Table of Contents
- Key Takeaways
- 1. ERC-4626: Standardizing Tokenized Shared Vaults & Its Limits
- 1.1 Shared Vaults: From Analog to Digital
- 1.2 ERC-4626 Standard
- 1.3 When Shared Vaults Aren't Shared
- 2. OVault: Giving ERC-4626 Omnichain Wings
- 2.1 Hub-and-Spoke for Better UX
- 2.2 Single-Transaction Deposits & Withdrawals
- 2.3 OVault Use Cases
- 3. Paradigm Shift: From Local Vaults to Cloud Vaults
- 4. Resource
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Key Takeaways
ERC-4626 standardized tokenized vaults, improving development efficiency and interoperability in DeFi. However, they remained tied to specific chains, leading to fragmented liquidity and inconvenient user experiences. As the multi-chain era unfolded, the idea of a “shared vault” became, in reality, non-shared.
OVault addresses these issues by combining a hub-and-spoke architecture with LayerZero’s omnichain technology. With a single transaction, users can access vault functions from any chain, while all assets concentrate in the hub-chain vault, maximizing capital efficiency.
This paradigm shift transforms tokenized vaults from being “Local” to “Cloud” opening opportunities for yield-generating stablecoins, RWAs, and cross-chain collateralized lending. While challenges around security, stability, and ecosystem participation remain, OVault has the potential to restore the true value of shared vaults in the multi-chain era and bring new economies of scale to DeFi.
1. ERC-4626: Standardizing Tokenized Shared Vaults & Its Limits
1.1 Shared Vaults: From Analog to Digital
The history of finance is closely tied to the history of “shared vaults,” which gather and allocate capital based on trust. Even with the rise of blockchain and DeFi, the concept of the shared vault has merely been re-implemented in a new form.
Source: jeollailbo.com | Introducing “Gye”
The earliest form of shared vaults was the credit union, built on the trust of communities. Members would deposit assets regularly, and the pooled funds were lent out to those in need at affordable interest rates. (In Korea, this exists in the form of “Gye”.)
As capitalism developed, banks such as JPMorgan Chase took over this role, pooling vast amounts of deposits and supplying them to where capital was needed, becoming representative examples of “centralized shared vaults.”
With the digital era, crowdfunding platforms like Kickstarter and P2P lending services began to partially replace banks, introducing users to “digital shared vaults.” These fintech platforms were far faster and more convenient than traditional institutions, but the structure of trust remained largely unchanged. Transaction records and funds still relied on centralized corporate servers, leaving users dependent on the policies and stability of those companies.
1.2 ERC-4626 Standard
In the Web3 era, shared vaults have transformed into tokenized shared vaults operated through smart contracts. Representative examples include Yearn.finance’s yVault, which automates yield farming strategies, Compound’s cTokens, which increase in exchange rate, and Aave’s aTokens, which increase in balance. These vault contracts issue share tokens when users deposit assets, representing proof of ownership. Beyond being mere receipts, these share tokens could be used as collateral or trading instruments across other DeFi protocols—showcasing composability, one of DeFi’s core values.
However, early tokenized vaults in DeFi lacked a unified standard, with each implementing vault mechanics differently. For instance, Compound’s tokens grew in value while Aave’s tokens increased in quantity. This inconsistency forced developers to write custom code for every integration, much like the days before USB-C when each device required a different charger—causing inefficiencies.
To solve this, ERC-4626 was introduced: a standardized interface for tokenized vaults. It defined core operations such as deposit, mint, withdraw, and redeem under a unified specification, enabling seamless interoperability across any vault implementation.
The value of this standardization is evident in adoption by major protocols. Yearn integrated ERC-4626 in its V3 upgrade, significantly expanding interoperability with other protocols. MakerDAO also leverages ERC-4626 vaults through D3M (Direct Deposit Dai Module), directly supplying liquidity and improving capital efficiency.
Ultimately, ERC-4626 resolved fragmentation among tokenized vaults and provided a common framework that allowed developers to innovate more easily. Beyond saving development resources, it has become critical infrastructure, enhancing liquidity and capital efficiency across the entire DeFi ecosystem.
1.3 When Shared Vaults Aren't Shared
While ERC-4626 solved fragmentation within a single blockchain, the expansion of the multi-chain environment exposed new limitations. Because smart contracts are bound to specific chains, the notion of a truly “shared” vault lost its meaning—leading to two major issues.
Liquidity Fragmentation
For example, if the same strategy vault is deployed separately on Ethereum, Arbitrum, and Optimism, in practice this creates three independent liquidity pools. Capital gets split, reducing overall efficiency and resulting in lower yields and higher slippage for users. This structural limitation prevents the optimization of returns through economies of scale.
