What Is LayerZero (ZRO)?
What Is LayerZero (ZRO)?

What Is LayerZero (ZRO)?

Публикувано Jun 21, 2024Актуализирано Jun 26, 2024

Disclaimer: This article is for educational purposes only. The information provided through Binance Academy does not constitute advice or recommendation of investment or trading. Binance does not take responsibility for any of your investment decisions. Please do your own research and seek professional advice before taking financial risks.

Key Takeaways

  • LayerZero is a project aiming to bridge the gap between different blockchain networks. Its goal is to enable seamless cross-chain communication, allowing assets and data to move freely across different chains.

  • Utilizing Ultra Light Nodes (ULNs), relayers, and oracles, LayerZero can provide an efficient, secure, and scalable interoperability solution.

  • LayerZero has the potential to enhance various Web3 sectors like DeFi, NFTs, and gaming by improving user experience and creating a more unified ecosystem for decentralized applications (DApps).


Blockchain technology has revolutionized the digital world by introducing decentralized systems. However, the ecosystem is fragmented, with various blockchains operating in isolation. This has created a significant demand for interoperability solutions that can connect these disparate networks. LayerZero is one such project aiming to bridge the gap between different blockchains. 

This article will explore what LayerZero is, how it works, and its potential impact on the blockchain landscape. It will also explore the basics of LayerZero’s native token (ZRO) and the ZRO token airdrop.

What Is LayerZero?

LayerZero is an interoperability protocol designed to facilitate seamless communication between different blockchains. It aims to create a unified, interconnected blockchain ecosystem where assets and data can move freely across various networks. This capability is critical for the development of decentralized applications (DApps) that need to interact with multiple blockchains to leverage their unique features and resources.

Key Features of LayerZero

1. Interoperability

LayerZero's primary objective is to enable cross-chain communication. This means that users can transfer assets and data across different blockchains effortlessly. For instance, a user could move tokens from Ethereum to BNB Smart Chain (BSC) without needing a centralized exchange or complex swap process.

2. Ultra Light Node (ULN)

One of the standout features of LayerZero is its use of Ultra Light Nodes (ULNs). Traditional blockchain bridges often rely on full nodes or light clients, which can be resource-intensive. ULNs, on the other hand, provide the necessary security guarantees without the heavy computational and bandwidth requirements. This makes LayerZero more efficient and scalable.

3. Relayers and oracles

LayerZero employs a unique combination of relayers and oracles to validate cross-chain messages. Relayers are responsible for sending transaction proofs, while oracles provide the necessary data for validation. This dual mechanism ensures that no single entity has control over the transaction process, enhancing security and trust.

4. Security

LayerZero's architecture significantly enhances security by distributing trust among multiple entities. Both relayers and oracles must agree for a transaction to be validated. This reduces the risk of fraud or attacks, as collusion between these entities would be required to compromise the system.

5. Scalability

The protocol's efficient design allows it to handle a large number of cross-chain transactions without bottlenecks. This scalability is crucial for supporting the growing demand for cross-chain interactions, especially in areas like decentralized finance (DeFi) and non-fungible tokens (NFTs).

6. Developer-friendly

LayerZero provides a suite of software development kits (SDKs) and application programming interfaces (APIs) to help developers easily integrate cross-chain capabilities into their DApps. This simplifies the development process and promotes broader adoption of the protocol.

How LayerZero Works

Understanding how LayerZero works requires delving into its architecture and the roles of its key components: Ultra Light Nodes, relayers, and oracles.

Ultra Light Nodes (ULNs)

ULNs are lightweight nodes that provide the security guarantees of full nodes without their resource demands. They achieve this by relying on off-chain entities (relayers and oracles) to perform heavy computations and validate transactions.

  • Efficiency: ULNs do not need to store or process large amounts of data, making them highly efficient.

  • Security: By offloading validation tasks to trusted off-chain entities, ULNs maintain security without compromising performance.


