mirror of
https://github.com/lightningdevkit/rust-lightning.git
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Handle incoming shutdown messages
This commit is contained in:
Matt Corallo
parent
890e3cb165
commit
c528ff3650
7 changed files with 410 additions and 40 deletions
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@ -248,6 +248,14 @@ pub fn do_test(data: &[u8]) {
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let update_fee = decode_msg!(msgs::UpdateFee, 32+4);
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return_err!(channel.update_fee(&fee_est, &update_fee));
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},
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9 => {
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let shutdown = decode_msg_with_len16!(msgs::Shutdown, 32, 1);
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return_err!(channel.shutdown(&fee_est, &shutdown));
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},
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10 => {
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let closing_signed = decode_msg!(msgs::ClosingSigned, 32+8+64);
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return_err!(channel.closing_signed(&fee_est, &closing_signed));
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},
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_ => return,
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}
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}
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@ -2,10 +2,11 @@ extern crate bitcoin;
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extern crate lightning;
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extern crate secp256k1;
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use bitcoin::blockdata::transaction::Transaction;
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use bitcoin::network::constants::Network;
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use bitcoin::util::hash::Sha256dHash;
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use lightning::chain::chaininterface::{ConfirmationTarget,FeeEstimator,ChainWatchInterfaceUtil};
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use lightning::chain::chaininterface::{BroadcasterInterface,ConfirmationTarget,FeeEstimator,ChainWatchInterfaceUtil};
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use lightning::ln::{channelmonitor,msgs};
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use lightning::ln::channelmanager::ChannelManager;
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use lightning::ln::peer_handler::{MessageHandler,PeerManager,SocketDescriptor};
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@ -73,6 +74,11 @@ impl channelmonitor::ManyChannelMonitor for TestChannelMonitor {
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}
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}
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struct TestBroadcaster {}
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impl BroadcasterInterface for TestBroadcaster {
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fn broadcast_transaction(&self, _tx: &Transaction) {}
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}
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#[derive(Clone, PartialEq, Eq, Hash)]
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struct Peer {
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id: u8,
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@ -120,8 +126,9 @@ pub fn do_test(data: &[u8]) {
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let monitor = Arc::new(TestChannelMonitor{});
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let watch = Arc::new(ChainWatchInterfaceUtil::new());
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let broadcast = Arc::new(TestBroadcaster{});
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let channelmanager = ChannelManager::new(our_network_key, slice_to_be32(get_slice!(4)), get_slice!(1)[0] != 0, Network::Bitcoin, fee_est.clone(), monitor.clone(), watch.clone()).unwrap();
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let channelmanager = ChannelManager::new(our_network_key, slice_to_be32(get_slice!(4)), get_slice!(1)[0] != 0, Network::Bitcoin, fee_est.clone(), monitor.clone(), watch.clone(), broadcast.clone()).unwrap();
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let router = Arc::new(Router::new(PublicKey::from_secret_key(&secp_ctx, &our_network_key).unwrap()));
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let handler = PeerManager::new(MessageHandler {
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@ -149,7 +149,20 @@ enum ChannelState {
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/// later.
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/// Flag is set on ChannelFunded.
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AwaitingRemoteRevoke = (1 << 7),
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/// Flag which is set on ChannelFunded or FundingSent after receiving a shutdown message from
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/// the remote end. If set, they may not add any new HTLCs to the channel, and we are expected
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/// to respond with our own shutdown message when possible.
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RemoteShutdownSent = (1 << 8),
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/// Flag which is set on ChannelFunded or FundingSent after sending a shutdown message. At this
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/// point, we may not add any new HTLCs to the channel.
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/// TODO: Investigate some kind of timeout mechanism by which point the remote end must provide
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/// us their shutdown.
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LocalShutdownSent = (1 << 9),
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/// We've successfully negotiated a closing_signed dance. At this point ChannelManager is about
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/// to drop us, but we store this anyway.
