In the previous article, we covered the key consensus mechanisms that enable trust and security on blockchain networks. Now let's explore some of the groundbreaking applications that are being built on top of these blockchains, specifically in decentralized finance (DeFi) and decentralized apps (dApps).
What is DeFi?
DeFi refers to financial services and products that operate on public blockchains without relying on any central intermediaries. Traditional finance is controlled by institutions like banks, brokerages and credit card companies. DeFi aims to open up financial services to anyone with an internet connection.
Some examples of DeFi applications include:
- Decentralized Exchanges (DEXs): Allow peer-to-peer cryptocurrency trading without an intermediary custodian. Uniswap is a popular example.
- Stablecoins: Cryptocurrencies pegged to real-world assets like the US dollar to minimize volatility. Dai is a stablecoin pegged to the dollar.
- Lending/Borrowing Platforms: Enable users to earn interest on cryptocurrency deposits as well as borrow. Compound is a lending protocol.
- Insurance: Users can purchase policies denominated in cryptocurrency to hedge against risks. Nexus Mutual offers decentralized insurance.
Benefits of DeFi
- Accessibility: Anyone can access DeFi services regardless of identity, credit or location.
- Transparency: All transactions and protocol rules are visible on the public blockchain.
- Interoperability: DeFi apps are modular and composable similar to Lego blocks.
- High Interest Rates: Lenders can earn higher interest than traditional savings accounts.
- Lower Fees: By cutting out middlemen, DeFi reduces transaction fees.
Risks of DeFi
- Experimental Technology: As a new space, DeFi bugs can lead to exploits and losses.
- Regulatory Uncertainty: The legal status of DeFi is still evolving in many jurisdictions.
- Liquidity Risks: Low liquidity on DEXs can result in significant slippage on large orders.
- Technical Complexity: DeFi apps have a steep learning curve currently limiting mainstream adoption.
What are dApps?
A decentralized application (dApp) is software that operates on a peer-to-peer network of computers rather than a single computer. dApps have existed prior to blockchain technology but blockchains enable a new type of dApp.
Key properties of blockchain-based dApps:
- Open Source: Code is public for transparency and security auditing.
- Decentralized: Data is stored and processed on a distributed network.
- Incentivized: Validators earn crypto tokens for operating the network.
- Protocol-Based: Apps use an open protocol and consensus rules without centralized control.
Examples of Blockchain dApps
- Uniswap: A decentralized cryptocurrency exchange running on Ethereum.
- SushiSwap: A decentralized exchange similar to Uniswap but offers extra incentives and features.
- MakerDAO: Enables decentralized stablecoins pegged to real world assets.
- Ujo Music: Allows musicians to publish and get paid for songs directly from fans.
- Gitcoin: A decentralized platform for funding and incentivizing open source development.
The Future of dApps and DeFi
DeFi and dApps are still in the early stages but development is accelerating. As blockchain technology advances to support faster and cheaper transactions, while ensuring security, dApp adoption could see exponential growth. The open, transparent nature of dApps and DeFi protocols promises to give users greater control over their money, data and online identity. Just as open source transformed software, decentralized apps on blockchains could profoundly disrupt many industries in the coming years.