Alloy Book

Example: interact_with_abi

Example

To run this example:

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

//! Example of generating code from ABI file using the `sol!` macro to interact with the contract.

use alloy::{node_bindings::Anvil, providers::ProviderBuilder, sol};
use eyre::Result;

// Codegen from ABI file to interact with the contract.
sol!(
    #[allow(missing_docs)]
    #[sol(rpc)]
    IWETH9,
    "examples/abi/IWETH9.json"
);

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

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

    // Create a contract instance.
    let contract = IWETH9::new("0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2".parse()?, provider);

    // Call the contract, retrieve the total supply.
    let IWETH9::totalSupplyReturn { _0 } = contract.totalSupply().call().await?;

    println!("WETH total supply is {_0}");

    Ok(())
}

Find the source code on Github here.