Unlocking Optimism: A Web3 User Guide to Optimism Layer 2 Network

Ethereum, the leading platform for decentralized applications (DApps) and smart contracts, faces significant scalability challenges due to its high popularity. The network's limited capacity to handle transactions—about 20-40 transactions per second (TPS)—often results in congestion and skyrocketing fees during peak times. To address these issues and improve user experience, Layer 2 (L2) scaling solutions have been developed. These solutions process transactions off the main Ethereum chain, reducing congestion and costs. One of the prominent L2 solutions making waves in the blockchain community is Optimism, also known as OP Mainnet.

What is Optimism?

Optimism, or OP Mainnet, is a Layer 2 scaling solution specifically designed to enhance Ethereum's throughput and reduce transaction costs. By leveraging Optimistic Rollups, Optimism processes transactions off-chain and then submits them to Ethereum for validation. This method preserves the security of Ethereum while significantly boosting performance.

History and development

Optimism was developed by Optimism PBC (Public Benefit Corporation) to address the growing scalability issues on Ethereum. Since its inception, it has garnered strong support from the Ethereum community and various decentralized finance (DeFi) platforms, reflecting its importance and effectiveness. The project launched its mainnet in January 2021 and has been progressively enhancing its protocol to support a wider range of applications and users.

Key features and benefits

Optimism offers several key benefits:

• Improved transaction speeds: Processing transactions off-chain significantly increases the TPS compared to Ethereum's mainnet.

• Lower gas fees: By reducing the workload on Ethereum, Optimism lowers gas fees, making transactions more affordable.

• Enhanced user experience: Faster and cheaper transactions improve the overall experience for users and developers alike.

Long-term vision

Optimism aims to create a more equitable economy, with a commitment to retroactive public goods funding. Their vision includes building infrastructure to support Ethereum's long-term growth and aligning incentives for sustainable development.

How Optimism works

Optimism operates using a technology called Optimistic Rollups. This method bundles multiple transactions together and processes them off-chain before submitting them to Ethereum in batches.

Explanation of Optimistic Rollups

Optimistic Rollups assume that all transactions are valid by default. They only perform computations off-chain and periodically submit transaction data to Ethereum. If no one disputes these transactions within a certain period, they are considered valid.

Transaction processing and validation

Transactions are processed off-chain and then periodically committed to the Ethereum mainnet. This batching process reduces congestion and improves scalability by allowing Ethereum to handle more transactions with less computational effort.

Security measures and fraud proofs

To ensure security, Optimism employs a fraud-proof mechanism. If a transaction is disputed, the system checks the validity of the transaction through fraud proofs. This involves submitting a "challenge" to prove that a transaction is incorrect, which triggers a verification process. This method ensures that only valid transactions are finalized, maintaining the network's integrity.

The Role of the OP Token

The OP token plays a central role in the Optimism ecosystem.

Overview of the OP Token

The OP token is used for governance within the Optimism network. Token holders can vote on important decisions, including protocol upgrades and other critical changes. The OP token also facilitates network security and incentivizes participation in governance.

Airdrop details and eligibility

To promote decentralization and community involvement, Optimism conducts airdrops to distribute OP tokens to eligible users. This initiative aimed to foster broader participation in the network’s governance.

Governance and participation rights

OP token holders have the right to participate in governance decisions. This includes voting on protocol changes and other important network upgrades, ensuring that the community has a say in the network's future.

How to use Optimism

Getting started with Optimism is straightforward and involves a few simple steps.

Get a wallet that supports optimism

To start using Optimism, you'll need a compatible wallet. The BitPay Wallet is a self-custody app that supports Optimism, along with other top L2s and traditional blockchains. Since Optimism operates as an Ethereum L2, all gas or network fees will be paid in ETH. Ensure your wallet contains some ETH to cover these fees. 

The best self-custody wallet to hold and connect your assets on Optimism.

Get the App

Bridge ETH or ERC-20 assets to Optimism

To begin using Optimism, you'll need to bridge your assets from the Ethereum mainnet. Visit a bridging service like the Optimism bridge. Connect your Ethereum wallet to the bridge interface, select the asset you wish to transfer—either ETH or ERC-20 tokens—and specify the amount. Confirm the transaction in your wallet. The bridge will process the transfer, and within minutes, your assets will be available on Optimism for lower-cost, faster transactions.

Explore and use dApps on Optimism

Once your assets are on the Optimism network, you can start exploring a variety of decentralized applications (dApps) that offer enhanced functionality with lower fees and faster transactions. Popular dApps such as Uniswap, Sushiswap, and Aave are integrated with Optimism, allowing users to trade tokens, provide liquidity, and engage in lending and borrowing activities seamlessly. Connect your Ethereum wallet to the Optimism version of these platforms to experience robust services with the benefits of Layer 2 scaling.

Comparison with other Layer 2 Solutions

Optimism vs. Arbitrum

Optimism and Arbitrum are two of the most well-known Layer 2 solutions for Ethereum. Both use Optimistic Rollups to enhance scalability but differ in their technical implementations. Optimism uses single-round fraud proofs, which offer faster transaction processing but can be costlier. Arbitrum, on the other hand, employs multi-round fraud proofs, making it more cost-effective.

Other notable Layer 2 Networks

Besides Optimism and Arbitrum, Polygon is another prominent Layer 2 solution. Unlike Optimism and Arbitrum, Polygon uses a sidechain approach to handle transactions, offering high transaction speeds and low fees but with different security and decentralization trade-offs.

The future of blockchain with Optimism

Optimism represents a pivotal advancement in tackling Ethereum's scalability challenges, offering faster transaction speeds and significantly lower gas fees. By utilizing Optimistic Rollups, Optimism not only enhances the efficiency of Ethereum but also improves the overall user experience, making decentralized applications more accessible. Looking ahead, Optimism's roadmap includes further protocol enhancements and broader ecosystem integration, set to drive broader adoption, foster innovation, and ensure sustainable growth. As the demand for scalable blockchain solutions continues to rise, Optimism stands out as a critical component in the evolution of decentralized finance and Web3 technologies.

More resources for a deeper dive into Optimism

• Airdrops: https://app.optimism.io/airdrops

• Retrofunding: https://retrofunding.optimism.io/

• Featured Optimism apps: https://www.optimism.io/apps

• Developer docs: https://docs.optimism.io/