Poor User Experience
If a user on Chain A wants to deposit assets into a vault with higher yields on Chain B, they must bridge assets, switch wallet networks, and prepare gas tokens for that chain—requiring at least three separate transactions. This complexity restricts the free flow of capital and ultimately acts as a barrier to growth for the DeFi ecosystem.
2. OVault: Giving ERC-4626 Omnichain Wings
2.1 Hub-and-Spoke for Better UX
OVault restores cross-chain freedom to ERC-4626 and solves the problem of fragmentation by adopting a hub-and-spoke model designed with user experience as the top priority.
The key advantage of this structure is that users can complete all financial activities with a single click, without ever leaving their native chain (spoke). For instance, whether a user is active on Ethereum, Base, or Arbitrum, all they need to do is press the familiar “deposit” button to place assets into a tokenized vault and receive corresponding share tokens in return.
In other words, the user never has to worry about the complex processes happening behind the scenes—such as assets being bridged, routed, or managed on another chain. All of this is abstracted away, leaving only a seamless, one-click experience.
The roles of each component in OVault’s architecture that make this seamless process possible are as follows:
Spoke Chains: The User’s Stage
Spoke chains are the main stage where users initiate and complete all interactions. From their preferred spoke chain (Ethereum, Arbitrum, etc.), users can deposit, withdraw, or redeem from a tokenized vault with just a single click—without visiting a bridge interface or approving multiple transactions. The outputs of these actions (deposit receipts or withdrawn assets) are also delivered directly back into the user’s wallet on the same spoke chain, keeping the entire experience localized to where the user already operates.
Hub Chain: The Invisible Engine*
The hub chain is the “invisible engine” that powers OVault’s simple and convenient user experience. While users never directly interact with it, it ensures efficiency and stability. Assets from all spoke chains are deposited into contracts deployed on the chosen hub chain, concentrating liquidity for higher capital efficiency and yield. Since all financial operations and contract executions occur exclusively on this hub chain, every user benefits from consistent rules and stronger reliability.
*Here, the hub chain is not fixed to a single blockchain—it is a conceptual role that can be strategically assigned to Ethereum, Arbitrum, or other EVM-compatible chains, depending on the vault’s purpose.
LayerZero Technologies That Make This Possible
What enables the seamless connection between hub and spokes—and makes the vault omnichain—is LayerZero’s technology:
OFT (Omnichain Fungible Token): OFT extends tokens originally confined to a single chain (e.g., ERC-20) into “native omnichain tokens” usable across multiple chains. There are two modes: native OFTs burn tokens on the sending chain and mint them on the receiving chain, keeping the supply unified. Alternatively, existing ERC-20s can use an OFT Adapter, which locks tokens on the sending chain and issues representative tokens on the receiving chain. Either way, total supply remains consistent, allowing users to move assets safely and seamlessly across chains as if they were on the same network.
Omnichain Composer: The Composer is key to OVault’s “single transaction” experience. When a user sends assets from a spoke chain, they aren’t just sending tokens—they also attach instructions such as: “Deposit this into the hub chain’s ERC-4626 vault and return the share tokens back to my original chain.” The Composer contract on the hub chain processes this message, deposits the assets, and sends the share tokens back. By chaining these complex steps together into one unified flow, the Composer enables a seamless one-click action for the user.
In conclusion, OVault’s hub-and-spoke structure allows users to remain comfortably in the spotlight on their spoke chains, while the hub chain and LayerZero’s OFT and Composer technologies work invisibly in the background. This division of roles delivers both maximum efficiency and the smoothest possible user experience.
2.2 Single-Transaction Deposits & Withdrawals
Let’s take a closer look at OVault’s maximized usability of tokenized vaults through usage scenarios.
2.2.1 Depositing Assets and Receiving Share Tokens on the Same Chain
In this scenario, the user deposits assets on the Arbitrum chain and receives the corresponding deposit receipt (share tokens) back on Arbitrum—the most basic case:
Deposit Request (Arbitrum): The user submits a transaction on Arbitrum to deposit assets. This request includes both the user’s assets and the destination chain for the share tokens (in this case, Arbitrum).
Asset Transfer to Hub (Cross-Chain): The assets are securely transferred to the hub chain via cross-chain messaging technology.
Automated Deposit Execution (Hub): Once the assets arrive at the hub chain, the Composer automatically deposits them into the ERC-4626 vault contract. This is where the assets are actually managed and yield is generated.
