// 030012 - inbound read from peer id 0 of len 18
// 0141 03000000000000000000000000000000 - message header indicating message length 321
// 0300fe - inbound read from peer id 0 of len 254
- // 0020 7500000000000000000000000000000000000000000000000000000000000000 ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679 000000000000c350 0000000000000000 000000000000014a ffffffffffffffff 0000000000000222 0000000000000000 000000fd 0006 01e3 030000000000000000000000000000000000000000000000000000000000000001 030000000000000000000000000000000000000000000000000000000000000002 030000000000000000000000000000000000000000000000000000000000000003 030000000000000000000000000000000000000000000000000000000000000004 - beginning of open_channel message
+ // 0020 7500000000000000000000000000000000000000000000000000000000000000 ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679 000000000000c350 0000000000000000 0000000000000162 ffffffffffffffff 0000000000000222 0000000000000000 000000fd 0006 01e3 030000000000000000000000000000000000000000000000000000000000000001 030000000000000000000000000000000000000000000000000000000000000002 030000000000000000000000000000000000000000000000000000000000000003 030000000000000000000000000000000000000000000000000000000000000004 - beginning of open_channel message
// 030053 - inbound read from peer id 0 of len 83
// 030000000000000000000000000000000000000000000000000000000000000005 020900000000000000000000000000000000000000000000000000000000000000 01 03000000000000000000000000000000 - rest of open_channel and mac
//
// 030112 - inbound read from peer id 1 of len 18
// 0110 01000000000000000000000000000000 - message header indicating message length 272
// 0301ff - inbound read from peer id 1 of len 255
- // 0021 0000000000000000000000000000000000000000000000000000000000000e05 000000000000014a 00000000004c4b40 00000000000003e8 00000000000003e8 00000002 03f0 0005 030000000000000000000000000000000000000000000000000000000000000100 030000000000000000000000000000000000000000000000000000000000000200 030000000000000000000000000000000000000000000000000000000000000300 030000000000000000000000000000000000000000000000000000000000000400 030000000000000000000000000000000000000000000000000000000000000500 02660000000000000000000000000000 - beginning of accept_channel
+ // 0021 0000000000000000000000000000000000000000000000000000000000000e05 0000000000000162 00000000004c4b40 00000000000003e8 00000000000003e8 00000002 03f0 0005 030000000000000000000000000000000000000000000000000000000000000100 030000000000000000000000000000000000000000000000000000000000000200 030000000000000000000000000000000000000000000000000000000000000300 030000000000000000000000000000000000000000000000000000000000000400 030000000000000000000000000000000000000000000000000000000000000500 02660000000000000000000000000000 - beginning of accept_channel
// 030121 - inbound read from peer id 1 of len 33
// 0000000000000000000000000000000000 01000000000000000000000000000000 - rest of accept_channel and mac
//
// - client now fails the HTLC backwards as it was unable to extract the payment preimage (CHECK 9 duplicate and CHECK 10)
let logger = Arc::new(TrackingLogger { lines: Mutex::new(HashMap::new()) });
- super::do_test(&::hex::decode("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&(Arc::clone(&logger) as Arc<dyn Logger>));
+ super::do_test(&::hex::decode("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&(Arc::clone(&logger) as Arc<dyn Logger>));
let log_entries = logger.lines.lock().unwrap();
assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendAcceptChannel event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000002 for channel ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679".to_string())), Some(&1)); // 1
use ln::features::{ChannelFeatures, InitFeatures};
use ln::msgs;
use ln::msgs::{DecodeError, OptionalField, DataLossProtect};
-use ln::script::ShutdownScript;
+use ln::script::{self, ShutdownScript};
use ln::channelmanager::{CounterpartyForwardingInfo, PendingHTLCStatus, HTLCSource, HTLCFailReason, HTLCFailureMsg, PendingHTLCInfo, RAACommitmentOrder, BREAKDOWN_TIMEOUT, MIN_CLTV_EXPIRY_DELTA, MAX_LOCAL_BREAKDOWN_TIMEOUT};
use ln::chan_utils::{CounterpartyCommitmentSecrets, TxCreationKeys, HTLCOutputInCommitment, HTLC_SUCCESS_TX_WEIGHT, HTLC_TIMEOUT_TX_WEIGHT, make_funding_redeemscript, ChannelPublicKeys, CommitmentTransaction, HolderCommitmentTransaction, ChannelTransactionParameters, CounterpartyChannelTransactionParameters, MAX_HTLCS, get_commitment_transaction_number_obscure_factor, ClosingTransaction};
use ln::chan_utils;
use io;
use prelude::*;
use core::{cmp,mem,fmt};
-use core::convert::TryFrom;
use core::ops::Deref;
#[cfg(any(test, feature = "fuzztarget", debug_assertions))]
use sync::Mutex;
/// it's 2^24.
