- pub fn new(host: String, port: u16, rpc_user: String, rpc_password: String) ->
- std::io::Result<Self>
- {
- let http_endpoint = HttpEndpoint::for_host(host.clone()).with_port(port);
- let rpc_credentials = base64::encode(format!("{}:{}", rpc_user.clone(),
- rpc_password.clone()));
- let bitcoind_rpc_client = RpcClient::new(&rpc_credentials, http_endpoint)?;
- let client = Self {
- bitcoind_rpc_client: Mutex::new(bitcoind_rpc_client),
- host,
- port,
- rpc_user,
- rpc_password,
- runtime: Mutex::new(Runtime::new().unwrap()),
- };
- Ok(client)
- }
-
- pub fn get_new_rpc_client(&self) -> std::io::Result<RpcClient> {
- let http_endpoint = HttpEndpoint::for_host(self.host.clone()).with_port(self.port);
- let rpc_credentials = base64::encode(format!("{}:{}",
- self.rpc_user.clone(),
- self.rpc_password.clone()));
- RpcClient::new(&rpc_credentials, http_endpoint)
- }
-
- pub fn create_raw_transaction(&self, outputs: Vec<HashMap<String, f64>>) -> RawTx {
- let runtime = self.runtime.lock().unwrap();
- let mut rpc = self.bitcoind_rpc_client.lock().unwrap();
-
- let outputs_json = serde_json::json!(outputs);
- runtime.block_on(rpc.call_method::<RawTx>("createrawtransaction", &vec![serde_json::json!([]), outputs_json])).unwrap()
- }
-
- pub fn fund_raw_transaction(&self, raw_tx: RawTx) -> FundedTx {
- let runtime = self.runtime.lock().unwrap();
- let mut rpc = self.bitcoind_rpc_client.lock().unwrap();
-
- let raw_tx_json = serde_json::json!(raw_tx.0);
- runtime.block_on(rpc.call_method("fundrawtransaction", &[raw_tx_json])).unwrap()
- }
-
- pub fn sign_raw_transaction_with_wallet(&self, tx_hex: String) -> SignedTx {
- let runtime = self.runtime.lock().unwrap();
- let mut rpc = self.bitcoind_rpc_client.lock().unwrap();
-
- let tx_hex_json = serde_json::json!(tx_hex);
- runtime.block_on(rpc.call_method("signrawtransactionwithwallet",
- &vec![tx_hex_json])).unwrap()
- }
-
- pub fn get_new_address(&self) -> Address {
- let runtime = self.runtime.lock().unwrap();
- let mut rpc = self.bitcoind_rpc_client.lock().unwrap();
-
- let addr_args = vec![serde_json::json!("LDK output address")];
- let addr = runtime.block_on(rpc.call_method::<NewAddress>("getnewaddress", &addr_args)).unwrap();
- Address::from_str(addr.0.as_str()).unwrap()
- }
-
- pub fn get_blockchain_info(&self) -> BlockchainInfo {
- let runtime = self.runtime.lock().unwrap();
- let mut rpc = self.bitcoind_rpc_client.lock().unwrap();
-
- runtime.block_on(rpc.call_method::<BlockchainInfo>("getblockchaininfo",
- &vec![])).unwrap()
- }
+ pub async fn new(
+ host: String, port: u16, rpc_user: String, rpc_password: String,
+ ) -> std::io::Result<Self> {
+ let http_endpoint = HttpEndpoint::for_host(host.clone()).with_port(port);
+ let rpc_credentials =
+ base64::encode(format!("{}:{}", rpc_user.clone(), rpc_password.clone()));
+ let mut bitcoind_rpc_client = RpcClient::new(&rpc_credentials, http_endpoint)?;
+ let _dummy = bitcoind_rpc_client
+ .call_method::<BlockchainInfo>("getblockchaininfo", &vec![])
+ .await
+ .map_err(|_| {
+ std::io::Error::new(std::io::ErrorKind::PermissionDenied,
+ "Failed to make initial call to bitcoind - please check your RPC user/password and access settings")
+ })?;
+ let mut fees: HashMap<Target, AtomicU32> = HashMap::new();
+ fees.insert(Target::Background, AtomicU32::new(MIN_FEERATE));
+ fees.insert(Target::Normal, AtomicU32::new(2000));
+ fees.insert(Target::HighPriority, AtomicU32::new(5000));
+ let client = Self {
+ bitcoind_rpc_client: Arc::new(Mutex::new(bitcoind_rpc_client)),
+ host,
+ port,
+ rpc_user,
+ rpc_password,
+ fees: Arc::new(fees),
+ };
+ BitcoindClient::poll_for_fee_estimates(
+ client.fees.clone(),
+ client.bitcoind_rpc_client.clone(),
+ )
+ .await;
+ Ok(client)
+ }
+
+ async fn poll_for_fee_estimates(
+ fees: Arc<HashMap<Target, AtomicU32>>, rpc_client: Arc<Mutex<RpcClient>>,
+ ) {
+ tokio::spawn(async move {
+ loop {
+ let background_estimate = {
+ let mut rpc = rpc_client.lock().await;
+ let background_conf_target = serde_json::json!(144);
+ let background_estimate_mode = serde_json::json!("ECONOMICAL");
+ let resp = rpc
+ .call_method::<FeeResponse>(
+ "estimatesmartfee",
