//! Example of using the `GasFiller` in the provider.

use alloy::{

consensus::Transaction,

network::TransactionBuilder,

primitives::{address, U256},

providers::{Provider, ProviderBuilder},

rpc::types::request::TransactionRequest,

};

use eyre::Result;

#[tokio::main]

async fn main() -> Result<()> {

// Spin up a local Anvil node.

// Ensure `anvil` is available in $PATH.

let provider = ProviderBuilder::new()

// You can disable the recommended fillers by calling the `disable_recommended_fillers()`

// and pick the fillers of your choice.

.disable_recommended_fillers()

// Add the `GasFiller` to the provider.

// It is generally recommended to use the recommended fillers which includes the GasFiller,

// enabled by building the provider using ProviderBuilder::new().

.with_gas_estimation()

.connect_anvil_with_wallet();

// Build an EIP-1559 type transaction to send 100 wei to Vitalik.

let vitalik = address!("d8dA6BF26964aF9D7eEd9e03E53415D37aA96045");

let tx = TransactionRequest::default()

.with_to(vitalik)

.with_value(U256::from(100))

// Notice that without the `NonceFiller`, you need to set `nonce` field.

.with_nonce(0)

// Notice that without the `ChainIdFiller`, you need to set the `chain_id` field.

.with_chain_id(provider.get_chain_id().await?);

// Send the transaction, the nonce (0) is automatically managed by the provider.

let builder = provider.send_transaction(tx.clone()).await?;

let node_hash = *builder.tx_hash();

let pending_tx =

provider.get_transaction_by_hash(node_hash).await?.expect("Pending transaction not found");

assert_eq!(pending_tx.nonce(), 0);

println!("Transaction sent with nonce: {}", pending_tx.nonce());

// Update the nonce and send the transaction again.

let tx = tx.with_nonce(1);

// Send the transaction, the nonce (1) is automatically managed by the provider.

let builder = provider.send_transaction(tx).await?;

let node_hash = *builder.tx_hash();

let pending_tx =

provider.get_transaction_by_hash(node_hash).await?.expect("Pending transaction not found");

assert_eq!(pending_tx.nonce(), 1);

println!("Transaction sent with nonce: {}", pending_tx.nonce());

Ok(())

}