pub const MAX_FUNDING_SATOSHIS: u64 = 1 << 24;
-/// Maximum counterparty `dust_limit_satoshis` allowed. 2 * standard dust threshold on p2wsh output
-/// Scales up on Bitcoin Core's proceeding policy with dust outputs. A typical p2wsh output is 43
-/// bytes to which Core's `GetDustThreshold()` sums up a minimal spend of 67 bytes (even if
-/// a p2wsh witnessScript might be *effectively* smaller), `dustRelayFee` is set to 3000sat/kb, thus
-/// 110 * 3000 / 1000 = 330. Per-protocol rules, all time-sensitive outputs are p2wsh, a value of
-/// 330 sats is the lower bound desired to ensure good propagation of transactions. We give a bit
-/// of margin to our counterparty and pick up 660 satoshis as an accepted `dust_limit_satoshis`
-/// upper bound to avoid negotiation conflicts with other implementations.
-pub const MAX_DUST_LIMIT_SATOSHIS: u64 = 2 * 330;
-
-/// A typical p2wsh output is 43 bytes to which Core's `GetDustThreshold()` sums up a minimal
-/// spend of 67 bytes (even if a p2wsh witnessScript might be *effectively* smaller), `dustRelayFee`
-/// is set to 3000sat/kb, thus 110 * 3000 / 1000 = 330. Per-protocol rules, all time-sensitive outputs
-/// are p2wsh, a value of 330 sats is the lower bound desired to ensure good propagation of transactions.
-pub const MIN_DUST_LIMIT_SATOSHIS: u64 = 330;
+/// The maximum network dust limit for standard script formats. This currently represents the
+/// minimum output value for a P2SH output before Bitcoin Core 22 considers the entire
+/// transaction non-standard and thus refuses to relay it.
+/// We also use this as the maximum counterparty `dust_limit_satoshis` allowed, given many
+/// implementations use this value for their dust limit today.
+pub const MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS: u64 = 546;
+
+/// The maximum channel dust limit we will accept from our counterparty.
+pub const MAX_CHAN_DUST_LIMIT_SATOSHIS: u64 = MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS;
+
+/// The dust limit is used for both the commitment transaction outputs as well as the closing
+/// transactions. For cooperative closing transactions, we require segwit outputs, though accept
+/// *any* segwit scripts, which are allowed to be up to 42 bytes in length.
+/// In order to avoid having to concern ourselves with standardness during the closing process, we
+/// simply require our counterparty to use a dust limit which will leave any segwit output
+/// standard.
+/// See https://github.com/lightningnetwork/lightning-rfc/issues/905 for more details.
