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Encyclopedia DeFi · Entry 66

Wrapped assets: an interface change or a separate backing claim

AI-assisted research · separate automated verificationCorrections

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DeFi
Sources
4 cited records
Reading time
About 3 minutes
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Substantive update
In this article

At a glance

Key facts

Key facts for Wrapped assets: an interface change or a separate backing claim
FactDetailSource
WETH exampleThe reference wrapper credits deposits and returns ETH on withdrawal.[1]
InterfaceAn ERC-20 balance supports a common token API.[2]
Receipt wrapperwstETH represents stETH through a changing conversion rate.[3]
01

A wrapper can adapt an asset to a token interface

ETH is Ethereum’s native asset and is not itself an ERC-20 contract balance. The WETH9 reference implementation accepts ETH deposits and credits a token balance. Withdrawing debits that balance and returns ETH under the contract’s rules.

Ignoring transaction costs, depositing two ETH in that reference design credits two WETH units. That is a property of this implementation. It does not establish that every token bearing the WETH name uses the same contract or has the same backing.

02

Another wrapper can change the accounting display

wstETH wraps stETH into a non-rebasing token balance. The amount of stETH represented by each wrapper unit changes with the underlying accounting. Unwrapping returns the claim token; it is not the same operation as completing a staking withdrawal into native ETH.

An apparently static wallet quantity can therefore represent a changing quantity of the underlying receipt. When calculating a position, identify whether the number shown is wrapper units, underlying claim units or native assets.

03

A representation on another chain adds a verification step

A bridge may hold an asset on one chain and issue a representation elsewhere. Returning to the original asset requires that bridge’s verification and redemption process. Other arrangements rely on custodians or different mechanisms.

Identify the chain and contract, backing location, authorized minting power and exit route. A one-to-one unit convention is not proof that reserves remain available or that a market will trade at that ratio. Ticker equality is insufficient evidence of asset identity.

Direct answers

Questions people ask

Is unwrapping always the same as redeeming the original asset?

No. Unwrapping a receipt wrapper can return another claim token. Reaching the original asset may still require a staking withdrawal, bridge operation or custodian process.

Inspect the evidence

The answer and key facts have stable claim links. These records retain the scope and qualification when reused.

A wrapped asset represents another asset through a token interface or backing arrangement. A simple ETH wrapper holds ETH and issues an ERC-20 balance; a cross-chain representation may depend on a bridge or custodian. The word wrapped does not guarantee a shared redemption mechanism or a one-to-one market price.

Scope: DeFi. Verification: verified · 2026-10-02T15:08:18.373Z.

Link to this claim
WETH example: The reference wrapper credits deposits and returns ETH on withdrawal.

Scope: DeFi. Verification: verified · 2026-10-02T15:08:18.373Z.

Link to this claim
Interface: An ERC-20 balance supports a common token API.

Scope: DeFi. Verification: verified · 2026-10-02T15:08:18.373Z.

Link to this claim
Receipt wrapper: wstETH represents stETH through a changing conversion rate.

Scope: DeFi. Verification: verified · 2026-10-02T15:08:18.373Z.

Link to this claim
Revision history
  1. — First publication after primary-source research and independent automated verification.
  2. — Before first publication, independent review checked and revised: sources. Read the pinned WETH9 test/reference implementation deposit/withdraw, ERC-20 methods, wstETH wrap/unwrap and developer bridge models. The reference code is not misrepresented as proof of a particular live deployment. The receipt-wrapper example correctly ends with stETH, leaving ETH redemption separate. The QA does not generalize WETH mechanics, custody or one-to-one market pricing to every wrapped asset.

Source register

Sources and references

Retrieval dates and locators are recorded individually.
  1. WETH9 reference implementationUniswap repository

    ETH deposits mint WETH balances; withdrawal burns balance and returns ETH.

    Locator: deposit; withdraw; balanceOf · Version / scope: v2-periphery commit ed24991304291297c3b4a52818d02f46a17aa9a2 · Retrieved: 2026-10-02Open source
  2. ERC-20: Token StandardEthereum Improvement Proposals

    The token spending allowance is separate from a website connection.

    Locator: Methods: approve, allowance, transferFrom · Version / scope: ERC-20 final · Retrieved: 2026-10-02Open source
  3. wstETH wrapperLido contributors

    Fixed wrapper balances with changing stETH conversion rates.

    Locator: What is wrapped stETH (wstETH)?; wrap; unwrap · Retrieved: 2026-10-02Open source
  4. Introduction to blockchain bridgesethereum.org contributors

    Lock/mint, burn/mint and liquidity-based transfers have different trust assumptions.

    Locator: How do bridges work?; Bridge types; Risk with bridges · Retrieved: 2026-10-02Open source
How this article was made

Research and drafting use AI assistance. A separate automated review checks claims against primary sources; no external expert or named human review is implied. Publication, substantive editing, source retrieval and verification are recorded separately. This version was independently checked by an automated reviewer on 2 October 2026.

Editorial method and corrections

Degrees of Satoshi editorial project. “Wrapped assets: an interface change or a separate backing claim.” Published 2026-10-02; updated 2026-10-02. https://degreesofsatoshi.com/encyclopedia/wrapped-assets/