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ShutdownComplete = (1 << 10),
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}
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const BOTH_SIDES_SHUTDOWN_MASK: u32 = (ChannelState::LocalShutdownSent as u32 | ChannelState::RemoteShutdownSent as u32);
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// TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking
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// has been completed, and then turn into a Channel to get compiler-time enforcement of things like
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@ -177,6 +190,8 @@ pub struct Channel {
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channel_update_count: u32,
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feerate_per_kw: u64,
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last_sent_closing_fee: Option<(u64, u64)>, // (feerate, fee)
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/// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this
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/// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full
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/// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we
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@ -208,6 +223,8 @@ pub struct Channel {
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their_cur_commitment_point: PublicKey,
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their_node_id: PublicKey,
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their_shutdown_scriptpubkey: Option<Script>,
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channel_monitor: ChannelMonitor,
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}
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@ -310,6 +327,8 @@ impl Channel {
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next_remote_htlc_id: 0,
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channel_update_count: 0,
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last_sent_closing_fee: None,
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funding_tx_confirmed_in: Default::default(),
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short_channel_id: None,
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last_block_connected: Default::default(),
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@ -333,6 +352,8 @@ impl Channel {
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their_cur_commitment_point: PublicKey::new(),
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their_node_id: their_node_id,
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their_shutdown_scriptpubkey: None,
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channel_monitor: channel_monitor,
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}
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}
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@ -424,6 +445,8 @@ impl Channel {
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next_remote_htlc_id: 0,
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channel_update_count: 0,
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last_sent_closing_fee: None,
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funding_tx_confirmed_in: Default::default(),
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short_channel_id: None,
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last_block_connected: Default::default(),
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@ -448,6 +471,8 @@ impl Channel {
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their_cur_commitment_point: msg.first_per_commitment_point,
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their_node_id: their_node_id,
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their_shutdown_scriptpubkey: None,
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channel_monitor: channel_monitor,
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};
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@ -598,6 +623,75 @@ impl Channel {
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}, htlcs_used))
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}
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#[inline]
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fn get_closing_scriptpubkey(&self) -> Script {
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let our_channel_close_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.channel_close_key).unwrap().serialize());
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Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_close_key_hash[..]).into_script()
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}
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#[inline]
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fn get_closing_transaction_weight(a_scriptpubkey: &Script, b_scriptpubkey: &Script) -> u64 {
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(4 + 1 + 36 + 4 + 1 + 1 + 2*(8+1) + 4 + a_scriptpubkey.len() as u64 + b_scriptpubkey.len() as u64)*4 + 2 + 1 + 1 + 2*(1 + 72)
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}
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#[inline]
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fn build_closing_transaction(&self, proposed_total_fee_satoshis: u64, skip_remote_output: bool) -> (Transaction, u64) {
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let txins = {
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let mut ins: Vec<TxIn> = Vec::new();
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ins.push(TxIn {
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prev_hash: self.channel_monitor.get_funding_txo().unwrap().0,
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prev_index: self.channel_monitor.get_funding_txo().unwrap().1 as u32,
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script_sig: Script::new(),
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sequence: 0xffffffff,
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witness: Vec::new(),
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});
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ins
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};
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assert!(self.pending_htlcs.is_empty());
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let mut txouts: Vec<(TxOut, ())> = Vec::new();
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let mut total_fee_satoshis = proposed_total_fee_satoshis;
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let value_to_self: i64 = (self.value_to_self_msat as i64) / 1000 - if self.channel_outbound { total_fee_satoshis as i64 } else { 0 };
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let value_to_remote: i64 = ((self.channel_value_satoshis * 1000 - self.value_to_self_msat) as i64 / 1000) - if self.channel_outbound { 0 } else { total_fee_satoshis as i64 };
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if value_to_self < 0 {
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assert!(self.channel_outbound);
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total_fee_satoshis += (-value_to_self) as u64;
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} else if value_to_remote < 0 {
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assert!(!self.channel_outbound);
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total_fee_satoshis += (-value_to_remote) as u64;
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}
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if !skip_remote_output && value_to_remote as u64 > self.our_dust_limit_satoshis {
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txouts.push((TxOut {
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script_pubkey: self.their_shutdown_scriptpubkey.clone().unwrap(),
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value: value_to_remote as u64
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}, ()));
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}
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if value_to_self as u64 > self.our_dust_limit_satoshis {
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txouts.push((TxOut {
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script_pubkey: self.get_closing_scriptpubkey(),
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value: value_to_self as u64
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}, ()));
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}
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transaction_utils::sort_outputs(&mut txouts);
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let mut outputs: Vec<TxOut> = Vec::new();
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for out in txouts.drain(..) {
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outputs.push(out.0);
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}
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(Transaction {
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version: 2,
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lock_time: 0,
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input: txins,
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output: outputs,
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}, total_fee_satoshis)
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}
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#[inline]
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/// Creates a set of keys for build_commitment_transaction to generate a transaction which our
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/// counterparty will sign (ie DO NOT send signatures over a transaction created by this to
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@ -640,7 +734,7 @@ impl Channel {
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}.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script()
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}
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fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Result<(), HandleError> {
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fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Signature {
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if tx.input.len() != 1 {
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panic!("Tried to sign commitment transaction that had input count != 1!");
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}
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@ -650,8 +744,8 @@ impl Channel {
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let funding_redeemscript = self.get_funding_redeemscript();
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let sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]));
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let our_sig = secp_call!(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key));
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let sighash = Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]).unwrap();
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let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
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tx.input[0].witness.push(Vec::new()); // First is the multisig dummy
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@ -669,7 +763,7 @@ impl Channel {