+pub const MIN_CHAN_DUST_LIMIT_SATOSHIS: u64 = 354;
/// Used to return a simple Error back to ChannelManager. Will get converted to a
/// msgs::ErrorAction::SendErrorMessage or msgs::ErrorAction::IgnoreError as appropriate with our
return Err(APIError::APIMisuseError {err: format!("Configured with an unreasonable our_to_self_delay ({}) putting user funds at risks", holder_selected_contest_delay)});
}
let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(channel_value_satoshis);
- if holder_selected_channel_reserve_satoshis < MIN_DUST_LIMIT_SATOSHIS {
+ if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
return Err(APIError::APIMisuseError { err: format!("Holder selected channel reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
}
feerate_per_kw: feerate,
counterparty_dust_limit_satoshis: 0,
- holder_dust_limit_satoshis: MIN_DUST_LIMIT_SATOSHIS,
+ holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
counterparty_max_htlc_value_in_flight_msat: 0,
counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel
counterparty_htlc_minimum_msat: 0,
if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
}
- if msg.dust_limit_satoshis < MIN_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_DUST_LIMIT_SATOSHIS)));
+ if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
}
- if msg.dust_limit_satoshis > MAX_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_DUST_LIMIT_SATOSHIS)));
+ if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
}
// Convert things into internal flags and prep our state:
let background_feerate = fee_estimator.get_est_sat_per_1000_weight(ConfirmationTarget::Background);
let holder_selected_channel_reserve_satoshis = Channel::<Signer>::get_holder_selected_channel_reserve_satoshis(msg.funding_satoshis);
- if holder_selected_channel_reserve_satoshis < MIN_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). dust_limit_satoshis is ({}).", holder_selected_channel_reserve_satoshis, MIN_DUST_LIMIT_SATOSHIS)));
+ if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("Suitable channel reserve not found. remote_channel_reserve was ({}). dust_limit_satoshis is ({}).", holder_selected_channel_reserve_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
}
- if msg.channel_reserve_satoshis < MIN_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is smaller than our dust limit ({})", msg.channel_reserve_satoshis, MIN_DUST_LIMIT_SATOSHIS)));
+ if msg.channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("channel_reserve_satoshis ({}) is smaller than our dust limit ({})", msg.channel_reserve_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
}
if holder_selected_channel_reserve_satoshis < msg.dust_limit_satoshis {
return Err(ChannelError::Close(format!("Dust limit ({}) too high for the channel reserve we require the remote to keep ({})", msg.dust_limit_satoshis, holder_selected_channel_reserve_satoshis)));
if script.len() == 0 {
None
} else {
- match ShutdownScript::try_from((script.clone(), their_features)) {
- Ok(shutdown_script) => Some(shutdown_script.into_inner()),
- Err(_) => return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script))),
+ if !script::is_bolt2_compliant(&script, their_features) {
+ return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)))
}
+ Some(script.clone())
}
},
// Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
feerate_per_kw: msg.feerate_per_kw,
channel_value_satoshis: msg.funding_satoshis,
counterparty_dust_limit_satoshis: msg.dust_limit_satoshis,
- holder_dust_limit_satoshis: MIN_DUST_LIMIT_SATOSHIS,
+ holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
counterparty_max_htlc_value_in_flight_msat: cmp::min(msg.max_htlc_value_in_flight_msat, msg.funding_satoshis * 1000),
counterparty_selected_channel_reserve_satoshis: Some(msg.channel_reserve_satoshis),
counterparty_htlc_minimum_msat: msg.htlc_minimum_msat,
if msg.max_accepted_htlcs < config.peer_channel_config_limits.min_max_accepted_htlcs {
return Err(ChannelError::Close(format!("max_accepted_htlcs ({}) is less than the user specified limit ({})", msg.max_accepted_htlcs, config.peer_channel_config_limits.min_max_accepted_htlcs)));
}
- if msg.dust_limit_satoshis < MIN_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_DUST_LIMIT_SATOSHIS)));
+ if msg.dust_limit_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is less than the implementation limit ({})", msg.dust_limit_satoshis, MIN_CHAN_DUST_LIMIT_SATOSHIS)));
}
- if msg.dust_limit_satoshis > MAX_DUST_LIMIT_SATOSHIS {
- return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_DUST_LIMIT_SATOSHIS)));