Relayers are responsible for transmitting transaction proofs between blockchains. When a transaction occurs on one blockchain, the relayer sends a proof of this transaction to the target blockchain.

  • Decentralization: Multiple independent relayers can operate within the LayerZero network, reducing the risk of centralization.

  • Verification: Relayers do not have the power to finalize transactions on their own; their role is to provide necessary proofs.


Oracles provide the data required to validate cross-chain transactions. They work in conjunction with relayers to ensure that transaction proofs are accurate and trustworthy.

  • Data accuracy: Oracles pull data from reliable sources to confirm transaction details.

  • Dual validation: Both the relayer's proof and the oracle's data must match for a transaction to be validated.

The validation process

1. Transaction initiation: A user initiates a transaction on the source blockchain.

2. Proof generation: The relayer generates a proof of the transaction.

3. Oracle data provision: The oracle provides the necessary data to validate the transaction.

4. Cross-chain validation: Both the relayer's proof and the oracle's data are sent to the target blockchain.

5. Transaction finalization: The target blockchain validates the transaction if both the proof and the data match, completing the cross-chain transfer.

Example: Token transfer from Ethereum to BNB Smart Chain (BSC)

1. Initiation: The user sends 100 tokens from their Ethereum wallet to a LayerZero smart contract on Ethereum.

2. Locking: The LayerZero smart contract locks the 100 tokens on Ethereum.

3. Proof generation: A relayer generates proof of this transaction and sends it to BSC.

4. Oracle data: An oracle retrieves and verifies the transaction details from Ethereum.

5. Cross-chain validation: BSC receives the proof and data, verifying the transaction.

6. Minting/unlocking: LayerZero’s smart contract on BSC mints 100 wrapped tokens or unlocks 100 pre-locked tokens.

7. Finalization: The user receives 100 tokens in their BSC wallet.

At this point, you might be asking: how is this different from regular blockchain bridges? Let’s find out.

LayerZero vs. Blockchain Bridges

LayerZero’s approach to cross-chain transfers differs from traditional bridges in many ways, particularly in terms of architecture, security, and efficiency. Below are some of the key differences between LayerZero and traditional blockchain bridges.

1. Architecture:

  • LayerZero: Utilizes Ultra Light Nodes (ULNs), which reduce the need for heavy computational resources by relying on off-chain entities (relayers and oracles) for validation.

  • Traditional bridges: Often depend on full nodes or light clients, which are more resource-intensive.

2. Security:

  • LayerZero: Employs a dual mechanism of relayers and oracles, distributing trust and reducing the risk of single points of failure. Both must collude to compromise the system.

  • Traditional bridges: Frequently rely on centralized or single-party validators, making them more susceptible to attacks if the central entity is compromised.

3. Efficiency:

  • LayerZero: Designed to be highly efficient, with lower computational and bandwidth requirements, resulting in cost-effective cross-chain transactions.

  • Traditional bridges: Typically have higher resource consumption, leading to potentially higher transaction fees.

Benefits of LayerZero:

  • Generalized interoperability: Can connect any blockchains, providing a flexible and scalable solution.

  • Developer-friendly: Offers SDKs and APIs for easy integration of cross-chain functionality into dApps.

  • Reduced attack surface: A decentralized trust model enhances security compared to centralized bridges.

LayerZero's innovative approach ensures more efficient, secure, and flexible cross-chain interactions, addressing many limitations of traditional blockchain bridges.

ZRO Token

The ZRO token is the native governance token of LayerZero. It incentivizes participation and decision-making within the LayerZero community. ZRO token holders can vote on important changes and improvements to the LayerZero protocol.

The ZRO token was listed on Binance with the seed tag applied on June 20, 2024. Please refer to the official listing announcement for more details.

ZRO Token Airdrop

The ZRO token airdrop distributed 8.5% of the total supply to eligible wallets. This includes 5% for the core community, 3% for Request for Proposal (RFP), and 0.5% for the community pool.


