> For the complete documentation index, see [llms.txt](https://docs.rome.builders/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.rome.builders/id/kasus-penggunaan/defi-protocols.md).

# Protokol DeFi

Rome memungkinkan protokol DeFi EVM untuk berkomposisi secara atomik dengan ekosistem DeFi native Solana. Halaman ini membahas pola integrasi umum. Beberapa sudah aktif di Rome — Aave v3, Compound v3 (Aerarium), Uniswap V2/V3/V4, dan Rome DEX — lihat [Aplikasi di Rome](/id/aplikasi-di-rome/apps.md).

Kode di bawah ini bersifat ilustratif; nama antarmuka untuk program Solana pihak ketiga adalah contoh, bukan antarmuka SDK yang disertakan.

## Mengapa DeFi di Rome?

* **Akses likuiditas Solana** — Jupiter, Kamino, Drift, Meteora, Raydium, Orca
* **Komposabilitas atomik** — operasi DeFi multi-langkah dalam satu transaksi
* **Perkakas Solidity** — ekosistem pengembangan dan audit yang familiar
* **State bersama** — pengguna EVM dan Solana berbagi pool yang sama

## Pola 1: Protokol Peminjaman dengan Oracle Solana

```solidity
import {IAggregatorV3Interface} from "@rome-protocol/rome-solidity/contracts/oracle/IAggregatorV3Interface.sol";

contract RomeLending {
    IAggregatorV3Interface public priceFeed;

    constructor(address _priceFeed) {
        priceFeed = IAggregatorV3Interface(_priceFeed);
    }

    function getCollateralValue(uint256 amount) public view returns (uint256) {
        (, int256 price,,,) = priceFeed.latestRoundData();
        // Harga Pyth/Switchboard melalui Oracle Gateway
        // Antarmuka yang sama seperti Chainlink di Ethereum
        return (amount * uint256(price)) / 1e8;
    }
}
```

## Pola 2: Pengagregat DEX via CPI

```solidity
contract RomeSwap {
    function swap(
        bytes32 fromMint,
        bytes32 toMint,
        uint256 amount,
        uint256 minOut
    ) external {
        // CPI ke Jupiter/Raydium/Meteora
        // Semua likuiditas DEX Solana dapat diakses dari Solidity
        CpiProgram.invoke(JUPITER_PROGRAM, accounts, swapData);
    }
}
```

## Pola 3: Vault Hasil

```solidity
contract YieldVault {
    function deposit(uint256 amount) external {
        // Terima deposit USDC
        // CPI → Jupiter: tukar ke token optimal
        // CPI → Kamino: pasok sebagai jaminan
        // CPI → Drift: buka lindung nilai delta-netral
        // Semua atomik — satu tx, semuanya atau tidak sama sekali
    }
}
```

## Pola 4: Arbitrase Lintas Protokol

Menggunakan `RemusTx` (transaksi atomik lintas rollup):

1. Beli di DEX A pada rollup 1
2. Jual di DEX B pada rollup 2
3. Keduanya secara atomik — risiko eksekusi nol

## Implementasi referensi

Fork aplikasi Rome yang berfungsi alih-alih memulai dari halaman kosong:

* [**rome-dex**](https://github.com/rome-protocol/rome-dex) — AMM dua jalur; bawa ide baru dan terapkan untuk pengguna Solana dan EVM melalui satu pool.
* [**aerarium**](https://github.com/rome-protocol/aerarium) — UI peminjaman Compound v3 dua jalur.
* [**cardo**](https://github.com/rome-protocol/cardo) — portal distribusi aplikasi CPI (swap / lend / perps / compose).
* [**rome-aave-v3-demo**](https://github.com/rome-protocol/rome-aave-v3-demo) — UI peminjaman Aave v3.
* [**compound-on-rome-comet**](https://github.com/rome-protocol/compound-on-rome-comet) — kontrak pasar uang Comet.
* [**rome-oracle-gateway**](https://github.com/rome-protocol/rome-oracle-gateway) — sebuah aplikasi cross-VM dari nol: membaca akun harga Solana (Pyth, Switchboard), mempostingnya di EVM, dan menyediakannya ke Solidity melalui Chainlink standar `AggregatorV3Interface`.

## Terkait

* [Gerbang Oracle](/id/produk/oracle-gateway.md) — feed harga yang kompatibel dengan Chainlink
* [SDK Rome](/id/produk/rome-sdk.md) — antarmuka bertipe untuk protokol DeFi


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