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Use non-funder's funding block wait instead of max with ours

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This is both required by the protocol and also makes sense - if
we're the funder we don't mind accepting payment on the channel
after one confirmation because we assume we won't double-spend
ourselves.
This commit is contained in:
Matt Corallo 2018-10-31 14:38:07 -04:00
parent 4d964d4d98
commit 55a74b5dab
1 changed files with 10 additions and 11 deletions
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21
src/ln/channel.rs
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@ -326,6 +326,7 @@ pub(super) struct Channel {
//implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16,
their_max_accepted_htlcs: u16,
//implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16,
minimum_depth: u32,
their_funding_pubkey: Option<PublicKey>,
their_revocation_basepoint: Option<PublicKey>,
@ -413,11 +414,6 @@ impl Channel {
CONF_TARGET
}
fn derive_maximum_minimum_depth(_channel_value_satoshis_msat: u64, _value_to_self_msat: u64) -> u32 {
const CONF_TARGET: u32 = 12; //TODO: Should be much higher
CONF_TARGET * 2
}
// Constructors:
pub fn new_outbound(fee_estimator: &FeeEstimator, keys_provider: &Arc<KeysInterface>, their_node_id: PublicKey, channel_value_satoshis: u64, push_msat: u64, announce_publicly: bool, user_id: u64, logger: Arc<Logger>) -> Result<Channel, APIError> {
let chan_keys = keys_provider.get_channel_keys(false);
@ -498,6 +494,7 @@ impl Channel {
our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate),
their_to_self_delay: 0,
their_max_accepted_htlcs: 0,
minimum_depth: 0, // Filled in in accept_channel
their_funding_pubkey: None,
their_revocation_basepoint: None,
@ -662,6 +659,7 @@ impl Channel {
our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(msg.feerate_per_kw as u64),
their_to_self_delay: msg.to_self_delay,
their_max_accepted_htlcs: msg.max_accepted_htlcs,
minimum_depth: Channel::derive_minimum_depth(msg.funding_satoshis*1000, msg.push_msat),
their_funding_pubkey: Some(msg.funding_pubkey),
their_revocation_basepoint: Some(msg.revocation_basepoint),
@ -1290,9 +1288,6 @@ impl Channel {
if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 {
return Err(ChannelError::Close("Minimum htlc value is full channel value"));
}
if msg.minimum_depth > Channel::derive_maximum_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) {
return Err(ChannelError::Close("minimum_depth too large"));
}
if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT {
return Err(ChannelError::Close("They wanted our payments to be delayed by a needlessly long period"));
}
@ -1320,6 +1315,7 @@ impl Channel {
self.their_htlc_minimum_msat = msg.htlc_minimum_msat;
self.their_to_self_delay = msg.to_self_delay;
self.their_max_accepted_htlcs = msg.max_accepted_htlcs;
self.minimum_depth = msg.minimum_depth;
self.their_funding_pubkey = Some(msg.funding_pubkey);
self.their_revocation_basepoint = Some(msg.revocation_basepoint);
self.their_payment_basepoint = Some(msg.payment_basepoint);
@ -2708,7 +2704,7 @@ impl Channel {
self.channel_monitor.last_block_hash = self.last_block_connected;
if self.funding_tx_confirmations > 0 {
self.funding_tx_confirmations += 1;
if self.funding_tx_confirmations == Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 {
if self.funding_tx_confirmations == self.minimum_depth as u64 {
let need_commitment_update = if non_shutdown_state == ChannelState::FundingSent as u32 {
self.channel_state |= ChannelState::OurFundingLocked as u32;
true
@ -2785,7 +2781,7 @@ impl Channel {
}
}
if Some(header.bitcoin_hash()) == self.funding_tx_confirmed_in {
self.funding_tx_confirmations = Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat) as u64 - 1;
self.funding_tx_confirmations = self.minimum_depth as u64 - 1;
}
self.last_block_connected = header.bitcoin_hash();
self.channel_monitor.last_block_hash = self.last_block_connected;
@ -2851,7 +2847,7 @@ impl Channel {
max_htlc_value_in_flight_msat: Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis),
channel_reserve_satoshis: Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis),
htlc_minimum_msat: self.our_htlc_minimum_msat,
minimum_depth: Channel::derive_minimum_depth(self.channel_value_satoshis*1000, self.value_to_self_msat),
minimum_depth: self.minimum_depth,
to_self_delay: BREAKDOWN_TIMEOUT,
max_accepted_htlcs: OUR_MAX_HTLCS,
funding_pubkey: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key),
@ -3482,6 +3478,7 @@ impl Writeable for Channel {
self.our_htlc_minimum_msat.write(writer)?;
self.their_to_self_delay.write(writer)?;
self.their_max_accepted_htlcs.write(writer)?;
self.minimum_depth.write(writer)?;
write_option!(self.their_funding_pubkey);
write_option!(self.their_revocation_basepoint);
@ -3655,6 +3652,7 @@ impl<R : ::std::io::Read> ReadableArgs<R, Arc<Logger>> for Channel {
let our_htlc_minimum_msat = Readable::read(reader)?;
let their_to_self_delay = Readable::read(reader)?;
let their_max_accepted_htlcs = Readable::read(reader)?;
let minimum_depth = Readable::read(reader)?;
let their_funding_pubkey = read_option!();
let their_revocation_basepoint = read_option!();
@ -3731,6 +3729,7 @@ impl<R : ::std::io::Read> ReadableArgs<R, Arc<Logger>> for Channel {
our_htlc_minimum_msat,
their_to_self_delay,
their_max_accepted_htlcs,
minimum_depth,
their_funding_pubkey,
their_revocation_basepoint,