+ if msg.dust_limit_satoshis > MAX_CHAN_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close(format!("dust_limit_satoshis ({}) is greater than the implementation limit ({})", msg.dust_limit_satoshis, MAX_CHAN_DUST_LIMIT_SATOSHIS)));
}
if msg.minimum_depth > config.peer_channel_config_limits.max_minimum_depth {
return Err(ChannelError::Close(format!("We consider the minimum depth to be unreasonably large. Expected minimum: ({}). Actual: ({})", config.peer_channel_config_limits.max_minimum_depth, msg.minimum_depth)));
if script.len() == 0 {
None
} else {
- match ShutdownScript::try_from((script.clone(), their_features)) {
- Ok(shutdown_script) => Some(shutdown_script.into_inner()),
- Err(_) => return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script))),
+ if !script::is_bolt2_compliant(&script, their_features) {
+ return Err(ChannelError::Close(format!("Peer is signaling upfront_shutdown but has provided an unacceptable scriptpubkey format: {}", script)));
}
+ Some(script.clone())
}
},
// Peer is signaling upfront shutdown but don't opt-out with correct mechanism (a.k.a 0-length script). Peer looks buggy, we fail the channel
}
assert_eq!(self.channel_state & ChannelState::ShutdownComplete as u32, 0);
- let shutdown_scriptpubkey = match ShutdownScript::try_from((msg.scriptpubkey.clone(), their_features)) {
- Ok(script) => script.into_inner(),
- Err(_) => return Err(ChannelError::Close(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex()))),
- };
+ if !script::is_bolt2_compliant(&msg.scriptpubkey, their_features) {
+ return Err(ChannelError::Close(format!("Got a nonstandard scriptpubkey ({}) from remote peer", msg.scriptpubkey.to_bytes().to_hex())));
+ }
if self.counterparty_shutdown_scriptpubkey.is_some() {
- if Some(&shutdown_scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
- return Err(ChannelError::Close(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", shutdown_scriptpubkey.to_bytes().to_hex())));
+ if Some(&msg.scriptpubkey) != self.counterparty_shutdown_scriptpubkey.as_ref() {
+ return Err(ChannelError::Close(format!("Got shutdown request with a scriptpubkey ({}) which did not match their previous scriptpubkey.", msg.scriptpubkey.to_bytes().to_hex())));
}
} else {
- self.counterparty_shutdown_scriptpubkey = Some(shutdown_scriptpubkey);
+ self.counterparty_shutdown_scriptpubkey = Some(msg.scriptpubkey.clone());
}
// If we have any LocalAnnounced updates we'll probably just get back an update_fail_htlc
},
};
+ for outp in closing_tx.trust().built_transaction().output.iter() {
+ if !outp.script_pubkey.is_witness_program() && outp.value < MAX_STD_OUTPUT_DUST_LIMIT_SATOSHIS {
+ return Err(ChannelError::Close("Remote sent us a closing_signed with a dust output. Always use segwit closing scripts!".to_owned()));
+ }
+ }
+
assert!(self.shutdown_scriptpubkey.is_some());
if let Some((last_fee, sig)) = self.last_sent_closing_fee {
if last_fee == msg.fee_satoshis {
push_amt -= Channel::<EnforcingSigner>::get_holder_selected_channel_reserve_satoshis(100_000) * 1000;
create_announced_chan_between_nodes_with_value(&nodes, 0, 1, 100000, push_amt, InitFeatures::known(), InitFeatures::known());
- let dust_amt = crate::ln::channel::MIN_DUST_LIMIT_SATOSHIS * 1000
+ let dust_amt = crate::ln::channel::MIN_CHAN_DUST_LIMIT_SATOSHIS * 1000
+ feerate_per_kw as u64 * HTLC_SUCCESS_TX_WEIGHT / 1000 * 1000 - 1;
// In the previous code, routing this dust payment would cause nodes[0] to perceive a channel
// reserve violation even though it's a dust HTLC and therefore shouldn't count towards the
let push_msat=10001;
nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), channel_value_satoshis, push_msat, 42, None).unwrap();
let mut node0_to_1_send_open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
- node0_to_1_send_open_channel.dust_limit_satoshis = 661;
+ node0_to_1_send_open_channel.dust_limit_satoshis = 547;
node0_to_1_send_open_channel.channel_reserve_satoshis = 100001;
nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &node0_to_1_send_open_channel);
},
_ => panic!("Unexpected event"),
};
- assert_eq!(err_msg.data, "dust_limit_satoshis (661) is greater than the implementation limit (660)");
+ assert_eq!(err_msg.data, "dust_limit_satoshis (547) is greater than the implementation limit (546)");
}
// Test that if we fail to send an HTLC that is being freed from the holding cell, and the HTLC
pass_along_path(&nodes[0], &path, 10000, payment_hash, None, event, true, Some(test_preimage));
claim_payment(&nodes[0], &path, test_preimage);
}
-
-fn do_test_max_dust_htlc_exposure(dust_outbound_balance: bool, at_forward: bool, on_holder_tx: bool) {
- // Test that we properly reject dust HTLC violating our `max_dust_htlc_exposure_msat` policy.
