Move onchain payments API to OnchainPaymentHandler

Author: tnull

README.md

@@ -31,7 +31,7 @@ fn main() {
 
 	node.start().unwrap();
 
-	let funding_address = node.new_onchain_address();
+	let funding_address = node.onchain_payment().new_address();
 
 	// .. fund address ..
 

bindings/kotlin/ldk-node-android/lib/src/androidTest/kotlin/org/lightningdevkit/ldknode/AndroidLibTest.kt

@@ -51,10 +51,10 @@ class AndroidLibTest {
         val nodeId2 = node2.nodeId()
         println("Node Id 2: $nodeId2")
 
-        val address1 = node1.newOnchainAddress()
+        val address1 = node1.onchain_payment().newOnchainAddress()
         println("Funding address 1: $address1")
 
-        val address2 = node2.newOnchainAddress()
+        val address2 = node2.onchain_payment().newOnchainAddress()
         println("Funding address 2: $address2")
 
         node1.stop()

bindings/kotlin/ldk-node-jvm/lib/src/test/kotlin/org/lightningdevkit/ldknode/LibraryTest.kt

@@ -146,10 +146,10 @@ class LibraryTest {
         val nodeId2 = node2.nodeId()
         println("Node Id 2: $nodeId2")
 
-        val address1 = node1.newOnchainAddress()
+        val address1 = node1.onchainPayment().newAddress()
         println("Funding address 1: $address1")
 
-        val address2 = node2.newOnchainAddress()
+        val address2 = node2.onchainPayment().newAddress()
         println("Funding address 2: $address2")
 
         val txid1 = sendToAddress(address1, 100000u)

bindings/ldk_node.udl

@@ -55,12 +55,7 @@ interface Node {
 	sequence<SocketAddress>? listening_addresses();
 	Bolt11Payment bolt11_payment();
 	SpontaneousPayment spontaneous_payment();
-	[Throws=NodeError]
-	Address new_onchain_address();
-	[Throws=NodeError]
-	Txid send_to_onchain_address([ByRef]Address address, u64 amount_msat);
-	[Throws=NodeError]
-	Txid send_all_to_onchain_address([ByRef]Address address);
+	OnchainPayment onchain_payment();
 	[Throws=NodeError]
 	void connect(PublicKey node_id, SocketAddress address, boolean persist);
 	[Throws=NodeError]
@@ -111,6 +106,15 @@ interface SpontaneousPayment {
 	void send_probes(u64 amount_msat, PublicKey node_id);
 };
 
+interface OnchainPayment {
+	[Throws=NodeError]
+	Address new_address();
+	[Throws=NodeError]
+	Txid send_to_address([ByRef]Address address, u64 amount_msat);
+	[Throws=NodeError]
+	Txid send_all_to_address([ByRef]Address address);
+};
+
 [Error]
 enum NodeError {
 	"AlreadyRunning",

bindings/python/src/ldk_node/test_ldk_node.py

@@ -125,9 +125,9 @@ def test_channel_full_cycle(self):
         node_id_2 = node_2.node_id()
         print("Node ID 2:", node_id_2)
 
-        address_1 = node_1.new_onchain_address()
+        address_1 = node_1.onchain_payment().new_address()
         txid_1 = send_to_address(address_1, 100000)
-        address_2 = node_2.new_onchain_address()
+        address_2 = node_2.onchain_payment().new_address()
         txid_2 = send_to_address(address_2, 100000)
 
         wait_for_tx(esplora_endpoint, txid_1)

src/lib.rs

@@ -43,7 +43,7 @@
 //!
 //! 	node.start().unwrap();
 //!
-//! 	let funding_address = node.new_onchain_address();
+//! 	let funding_address = node.onchain_payment().new_address();
 //!
 //! 	// .. fund address ..
 //!
@@ -130,7 +130,7 @@ use connection::ConnectionManager;
 use event::{EventHandler, EventQueue};
 use gossip::GossipSource;
 use liquidity::LiquiditySource;
-use payment::{Bolt11Payment, SpontaneousPayment};
+use payment::{Bolt11Payment, OnchainPayment, SpontaneousPayment};
 use payment_store::PaymentStore;
 pub use payment_store::{LSPFeeLimits, PaymentDetails, PaymentDirection, PaymentStatus};
 use peer_store::{PeerInfo, PeerStore};
@@ -154,7 +154,6 @@ use lightning_background_processor::process_events_async;
 use lightning_transaction_sync::EsploraSyncClient;
 
 use bitcoin::secp256k1::PublicKey;
-use bitcoin::{Address, Txid};
 
 use rand::Rng;
 
@@ -874,38 +873,24 @@ impl Node {
 		))
 	}
 
-	/// Retrieve a new on-chain/funding address.
-	pub fn new_onchain_address(&self) -> Result<Address, Error> {
-		let funding_address = self.wallet.get_new_address()?;
-		log_info!(self.logger, "Generated new funding address: {}", funding_address);
-		Ok(funding_address)
-	}
-
-	/// Send an on-chain payment to the given address.
-	pub fn send_to_onchain_address(
-		&self, address: &bitcoin::Address, amount_sats: u64,
-	) -> Result<Txid, Error> {
-		let rt_lock = self.runtime.read().unwrap();
-		if rt_lock.is_none() {
-			return Err(Error::NotRunning);
-		}
-
-		let cur_balance = self.wallet.get_balance()?;
-		if cur_balance.get_spendable() < amount_sats {
-			log_error!(self.logger, "Unable to send payment due to insufficient funds.");
-			return Err(Error::InsufficientFunds);
-		}
-		self.wallet.send_to_address(address, Some(amount_sats))
+	/// Returns a payment handler allowing to send and receive on-chain payments.
+	#[cfg(not(feature = "uniffi"))]
+	pub fn onchain_payment(&self) -> OnchainPayment {
+		OnchainPayment::new(
+			Arc::clone(&self.runtime),
+			Arc::clone(&self.wallet),
+			Arc::clone(&self.logger),
+		)
 	}
 
