//! This example shows how to run a custom dev node programmatically and submit a transaction
//! through rpc.

#![cfg_attr(not(test), warn(unused_crate_dependencies))]

use std::sync::Arc;

use futures_util::StreamExt;
use reth::{
    builder::{NodeBuilder, NodeHandle},
    providers::CanonStateSubscriptions,
    rpc::api::eth::helpers::EthTransactions,
    tasks::TaskManager,
};
use reth_chainspec::ChainSpec;
use reth_node_core::{args::RpcServerArgs, node_config::NodeConfig};
use reth_node_ethereum::EthereumNode;
use reth_primitives::{b256, hex, Genesis};

#[tokio::main]
async fn main() -> eyre::Result<()> {
    let tasks = TaskManager::current();

    // create node config
    let node_config = NodeConfig::test()
        .dev()
        .with_rpc(RpcServerArgs::default().with_http())
        .with_chain(custom_chain());

    let NodeHandle { node, node_exit_future: _ } = NodeBuilder::new(node_config)
        .testing_node(tasks.executor())
        .node(EthereumNode::default())
        .launch()
        .await?;

    let mut notifications = node.provider.canonical_state_stream();

    // submit tx through rpc
    let raw_tx = hex!("02f876820a28808477359400847735940082520894ab0840c0e43688012c1adb0f5e3fc665188f83d28a029d394a5d630544000080c080a0a044076b7e67b5deecc63f61a8d7913fab86ca365b344b5759d1fe3563b4c39ea019eab979dd000da04dfc72bb0377c092d30fd9e1cab5ae487de49586cc8b0090");

    let eth_api = node.rpc_registry.eth_api();

    let hash = eth_api.send_raw_transaction(raw_tx.into()).await?;

    let expected = b256!("b1c6512f4fc202c04355fbda66755e0e344b152e633010e8fd75ecec09b63398");

    assert_eq!(hash, expected);
    println!("submitted transaction: {hash}");

    let head = notifications.next().await.unwrap();

    let tx = head.tip().transactions().next().unwrap();
    assert_eq!(tx.hash(), hash);
    println!("mined transaction: {hash}");
    Ok(())
}

fn custom_chain() -> Arc<ChainSpec> {
    let custom_genesis = r#"
{
    "nonce": "0x42",
    "timestamp": "0x0",
    "extraData": "0x5343",
    "gasLimit": "0x1388",
    "difficulty": "0x400000000",
    "mixHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "coinbase": "0x0000000000000000000000000000000000000000",
    "alloc": {
        "0x6Be02d1d3665660d22FF9624b7BE0551ee1Ac91b": {
            "balance": "0x4a47e3c12448f4ad000000"
        }
    },
    "number": "0x0",
    "gasUsed": "0x0",
    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "config": {
        "ethash": {},
        "chainId": 2600,
        "homesteadBlock": 0,
        "eip150Block": 0,
        "eip155Block": 0,
        "eip158Block": 0,
        "byzantiumBlock": 0,
        "constantinopleBlock": 0,
        "petersburgBlock": 0,
        "istanbulBlock": 0,
        "berlinBlock": 0,
        "londonBlock": 0,
        "terminalTotalDifficulty": 0,
        "terminalTotalDifficultyPassed": true,
        "shanghaiTime": 0
    }
}
"#;
    let genesis: Genesis = serde_json::from_str(custom_genesis).unwrap();
    Arc::new(genesis.into())
}