1. Request for Proposal (RFP). Wallets listed in an approved Protocol RFP submission were eligible, with a minimum allocation of 5 ZRO and a maximum of 10,000 ZRO. Specific protocol allocations were determined based on various factors, such as:

  • The number of messages sent before and after the snapshot.

  • The number of days since the first message was sent on LayerZero.

  • The application category (OApp, OFT, ONFT).

Developer allocations aimed for a 90/10 split, with a maximum of 100,000 ZRO per developer team. Any excess is distributed among other developers.

2. Core. All users who transacted on the LayerZero protocol before the snapshot were eligible, with a minimum allocation of 25 ZRO and a maximum of 25,000 ZRO. Allocations were based on the protocol fees paid and some additional factors, such as:

  • Transactions under $1 and valueless non-fungible token (NFT) transactions were deweighted by 80% to prioritize genuine engagement.

  • Multipliers were given to early and post-snapshot users to recognize ongoing participation in the protocol.

How to claim the ZRO airdrop?

Be wary of fake websites and phishing attacks. Make sure you are using the official websites and channels. 

Follow these steps to check your eligibility and claim your ZRO tokens:

1. Visit the official airdrop website

2. Connect your EVM or Aptos wallet and check whether you are eligible for the airdrop. If you are eligible, the page will display the number of tokens you can claim.

3. Select a claim network from the given options.

4. To claim the tokens, you will need to donate $0.10 in USDC, USDT, or native ETH per ZRO.

5. Click [Claim] to receive your ZRO tokens.

Potential Impact of LayerZero

LayerZero's ability to enable seamless cross-chain communication has far-reaching implications for the blockchain ecosystem.

1. Enhanced decentralized finance (DeFi)

DeFi platforms can significantly benefit from LayerZero's interoperability. Currently, DeFi users often face challenges in moving assets across different blockchains, leading to fragmented liquidity and higher transaction costs. LayerZero can streamline these processes, allowing for more integrated and efficient DeFi applications.

2. Broader NFT utilization

The NFT space is another area where LayerZero can make a substantial impact. By enabling NFTs to move across different blockchains, LayerZero can enhance their utility and reach. Artists and creators can leverage the unique features of various blockchains, such as lower fees or better scalability, to optimize their NFT projects.

3. Interconnected gaming and metaverse

In the gaming and metaverse sectors, LayerZero can facilitate the creation of interconnected experiences. Gamers can move assets and in-game items across different platforms, creating a more seamless and immersive experience. This interoperability can drive innovation and attract more users to blockchain-based games and metaverse projects.

4. Improved user experience

One of LayerZero's key goals is to improve the user experience by providing fast, secure, and cost-effective cross-chain transactions. Users no longer need to rely on multiple wallets or go through complex processes to transfer assets between blockchains. This simplicity can drive broader adoption of blockchain technology.

5. Unified DApp ecosystem

By enabling seamless communication between different blockchains, LayerZero can help create a more unified DApp ecosystem. Developers can build applications that leverage the strengths of multiple blockchains, leading to more robust and versatile DApps.


While LayerZero presents a promising solution for blockchain interoperability, it is not without challenges. Ensuring the security and reliability of relayers and oracles is crucial. Additionally, achieving widespread adoption will require convincing developers and users of the protocol's benefits.


Although the dual mechanism of relayers and oracles enhances security, it also introduces potential points of failure. Ensuring that these entities remain honest and reliable is essential. Regular audits, decentralized governance, and incentive mechanisms can help mitigate these risks.

Adoption and integration

Convincing developers to integrate LayerZero into their DApps may take time. Providing comprehensive documentation, support, and incentives can encourage adoption. Collaborations with existing projects and blockchain networks can also accelerate this process.

Closing Thoughts

By enabling seamless communication between different blockchains, LayerZero addresses one of the most pressing challenges in the blockchain space. Its innovative use of Ultra Light Nodes, relayers, and oracles sets it apart from traditional blockchain bridges, offering a more efficient, secure, and scalable solution.

Further Reading

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