Rust SDK：模拟交易

模拟交易可在不支付费用的情况下预览提交交易的成本和效果。可用于估算费用、测试交易，或查看可能的输出。

要模拟交易，请传入账户和 payload：

use aptos_sdk::{Aptos, AptosConfig, account::Ed25519Account, transaction::EntryFunction};

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let aptos = Aptos::new(AptosConfig::devnet())?;
    let sender = Ed25519Account::generate();
    let recipient = Ed25519Account::generate();

    aptos
        .fund_account(sender.address(), 1_000_000_000)
        .await?;

    let payload = EntryFunction::apt_transfer(recipient.address(), 10_000_000)?;
    let result = aptos.simulate(&sender, payload.into()).await?;

    println!("Success: {}", result.success());
    println!("Gas used: {}", result.gas_used());
    println!("Gas unit price: {}", result.gas_unit_price());
    println!("VM status: {}", result.vm_status());

    Ok(())
}

也可以带安全缓冲估算 Gas，或模拟已签名交易：

let estimated_gas = aptos.estimate_gas(&sender, payload.clone().into()).await?;
let signed = aptos_sdk::transaction::builder::sign_transaction(&raw_txn, &sender)?;
let result = aptos.simulate_signed(&signed).await?;

完整的构建、模拟和提交示例如下，见 这里。

也可以通过以下指南了解如何模拟更高级的交易：

• Sponsored Transactions
• Multi-Agent Transactions