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tx_basic_frontier.rs
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tx_basic_frontier.rs
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//! Example to use subxt to talk to substrate-based nodes with ethereum accounts
//! which is not the default for subxt which is why we need to provide a custom config.
//!
//! This example requires to run a local frontier/moonbeam node to work.
#![allow(missing_docs)]
use subxt::OnlineClient;
use subxt_signer::eth::{dev, AccountId20, Signature};
#[subxt::subxt(runtime_metadata_path = "../artifacts/frontier_metadata_small.scale")]
mod eth_runtime {}
enum EthRuntimeConfig {}
impl subxt::Config for EthRuntimeConfig {
type Hash = subxt::utils::H256;
type AccountId = AccountId20;
type Address = AccountId20;
type Signature = Signature;
type Hasher = subxt::config::substrate::BlakeTwo256;
type Header =
subxt::config::substrate::SubstrateHeader<u32, subxt::config::substrate::BlakeTwo256>;
type ExtrinsicParams = subxt::config::SubstrateExtrinsicParams<Self>;
type AssetId = u32;
}
// This helper makes it easy to use our `AccountId20`'s with generated
// code that expects a generated `eth_runtime::runtime_types::fp_account:AccountId20` type.
impl From<AccountId20> for eth_runtime::runtime_types::fp_account::AccountId20 {
fn from(a: AccountId20) -> Self {
eth_runtime::runtime_types::fp_account::AccountId20(a.0)
}
}
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let api = OnlineClient::<EthRuntimeConfig>::from_insecure_url("ws://127.0.0.1:9944").await?;
let alith = dev::alith();
let baltathar = dev::baltathar();
let dest = baltathar.account_id();
println!("baltathar pub: {}", hex::encode(baltathar.public_key().0));
println!("baltathar addr: {}", hex::encode(dest));
let balance_transfer_tx = eth_runtime::tx()
.balances()
.transfer_allow_death(dest.into(), 10_001);
let events = api
.tx()
.sign_and_submit_then_watch_default(&balance_transfer_tx, &alith)
.await?
.wait_for_finalized_success()
.await?;
let transfer_event = events.find_first::<eth_runtime::balances::events::Transfer>()?;
if let Some(event) = transfer_event {
println!("Balance transfer success: {event:?}");
}
Ok(())
}