> 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/panduan-pengembang/call-solana-from-evm.md).

# Panggil Solana dari EVM

Precompile Rome memungkinkan kontrak Solidity memanggil program Solana secara langsung. Panduan ini membahas mekanismenya.

## Prasyarat

* Antarmuka Rome Solidity dari publik [`rome-solidity`](https://github.com/rome-protocol/rome-solidity) repositori (publikasi npm tertunda) — antarmuka precompile berada di [`contracts/interface.sol`](https://github.com/rome-protocol/rome-solidity/blob/master/contracts/interface.sol)
* Kontrak Rome yang telah dideploy (lihat [Penerapan Solidity](/id/panduan-pengembang/deploy-solidity.md))

Tautkan setiap antarmuka ke alamat precompilenya:

```solidity
import {ICrossProgramInvocation, ISystemProgram, IHelperProgram}
    from "@rome-protocol/rome-solidity/contracts/interface.sol";

ICrossProgramInvocation constant CpiProgram    = ICrossProgramInvocation(0xFF00000000000000000000000000000000000008);
ISystemProgram          constant SystemProgram = ISystemProgram(0xFF00000000000000000000000000000000000007);
IHelperProgram          constant Helper        = IHelperProgram(0xFF00000000000000000000000000000000000009);
```

## Precompile CpiProgram

`CpiProgram` (`0xFF…08`) menjalankan CPI (`invoke` / `invoke_signed`) plus pintasan baca lintas-state (`account_info`, `account_data_at`, `account_u64_at`, `account_lamports`, `pdas_batch_derive`):

```solidity
// Panggil program Solana
CpiProgram.invoke(programId, accounts, instructionData);

// Panggil dengan penandatanganan PDA (kontrak Anda menandatangani sebagai PDA)
CpiProgram.invoke_signed(programId, accounts, data, seeds);
```

## Transfer lamport

Untuk transfer SOL/lamport dan SPL sederhana dari PDA pemanggil, gunakan precompile HelperProgram — tidak perlu CPI buatan tangan:

```solidity
contract Transfers {
    IHelperProgram constant Helper = IHelperProgram(0xFF00000000000000000000000000000000000009);

    // Transfer lamport ke PDA alamat EVM
    function transferSol(address to, uint64 lamports) external {
        Helper.transfer_lamports(to, lamports);
    }

    // Transfer token SPL dari PDA pemanggil
    function transferSpl(address to, uint64 tokens, bytes32 mint) external {
        Helper.transfer_spl(to, tokens, mint);
    }

    // Buat ATA pemanggil untuk sebuah mint
    function createAta(bytes32 mint) external {
        Helper.create_ata(msg.sender, mint);
    }
}
```

`transfer_spl` memiliki beberapa overload (termasuk varian delegate untuk `transferFrom` alur); lihat `interface.sol`. Pada jalur cached, gunakan `ISplCached` (`0xff…05`) / `IAssociatedSplCached` (`0xff…06`) sebagai gantinya — kontrak menggunakan satu jalur secara konsisten.

## Membaca data akun

Baca data akun Solana apa pun melalui pintasan baca CpiProgram:

```solidity
(
    uint64 lamports,
    bytes32 owner,
    bool isSigner,
    bool isWritable,
    bool executable,
    bytes memory data
) = CpiProgram.account_info(accountPubkey);
```

## Derivasi PDA

Temukan Program Derived Address dari Solidity melalui precompile System:

```solidity
ISystemProgram.Seed[] memory seeds = new ISystemProgram.Seed[](2);
seeds[0] = ISystemProgram.Seed("my-program-seed");
seeds[1] = ISystemProgram.Seed(abi.encodePacked(someValue));

(bytes32 pda, uint8 bump) = SystemProgram.find_program_address(targetProgramId, seeds);
```

## Konversi Base58

Konversi antara `bytes32` dan base58 (format alamat Solana):

```solidity
bytes memory base58Str = SystemProgram.bytes32_to_base58(pubkey);
bytes32 pubkey = SystemProgram.base58_to_bytes32(base58Bytes);
```

## Memanggil program Solana kustom

Untuk memanggil program Solana apa pun, buat sendiri daftar akun dan data instruksinya:

```solidity
contract CustomCPI {
    ICrossProgramInvocation constant CpiProgram = ICrossProgramInvocation(0xFF00000000000000000000000000000000000008);
    bytes32 constant MY_PROGRAM = 0x0000000000000000000000000000000000000000000000000000000000000000; // your Solana program ID

    function callMyProgram(bytes32 account1, bytes32 account2, bytes calldata ixData) external {
        ICrossProgramInvocation.AccountMeta[] memory accounts = new ICrossProgramInvocation.AccountMeta[](2);
        accounts[0] = ICrossProgramInvocation.AccountMeta(account1, false, true);
        accounts[1] = ICrossProgramInvocation.AccountMeta(account2, false, false);

        CpiProgram.invoke(MY_PROGRAM, accounts, ixData);
    }
}
```

## Batasan Utama

1. **Semua akun harus dideklarasikan sejak awal.** Transaksi Solana harus menyertakan setiap akun yang akan disentuh CPI — penemuan akun dinamis di dalam CPI tidak dimungkinkan.
2. **Batas kedalaman CPI: 4 tingkat.** Rome EVM → target Anda → panggilan target → satu lagi. Rencanakan kedalaman panggilan Anda.
3. **Pubkey Solana adalah `bytes32`,** bukan alamat Ethereum berukuran 20 byte.
4. **Data instruksi adalah byte mentah** dalam format yang diharapkan program target (biasanya Borsh, little-endian).

## Apa Selanjutnya

* **Lihat di aplikasi nyata** — [rome-dex](https://github.com/rome-protocol/rome-dex) (AMM dua jalur), [cardo](https://github.com/rome-protocol/cardo) (rute CPI ke Meteora / Marinade / Mango / Jupiter), dan [aerarium](https://github.com/rome-protocol/aerarium) memanggil Solana dari Solidity dalam produksi.
* [Panggil EVM dari Solana](/id/panduan-pengembang/call-evm-from-solana.md) — kebalikannya: kendalikan kontrak EVM dari dompet Solana
* [Interoperabilitas Token](/id/konsep-inti/token-interop.md) — cara ERC-20 dan token SPL bekerja bersama
* [Kendala](/id/konsep-inti/constraints.md) — kedalaman CPI dan batasan lainnya


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