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tx.input[0].witness.push(funding_redeemscript.into_vec());
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Ok(())
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our_sig
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}
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/// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output
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@ -752,6 +846,7 @@ impl Channel {
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if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
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return Err(HandleError{err: "Was asked to fulfill an HTLC when channel was not in an operational state", msg: None});
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}
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assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
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let mut sha = Sha256::new();
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sha.input(&payment_preimage);
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@ -789,6 +884,7 @@ impl Channel {
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if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
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return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", msg: None});
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}
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assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
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let mut htlc_id = 0;
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let mut htlc_amount_msat = 0;
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@ -952,12 +1048,13 @@ impl Channel {
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}
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pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> {
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if self.channel_state == ChannelState::FundingSent as u32 {
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let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
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if non_shutdown_state == ChannelState::FundingSent as u32 {
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self.channel_state |= ChannelState::TheirFundingLocked as u32;
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} else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
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self.channel_state = ChannelState::ChannelFunded as u32;
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} else if self.channel_state < ChannelState::FundingSent as u32 {
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return Err(HandleError{err: "Peer sent a funding_locked before we'd even been told the funding txid", msg: None});
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} else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) {
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self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
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} else {
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return Err(HandleError{err: "Peer sent a funding_locked at a strange time", msg: None});
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}
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//TODO: Note that this must be a duplicate of the previous commitment point they sent us,
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@ -990,7 +1087,7 @@ impl Channel {
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}
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pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> {
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if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
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if (self.channel_state & (ChannelState::ChannelFunded as u32 | ChannelState::RemoteShutdownSent as u32)) != (ChannelState::ChannelFunded as u32) {
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return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None});
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}
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if msg.amount_msat > self.channel_value_satoshis * 1000 {
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@ -1240,6 +1337,179 @@ impl Channel {
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Ok(())
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}
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pub fn shutdown(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>, Vec<[u8; 32]>), HandleError> {
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if self.channel_state < ChannelState::FundingSent as u32 {
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self.channel_state = ChannelState::ShutdownComplete as u32;
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return Ok((None, None, Vec::new()));
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}
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for htlc in self.pending_htlcs.iter() {
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if htlc.state == HTLCState::RemoteAnnounced {
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return Err(HandleError{err: "Got shutdown with remote pending HTLCs", msg: None});
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}
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}
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if (self.channel_state & ChannelState::RemoteShutdownSent as u32) == ChannelState::RemoteShutdownSent as u32 {
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return Err(HandleError{err: "Remote peer sent duplicate shutdown message", msg: None});
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}
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assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
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// BOLT 2 says we must only send a scriptpubkey of certain standard forms, which are up to
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// 34 bytes in length, so dont let the remote peer feed us some super fee-heavy script.
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if self.channel_outbound && msg.scriptpubkey.len() > 34 {
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return Err(HandleError{err: "Got shutdown_scriptpubkey of absurd length from remote peer", msg: None});
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}
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//TODO: Check shutdown_scriptpubkey form as BOLT says we must? WHYYY
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if self.their_shutdown_scriptpubkey.is_some() {
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if Some(&msg.scriptpubkey) != self.their_shutdown_scriptpubkey.as_ref() {
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return Err(HandleError{err: "Got shutdown request with a scriptpubkey which did not match their previous scriptpubkey", msg: None});
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}
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} else {
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self.their_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
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}
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let our_closing_script = self.get_closing_scriptpubkey();
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let (proposed_feerate, proposed_fee, our_sig) = if self.channel_outbound && self.pending_htlcs.is_empty() {
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let mut proposed_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
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if self.feerate_per_kw > proposed_feerate * 250 {
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proposed_feerate = self.feerate_per_kw / 250;
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}
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let tx_weight = Self::get_closing_transaction_weight(&our_closing_script, &msg.scriptpubkey);
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let proposed_total_fee_satoshis = proposed_feerate * tx_weight / 4;
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let (closing_tx, total_fee_satoshis) = self.build_closing_transaction(proposed_total_fee_satoshis, false);
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let funding_redeemscript = self.get_funding_redeemscript();
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let sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]));
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(Some(proposed_feerate), Some(total_fee_satoshis), Some(secp_call!(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key))))
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} else { (None, None, None) };
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// From here on out, we may not fail!
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self.channel_state |= ChannelState::RemoteShutdownSent as u32;
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// We can't send our shutdown until we've committed all of our pending HTLCs, but the
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// remote side is unlikely to accept any new HTLCs, so we go ahead and "free" any holding
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// cell HTLCs and return them to fail the payment.
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let mut dropped_outbound_htlcs = Vec::with_capacity(self.holding_cell_htlcs.len());
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for htlc in self.holding_cell_htlcs.drain(..) {
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dropped_outbound_htlcs.push(htlc.payment_hash);
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}
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for htlc in self.pending_htlcs.iter() {
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if htlc.state == HTLCState::LocalAnnounced {
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return Ok((None, None, dropped_outbound_htlcs));
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}
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}
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let our_shutdown = if (self.channel_state & ChannelState::LocalShutdownSent as u32) == ChannelState::LocalShutdownSent as u32 {
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None
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} else {
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Some(msgs::Shutdown {
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channel_id: self.channel_id,
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scriptpubkey: our_closing_script,
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})
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};
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self.channel_state |= ChannelState::LocalShutdownSent as u32;
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if self.pending_htlcs.is_empty() && self.channel_outbound {
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// There are no more HTLCs and we're the funder, this means we start the closing_signed
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// dance with an initial fee proposal!