-	/// Send an on-chain payment to the given address, draining all the available funds.
-	pub fn send_all_to_onchain_address(&self, address: &bitcoin::Address) -> Result<Txid, Error> {
-		let rt_lock = self.runtime.read().unwrap();
-		if rt_lock.is_none() {
-			return Err(Error::NotRunning);
-		}
-
-		self.wallet.send_to_address(address, None)
+	/// Returns a payment handler allowing to send and receive on-chain payments.
+	#[cfg(feature = "uniffi")]
+	pub fn onchain_payment(&self) -> Arc<OnchainPayment> {
+		Arc::new(OnchainPayment::new(
+			Arc::clone(&self.runtime),
+			Arc::clone(&self.wallet),
+			Arc::clone(&self.logger),
+		))
 	}
 
 	/// Retrieve a list of known channels.

src/payment/mod.rs

@@ -1,7 +1,9 @@
 //! Handlers for different types of payments.
 
 mod bolt11;
+mod onchain;
 mod spontaneous;
 
 pub use bolt11::Bolt11Payment;
+pub use onchain::OnchainPayment;
 pub use spontaneous::SpontaneousPayment;

src/payment/onchain.rs

@@ -0,0 +1,63 @@
+//! Holds a payment handler allowing to send and receive on-chain payments.
+
+use crate::error::Error;
+use crate::logger::{log_error, log_info, FilesystemLogger, Logger};
+use crate::types::Wallet;
+
+use bitcoin::{Address, Txid};
+
+use std::sync::{Arc, RwLock};
+
+/// A payment handler allowing to send and receive on-chain payments.
+///
+/// Should be retrieved by calling [`Node::onchain_payment`].
+///
+/// [`Node::onchain_payment`]: crate::Node::onchain_payment
+pub struct OnchainPayment {
+	runtime: Arc<RwLock<Option<tokio::runtime::Runtime>>>,
+	wallet: Arc<Wallet>,
+	logger: Arc<FilesystemLogger>,
+}
+
+impl OnchainPayment {
+	pub(crate) fn new(
+		runtime: Arc<RwLock<Option<tokio::runtime::Runtime>>>, wallet: Arc<Wallet>,
+		logger: Arc<FilesystemLogger>,
+	) -> Self {
+		Self { runtime, wallet, logger }
+	}
+
+	/// Retrieve a new on-chain/funding address.
+	pub fn new_address(&self) -> Result<Address, Error> {
+		let funding_address = self.wallet.get_new_address()?;
+		log_info!(self.logger, "Generated new funding address: {}", funding_address);
+		Ok(funding_address)
+	}
+
+	/// Send an on-chain payment to the given address.
+	pub fn send_to_address(
+		&self, address: &bitcoin::Address, amount_sats: u64,
+	) -> Result<Txid, Error> {
+		let rt_lock = self.runtime.read().unwrap();
+		if rt_lock.is_none() {
+			return Err(Error::NotRunning);
+		}
+
+		let cur_balance = self.wallet.get_balance()?;
+		if cur_balance.get_spendable() < amount_sats {
+			log_error!(self.logger, "Unable to send payment due to insufficient funds.");
+			return Err(Error::InsufficientFunds);
+		}
+		self.wallet.send_to_address(address, Some(amount_sats))
+	}
+
+	/// Send an on-chain payment to the given address, draining all the available funds.
+	pub fn send_all_to_address(&self, address: &bitcoin::Address) -> Result<Txid, Error> {
+		let rt_lock = self.runtime.read().unwrap();
+		if rt_lock.is_none() {
+			return Err(Error::NotRunning);
+		}
+
+		self.wallet.send_to_address(address, None)
+	}
+}

src/uniffi_types.rs

@@ -4,7 +4,7 @@ pub use lightning::util::string::UntrustedString;
 
 pub use lightning_invoice::Bolt11Invoice;
 
-pub use bitcoin::{BlockHash, Network, OutPoint};
+pub use bitcoin::{Address, BlockHash, Network, OutPoint, Txid};
 
 pub use bip39::Mnemonic;
 
@@ -17,7 +17,6 @@ use crate::{SocketAddress, UserChannelId};
 use bitcoin::hashes::sha256::Hash as Sha256;
 use bitcoin::hashes::Hash;
 use bitcoin::secp256k1::PublicKey;
-use bitcoin::{Address, Txid};
 use lightning_invoice::SignedRawBolt11Invoice;
 
 use std::convert::TryInto;

tests/common/mod.rs

@@ -355,8 +355,8 @@ pub fn open_channel(
 pub(crate) fn do_channel_full_cycle<E: ElectrumApi>(
 	node_a: TestNode, node_b: TestNode, bitcoind: &BitcoindClient, electrsd: &E, allow_0conf: bool,
 ) {
-	let addr_a = node_a.new_onchain_address().unwrap();
-	let addr_b = node_b.new_onchain_address().unwrap();
+	let addr_a = node_a.onchain_payment().new_address().unwrap();
+	let addr_b = node_b.onchain_payment().new_address().unwrap();
 
 	let premine_amount_sat = 100_000;