- //
- // At HTLC forward (`send_payment()`), if the sum of the trimmed-to-dust HTLC inbound and
- // trimmed-to-dust HTLC outbound balance and this new payment as included on next counterparty
- // commitment are above our `max_dust_htlc_exposure_msat`, we'll reject the update.
- // At HTLC reception (`update_add_htlc()`), if the sum of the trimmed-to-dust HTLC inbound
- // and trimmed-to-dust HTLC outbound balance and this new received HTLC as included on next
- // counterparty commitment are above our `max_dust_htlc_exposure_msat`, we'll fail the update.
- // Note, we return a `temporary_channel_failure` (0x1000 | 7), as the channel might be
- // available again for HTLC processing once the dust bandwidth has cleared up.
-
- let chanmon_cfgs = create_chanmon_cfgs(2);
- let mut config = test_default_channel_config();
- config.channel_options.max_dust_htlc_exposure_msat = 5_000_000; // default setting value
- let node_cfgs = create_node_cfgs(2, &chanmon_cfgs);
- let node_chanmgrs = create_node_chanmgrs(2, &node_cfgs, &[None, Some(config)]);
- let mut nodes = create_network(2, &node_cfgs, &node_chanmgrs);
-
- nodes[0].node.create_channel(nodes[1].node.get_our_node_id(), 1_000_000, 500_000_000, 42, None).unwrap();
- let mut open_channel = get_event_msg!(nodes[0], MessageSendEvent::SendOpenChannel, nodes[1].node.get_our_node_id());
- open_channel.max_htlc_value_in_flight_msat = 50_000_000;
- open_channel.max_accepted_htlcs = 60;
- nodes[1].node.handle_open_channel(&nodes[0].node.get_our_node_id(), InitFeatures::known(), &open_channel);
- let mut accept_channel = get_event_msg!(nodes[1], MessageSendEvent::SendAcceptChannel, nodes[0].node.get_our_node_id());
- if on_holder_tx {
- accept_channel.dust_limit_satoshis = 660;
- }
- nodes[0].node.handle_accept_channel(&nodes[1].node.get_our_node_id(), InitFeatures::known(), &accept_channel);
-
- let (temporary_channel_id, tx, _) = create_funding_transaction(&nodes[0], 1_000_000, 42);
-
- if on_holder_tx {
- if let Some(mut chan) = nodes[1].node.channel_state.lock().unwrap().by_id.get_mut(&temporary_channel_id) {
- chan.holder_dust_limit_satoshis = 660;
- }
- }
-
- nodes[0].node.funding_transaction_generated(&temporary_channel_id, tx.clone()).unwrap();
- nodes[1].node.handle_funding_created(&nodes[0].node.get_our_node_id(), &get_event_msg!(nodes[0], MessageSendEvent::SendFundingCreated, nodes[1].node.get_our_node_id()));
- check_added_monitors!(nodes[1], 1);
-
- nodes[0].node.handle_funding_signed(&nodes[1].node.get_our_node_id(), &get_event_msg!(nodes[1], MessageSendEvent::SendFundingSigned, nodes[0].node.get_our_node_id()));
- check_added_monitors!(nodes[0], 1);
-
- let (funding_locked, _) = create_chan_between_nodes_with_value_confirm(&nodes[0], &nodes[1], &tx);
- let (announcement, as_update, bs_update) = create_chan_between_nodes_with_value_b(&nodes[0], &nodes[1], &funding_locked);
- update_nodes_with_chan_announce(&nodes, 0, 1, &announcement, &as_update, &bs_update);
-
- if on_holder_tx {
- if dust_outbound_balance {
- for i in 0..2 {
- let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], 2_300_000);
- if let Err(_) = nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)) { panic!("Unexpected event at dust HTLC {}", i); }
- }
- } else {
- for _ in 0..2 {
- route_payment(&nodes[0], &[&nodes[1]], 2_300_000);
- }
- }
- } else {
- if dust_outbound_balance {