+ &vec![background_conf_target, background_estimate_mode],
+ )
+ .await
+ .unwrap();
+ match resp.feerate_sat_per_kw {
+ Some(feerate) => std::cmp::max(feerate, MIN_FEERATE),
+ None => MIN_FEERATE,
+ }
+ };
+
+ let normal_estimate = {
+ let mut rpc = rpc_client.lock().await;
+ let normal_conf_target = serde_json::json!(18);
+ let normal_estimate_mode = serde_json::json!("ECONOMICAL");
+ let resp = rpc
+ .call_method::<FeeResponse>(
+ "estimatesmartfee",
+ &vec![normal_conf_target, normal_estimate_mode],
+ )
+ .await
+ .unwrap();
+ match resp.feerate_sat_per_kw {
+ Some(feerate) => std::cmp::max(feerate, MIN_FEERATE),
+ None => 2000,
+ }
+ };
+
+ let high_prio_estimate = {
+ let mut rpc = rpc_client.lock().await;
+ let high_prio_conf_target = serde_json::json!(6);
+ let high_prio_estimate_mode = serde_json::json!("CONSERVATIVE");
+ let resp = rpc
+ .call_method::<FeeResponse>(
+ "estimatesmartfee",
+ &vec![high_prio_conf_target, high_prio_estimate_mode],
+ )
+ .await
+ .unwrap();
+
+ match resp.feerate_sat_per_kw {
+ Some(feerate) => std::cmp::max(feerate, MIN_FEERATE),
+ None => 5000,
+ }
+ };
+
+ fees.get(&Target::Background)
+ .unwrap()
+ .store(background_estimate, Ordering::Release);
+ fees.get(&Target::Normal).unwrap().store(normal_estimate, Ordering::Release);
+ fees.get(&Target::HighPriority)
+ .unwrap()
+ .store(high_prio_estimate, Ordering::Release);
+ tokio::time::sleep(Duration::from_secs(60)).await;
+ }
+ });
+ }
+
+ pub fn get_new_rpc_client(&self) -> std::io::Result<RpcClient> {
+ let http_endpoint = HttpEndpoint::for_host(self.host.clone()).with_port(self.port);
+ let rpc_credentials =
+ base64::encode(format!("{}:{}", self.rpc_user.clone(), self.rpc_password.clone()));
+ RpcClient::new(&rpc_credentials, http_endpoint)
+ }
+
+ pub async fn create_raw_transaction(&self, outputs: Vec<HashMap<String, f64>>) -> RawTx {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+
+ let outputs_json = serde_json::json!(outputs);
+ rpc.call_method::<RawTx>("createrawtransaction", &vec![serde_json::json!([]), outputs_json])
+ .await
+ .unwrap()
+ }
+
+ pub async fn fund_raw_transaction(&self, raw_tx: RawTx) -> FundedTx {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+
+ let raw_tx_json = serde_json::json!(raw_tx.0);
+ let options = serde_json::json!({
+ // LDK gives us feerates in satoshis per KW but Bitcoin Core here expects fees
+ // denominated in satoshis per vB. First we need to multiply by 4 to convert weight
+ // units to virtual bytes, then divide by 1000 to convert KvB to vB.
+ "fee_rate": self.get_est_sat_per_1000_weight(ConfirmationTarget::Normal) as f64 / 250.0,
+ // While users could "cancel" a channel open by RBF-bumping and paying back to
+ // themselves, we don't allow it here as its easy to have users accidentally RBF bump
+ // and pay to the channel funding address, which results in loss of funds. Real
+ // LDK-based applications should enable RBF bumping and RBF bump either to a local
+ // change address or to a new channel output negotiated with the same node.
+ "replaceable": false,
+ });
+ rpc.call_method("fundrawtransaction", &[raw_tx_json, options]).await.unwrap()
+ }
+
+ pub async fn send_raw_transaction(&self, raw_tx: RawTx) {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+
+ let raw_tx_json = serde_json::json!(raw_tx.0);
+ rpc.call_method::<RawTx>("sendrawtransaction", &[raw_tx_json]).await.unwrap();
+ }
+
+ pub async fn sign_raw_transaction_with_wallet(&self, tx_hex: String) -> SignedTx {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+
+ let tx_hex_json = serde_json::json!(tx_hex);
+ rpc.call_method("signrawtransactionwithwallet", &vec![tx_hex_json]).await.unwrap()
+ }
+
+ pub async fn get_new_address(&self) -> Address {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+
+ let addr_args = vec![serde_json::json!("LDK output address")];
+ let addr = rpc.call_method::<NewAddress>("getnewaddress", &addr_args).await.unwrap();
+ Address::from_str(addr.0.as_str()).unwrap()
+ }
+
+ pub async fn get_blockchain_info(&self) -> BlockchainInfo {
+ let mut rpc = self.bitcoind_rpc_client.lock().await;
+ rpc.call_method::<BlockchainInfo>("getblockchaininfo", &vec![]).await.unwrap()
+ }