Introduction
The maturation of technical standards and protocols is key for any technological field to transition from chaos to order, from workshop to industrialization. In the blockchain field, the power of standardization is equally crucial.
1. Establishment of the ERC-20 Token Standard
- Event Background: In Ethereum's early days, each newly created token had its own unique smart contract implementation. This meant that applications needing to interact with tokens—exchanges, wallets, and DApps—had to write customized code for each new token, greatly hindering token circulation and ecosystem integration.
- Event Details: In November 2015, Ethereum developer Fabian Vogelsteller proposed EIP-20 (Ethereum Improvement Proposal #20), suggesting the creation of a universal interface standard for tokens on Ethereum. This standard defined a set of common functions that all token contracts should follow, such as
totalSupply()(total supply),balanceOf()(query balance),transfer()(transfer), etc. This proposal was eventually widely accepted by the community, becoming the de facto ERC-20 standard. - Direct Impact:
- Composability and Interoperability: The ERC-20 standard enabled all tokens following this standard to be seamlessly supported by any wallet, exchange, or DApp. This plug-and-play interoperability greatly promoted token issuance and circulation.
- Igniting ICO Boom: ERC-20 dramatically lowered the technical barrier for "one-click token creation," allowing anyone to deploy a standard-compliant token contract within minutes. This was the most important technical prerequisite for the 2017 ICO boom.
- Long-term Significance:
- Foundation for DeFi and NFTs: The ERC-20 standard is the cornerstone that enabled the DeFi world to be built. All DEXs, lending protocols, etc., rely on this unified standard for token interactions. Later, the ERC-721 standard for non-fungible tokens was derived from this foundation, spawning the NFT ecosystem.
- Network Effects Paradigm: ERC-20's success demonstrated the enormous power of technical standards in building platforms and network effects. It attracted numerous project teams to issue assets on Ethereum, thereby locking in Ethereum's core position as an "asset issuance platform."
- Lessons Learned: A simple, open, widely accepted technical standard may be more valuable than countless complex but closed systems. Standardization is the prerequisite for achieving large-scale collaboration and innovation.
- Subsequent Development: ERC-20 remains the most important and fundamental token standard on Ethereum today. Building upon it, the community has developed a series of standards including ERC-721 (NFTs), ERC-1155 (multi-token standard), etc., continuously enriching Ethereum's asset types.
2. Maturation of Layer 2 Solutions
- Event Background: With the explosion of DeFi and NFT applications on Ethereum, the mainnet (Layer 1) became extremely congested, with transaction fees (Gas Fees) skyrocketing. During peak periods, a simple transaction could cost tens or even hundreds of dollars in fees, greatly limiting ordinary user participation and further application development. Ethereum faced a severe "scalability crisis."
- Event Details: To solve this problem, the community proposed moving large amounts of computation and transactions to "Layer 2 networks" for processing, then compressing and submitting final results back to the mainnet for settlement. Among these solutions, Rollup schemes represented by Optimistic Rollups and ZK-Rollups became mainstream. During 2021-2023, Optimistic Rollup solutions represented by Arbitrum and Optimism matured first and went live, attracting large numbers of users and funds. By providing Ethereum Virtual Machine (EVM) compatible environments, they enabled developers to easily migrate their DApps to Layer 2.
- Direct Impact:
- Dramatically Reduced Transaction Costs: Layer 2 reduced Ethereum transaction costs by 10-100 times, making many applications previously unimaginable on the mainnet (such as high-frequency trading, games, social) possible.
- Ecosystem Diversion and Prosperity: Large numbers of DeFi and gaming projects began deploying on Layer 2 networks like Arbitrum and Optimism, forming independent yet interconnected ecosystems, greatly enhancing the overall capacity of the Ethereum system.
- Long-term Significance:
- Established Ethereum's Modular Roadmap: Layer 2's success marked the Ethereum community's final establishment of a "Rollup-centric" modular scaling roadmap. This means the mainnet (Layer 1) focuses on being a secure and decentralized "settlement layer," while outsourcing "execution" (computation) functions to more efficient Layer 2s. This represents a profound architectural evolution.
- Released Application Innovation Potential: By solving scalability bottlenecks, Layer 2 paved the way for the emergence of next-generation more complex blockchain applications, serving as a necessary path for Web3 to achieve mass adoption.
- Lessons Learned: When underlying infrastructure encounters bottlenecks, solving problems through "layering" and "modularization" is an effective architectural evolution strategy. However, Layer 2 also brings new challenges, such as cross-chain complexity and centralized sequencer risks.
- Subsequent Development: ZK-Rollups solutions (like StarkNet, zkSync), considered more secure and efficient Layer 2 schemes, are also rapidly developing and maturing. Ethereum mainnet upgrades (like Proto-Danksharding, i.e., EIP-4844) are also specifically providing cheaper data storage space for Layer 2 to further reduce costs. Competition and interoperability between Layer 2s will be a core focus of industry development in the coming years.