- for i in 0..25 {
- let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], 200_000); // + 177_000 msat of HTLC-success tx at 253 sats/kWU
- if let Err(_) = nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)) { panic!("Unexpected event at dust HTLC {}", i); }
- }
- } else {
- for _ in 0..25 {
- route_payment(&nodes[0], &[&nodes[1]], 200_000); // + 167_000 msat of HTLC-timeout tx at 253 sats/kWU
- }
- }
- }
-
- if at_forward {
- let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[1], nodes[0], if on_holder_tx { 2_300_000 } else { 200_000 });
- let mut config = UserConfig::default();
- if on_holder_tx {
- unwrap_send_err!(nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable { ref err }, assert_eq!(err, &format!("Cannot send value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx", 6_900_000, config.channel_options.max_dust_htlc_exposure_msat)));
- } else {
- unwrap_send_err!(nodes[1].node.send_payment(&route, payment_hash, &Some(payment_secret)), true, APIError::ChannelUnavailable { ref err }, assert_eq!(err, &format!("Cannot send value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx", 5_200_000, config.channel_options.max_dust_htlc_exposure_msat)));
- }
- } else {
- let (route, payment_hash, _, payment_secret) = get_route_and_payment_hash!(nodes[0], nodes[1 ], if on_holder_tx { 2_300_000 } else { 200_000 });
- nodes[0].node.send_payment(&route, payment_hash, &Some(payment_secret)).unwrap();
- check_added_monitors!(nodes[0], 1);
- let mut events = nodes[0].node.get_and_clear_pending_msg_events();
- assert_eq!(events.len(), 1);
- let payment_event = SendEvent::from_event(events.remove(0));
- nodes[1].node.handle_update_add_htlc(&nodes[0].node.get_our_node_id(), &payment_event.msgs[0]);
- if on_holder_tx {
- nodes[1].logger.assert_log("lightning::ln::channel".to_string(), format!("Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on holder commitment tx", 6_900_000, config.channel_options.max_dust_htlc_exposure_msat), 1);
- } else {
- nodes[1].logger.assert_log("lightning::ln::channel".to_string(), format!("Cannot accept value that would put our exposure to dust HTLCs at {} over the limit {} on counterparty commitment tx", 5_200_000, config.channel_options.max_dust_htlc_exposure_msat), 1);
- }
- }
-
- let _ = nodes[1].node.get_and_clear_pending_msg_events();
- let mut added_monitors = nodes[1].chain_monitor.added_monitors.lock().unwrap();
- added_monitors.clear();
-}
-
-#[test]
-fn test_max_dust_htlc_exposure() {
- do_test_max_dust_htlc_exposure(true, true, true);
- do_test_max_dust_htlc_exposure(false, true, true);
- do_test_max_dust_htlc_exposure(false, false, true);
- do_test_max_dust_htlc_exposure(false, false, false);
- do_test_max_dust_htlc_exposure(true, true, false);
- do_test_max_dust_htlc_exposure(true, false, false);
- do_test_max_dust_htlc_exposure(true, false, true);
- do_test_max_dust_htlc_exposure(false, true, false);
-}
use bitcoin::blockdata::opcodes::all::OP_PUSHBYTES_0 as SEGWIT_V0;
use bitcoin::blockdata::script::{Builder, Script};
use bitcoin::hashes::Hash;
-use bitcoin::hash_types::{PubkeyHash, ScriptHash, WPubkeyHash, WScriptHash};
+use bitcoin::hash_types::{WPubkeyHash, WScriptHash};
use bitcoin::secp256k1::key::PublicKey;
use ln::features::InitFeatures;
Self(ShutdownScriptImpl::Legacy(pubkey))
}
- /// Generates a P2PKH script pubkey from the given [`PubkeyHash`].
