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

# Prerequisites

> Everything you need before integrating IFÁ Labs price feeds: a Web3 wallet, testnet ETH on Base Sepolia, and a Solidity development toolchain.

Before you start integrating IFÁ Labs price feeds, you need three things: a compatible wallet, testnet ETH for Base Sepolia, and at least one development tool. This page walks through all of them.

If you're already set up for EVM development on Base, you can skip straight to [Get Your First Price](/get-your-first-price-on-chain).

## 1. Wallet

You need an Ethereum-compatible wallet to sign transactions and interact with Base.

**Recommended: MetaMask**

<Steps>
  <Step title="Install MetaMask">
    Download the browser extension or mobile app from [metamask.io](https://metamask.io). Use the official site — do not install from third-party sources.
  </Step>

  <Step title="Create or import a wallet">
    Follow the setup flow. Store your seed phrase offline and never share it.
  </Step>

  <Step title="Add Base networks">
    The easiest way is via [ChainList.org](https://chainlist.org) — search "Base" and click **Add to MetaMask**.

    Or configure manually:

    | Field        | Base Mainnet               | Base Sepolia                   |
    | ------------ | -------------------------- | ------------------------------ |
    | Network Name | Base                       | Base Sepolia                   |
    | RPC URL      | `https://mainnet.base.org` | `https://sepolia.base.org`     |
    | Chain ID     | `8453`                     | `84532`                        |
    | Currency     | ETH                        | ETH                            |
    | Explorer     | `https://basescan.org`     | `https://sepolia.basescan.org` |
  </Step>
</Steps>

**Alternatives:** Coinbase Wallet, Rainbow, or any WalletConnect-compatible wallet.

## 2. Testnet ETH

All development and testing should happen on **Base Sepolia** before touching mainnet. You'll need testnet ETH — it has no real value and is free to claim.

**Official Base Sepolia Faucet**

Visit [base.org/faucet](https://www.base.org/faucet), connect your wallet, and request tokens. Daily limits apply.

**Alternative Faucets**

| Faucet                                                              | Notes                         |
| ------------------------------------------------------------------- | ----------------------------- |
| [Alchemy Base Faucet](https://www.alchemy.com/faucets/base-sepolia) | Requires free Alchemy account |
| [QuickNode Faucet](https://faucet.quicknode.com/base/sepolia)       | No account required           |
| [Infura Faucet](https://www.infura.io/faucet/sepolia)               | Requires free Infura account  |

<Note>
  Mainnet interactions require real ETH on Base. IFÁ Labs price reads are view calls — they cost no gas. You only need ETH if you're deploying your own contracts that consume the feeds.
</Note>

## 3. Development Tools

Pick the tooling that fits your workflow. You don't need all of them — one is enough to get started.

| Tool          | Best For                                       | Setup                                                                        |
| ------------- | ---------------------------------------------- | ---------------------------------------------------------------------------- |
| **Remix IDE** | Quick prototyping, no local setup              | Visit [remix.ethereum.org](https://remix.ethereum.org) — runs in the browser |
| **Foundry**   | Fast testing, Rust-based, production workflows | `curl -L https://foundry.paradigm.xyz \| bash`                               |
| **Hardhat**   | JavaScript/TypeScript projects                 | `npm init -y && npm install --save-dev hardhat`                              |
| **Ethers.js** | Frontend integrations and scripts              | `npm install ethers`                                                         |
| **viem**      | Modern TypeScript-first alternative to ethers  | `npm install viem`                                                           |

**Recommendation:** If you're new to Base development, start with Remix — no local environment required. If you're building a production integration, use Foundry or Hardhat with a proper test suite.

## 4. Install the IFÁ Labs Interface Package

For Solidity projects, install the official interface package for type-safe contract interactions:

```bash theme={null}
npm install ifapricefeed-interface
```

This gives you:

* The complete `IIfaPriceFeed` Solidity interface
* Full struct and event type definitions
* The latest ABI

Import it directly in your contracts:

```solidity theme={null}
import "ifapricefeed-interface/IIfaPriceFeed.sol";
```

<Tip>
  Using Foundry? You can also install the interface as a lib dependency via `forge install IFA-Labs/IfaPriceFeed-interface` and reference it in your `remappings.txt`.
</Tip>

## You're Ready

Once your wallet is connected to Base Sepolia and you have testnet ETH, you're set. Head to the next page to fetch your first on-chain price.

<CardGroup cols={2}>
  <Card title="Get Your First Price" icon="bolt" href="/get-your-first-price-on-chain">
    Fetch a live stablecoin price from the IFÁ Labs oracle in minutes.
  </Card>

  <Card title="Contract Addresses" icon="file-contract" href="/contract-addresses">
    View all deployed contract addresses across supported networks.
  </Card>
</CardGroup>