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self.last_sent_closing_fee = Some((proposed_feerate.unwrap(), proposed_fee.unwrap()));
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Ok((our_shutdown, Some(msgs::ClosingSigned {
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channel_id: self.channel_id,
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fee_satoshis: proposed_fee.unwrap(),
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signature: our_sig.unwrap(),
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}), dropped_outbound_htlcs))
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} else {
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Ok((our_shutdown, None, dropped_outbound_htlcs))
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}
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}
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pub fn closing_signed(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::ClosingSigned) -> Result<(Option<msgs::ClosingSigned>, Option<Transaction>), HandleError> {
|
||||
if self.channel_state & BOTH_SIDES_SHUTDOWN_MASK != BOTH_SIDES_SHUTDOWN_MASK {
|
||||
return Err(HandleError{err: "Remote end sent us a closing_signed before both sides provided a shutdown", msg: None});
|
||||
}
|
||||
if !self.pending_htlcs.is_empty() {
|
||||
return Err(HandleError{err: "Remote end sent us a closing_signed while there were still pending HTLCs", msg: None});
|
||||
}
|
||||
if msg.fee_satoshis > 21000000 * 10000000 {
|
||||
return Err(HandleError{err: "Remote tried to send us a closing tx with > 21 million BTC fee", msg: None});
|
||||
}
|
||||
|
||||
let funding_redeemscript = self.get_funding_redeemscript();
|
||||
let (mut closing_tx, used_total_fee) = self.build_closing_transaction(msg.fee_satoshis, false);
|
||||
if used_total_fee != msg.fee_satoshis {
|
||||
return Err(HandleError{err: "Remote sent us a closing_signed with a fee greater than the value they can claim", msg: None});
|
||||
}
|
||||
let mut sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]));
|
||||
|
||||
match self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey) {
|
||||
Ok(_) => {},
|
||||
Err(_) => {
|
||||
// The remote end may have decided to revoke their output due to inconsistent dust
|
||||
// limits, so check for that case by re-checking the signature here.
|
||||
closing_tx = self.build_closing_transaction(msg.fee_satoshis, true).0;
|
||||
sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]));
|
||||
secp_call!(self.secp_ctx.verify(&sighash, &msg.signature, &self.their_funding_pubkey));
|
||||
},
|
||||
};
|
||||
|
||||
if let Some((_, last_fee)) = self.last_sent_closing_fee {
|
||||
if last_fee == msg.fee_satoshis {
|
||||
self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
|
||||
self.channel_state = ChannelState::ShutdownComplete as u32;
|
||||
return Ok((None, Some(closing_tx)));
|
||||
}
|
||||
}
|
||||
|
||||
macro_rules! propose_new_feerate {
|
||||
($new_feerate: expr) => {
|
||||
let closing_tx_max_weight = Self::get_closing_transaction_weight(&self.get_closing_scriptpubkey(), self.their_shutdown_scriptpubkey.as_ref().unwrap());
|
||||
let (closing_tx, used_total_fee) = self.build_closing_transaction($new_feerate * closing_tx_max_weight / 4, false);
|
||||
sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&closing_tx).sighash_all(&closing_tx.input[0], &funding_redeemscript, self.channel_value_satoshis)[..]));
|
||||
let our_sig = self.secp_ctx.sign(&sighash, &self.local_keys.funding_key).unwrap();
|
||||
self.last_sent_closing_fee = Some(($new_feerate, used_total_fee));
|
||||
return Ok((Some(msgs::ClosingSigned {
|
||||
channel_id: self.channel_id,
|
||||
fee_satoshis: used_total_fee,
|
||||
signature: our_sig,
|
||||
}), None))
|
||||
}
|
||||
}
|
||||
|
||||
let proposed_sat_per_vbyte = msg.fee_satoshis * 4 / closing_tx.get_weight();
|
||||
if self.channel_outbound {
|
||||
let our_max_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal);
|
||||
if proposed_sat_per_vbyte > our_max_feerate {
|
||||
if let Some((last_feerate, _)) = self.last_sent_closing_fee {
|
||||
if our_max_feerate <= last_feerate {
|
||||
return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something higher than our Normal feerate", msg: None});
|
||||
}
|
||||
}
|
||||
propose_new_feerate!(our_max_feerate);
|
||||
}
|
||||
} else {
|
||||
let our_min_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background);
|
||||
if proposed_sat_per_vbyte < our_min_feerate {
|
||||
if let Some((last_feerate, _)) = self.last_sent_closing_fee {
|
||||
if our_min_feerate >= last_feerate {
|
||||
return Err(HandleError{err: "Unable to come to consensus about closing feerate, remote wanted something lower than our Background feerate", msg: None});
|
||||
}
|
||||
}
|
||||
propose_new_feerate!(our_min_feerate);
|
||||
}
|
||||
}
|
||||
|
||||
let our_sig = self.sign_commitment_transaction(&mut closing_tx, &msg.signature);
|
||||
self.channel_state = ChannelState::ShutdownComplete as u32;
|
||||
|
||||
Ok((Some(msgs::ClosingSigned {
|
||||
channel_id: self.channel_id,
|
||||
fee_satoshis: msg.fee_satoshis,
|
||||
signature: our_sig,
|
||||
}), Some(closing_tx)))
|
||||
}
|
||||
|
||||
// Public utilities:
|
||||
|
||||
pub fn channel_id(&self) -> Uint256 {
|
||||
|
|
@ -1309,7 +1579,8 @@ impl Channel {
|
|||
|
||||
/// Returns true if this channel is fully established and not known to be closing.
