Alloy Book

Example: deploy_from_bytecode

Example

To run this example:

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

//! Example of deploying a contract at runtime from Solidity bytecode to Anvil and interacting with
//! it.

use alloy::{
    hex,
    network::{ReceiptResponse, TransactionBuilder},
    primitives::U256,
    providers::{Provider, ProviderBuilder},
    rpc::types::TransactionRequest,
    sol,
};
use eyre::Result;

// If you have the bytecode known at build time, use the `deploy_from_contract` example.
// This method benefits from using bytecode at runtime, e.g., from newly deployed contracts, to
// analyze the behavior.
sol! {
    #[allow(missing_docs)]
    #[sol(rpc)]
    contract Counter {
        uint256 public number;

        function setNumber(uint256 newNumber) public {
            number = newNumber;
        }

        function increment() public {
            number++;
        }
    }
}

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

    // Deploy the `Counter` contract from bytecode at runtime.
    let bytecode = hex::decode(
        // solc v0.8.26; solc Counter.sol --via-ir --optimize --bin
        "6080806040523460135760df908160198239f35b600080fdfe6080806040526004361015601257600080fd5b60003560e01c9081633fb5c1cb1460925781638381f58a146079575063d09de08a14603c57600080fd5b3460745760003660031901126074576000546000198114605e57600101600055005b634e487b7160e01b600052601160045260246000fd5b600080fd5b3460745760003660031901126074576020906000548152f35b34607457602036600319011260745760043560005500fea2646970667358221220e978270883b7baed10810c4079c941512e93a7ba1cd1108c781d4bc738d9090564736f6c634300081a0033"
    )?;
    let tx = TransactionRequest::default().with_deploy_code(bytecode);

    // Deploy the contract.
    let receipt = provider.send_transaction(tx).await?.get_receipt().await?;

    let contract_address = receipt.contract_address().expect("Failed to get contract address");
    let contract = Counter::new(contract_address, &provider);
    println!("Deployed contract at address: {}", contract.address());

    // Set number
    let builder = contract.setNumber(U256::from(42));
    let tx_hash = builder.send().await?.watch().await?;

    println!("Set number to 42: {tx_hash}");

    // Increment the number to 43.
    let builder = contract.increment();
    let tx_hash = builder.send().await?.watch().await?;

    println!("Incremented number: {tx_hash}");

    // Retrieve the number, which should be 43.
    let builder = contract.number();
    let number = builder.call().await?.number.to_string();

    println!("Retrieved number: {number}");

    Ok(())
}

Find the source code on Github here.