Steel History

# use alloy::providers::ProviderBuilder;
# use alloy::primitives::Address;
# use risc0_steel::{ethereum::{EthEvmEnv, ETH_MAINNET_CHAIN_SPEC}, host::BlockNumberOrTag, Contract};
# use url::Url;
# async fn preflight(latest: u64, beacon_api_url: Url, rpc_url: Url) -> Result<(), Box<dyn std::error::Error>> {
# let provider = ProviderBuilder::new().connect_http(rpc_url);
# let token_contract = Address::ZERO;
let builder = EthEvmEnv::builder()
    .provider(&provider)
    .block_number(latest - 8191) // execution block
    .beacon_api(beacon_api_url)
    .commitment_block_number(latest - 1) // Steel commitment block
    .chain_spec(&ETH_MAINNET_CHAIN_SPEC);

let mut env = builder.build().await?;

// Preflight the call at the execution block.
let mut contract = Contract::preflight(token_contract, &mut env);
# Ok(())
# }