|
||||
pub fn is_usable(&self) -> bool {
|
||||
(self.channel_state & (ChannelState::ChannelFunded as u32)) == (ChannelState::ChannelFunded as u32)
|
||||
let mask = ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK;
|
||||
(self.channel_state & mask) == (ChannelState::ChannelFunded as u32)
|
||||
}
|
||||
|
||||
/// Returns true if this channel is currently available for use. This is a superset of
|
||||
|
|
@ -1318,19 +1589,30 @@ impl Channel {
|
|||
self.is_usable()
|
||||
}
|
||||
|
||||
/// Returns true if this channel is fully shut down. True here implies that no further actions
|
||||
/// may/will be taken on this channel, and thus this object should be freed. Any future changes
|
||||
/// will be handled appropriately by the chain monitor.
|
||||
pub fn is_shutdown(&self) -> bool {
|
||||
if (self.channel_state & ChannelState::ShutdownComplete as u32) == ChannelState::ShutdownComplete as u32 {
|
||||
assert!(self.channel_state == ChannelState::ShutdownComplete as u32);
|
||||
true
|
||||
} else { false }
|
||||
}
|
||||
|
||||
/// Called by channelmanager based on chain blocks being connected.
|
||||
/// Note that we only need to use this to detect funding_signed, anything else is handled by
|
||||
/// the channel_monitor.
|
||||
pub fn block_connected(&mut self, header: &BlockHeader, height: u32, txn_matched: &[&Transaction], indexes_of_txn_matched: &[u32]) -> Option<msgs::FundingLocked> {
|
||||
let non_shutdown_state = self.channel_state & (!BOTH_SIDES_SHUTDOWN_MASK);
|
||||
if self.funding_tx_confirmations > 0 {
|
||||
if header.bitcoin_hash() != self.last_block_connected {
|
||||
self.last_block_connected = header.bitcoin_hash();
|
||||
self.funding_tx_confirmations += 1;
|
||||
if self.funding_tx_confirmations == CONF_TARGET as u64 {
|
||||
if self.channel_state == ChannelState::FundingSent as u32 {
|
||||
if non_shutdown_state == ChannelState::FundingSent as u32 {
|
||||
self.channel_state |= ChannelState::OurFundingLocked as u32;
|
||||
} else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
|
||||
self.channel_state = ChannelState::ChannelFunded as u32;
|
||||
} else if non_shutdown_state == (ChannelState::FundingSent as u32 | ChannelState::TheirFundingLocked as u32) {
|
||||
self.channel_state = ChannelState::ChannelFunded as u32 | (self.channel_state & BOTH_SIDES_SHUTDOWN_MASK);
|
||||
//TODO: Something about a state where we "lost confirmation"
|
||||
} else if self.channel_state < ChannelState::ChannelFunded as u32 {
|
||||
panic!("Started confirming a channel in a state pre-FundingSent?");
|
||||
|
|
@ -1354,7 +1636,7 @@ impl Channel {
|
|||
}
|
||||
}
|
||||
}
|
||||
if self.channel_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
|
||||
if non_shutdown_state & !(ChannelState::TheirFundingLocked as u32) == ChannelState::FundingSent as u32 {
|
||||
for (ref tx, index_in_block) in txn_matched.iter().zip(indexes_of_txn_matched) {
|
||||
if tx.txid() == self.channel_monitor.get_funding_txo().unwrap().0 {
|
||||
self.funding_tx_confirmations = 1;
|
||||
|
|
@ -1513,11 +1795,14 @@ impl Channel {
|
|||
/// bitcoin_key, if available, for this channel. The channel must be publicly announceable and
|
||||
/// available for use (have exchanged FundingLocked messages in both directions. Should be used
|
||||
/// for both loose and in response to an AnnouncementSignatures message from the remote peer.
|
||||
/// Note that you can get an announcement for a channel which is closing, though you should
|
||||
/// likely not announce such a thing. In case its already been announced, a channel_update
|
||||
/// message can mark the channel disabled.
|
||||
pub fn get_channel_announcement(&self, our_node_id: PublicKey, chain_hash: Sha256dHash) -> Result<(msgs::UnsignedChannelAnnouncement, Signature), HandleError> {
|
||||
if !self.announce_publicly {
|
||||
return Err(HandleError{err: "Channel is not available for public announcements", msg: None});
|
||||
}
|
||||
if self.channel_state < ChannelState::ChannelFunded as u32 {
|
||||
if self.channel_state & (ChannelState::ChannelFunded as u32) != (ChannelState::ChannelFunded as u32) {
|
||||
return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", msg: None});
|
||||
}
|
||||
|
||||
|
|
@ -1549,8 +1834,8 @@ impl Channel {
|
|||
/// waiting on the remote peer to send us a revoke_and_ack during which time we cannot add new
|
||||
/// HTLCs on the wire or we wouldn't be able to determine what they actually ACK'ed.
