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Remove last_block_connected from Channel

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Tracking the last block was only used to de-duplicate block_connected
calls, but this is no longer required as of the previous commit.
Further, the ChannelManager can pass the latest block hash when needing
to create a ChannelMonitor rather than have each Channel maintain an
up-to-date copy. This is implemented in the next commit.
This commit is contained in:
Jeffrey Czyz 2021-03-04 17:39:21 -08:00
parent ff4b4c4d36
commit caabc4ef39
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GPG key ID: 3A4E08275D5E96D2
2 changed files with 2 additions and 18 deletions
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16
lightning/src/ln/channel.rs
View file

@ -39,7 +39,6 @@ use util::errors::APIError;
use util::config::{UserConfig,ChannelConfig};
use std;
use std::default::Default;
use std::{cmp,mem,fmt};
use std::ops::Deref;
#[cfg(any(test, feature = "fuzztarget"))]
@ -368,8 +367,6 @@ pub(super) struct Channel<Signer: Sign> {
/// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback.
funding_tx_confirmed_in: Option<BlockHash>,
short_channel_id: Option<u64>,
/// Used to verify consistency during ChannelManager deserialization (hence pub(super)).
pub(super) last_block_connected: BlockHash,
funding_tx_confirmations: u64,
counterparty_dust_limit_satoshis: u64,
@ -568,7 +565,6 @@ impl<Signer: Sign> Channel<Signer> {
funding_tx_confirmed_in: None,
short_channel_id: None,
last_block_connected: Default::default(),
funding_tx_confirmations: 0,
feerate_per_kw: feerate,
@ -804,7 +800,6 @@ impl<Signer: Sign> Channel<Signer> {
funding_tx_confirmed_in: None,
short_channel_id: None,
last_block_connected: Default::default(),
funding_tx_confirmations: 0,
feerate_per_kw: msg.feerate_per_kw,
@ -3568,7 +3563,6 @@ impl<Signer: Sign> Channel<Signer> {
}
}
self.last_block_connected = header.block_hash();
self.update_time_counter = cmp::max(self.update_time_counter, header.time);
if self.funding_tx_confirmations > 0 {
if self.funding_tx_confirmations == self.minimum_depth as u64 {
@ -3590,7 +3584,7 @@ impl<Signer: Sign> Channel<Signer> {
// funding_tx_confirmed_in and return.
false
};
self.funding_tx_confirmed_in = Some(self.last_block_connected);
self.funding_tx_confirmed_in = Some(header.block_hash());
//TODO: Note that this must be a duplicate of the previous commitment point they sent us,
//as otherwise we will have a commitment transaction that they can't revoke (well, kinda,
@ -3623,8 +3617,7 @@ impl<Signer: Sign> Channel<Signer> {
return true;
}
}
self.last_block_connected = header.block_hash();
if Some(self.last_block_connected) == self.funding_tx_confirmed_in {
if Some(header.block_hash()) == self.funding_tx_confirmed_in {
self.funding_tx_confirmations = self.minimum_depth as u64 - 1;
}
false
@ -4433,8 +4426,6 @@ impl<Signer: Sign> Writeable for Channel<Signer> {
self.funding_tx_confirmed_in.write(writer)?;
self.short_channel_id.write(writer)?;
self.last_block_connected.write(writer)?;
self.funding_tx_confirmations.write(writer)?;
self.counterparty_dust_limit_satoshis.write(writer)?;
@ -4595,8 +4586,6 @@ impl<'a, Signer: Sign, K: Deref> ReadableArgs<&'a K> for Channel<Signer>
let funding_tx_confirmed_in = Readable::read(reader)?;
let short_channel_id = Readable::read(reader)?;
let last_block_connected = Readable::read(reader)?;
let funding_tx_confirmations = Readable::read(reader)?;
let counterparty_dust_limit_satoshis = Readable::read(reader)?;
@ -4667,7 +4656,6 @@ impl<'a, Signer: Sign, K: Deref> ReadableArgs<&'a K> for Channel<Signer>
funding_tx_confirmed_in,
short_channel_id,
last_block_connected,
funding_tx_confirmations,
counterparty_dust_limit_satoshis,

4
lightning/src/ln/channelmanager.rs
View file

@ -4153,10 +4153,6 @@ impl<'a, Signer: Sign, M: Deref, T: Deref, K: Deref, F: Deref, L: Deref>
let mut short_to_id = HashMap::with_capacity(cmp::min(channel_count as usize, 128));
for _ in 0..channel_count {
let mut channel: Channel<Signer> = Channel::read(reader, &args.keys_manager)?;
if channel.last_block_connected != Default::default() && channel.last_block_connected != last_block_hash {
return Err(DecodeError::InvalidValue);
}
let funding_txo = channel.get_funding_txo().ok_or(DecodeError::InvalidValue)?;
funding_txo_set.insert(funding_txo.clone());
if let Some(ref mut monitor) = args.channel_monitors.get_mut(&funding_txo) {