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

# Developer hub

- [Key Data Structures and Epoch mechanism](https://docs.lagoon.finance/developer-hub/key-data-structures-and-epoch-mechanism.md)
- [Smart Contract Reference](https://docs.lagoon.finance/developer-hub/smart-contract-reference.md): Every external/public entry point on the v0.6.0 vault implementation, grouped by caller.
- [Lagoon SDKs](https://docs.lagoon.finance/developer-hub/lagoon-sdks.md)
- [Integration](https://docs.lagoon.finance/developer-hub/integration.md)
- [Vault state](https://docs.lagoon.finance/developer-hub/integration/vault-state.md)
- [Get a user position](https://docs.lagoon.finance/developer-hub/integration/get-a-user-position.md)
- [Async deposit flow](https://docs.lagoon.finance/developer-hub/integration/async-deposit-flow.md)
- [Synchronous deposit flow](https://docs.lagoon.finance/developer-hub/integration/synchronous-deposit-flow.md): This page will guide you through activating synchronous deposits.
- [Vault Subgraphs](https://docs.lagoon.finance/developer-hub/integration/vault-subgraphs.md)
- [Vaults Frontend Integration](https://docs.lagoon.finance/developer-hub/integration/vaults-frontend-integration.md)
- [APR computations](https://docs.lagoon.finance/developer-hub/integration/apr-computations.md): This page describes the various methods used to compute Lagoon Vaults APR.
- [Compute vault share valuation](https://docs.lagoon.finance/developer-hub/integration/compute-vault-share-valuation.md)
- [Lagoon API](https://docs.lagoon.finance/developer-hub/lagoon-api.md): Off-chain GraphQL API exposing vault state, user positions, and event history across all supported chains.
- [Common queries](https://docs.lagoon.finance/developer-hub/lagoon-api/common-queries.md): Copy-pasteable curl recipes for the queries integrators reach for first.
- [Conventions](https://docs.lagoon.finance/developer-hub/lagoon-api/conventions.md): Pagination, filtering, ordering, scalar formats, historical data, and indexing health.
- [Mutations](https://docs.lagoon.finance/developer-hub/lagoon-api/mutations.md): Updating off-chain vault metadata with an EIP-712 signature from the vault owner.