|
||||
pub fn send_htlc(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, onion_routing_packet: msgs::OnionPacket) -> Result<Option<msgs::UpdateAddHTLC>, HandleError> {
|
||||
if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) {
|
||||
return Err(HandleError{err: "Cannot send HTLC until channel is fully established", msg: None});
|
||||
if (self.channel_state & (ChannelState::ChannelFunded as u32 | BOTH_SIDES_SHUTDOWN_MASK)) != (ChannelState::ChannelFunded as u32) {
|
||||
return Err(HandleError{err: "Cannot send HTLC until channel is fully established and we haven't started shutting down", msg: None});
|
||||
}
|
||||
|
||||
if amount_msat > self.channel_value_satoshis * 1000 {
|
||||
|
|
@ -1749,7 +2034,7 @@ mod tests {
|
|||
let sighash = Message::from_slice(&bip143::SighashComponents::new(&unsigned_tx.0).sighash_all(&unsigned_tx.0.input[0], &chan.get_funding_redeemscript(), chan.channel_value_satoshis)[..]).unwrap();
|
||||
secp_ctx.verify(&sighash, &their_signature, &chan.their_funding_pubkey).unwrap();
|
||||
|
||||
chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature).unwrap();
|
||||
chan.sign_commitment_transaction(&mut unsigned_tx.0, &their_signature);
|
||||
|
||||
assert_eq!(serialize(&unsigned_tx.0).unwrap()[..],
|
||||
hex_bytes($tx_hex).unwrap()[..]);
|
||||
|
|
|
|||
|
|
@ -11,7 +11,7 @@ use secp256k1::{Secp256k1,Message};
|
|||
use secp256k1::ecdh::SharedSecret;
|
||||
use secp256k1;
|
||||
|
||||
use chain::chaininterface::{ChainListener,ChainWatchInterface,FeeEstimator};
|
||||
use chain::chaininterface::{BroadcasterInterface,ChainListener,ChainWatchInterface,FeeEstimator};
|
||||
use ln::channel::Channel;
|
||||
use ln::channelmonitor::ManyChannelMonitor;
|
||||
use ln::router::Route;
|
||||
|
|
@ -126,6 +126,7 @@ pub struct ChannelManager {
|
|||
fee_estimator: Arc<FeeEstimator>,
|
||||
monitor: Arc<ManyChannelMonitor>,
|
||||
chain_monitor: Arc<ChainWatchInterface>,
|
||||
tx_broadcaster: Arc<BroadcasterInterface>,
|
||||
|
||||
announce_channels_publicly: bool,
|
||||
fee_proportional_millionths: u32,
|
||||
|
|
@ -165,18 +166,19 @@ impl ChannelManager {
|
|||
/// fee_proportional_millionths is an optional fee to charge any payments routed through us.
|
||||
/// Non-proportional fees are fixed according to our risk using the provided fee estimator.
|
||||
/// panics if channel_value_satoshis is >= (1 << 24)!
|
||||
pub fn new(our_network_key: SecretKey, fee_proportional_millionths: u32, announce_channels_publicly: bool, network: Network, feeest: Arc<FeeEstimator>, monitor: Arc<ManyChannelMonitor>, chain_monitor: Arc<ChainWatchInterface>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
|
||||
pub fn new(our_network_key: SecretKey, fee_proportional_millionths: u32, announce_channels_publicly: bool, network: Network, feeest: Arc<FeeEstimator>, monitor: Arc<ManyChannelMonitor>, chain_monitor: Arc<ChainWatchInterface>, tx_broadcaster: Arc<BroadcasterInterface>) -> Result<Arc<ChannelManager>, secp256k1::Error> {
|
||||
let secp_ctx = Secp256k1::new();
|
||||
|
||||
let res = Arc::new(ChannelManager {
|
||||
genesis_hash: genesis_block(network).header.bitcoin_hash(),
|
||||
fee_estimator: feeest.clone(),
|
||||
monitor: monitor.clone(),
|
||||
chain_monitor: chain_monitor,
|
||||
chain_monitor,
|
||||
tx_broadcaster,
|
||||
|
||||
announce_channels_publicly: announce_channels_publicly,
|
||||
fee_proportional_millionths: fee_proportional_millionths,
|
||||
secp_ctx: secp_ctx,
|
||||
announce_channels_publicly,
|
||||
fee_proportional_millionths,
|
||||
secp_ctx,
|
||||
|
||||
channel_state: Mutex::new(ChannelHolder{
|
||||
by_id: HashMap::new(),
|
||||
|
|
@ -185,7 +187,7 @@ impl ChannelManager {
|
|||
forward_htlcs: HashMap::new(),
|
||||
claimable_htlcs: HashMap::new(),
|
||||
}),
|
||||
our_network_key: our_network_key,
|
||||
our_network_key,
|
||||
|
||||
pending_events: Mutex::new(Vec::new()),
|
||||
});
|
||||
|
|
@ -978,12 +980,57 @@ impl ChannelMessageHandler for ChannelManager {
|
|||
};
|
||||
}
|
||||
|
||||
fn handle_shutdown(&self, _their_node_id: &PublicKey, _msg: &msgs::Shutdown) -> Result<(), HandleError> {
|
||||
unimplemented!()
|
||||
fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &msgs::Shutdown) -> Result<(Option<msgs::Shutdown>, Option<msgs::ClosingSigned>), HandleError> {
|
||||
let res = {
|
||||
let mut channel_state = self.channel_state.lock().unwrap();
|
||||
|
||||
match channel_state.by_id.entry(msg.channel_id.clone()) {
|
||||
hash_map::Entry::Occupied(mut chan_entry) => {
|
||||
if chan_entry.get().get_their_node_id() != *their_node_id {
|
||||
return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
|
||||
}
|
||||
let res = chan_entry.get_mut().shutdown(&*self.fee_estimator, &msg)?;
|
||||
if chan_entry.get().is_shutdown() {
|
||||
chan_entry.remove_entry();
|
||||
}
|
||||
res
|
||||
},
|
||||
hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
|
||||
}
|
||||
};
|
||||
for payment_hash in res.2 {
|
||||
// unknown_next_peer...I dunno who that is anymore....
