Make ChannelMonitor clonable again

In general, we'd been moving away from ChannelMonitor being clonable,
   XXXXXXXXXXXXXXXXXXXx

diff --git a/lightning/src/chain/channelmonitor.rs b/lightning/src/chain/channelmonitor.rs
index 7a99fb0099e989e35f83f57b487f546d16205e5b..ec6de88e98cfadf134380ec37c0e13173412cea1 100644 (file)
--- a/lightning/src/chain/channelmonitor.rs
+++ b/lightning/src/chain/channelmonitor.rs
@@ -282,7 +282,7 @@ impl HolderSignedTx {
 
 /// We use this to track static counterparty commitment transaction data and to generate any
 /// justice or 2nd-stage preimage/timeout transactions.
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 struct CounterpartyCommitmentParameters {
        counterparty_delayed_payment_base_key: PublicKey,
        counterparty_htlc_base_key: PublicKey,
@@ -336,7 +336,7 @@ impl Readable for CounterpartyCommitmentParameters {
 /// observed, as well as the transaction causing it.
 ///
 /// Used to determine when the on-chain event can be considered safe from a chain reorganization.
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 struct OnchainEventEntry {
        txid: Txid,
        height: u32,
@@ -379,7 +379,7 @@ type CommitmentTxCounterpartyOutputInfo = Option<(u32, u64)>;
 
 /// Upon discovering of some classes of onchain tx by ChannelMonitor, we may have to take actions on it
 /// once they mature to enough confirmations (ANTI_REORG_DELAY)
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 enum OnchainEvent {
        /// An outbound HTLC failing after a transaction is confirmed. Used
        ///  * when an outbound HTLC output is spent by us after the HTLC timed out
@@ -640,7 +640,7 @@ pub enum Balance {
 }
 
 /// An HTLC which has been irrevocably resolved on-chain, and has reached ANTI_REORG_DELAY.
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 struct IrrevocablyResolvedHTLC {
        commitment_tx_output_idx: Option<u32>,
        /// The txid of the transaction which resolved the HTLC, this may be a commitment (if the HTLC
@@ -713,6 +713,13 @@ pub struct ChannelMonitor<Signer: Sign> {
        inner: Mutex<ChannelMonitorImpl<Signer>>,
 }
 
+impl<Signer: Sign> Clone for ChannelMonitor<Signer> {
+       fn clone(&self) -> Self {
+               Self { inner: Mutex::new(self.inner.lock().unwrap().clone()) }
+       }
+}
+
+#[derive(Clone)]
 pub(crate) struct ChannelMonitorImpl<Signer: Sign> {
        latest_update_id: u64,
        commitment_transaction_number_obscure_factor: u64,

diff --git a/lightning/src/chain/keysinterface.rs b/lightning/src/chain/keysinterface.rs
index d260d029493760057558f55b32353a1d9fbbb32c..8d612b27466958f2466951c4459123062c36e57e 100644 (file)
--- a/lightning/src/chain/keysinterface.rs
+++ b/lightning/src/chain/keysinterface.rs
@@ -410,7 +410,7 @@ pub trait BaseSign {
 ///
 /// [`ChannelManager`]: crate::ln::channelmanager::ChannelManager
 /// [`ChannelMonitor`]: crate::chain::channelmonitor::ChannelMonitor
-pub trait Sign: BaseSign + Writeable {}
+pub trait Sign: BaseSign + Writeable + Clone {}
 
 /// Specifies the recipient of an invoice.
 ///

diff --git a/lightning/src/chain/onchaintx.rs b/lightning/src/chain/onchaintx.rs
index 9bfe6fa9af21b1547e5aa8bf2183062cde66f4cd..3dacdc631d17689bbed5b842e8a6737ed8383e79 100644 (file)
--- a/lightning/src/chain/onchaintx.rs
+++ b/lightning/src/chain/onchaintx.rs
@@ -54,7 +54,7 @@ const MAX_ALLOC_SIZE: usize = 64*1024;
 /// transaction causing it.
 ///
 /// Used to determine when the on-chain event can be considered safe from a chain reorganization.
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 struct OnchainEventEntry {
        txid: Txid,
        height: u32,
@@ -74,7 +74,7 @@ impl OnchainEventEntry {
 
 /// Upon discovering of some classes of onchain tx by ChannelMonitor, we may have to take actions on it
 /// once they mature to enough confirmations (ANTI_REORG_DELAY)
-#[derive(PartialEq, Eq)]
+#[derive(Clone, PartialEq, Eq)]
 enum OnchainEvent {
        /// Outpoint under claim process by our own tx, once this one get enough confirmations, we remove it from
        /// bump-txn candidate buffer.
@@ -219,6 +219,7 @@ type PackageID = [u8; 32];
 
 /// OnchainTxHandler receives claiming requests, aggregates them if it's sound, broadcast and
 /// do RBF bumping if possible.
+#[derive(Clone)]
 pub struct OnchainTxHandler<ChannelSigner: Sign> {
        destination_script: Script,
        holder_commitment: HolderCommitmentTransaction,