Alloy Book

Sending a legacy transaction

Example: send_legacy_transaction

Example

To run this example:

• Clone the examples repository: git clone git@github.com:alloy-rs/examples.git
• Run: cargo run --example send_legacy_transaction

//! Example showing how to send a legacy transaction.

use alloy::{
    network::TransactionBuilder,
    node_bindings::Anvil,
    primitives::U256,
    providers::{Provider, ProviderBuilder},
    rpc::types::TransactionRequest,
};
use eyre::Result;

#[tokio::main]
async fn main() -> Result<()> {
    // Spin up a local Anvil node.
    // Ensure `anvil` is available in $PATH.
    let anvil = Anvil::new().try_spawn()?;

    // Create a provider.
    let rpc_url = anvil.endpoint().parse()?;
    let provider = ProviderBuilder::new().on_http(rpc_url);

    // Create two users, Alice and Bob.
    let alice = anvil.addresses()[0];
    let bob = anvil.addresses()[1];

    // Build a transaction to send 100 wei from Alice to Bob.
    // The `from` field is automatically filled to the first signer's address (Alice).
    let tx = TransactionRequest::default()
        .with_to(bob)
        .with_nonce(0)
        .with_value(U256::from(100))
        .with_gas_price(20_000_000_000)
        .with_gas_limit(21_000);

    // Send the transaction and wait for the broadcast.
    let pending_tx = provider.send_transaction(tx).await?;

    println!("Pending transaction... {}", pending_tx.tx_hash());

    // Wait for the transaction to be included and get the receipt.
    let receipt = pending_tx.get_receipt().await?;

    println!(
        "Transaction included in block {}",
        receipt.block_number.expect("Failed to get block number")
    );

    assert_eq!(receipt.from, alice);
    assert_eq!(receipt.to, Some(bob));

    Ok(())
}

Find the source code on Github here.