> For the complete documentation index, see [llms.txt](https://docs.foreverlong.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.foreverlong.io/everlong.md).

# Everlong

Liquidity infrastructure for asset denominated yield

Everlong is a yield engine for hard assets, starting with BTC. You deposit BTC, your balance is measured in BTC, and yield is earned and paid in BTC.

The position is wrapped in a composable ERC-4626 share that can be deployed throughout DeFi.

Unlike traditional LP products, Everlong does not rely on external capital to form liquidity. It **finances** the other side of the pair rather than selling your deposit to fund it. This enables depositors to maintain 1:1 exposure to their assets while earning fee driven yield.

Everlong sits at the intersection of two structural problems in DeFi:

* the lack of sustainable, asset-denominated yield for long holders
* the expense of sourcing efficient stablecoin liquidity, which has historically capped LP growth

It solves both simultaneously by turning passive holdings into productive liquidity that scales with the position itself.

### At a glance

|                        |                                                                                |
| ---------------------- | ------------------------------------------------------------------------------ |
| **Deposit asset**      | cbBTC, on Base at launch. Will quickly scale to many venues chains and assets. |
| **Yield denomination** | The deposit asset                                                              |
| **Lock up**            | None. No epochs, no queue, no holding period                                   |
| **Withdrawal**         | Instant, from the vault's position                                             |
| **Fee structure**      | Performance fee on yield. No fixed or management fee.                          |
| **Financing**          | Morpho, Aave, Euler and established lending markets                            |

Everlong turns the deposit asset into productive liquidity without sacrificing exposure to it. It creates a new primitive for yield, offers composability for the depositor, and productive liquidity wherever it is deployed.