### Local Development Workflow for JavaScript Client

Source: https://github.com/solana-program/system/blob/main/clients/js/README.md

Provides a sequence of commands to set up and test the JavaScript client locally. This includes starting a validator, navigating to the client directory, installing dependencies, building the client, and running tests.

```shell
# Start the validator.
pnpm validator:restart

# Go into the client directory and run the tests.
cd clients/js
pnpm install
pnpm build
pnpm test
```

--------------------------------

### Install Dependencies

Source: https://github.com/solana-program/system/blob/main/README.md

Installs all NPM dependencies required to access the scripts and tools provided by the project template.

```sh
pnpm install
```

--------------------------------

### Start Local Solana Validator

Source: https://github.com/solana-program/system/blob/main/README.md

Starts the local Solana validator. If a validator is already running, this command will be skipped by default.

```shell
pnpm validator:start
```

--------------------------------

### Run JavaScript Client Tests

Source: https://github.com/solana-program/system/blob/main/clients/js/README.md

Executes tests for the JavaScript client by starting a local validator if necessary. This command is run from the repository root.

```shell
pnpm clients:js:test
```

--------------------------------

### Build and Test Rust Client

Source: https://github.com/solana-program/system/blob/main/clients/rust/README.md

This command builds and tests the generated Rust client for the Solana System program. It starts a local validator if one is not running and executes the tests.

```sh
pnpm clients:js:test
```

--------------------------------

### Create Account with Solana System Program

Source: https://github.com/solana-program/system/blob/main/interface/README.md

Provides a Rust function to create a new Solana account using the System program. It calculates the required rent, constructs the create account instruction, and sends a signed transaction.

```rust
use solana_rpc_client::rpc_client::RpcClient;
use solana_sdk::{
    signature::{Keypair, Signer},
    transaction::Transaction,
};
use solana_system_interface::instruction;
use anyhow::Result;

fn create_account(
    client: &RpcClient,
    payer: &Keypair,
    new_account: &Keypair,
    owning_program: &Pubkey,
    space: u64,
) -> Result<()> {
    let rent = client.get_minimum_balance_for_rent_exemption(space.try_into()?)?;
    let instr = instruction::create_account(
        &payer.pubkey(),
        &new_account.pubkey(),
        rent,
        space,
        owning_program,
    );

    let blockhash = client.get_latest_blockhash()?;
    let tx = Transaction::new_signed_with_payer(
        &[instr],
        Some(&payer.pubkey()),
        &[payer, new_account],
        blockhash,
    );

    let _sig = client.send_and_confirm_transaction(&tx)?;

    Ok(())
}
```

--------------------------------

### Solana System Program Clients

Source: https://github.com/solana-program/system/blob/main/README.md

Information about the available clients for the Solana System program. Links are provided for further details on each client's usage and features.

```APIDOC
JS Client:
  Description: Client for interacting with the Solana System program using JavaScript.
  Link: ./clients/js

Rust Client:
  Description: Client for interacting with the Solana System program using Rust.
  Link: ./clients/rust
```

--------------------------------

### Add Solana System Interface Dependency

Source: https://github.com/solana-program/system/blob/main/interface/README.md

Demonstrates how to add the solana-system-interface crate to a Rust project using Cargo, enabling the bincode feature for instruction constructors.

```bash
cargo add solana-system-interface --features bincode
```

--------------------------------

### Transfer Lamports with Solana System Program

Source: https://github.com/solana-program/system/blob/main/interface/README.md

Illustrates a Rust function for transferring lamports between Solana accounts using the System program. It generates the transfer instruction and submits a signed transaction.

```rust
use solana_rpc_client::rpc_client::RpcClient;
use solana_pubkey::Pubkey;
use solana_sdk::{
    signature::{Keypair, Signer},
    transaction::Transaction,
};
use solana_system_interface::instruction;
use anyhow::Result;

fn transfer(
    client: &RpcClient,
    from: &Keypair,
    recipient: &Pubkey,
    lamports: u64,
) -> Result<()> {
    let instr = instruction::transfer(
        &from.pubkey(),
        recipient,
        lamports,
    );

    let blockhash = client.get_latest_blockhash()?;
    let tx = Transaction::new_signed_with_payer(
        &[instr],
        Some(&from.pubkey()),
        &[from],
        blockhash,
    );

    let _sig = client.send_and_confirm_transaction(&tx)?;

    Ok(())
}
```

--------------------------------

### Generate Clients

Source: https://github.com/solana-program/system/blob/main/README.md

Generates clients for the Solana System program. This command is essential for interacting with the program using generated code.

```sh
pnpm generate:clients
```

--------------------------------

### JavaScript Client Linting and Formatting

Source: https://github.com/solana-program/system/blob/main/clients/js/README.md

Utility scripts for maintaining code quality in the JavaScript client. Includes commands for linting and fixing linting errors, as well as formatting code and fixing formatting issues.

```shell
pnpm lint
pnpm lint:fix
pnpm format
pnpm format:fix
```

--------------------------------

### Restart Local Solana Validator

Source: https://github.com/solana-program/system/blob/main/README.md

Forces the local Solana validator to restart, even if one is already running. This is useful for ensuring a clean state.

```shell
pnpm validator:restart
```

--------------------------------

### Stop Local Solana Validator

Source: https://github.com/solana-program/system/blob/main/README.md

Stops the currently running local Solana validator.

```shell
pnpm validator:stop
```

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