fix: Convert vendor/pezkuwi-subxt from submodule to regular directory

vendor/pezkuwi-subxt/subxt/examples/tx_basic_frontier.rs

@@ -0,0 +1,56 @@
+//! 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 pezkuwi_subxt_core::utils::AccountId20;
+use pezkuwi_subxt_signer::eth::{Signature, dev};
+
+#[subxt::subxt(runtime_metadata_path = "../artifacts/frontier_metadata_small.scale")]
+mod eth_runtime {}
+
+enum EthRuntimeConfig {}
+
+impl subxt::Config for EthRuntimeConfig {
+    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;
+}
+
+#[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.public_key().to_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, 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(())
+}