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An onchain credit vault pools or routes deposits into lending markets. Borrowers pay interest for using the supplied assets, and the vault’s rules determine how that interest, fees, losses, and withdrawals are reflected for depositors. You usually receive shares or a receipt token for your claim—but neither the token nor a displayed yield guarantees that you can withdraw immediately or recover your full deposit.
What an onchain credit vault does
A credit vault is software that accepts assets and applies rules for making them available to borrowers. The label “vault” does not, by itself, tell you who chooses the borrowers, what collateral they need, or how lending decisions are made. A vault might allocate deposits among configured collateralized markets; another design may restrict borrowers or give a manager a bounded role in configuring markets.
In collateralized lending, a borrower posts eligible assets and borrows within the market’s risk limits. The collateral and liquidation rules are intended to reduce losses if the borrower cannot repay, but they cannot eliminate that possibility. As the Bank for International Settlements explains in its overview of DeFi architecture, smart contracts implement services across settlement, application, and interface layers; composability between these layers can enable new services while also creating pathways for risk to spread. BIS: The Technology of Decentralized Finance (DeFi).
What happens after you deposit
- You supply an asset. You select an asset accepted by the vault and authorize the deposit in your wallet. The transaction interacts with the vault’s contracts and may require a separate token approval.
- You receive a claim token. Many vaults issue shares or receipt tokens that represent a proportional claim on the vault’s assets. The exact token and accounting rules depend on the product.
- The vault makes funds available for lending. Depending on its design, it may lend into one market or allocate across configured markets. Borrowers use available assets under those markets’ rules.
- Interest and other changes affect the accounting. Borrower interest can increase the assets attributed to the vault and, in some share-based designs, the assets represented by each share. Fees, losses, or other product-specific adjustments can reduce the net amount attributable to depositors.
- You redeem under the vault’s withdrawal rules. You exchange shares or receipts for the underlying asset, subject to available liquidity and any applicable limits, queues, or other terms.
For example, Euler’s Euler Vault Kit (EVK) uses ERC-4626 vaults extended for lending and borrowing. Its documentation describes shares as proportional claims on vault assets. That is an example of one design, not a definition that applies to every credit vault. Euler Vault Kit: Overview.
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How a vault generates returns
The basic source of lending yield is borrower-paid interest: depositors supply capital, and borrowers pay to use it. In algorithmic lending markets, the rate can respond to supply, demand, and utilization—the share of available capital currently borrowed. When utilization rises, fewer assets may be available to lend or withdraw, and a market’s interest-rate model may raise the borrowing rate. Euler describes a common model that becomes steeper after a target utilization point; actual models and settings vary by market.
A vault that allocates across several markets can reflect the rates and conditions of those markets rather than one uniform lending rate. Fees reduce the return reaching depositors. Token incentives may add to a quoted target or be paid in a different asset, whose value can change. The result is that a displayed APY is a changing estimate tied to a particular vault and time—not a promise of future income or principal preservation.
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Do not infer a specific vault’s current APY, utilization, fees, or allocations from general mechanics. Those values are vault-specific and can change; check the vault’s live interface, terms, and relevant contract or market data for a dated view.
Why the share or receipt token is not a guarantee
A share or receipt token records a claim according to the vault’s accounting rules. Its redemption value can change as interest accrues, fees are charged, assets are lost, or other adjustments occur. Holding the token does not mean the underlying assets are all sitting idle and ready to return on demand; some may be lent out. Nor does the token itself guarantee that the vault will return the original deposit or that redemption will be immediate.
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Product terms can make the distinction explicit. Bitwise’s Lending Vault terms, last modified September 23, 2026, describe receipt tokens as proportional claims and state that redemptions depend on available liquidity. The terms also describe that platform’s yield as borrower-paid, algorithmically determined interest net of applicable fees, and its post-deposit allocation as not under discretionary control by a person. These are statements about Bitwise’s product, not universal rules for all vaults. Bitwise Onchain: Terms of Use — Schedule A: Lending Vault Terms.
Withdrawals can depend on liquidity
When borrowers have used much of a pool’s capital, a vault may not have enough idle assets to satisfy every withdrawal immediately. Redemption can depend on borrowers repaying, new deposits arriving, or other liquidity becoming available. Some products describe ordinary withdrawals as typically immediate while disclosing exceptions; that wording is not the same as an unconditional guarantee.
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Before depositing, look for the actual vault’s redemption process: whether withdrawals are limited, queued, processed in cycles, or dependent on available cash; what happens during high utilization; and whether the stated timing is a commitment or only typical behavior. “Onchain” describes where the rules and transactions operate, not how quickly liquid assets will be available.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How vaults can differ
Two products called credit vaults may expose depositors to different borrowers, collateral, market configurations, controls, and withdrawal terms. For instance, Coinbase’s customer guide describes a Morpho-powered USDC lending implementation with prime and high-yield vault choices, variable market rates, and different collateral and risk profiles. It also says access depends on location and account eligibility. Those details describe Coinbase’s offering as presented in its guide; they should not be generalized to every Morpho vault or every lender. Coinbase: Crypto-backed lending introduction.
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When comparing actual vaults, inspect the following rather than ranking them by headline APY alone:
- Yield source and rate behavior: borrower interest, the utilization model, market allocation, any incentives, and whether a quoted rate is current or historical.
- Borrowers and collateral: who can borrow, which assets qualify as collateral, the relevant borrowing and liquidation limits, and concentration in a particular market or asset.
- Liquidity and redemption: available cash, utilization, withdrawal limits or queues, and whether withdrawal timing is guaranteed or described as typical.
- Technical and administrative controls: contract design, oracles, upgradeability, governance, administrators, parameter setters, audits, and emergency controls. Immutability can remove some change authorities while also limiting recovery options.
- Net return and access: fees, incentive-token exposure, supported assets and networks, and location or account eligibility.
Risks that can affect your deposit
- Smart-contract or dependency failure: a bug, exploit, or failure in a protocol the vault depends on can impair or drain assets.
- Bad debt after collateral problems: a sharp collateral-price decline, market gap, or inadequate liquidation liquidity can leave a borrower’s debt insufficiently covered and reduce lender claims.
- Withdrawal delays: high utilization or many simultaneous withdrawal requests can leave too little liquidity for immediate redemption.
- Governance or configuration changes: changes to collateral, rate models, fees, caps, or protocol operation can alter the vault’s risk and returns. Check who has authority to make those changes.
- Asset and incentive exposure: a stablecoin can lose its peg, collateral can be volatile, and rewards paid in another token can fluctuate in value.
- Changing income and possible principal loss: borrower demand, market conditions, configuration, fees, and losses all affect realized results. Yield is not guaranteed, and deposited principal can be lost.
Collateral requirements and liquidation mechanisms are safeguards, not insurance. Likewise, an audit or a particular governance design cannot by itself establish that a vault is safe or liquid.
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