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# System prepended metadata

title: Integration Guide
tags: [docs, ' developers']

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---
tags: docs, developers
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# Integration Guide
*In-progress by banteg, x48, luciano, tracheopteryx*

## Contract Registery

Our contract registry is in progress. For now see:
- https://feel-the-yearn.vercel.app/
- https://docs.yearn.finance/faq#lists-of-smart-contracts

## .Vault Registry Integration

- `vault.token()` is the underlying token
- `token.approve(vault, 2**256-1)` to approve a deposit 
- `vault.deposit(amount)` to deposit
- `vault.withdraw(amount)` to withdraw
- `vault.getPricePerFullShare()` to get the ratio to underlying token

### Planned Vault Registry Structure
![](https://i.imgur.com/xa0lgtd.jpg)

## .Graph Integrations

TBD

## .API Integrations

TBD