Share Token Issuance (Hub): The hub vault confirms the deposit and mints new share tokens of equivalent value, passing them to the Composer.
Share Token Transfer to Arbitrum (Cross-Chain): The Composer sends the newly minted share tokens back to the user’s original chain, Arbitrum.
Final Receipt (Arbitrum): The user safely receives the share tokens in their Arbitrum wallet. All of this is completed with just one transaction from the user.
2.2.2 Depositing Assets on Chain A and Receiving Share Tokens on Chain B
In this scenario, the user deposits assets on Arbitrum but wants to receive the deposit receipt (share tokens) on a completely different chain, Optimism:
Steps 1–4 (deposit request, asset transfer, automated deposit, share token issuance) follow the same process as in the previous scenario.
Share Token Delivery to Destination Chain (Cross-Chain): The Composer checks the user’s initial request and sends the issued share tokens to the destination chain, Optimism.
Final Receipt (Optimism): Although the transaction began on Arbitrum, the user ultimately receives their share tokens in their Optimism wallet.
2.2.3 Withdrawing the Original Assets (Redemption)
The redemption process—exchanging share tokens back for the underlying assets—follows nearly the same flow as the deposit process. The user returns their share tokens to the system, the Composer on the hub chain processes them, and the vault withdraws the equivalent underlying assets. These assets are then securely sent to the user’s chosen destination chain.
The only difference from the deposit flow is that instead of the deposit function, the redeem/withdraw function of the ERC-4626 contracts is used. Cross-chain technology is applied in the same way, ensuring a seamless and secure process.
2.3 OVault Use Cases
By breaking down inter-chain barriers and enabling free capital mobility, OVault serves as foundational infrastructure for DeFi products and services to operate more efficiently and at scale. This unlocks a wide range of use cases:
Yield-bearing Stablecoins: Traditional stablecoin projects faced inefficiencies due to fragmented liquidity, as each chain required its own separate pool. OVault consolidates assets from all chains into a single vault, unifying fragmented liquidity. This allows users to access the deepest liquidity and optimal yields from any chain, while protocols maximize capital efficiency.
Real World Assets (RWAs): Today, RWA issuers face high entry barriers, incurring significant upfront costs and effort to attract investors spread across multiple chains. With OVault, a single hub-chain vault becomes a universal gateway for raising capital from all connected chains. Issuers gain streamlined access to investor funds, while investors benefit from a unified, stable source of yield usable across chains.
Cross-chain Lending: In existing DeFi lending, assets are locked on a specific chain, forcing users into risky and complex bridging processes to use them as collateral elsewhere. OVault’s share tokens function as “omnichain assets,” recognized across all chains. This allows users to, for example, post assets on Chain A as collateral and borrow on Chain B—enabling seamless cross-chain capital movement and maximizing asset efficiency.
In short, OVault leverages LayerZero’s omnichain technology to aggregate liquidity from across chains into a single vault, expanding market potential while offering maximum compatibility and convenience for both users and developers.
3. Paradigm Shift: From Local Vaults to Cloud Vaults
In the past, creating a Word document required installing Microsoft Office directly on a local computer. The document could only be opened and edited on that device, and sharing it with others meant attaching the file to an email or using a USB drive.
Cloud services like Google Docs completely changed this paradigm. The actual documents and programs live on Google’s central servers, while users access the same document and functionality from any device—laptop, smartphone, or tablet—via a browser. There’s no need to manually transfer files or match environments; the service is available anytime, anywhere.
OVault brings this principle to DeFi, driving a paradigm shift. Traditional ERC-4626 vaults were tied to specific chains like Arbitrum or Optimism. To use them, users had to bridge assets and switch wallet networks—similar to using a “local program.”
By contrast, OVault transforms vaults into the equivalent of the “cloud.” Assets and core logic remain on the hub chain, but users can access all vault functions with a single transaction from any chain. This shift allows users to enjoy efficient financial services without cross-chain friction, while developers can innovate atop unified liquidity markets instead of fragmented ones.
Of course, realizing this vision comes with challenges: ensuring the security of the underlying messaging layer, mitigating risks of the hub chain and its smart contracts becoming single points of failure, and fostering active participation from the broader ecosystem.
Nevertheless, OVault’s approach—expanding capital from being confined to “Local” vaults into a “Cloud” paradigm—offers a chance for shared vaults to reclaim their original meaning in the multi-chain era. It signals the arrival of a new kind of economies of scale in DeFi, where shared liquidity and seamless interoperability unlock greater efficiency and opportunity.
4. Resource
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