Decentralized Finance (DeFi) has rapidly evolved since 2020:

• V2 Era: Represented by Uniswap V2 and Aave V2, focused on automated trading and decentralized lending.

• V3 Era: Addressed capital efficiency, solving low utilization and fragmented liquidity.

• V4 Era: Moving toward modularity and programmability, aiming for more flexible, composable finance.

II. Core Features of DeFi V3

1. Concentrated Liquidity

Liquidity providers (LPs) can allocate funds within specific price ranges, greatly improving capital efficiency and reducing idle liquidity.

2. Multiple Fee Tiers

LPs can choose between different fee levels (e.g., 0.05%, 0.3%, 1%), suiting varied risk/reward strategies.

3. Active Position Management

LPs need to actively manage their positions. This favored the rise of professional market-making teams.

4. Industry Standardization

The V3 model became a benchmark for many DEXs (e.g., PancakeSwap V3, Curve V3).

III. Core Features of DeFi V4

1. Hooks Mechanism

Developers can attach custom logic at different stages of a swap. Examples:

• Dynamic fees

• On-chain limit orders

• Automated yield distribution or fee sharing

2. Singleton Architecture

All liquidity pools exist within a single contract, cutting down on gas consumption.

3. Lower Gas Costs

Compared to V3’s multi-contract architecture, V4 transactions and LP operations are far more cost-efficient.

4. Modularity and Composability

V4 is envisioned as the “App Store of DeFi,” enabling developers to build custom features and new financial products (e.g., RWA, derivatives) with ease.

IV. V3 vs V4 Comparison

V. Future Trends

1. V3: Capital Efficiency Upgrade

Best suited for professional LPs, offering high capital efficiency but requiring active management.

2. V4: Modular “Financial Lego”

Hooks + singleton design make DeFi programmable, enabling limitless on-chain innovation.

3. Cross-Chain and Multi-Chain Growth

V4’s modular architecture aligns well with cross-chain infrastructure, supporting the next wave of Web3 finance.

Conclusion

• V3’s focus: Boosting capital efficiency

• V4’s focus: Unlocking modular, programmable DeFi
  The evolution of DeFi is moving from capital optimization toward financial composability and innovation.