> ## Documentation Index
> Fetch the complete documentation index at: https://docs.vanna.finance/llms.txt
> Use this file to discover all available pages before exploring further.

# Core Concepts

> Lending pools, cross-margin accounts, vTokens, health, oracles, and the integrations on Solana.

Vanna on Solana is a lending and margin protocol. Lenders supply USDC, USDT or SOL to pools. Traders borrow from those pools through one cross-margin account per wallet, and put the borrowed funds to work in whitelisted protocols: Jupiter and Titan swaps, Kamino lending, Phoenix perps, Perena's USD\* vaults, and Vanna's delta-neutral basis vaults. Every position counts toward one health factor.

The protocol is three programs: a **core** that only does accounting, an **oracle** that values every holding, and a **validator** that decides which external calls a margin account may make.

* [Protocol Architecture](https://docs.vanna.finance/solana/learn/protocol-architecture.md): the core and its two agents
* [Tokenized Stocks](https://docs.vanna.finance/solana/learn/tokenized-stocks.md): xStocks as collateral
* [Margin Accounts](https://docs.vanna.finance/solana/learn/margin-accounts.md): PDA custody and debt shares
* [Lending Pools](https://docs.vanna.finance/solana/learn/lending-pools.md) and [vTokens](https://docs.vanna.finance/solana/learn/vtokens.md): supply, borrowing, receipt value
* [Health Factor](https://docs.vanna.finance/solana/learn/health-factor.md) and [Liquidation](https://docs.vanna.finance/solana/learn/liquidation.md)
* [Interest Rate Model](https://docs.vanna.finance/solana/learn/interest-rate-model.md) and [Oracle System](https://docs.vanna.finance/solana/learn/oracle-system.md)
* [Composable Leverage](https://docs.vanna.finance/solana/learn/composable-leverage.md): what borrowed funds can do
* [Kamino Integration](https://docs.vanna.finance/solana/learn/kamino-integration.md), [Perps on Phoenix](https://docs.vanna.finance/solana/learn/perps-on-phoenix.md), [Yield Vaults](https://docs.vanna.finance/solana/learn/yield-vaults.md), [Predict](https://docs.vanna.finance/solana/learn/predict.md)

These pages describe `vanna-credit-layer` and `vanna-credit-backend` as deployed on the hosted Surfpool **mainnet fork** behind [test.vanna.finance](https://test.vanna.finance) (Solana in the chain switcher). They do not certify a public-mainnet launch.


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