# Yield sources \[Any on-chain yield behind one interface]

Every yield protocol has its own entry points, share math, capacity limits and timing. Railnet wraps each in a Vehicle speaking one lifecycle, [STEAM](/developers/contracts/steam-standard), so the source you offer is a configuration choice, not a new integration.

## Catalog

| Yield source | Category | Deposits | Withdrawals | Adapter |
|---|---|---|---|---|
| [Aave V3](/yield-sources/aave-v3) | Lending | Instant | Instant (pool liquidity) | `AaveV3Vehicle` |
| [Morpho Blue](/yield-sources/morpho-blue) | Lending markets | Instant | Instant (market liquidity) | `MorphoBlueVehicle` |
| [Morpho Vaults](/yield-sources/morpho-vaults) | Curated vaults (v1, v2) | Instant | Instant (vault liquidity) | `ERC4626Vehicle` |
| [Euler](/yield-sources/euler) | Euler Earn vaults | Instant | Instant (vault liquidity) | `ERC4626Vehicle` |
| [Ethena](/yield-sources/ethena) | Staking (sUSDe) | Instant | Cooldown, keeper-settled | `EthenaVehicle` |
| [Maple](/yield-sources/maple) | Institutional lending (Syrup) | Instant | Queued, keeper-settled | `SyrupVehicle` |
| [Centrifuge](/yield-sources/centrifuge) | Tokenized RWA | Queued | Queued | `ERC7540Vehicle` |
| [Any ERC-4626 vault](/yield-sources/erc-4626) | Standard | Instant | Instant | `ERC4626Vehicle` |
| [Any ERC-7540 vault](/yield-sources/erc-7540) | Standard | Queued | Queued | `ERC7540Vehicle` |
| [Advanced Strategies and RWA](/yield-sources/advanced-strategies-and-rwa) | Managed strategies, tokenized real-world assets | Queued | Queued | `ERC7540Vehicle` over a Specialized Vehicle |

Missing a protocol? [Request it](/yield-sources/request-a-protocol).

## How a protocol connects

A **native adapter** is written against the protocol's own contracts, for sources that are not vaults or that need specific handling: Aave V3 reserves, Morpho Blue markets, Ethena's sUSDe cooldown, Maple's Syrup withdrawal queue. Capacity checks mirror the protocol's real limits.

The **generic ERC-4626 adapter** covers synchronous tokenized vaults. Morpho Vaults, Euler Earn and most curated lending vaults need no new code: deploy a Vehicle pointing at the vault address. A variant tolerates unreliable `maxDeposit` and `maxRedeem` views.

The **generic ERC-7540 adapter** covers asynchronous vaults, Centrifuge included. The Vehicle batches user demand into one vault request and keepers claim the operator's settlement, so users see a pending deposit rather than a protocol queue.

## Next steps

<Cards>
  <Card title="Quick start" description="Deploy a Conduit on the source you picked." icon="rocket" to="/conduits/quick-start" />

  <Card title="Request a protocol" description="How an unlisted protocol gets added." icon="plus" to="/yield-sources/request-a-protocol" />

  <Card title="Deployed contracts" description="Factory addresses per network." icon="map-pin" to="/developers/contracts/deployments" />
</Cards>