Test: Create client for bitcoind

Request a client from the BitcoinD-struct and use it in a test.

I now, the client is `sync` and it blocks the run-time.
However, we currently don't have an async client to work with.

@steven: It would be great if we would get

rust-bitcoin/rust-bitcoincore-rpc#294

Author: ErikDeSmedt

Cargo.lock

@@ -6,6 +6,7 @@ edition = "2021"
 [dependencies]
 anyhow.workspace= true
 bitcoin.workspace = true
+bitcoincore-rpc = "0.19.0"
 env_logger.workspace = true
 log.workspace = true
 portpicker = "0.1.1"

ark-testing/Cargo.toml

@@ -1,12 +1,14 @@
 use crate::daemon::{DaemonWrapper, DaemonHelper};
-use crate::constants::env::{BITCOIND_EXEC, TEST_LEAVE_INTACT};
+use crate::constants::env::BITCOIND_EXEC;
 
 use anyhow::Context;
 use std::path::PathBuf;
 use std::env::VarError;
 use which::which;
 use tokio::sync::broadcast;
 
+use bitcoincore_rpc::{Client as BitcoinDClient, Auth};
+
 pub struct BitcoinDHelper {
 	name : String,
 	bitcoind_exec: PathBuf,
@@ -55,6 +57,27 @@ impl BitcoinD {
 		DaemonWrapper::wrap(inner)
 	}
 
+	pub fn sync_client(&self) -> anyhow::Result<BitcoinDClient> {
+		let bitcoind_url = self.inner.bitcoind_url();
+		let auth = self.inner.auth();
+		let client = BitcoinDClient::new(&bitcoind_url, auth)?;
+		Ok(client)
+	}
+}
+
+impl BitcoinDHelper {
+
+	pub fn auth(&self) -> Auth {
+		let cookie = self.config.datadir
+			.join(&self.config.network)
+			.join(".cookie");
+
+			Auth::CookieFile(cookie)
+	}
+
+	pub fn bitcoind_url(&self) -> String {
+		format!("http://127.0.0.1:{}", self.state.rpc_port.expect("A port has been picked. Is bitcoind running?"))
+	}
 }
 
 impl DaemonHelper for BitcoinDHelper {
@@ -92,7 +115,7 @@ impl DaemonHelper for BitcoinDHelper {
 		Ok(())
 	}
 
-	async fn wait_for_init(&self, stdout_rx: &mut broadcast::Receiver::<String>, _: &mut broadcast::Receiver::<String>) -> anyhow::Result<()> {
+	async fn wait_for_init(&self, _: &mut broadcast::Receiver::<String>, _: &mut broadcast::Receiver::<String>) -> anyhow::Result<()> {
 		// TODO: We can find a better implementation here
 
 		// Sleeping 2 seconds is always sufficient

ark-testing/src/daemon/bitcoind.rs

@@ -1,5 +1,6 @@
-#[macro_use]
-extern crate log;
+extern crate bitcoincore_rpc;
+
+use bitcoincore_rpc::RpcApi;
 
 use ark_testing::daemon::bitcoind::{get_exe_path, BitcoinD, BitcoinDConfig};
 use ark_testing::daemon::Daemon;
@@ -19,9 +20,13 @@ async fn start_bitcoind() {
 		bitcoind_exe,
 		bitcoind_config
 	);
+
 	bitcoind.start().await.expect("bitcoind can start");
 
-	// TODO: Call getblockchain info to verify bitcoind is working correctly
+	let client = bitcoind.sync_client().expect("Client can be created");
+
+	let info = client.get_blockchain_info().expect("Get info about the blockchain");
+	assert_eq!(info.chain.to_string(), "regtest");
 }