|
||||
self.fail_htlc_backwards_internal(self.channel_state.lock().unwrap(), &payment_hash, HTLCFailReason::Reason { failure_code: 0x4000 | 10, data: &[0; 0] });
|
||||
}
|
||||
Ok((res.0, res.1))
|
||||
}
|
||||
|
||||
fn handle_closing_signed(&self, _their_node_id: &PublicKey, _msg: &msgs::ClosingSigned) -> Result<(), HandleError> {
|
||||
unimplemented!()
|
||||
fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &msgs::ClosingSigned) -> Result<Option<msgs::ClosingSigned>, HandleError> {
|
||||
let res = {
|
||||
let mut channel_state = self.channel_state.lock().unwrap();
|
||||
match channel_state.by_id.entry(msg.channel_id.clone()) {
|
||||
hash_map::Entry::Occupied(mut chan_entry) => {
|
||||
if chan_entry.get().get_their_node_id() != *their_node_id {
|
||||
return Err(HandleError{err: "Got a message for a channel from the wrong node!", msg: None})
|
||||
}
|
||||
let res = chan_entry.get_mut().closing_signed(&*self.fee_estimator, &msg)?;
|
||||
if res.1.is_some() {
|
||||
// We're done with this channel, we've got a signed closing transaction and
|
||||
// will send the closing_signed back to the remote peer upon return. This
|
||||
// also implies there are no pending HTLCs left on the channel, so we can
|
||||
// fully delete it from tracking (the channel monitor is still around to
|
||||
// watch for old state broadcasts)!
|
||||
chan_entry.remove_entry();
|
||||
}
|
||||
res
|
||||
},
|
||||
hash_map::Entry::Vacant(_) => return Err(HandleError{err: "Failed to find corresponding channel", msg: None})
|
||||
}
|
||||
};
|
||||
if let Some(broadcast_tx) = res.1 {
|
||||
self.tx_broadcaster.broadcast_transaction(&broadcast_tx);
|
||||
}
|
||||
Ok(res.0)
|
||||
}
|
||||
|
||||
fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &msgs::UpdateAddHTLC) -> Result<(), msgs::HandleError> {
|
||||
|
|
@ -1878,45 +1925,49 @@ mod tests {
|
|||
let feeest_1 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
|
||||
let chain_monitor_1 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
|
||||
let chan_monitor_1 = Arc::new(test_utils::TestChannelMonitor{});
|
||||
let tx_broadcaster_1 = Arc::new(test_utils::TestBroadcaster{});
|
||||
let node_id_1 = {
|
||||
let mut key_slice = [0; 32];
|
||||
rng.fill_bytes(&mut key_slice);
|
||||
SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
|
||||
};
|
||||
let node_1 = ChannelManager::new(node_id_1.clone(), 0, true, Network::Testnet, feeest_1.clone(), chan_monitor_1.clone(), chain_monitor_1.clone()).unwrap();
|
||||
let node_1 = ChannelManager::new(node_id_1.clone(), 0, true, Network::Testnet, feeest_1.clone(), chan_monitor_1.clone(), chain_monitor_1.clone(), tx_broadcaster_1.clone()).unwrap();
|
||||
let router_1 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_1).unwrap());
|
||||
|
||||
let feeest_2 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
|
||||
let chain_monitor_2 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
|
||||
let chan_monitor_2 = Arc::new(test_utils::TestChannelMonitor{});
|
||||
let tx_broadcaster_2 = Arc::new(test_utils::TestBroadcaster{});
|
||||
let node_id_2 = {
|
||||
let mut key_slice = [0; 32];
|
||||
rng.fill_bytes(&mut key_slice);
|
||||
SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
|
||||
};
|
||||
let node_2 = ChannelManager::new(node_id_2.clone(), 0, true, Network::Testnet, feeest_2.clone(), chan_monitor_2.clone(), chain_monitor_2.clone()).unwrap();
|
||||
let node_2 = ChannelManager::new(node_id_2.clone(), 0, true, Network::Testnet, feeest_2.clone(), chan_monitor_2.clone(), chain_monitor_2.clone(), tx_broadcaster_2.clone()).unwrap();
|
||||
let router_2 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_2).unwrap());
|
||||
|
||||
let feeest_3 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
|
||||
let chain_monitor_3 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
|
||||
let chan_monitor_3 = Arc::new(test_utils::TestChannelMonitor{});
|
||||
let tx_broadcaster_3 = Arc::new(test_utils::TestBroadcaster{});
|
||||
let node_id_3 = {
|
||||
let mut key_slice = [0; 32];
|
||||
rng.fill_bytes(&mut key_slice);
|
||||
SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
