil Account Detection in L2 Ecosystems

Key Insights

• Airdrop Sybil attacks involve individuals or automated bots creating multiple accounts to exploit token distributions
• Since mid-summer 2023, the zkSync has averaged approximately 250,000 unique daily active addresses, leading its Layer-2 competitors.
• Arbitrum's user retention and revenue have stabilized due to unique native applications and the launch of its ARB token.
• Base has grown rapidly thanks to diverse offerings and strong performance by its leading app, friend.tech, but currently faces challenges with Sybil accounts.
• zkSync's growth mirrors Arbitrum's early stage, but it lacks a defining native application to ensure long-term viability.

Layer-2s have gained significant traction over the past year as the daily active addresses on L2s have grown from being 27% of Ethereum's active addresses to representing over 157%. In large part, the growth is attributed to the launch of new L2s like Base, zkSync, PolygonZk, and more. Each of these rollups has helped alleviate Ethereum's scaling issues and now boasts transaction costs nearly 10% of Ethereum at roughly $0.10 and below.