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Anvil, explained simply. Start with the problem, then follow the idea.
What is Anvil?
Anvil is a protocol on Ethereum that lets people set aside digital assets to back financial commitments. It records which assets are committed and gives a designated recipient a way to claim the agreed credit under the contract’s rules.
Think of it as a way to turn “I can pay” into a commitment backed by assets that can be checked onchain.
Anvil introduction (opens in a new tab)Why is something like this needed?
A transaction often starts with a trust problem: one side wants to receive goods, services, or credit now, while the other wants confidence that payment will arrive later.
Pay everything upfront
The payer gives up access to money before the obligation is due.
Rely on a promise
The recipient takes the risk that the other party cannot or will not pay.
Use a guarantee
Collateral or a trusted intermediary provides backing for the commitment.
Traditional finance uses deposits, guarantees, and bank-issued letters of credit to address this. Anvil brings an approach based on verifiable collateral and programmable rules to Ethereum, where applications can check and use those commitments.
A business wants to reserve a service costing 1,000 USDC. The provider accepts an Anvil LOC for that amount. Instead of receiving the full payment immediately, the provider receives a collateral-backed right to claim credit under the LOC’s terms.
Illustrative example. Fees and the separate service agreement are omitted.This addresses payment and counterparty risk—the risk that the other party fails to meet an obligation. It does not remove smart contract, market, liquidity, or application risk.
The letter-of-credit model (opens in a new tab)What happens to the assets?
- 1
Deposit
Supported assets enter Anvil’s collateral vault.
- 2
Reserve
An authorized contract sets aside collateral for a commitment.
- 3
Use or release
Credit can be claimed, or collateral released when the contract allows.
The vault keeps track of two balances: available collateral is unreserved, while reserved collateral is already committed. Reserved assets cannot also be withdrawn as if they were free to use.
Applications need both protocol approval and the user’s authorization to reserve collateral. A collateral pool lets multiple accounts provide backing together. Time-based pools have withdrawal waiting periods defined by their rules.
What are LOCs and DLOCs?
A letter of credit (LOC) specifies who creates the commitment, who may redeem it, the credited asset and amount, and an expiration. The issuer supplies the backing; the beneficiary is the address entitled to claim the credit.
The backing matches the credit
The collateral and credited asset are the same token—for example, USDC backing credit denominated in USDC.
The backing and credit differ
The collateral is a different asset from the credited token. Extra backing is required because their relative values can move. At-risk collateral can be converted under the protocol’s rules.
Issuing credit is not the same as paying it. Redemption is the step where credited assets are claimed. A LOC can be partially redeemed, so its original size and its remaining credit can be different.
What happens if collateral prices fall?
A DLOC has collateral requirements and conversion thresholds. If the backing becomes at risk, conversion can exchange collateral for the credited asset. The outcome depends on market prices, available liquidity, and successful execution; a collateral-backed commitment is not a promise of zero risk.
Can the issuer cancel it at any time?
An active LOC gives rights to its beneficiary, so the issuer cannot simply take back the reserved backing whenever they choose. Cancellation, redemption, expiration, and collateral release follow the contract’s rules. Expiration alone does not automatically withdraw assets to a wallet.
Where does ANVL fit in?
Anvil is the protocol. ANVL is its governance token. Holders and their delegates participate in decisions about the protocol, including supported assets, limits, collateral settings, and upgrades.
Delegation assigns voting power to yourself or another address. Delegating to someone else does not transfer ownership of your tokens to them.
ANVL
The token used for Anvil governance.
AMP
The collateral token Flexa uses to secure its payments through Anvil.
Protocol TVL, issued credit, and ANVL’s market capitalization measure different things. More collateral or activity does not translate into a fixed token price, and owning ANVL does not give ownership of users’ vault deposits.
How did Anvil get here?
Anvil developed from a digital letter-of-credit concept into broader collateral infrastructure. These milestones show how the protocol has progressed.
- February 2024
Anvil is introduced
Anvil was introduced as a protocol for digital letters of credit. The central idea was to use digital assets to back commitments that other parties could verify and rely on.
Read the announcement (opens in a new tab) - June 2024
Governance takes shape
The foundation announced the initial ANVL token and governance contracts on Ethereum. This was an early stage of the rollout; the token and its original claim arrangements later evolved.
Read the announcement (opens in a new tab) - February 2025
Collateral infrastructure reaches applications
Flexa introduced Capacity v3 using Anvil’s time-based collateral pools, with Amp collateral stored in the Anvil vault. It is a concrete example of an application using Anvil underneath its own product.
Read the announcement (opens in a new tab) - August 2026
The protocol continues to evolve
Anvil announced execution of an omnibus LOC upgrade. Governance changes illustrate how supported assets, collateral rules, and contract behavior can develop over time.
Read the announcement (opens in a new tab)
Older material may describe previous contracts, token versions, or plans. Use current documentation and application terms for present-day behavior.
What could this look like going forward?
Anvil could sit behind products people already understand: paying a merchant, reserving a service, borrowing against assets, or guaranteeing a business payment. The application supplies the experience; Anvil supplies collateral and credit infrastructure.
Applications are using the building blocks
Flexa documents Anvil-powered payment collateral. Helva describes using Anvil to reserve collateral for loans. Other announced integrations have their own status and scope.
Explore integrations & sourcesMore ways to back a commitment
Broader use could include business guarantees, reservations, exchange credit, or transfers across platforms. These depend on applications being built, liquidity, adoption, and the rules governing each use case.
Uses described by Anvil (opens in a new tab)To follow progress, look for working integrations, repeat use, and actual credit activity. TVL is useful context, but prices can move it even when no assets enter or leave.
These are potential applications, not a promised roadmap or a forecast for ANVL’s price.
See the data on OverviewPrefer to watch?
Acronym Foundation’s four-part series with Tyler Spalding explores money, credit, and the ideas behind Anvil. Watch in order or choose a topic.
Watch Anvil: A Financial Evolution · 4 parts
Published December 2024–January 2025. Historical background; some product details have since changed.
An independent guide by AnvilRadar, with links to original sources. Reviewed September 19, 2026.
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