|
||||
};
|
||||
let node_3 = ChannelManager::new(node_id_3.clone(), 0, true, Network::Testnet, feeest_3.clone(), chan_monitor_3.clone(), chain_monitor_3.clone()).unwrap();
|
||||
let node_3 = ChannelManager::new(node_id_3.clone(), 0, true, Network::Testnet, feeest_3.clone(), chan_monitor_3.clone(), chain_monitor_3.clone(), tx_broadcaster_3.clone()).unwrap();
|
||||
let router_3 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_3).unwrap());
|
||||
|
||||
let feeest_4 = Arc::new(test_utils::TestFeeEstimator { sat_per_vbyte: 1 });
|
||||
let chain_monitor_4 = Arc::new(chaininterface::ChainWatchInterfaceUtil::new());
|
||||
let chan_monitor_4 = Arc::new(test_utils::TestChannelMonitor{});
|
||||
let tx_broadcaster_4 = Arc::new(test_utils::TestBroadcaster{});
|
||||
let node_id_4 = {
|
||||
let mut key_slice = [0; 32];
|
||||
rng.fill_bytes(&mut key_slice);
|
||||
SecretKey::from_slice(&secp_ctx, &key_slice).unwrap()
|
||||
};
|
||||
let node_4 = ChannelManager::new(node_id_4.clone(), 0, true, Network::Testnet, feeest_4.clone(), chan_monitor_4.clone(), chain_monitor_4.clone()).unwrap();
|
||||
let node_4 = ChannelManager::new(node_id_4.clone(), 0, true, Network::Testnet, feeest_4.clone(), chan_monitor_4.clone(), chain_monitor_4.clone(), tx_broadcaster_4.clone()).unwrap();
|
||||
let router_4 = Router::new(PublicKey::from_secret_key(&secp_ctx, &node_id_4).unwrap());
|
||||
|
||||
// Create some initial channels
|
||||
|
|
|
|||
|
|
@ -366,8 +366,8 @@ pub trait ChannelMessageHandler : events::EventsProvider {
|
|||
fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &FundingLocked) -> Result<Option<AnnouncementSignatures>, HandleError>;
|
||||
|
||||
// Channl close:
|
||||
fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &Shutdown) -> Result<(), HandleError>;
|
||||
fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &ClosingSigned) -> Result<(), HandleError>;
|
||||
fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &Shutdown) -> Result<(Option<Shutdown>, Option<ClosingSigned>), HandleError>;
|
||||
fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &ClosingSigned) -> Result<Option<ClosingSigned>, HandleError>;
|
||||
|
||||
// HTLC handling:
|
||||
fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &UpdateAddHTLC) -> Result<(), HandleError>;
|
||||
|
|
|
|||
|
|
@ -357,11 +357,20 @@ impl<Descriptor: SocketDescriptor> PeerManager<Descriptor> {
|
|||
|
||||
38 => {
|
||||
let msg = try_potential_decodeerror!(msgs::Shutdown::decode(&msg_data[2..]));
|
||||
try_potential_handleerror!(self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg));
|
||||
let resp_options = try_potential_handleerror!(self.message_handler.chan_handler.handle_shutdown(&peer.their_node_id.unwrap(), &msg));
|
||||
if let Some(resp) = resp_options.0 {
|
||||
encode_and_send_msg!(resp, 38);
|
||||
}
|
||||
if let Some(resp) = resp_options.1 {
|
||||
encode_and_send_msg!(resp, 39);
|
||||
}
|
||||
},
|
||||
39 => {
|
||||
let msg = try_potential_decodeerror!(msgs::ClosingSigned::decode(&msg_data[2..]));
|
||||
try_potential_handleerror!(self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg));
|
||||
let resp_option = try_potential_handleerror!(self.message_handler.chan_handler.handle_closing_signed(&peer.their_node_id.unwrap(), &msg));
|
||||
if let Some(resp) = resp_option {
|
||||
encode_and_send_msg!(resp, 39);
|
||||
}
|
||||
},
|
||||
|
||||
128 => {
|
||||
|
|
|
|||
|
|
@ -3,6 +3,7 @@ use chain::chaininterface::ConfirmationTarget;
|
|||
use ln::channelmonitor;
|
||||
use ln::msgs::HandleError;
|
||||
|
||||
use bitcoin::blockdata::transaction::Transaction;
|
||||
use bitcoin::util::hash::Sha256dHash;
|
||||
|
||||
pub struct TestFeeEstimator {
|
||||
|
|
@ -23,3 +24,12 @@ impl channelmonitor::ManyChannelMonitor for TestChannelMonitor {
|
|||
Ok(())
|
||||
}
|
||||
}
|
||||
|
||||
pub struct TestBroadcaster {
|
||||
|
||||
}
|
||||
impl chaininterface::BroadcasterInterface for TestBroadcaster {
|
||||
fn broadcast_transaction(&self, _tx: &Transaction) {
|
||||
//TODO
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Reference in a new issue