Rust区块链开发库fuel-core-client的使用，Fuel Core客户端实现高性能区块链交互与节点管理

安装

在项目目录中运行以下Cargo命令：

cargo add fuel-core-client

或者将以下行添加到您的Cargo.toml中：

fuel-core-client = "0.46.0"

基本使用示例

以下是一个使用fuel-core-client与Fuel区块链网络交互的基本示例：

use fuel_core_client::{
    client::FuelClient,
    types::{TransactionStatus, Transaction},
};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // 创建Fuel客户端连接
    let client = FuelClient::new("http://localhost:4000")?;

    // 获取节点版本信息
    let node_info = client.node_info().await?;
    println!("Node version: {}", node_info.node_version);

    // 获取链状态
    let chain_info = client.chain_info().await?;
    println!("Current block height: {}", chain_info.latest_block.height);

    // 提交交易示例
    let tx = Transaction::default(); // 实际使用时需要构建真实的交易
    let tx_id = client.submit(&tx).await?;
    println!("Submitted transaction with ID: {}", tx_id);

    // 检查交易状态
    let status = client.transaction_status(&tx_id).await?;
    match status {
        TransactionStatus::Submitted { .. } => println!("Transaction is in mempool"),
        TransactionStatus::Success { .. } => println!("Transaction succeeded"),
        TransactionStatus::Failure { .. } => println!("Transaction failed"),
        TransactionStatus::SqueezedOut { .. } => println!("Transaction was squeezed out"),
    }

    Ok(())
}

高级功能示例

use fuel_core_client::{
    client::FuelClient,
    types::{
        Coin, Message, Transaction, Input, Output,
        TransactionBuilder, AssetId, Contract, ContractId
    },
};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let client = FuelClient::new("http://localhost:4000")?;

    // 构建一个复杂的交易
    let tx = TransactionBuilder::script(vec![], vec![])
        .gas_limit(1_000_000)
        .gas_price(0)
        .maturity(0)
        .add_input(Input::coin_signed(
            Default::default(),
            Default::default(),
            100,
            AssetId::default(),
            Default::default(),
            0,
            Default::default(),
        ))
        .add_output(Output::coin(
            Default::default(),
            100,
            AssetId::default(),
        ))
        .finalize();

    // 提交交易
    let tx_id = client.submit(&tx).await?;
    println!("Submitted transaction: {}", tx_id);

    // 获取合约信息
    let contract_id = ContractId::default(); // 实际使用时替换为真实的合约ID
    let contract = client.contract(&contract_id).await?;
    println!("Contract balance: {}", contract.balance);

    // 获取消息证明
    let message_id = Default::default(); // 实际使用时替换为真实的消息ID
    let proof = client.message_proof(&message_id).await?;
    println!("Message proof: {:?}", proof);

    Ok(())
}

节点管理示例

use fuel_core_client::client::FuelClient;

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let client = FuelClient::new("http://localhost:4000")?;

    // 获取节点健康状态
    let health = client.health().await?;
    println!("Node health: {}", health);

    // 获取节点配置
    let config = client.node_config().await?;
    println!("Node config: {:?}", config);

    // 获取节点指标
    let metrics = client.node_metrics().await?;
    println!("Node metrics: {:?}", metrics);

    Ok(())
}

完整示例代码

use fuel_core_client::{
    client::FuelClient,
    types::{
        Transaction, TransactionStatus, TransactionBuilder,
        Input, Output, AssetId, ContractId, Coin
    },
};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    // 初始化客户端连接
    let client = FuelClient::new("http://localhost:4000")?;

    // 1. 获取节点信息
    println!("=== 节点信息 ===");
    let node_info = client.node_info().await?;
    println!("节点版本: {}", node_info.node_version);
    
    // 2. 获取链状态
    let chain_info = client.chain_info().await?;
    println!("当前区块高度: {}", chain_info.latest_block.height);

    // 3. 构建并提交交易
    println!("\n=== 交易操作 ===");
    let tx = TransactionBuilder::script(vec![], vec![])
        .gas_limit(1_000_000)
        .gas_price(0)
        .maturity(0)
        .add_input(Input::coin_signed(
            Default::default(),
            Default::default(),
            100,
            AssetId::default(),
            Default::default(),
            0,
            Default::default(),
        ))
        .add_output(Output::coin(
            Default::default(),
            100,
            AssetId::default(),
        ))
        .finalize();

    let tx_id = client.submit(&tx).await?;
    println!("已提交交易ID: {}", tx_id);

    // 4. 检查交易状态
    let status = client.transaction_status(&tx_id).await?;
    match status {
        TransactionStatus::Submitted { .. } => println!("交易在内存池中"),
        TransactionStatus::Success { .. } => println!("交易成功"),
        TransactionStatus::Failure { .. } => println!("交易失败"),
        TransactionStatus::SqueezedOut { .. } => println!("交易被挤出"),
    }

    // 5. 节点管理功能
    println!("\n=== 节点管理 ===");
    let health = client.health().await?;
    println!("节点健康状态: {}", health);
    
    let metrics = client.node_metrics().await?;
    println!("节点指标: {:?}", metrics);

    Ok(())
}

关键特性

• 高性能异步接口
• 完整的Fuel区块链功能支持
• 简洁的API设计
• 完善的类型系统
• 与Fuel生态系统无缝集成

许可证

BUSL-1.1