- pub fn new_p2pkh(pubkey_hash: &PubkeyHash) -> Self {
- Self(ShutdownScriptImpl::Bolt2(Script::new_p2pkh(pubkey_hash)))
- }
-
- /// Generates a P2SH script pubkey from the given [`ScriptHash`].
- pub fn new_p2sh(script_hash: &ScriptHash) -> Self {
- Self(ShutdownScriptImpl::Bolt2(Script::new_p2sh(script_hash)))
- }
-
/// Generates a P2WPKH script pubkey from the given [`WPubkeyHash`].
pub fn new_p2wpkh(pubkey_hash: &WPubkeyHash) -> Self {
Self(ShutdownScriptImpl::Bolt2(Script::new_v0_wpkh(pubkey_hash)))
}
}
-fn is_bolt2_compliant(script: &Script, features: &InitFeatures) -> bool {
+/// Check if a given script is compliant with BOLT 2's shutdown script requirements for the given
+/// counterparty features.
+pub(crate) fn is_bolt2_compliant(script: &Script, features: &InitFeatures) -> bool {
if script.is_p2pkh() || script.is_p2sh() || script.is_v0_p2wpkh() || script.is_v0_p2wsh() {
true
} else if features.supports_shutdown_anysegwit() {
}
}
+// Note that this is only for our own shutdown scripts. Counterparties are still allowed to send us
+// non-witness shutdown scripts which this rejects.
impl TryFrom<Script> for ShutdownScript {
type Error = InvalidShutdownScript;
}
}
+// Note that this is only for our own shutdown scripts. Counterparties are still allowed to send us
+// non-witness shutdown scripts which this rejects.
impl TryFrom<(Script, &InitFeatures)> for ShutdownScript {
type Error = InvalidShutdownScript;
fn try_from((script, features): (Script, &InitFeatures)) -> Result<Self, Self::Error> {
- if is_bolt2_compliant(&script, features) {
+ if is_bolt2_compliant(&script, features) && script.is_witness_program() {
Ok(Self(ShutdownScriptImpl::Bolt2(script)))
} else {
Err(InvalidShutdownScript { script })
assert_eq!(shutdown_script.into_inner(), p2wpkh_script);
}
- #[test]
- fn generates_p2pkh_from_pubkey_hash() {
- let pubkey_hash = pubkey().pubkey_hash();
- let p2pkh_script = Script::new_p2pkh(&pubkey_hash);
-
- let shutdown_script = ShutdownScript::new_p2pkh(&pubkey_hash);
- assert!(shutdown_script.is_compatible(&InitFeatures::known()));
- assert!(shutdown_script.is_compatible(&InitFeatures::known().clear_shutdown_anysegwit()));
- assert_eq!(shutdown_script.into_inner(), p2pkh_script);
- assert!(ShutdownScript::try_from(p2pkh_script).is_ok());
- }
-
- #[test]
- fn generates_p2sh_from_script_hash() {
- let script_hash = redeem_script().script_hash();
- let p2sh_script = Script::new_p2sh(&script_hash);
-
- let shutdown_script = ShutdownScript::new_p2sh(&script_hash);
- assert!(shutdown_script.is_compatible(&InitFeatures::known()));
- assert!(shutdown_script.is_compatible(&InitFeatures::known().clear_shutdown_anysegwit()));
- assert_eq!(shutdown_script.into_inner(), p2sh_script);
- assert!(ShutdownScript::try_from(p2sh_script).is_ok());
- }
-
#[test]
fn generates_p2wpkh_from_pubkey_hash() {
let pubkey_hash = pubkey().wpubkey_hash().unwrap();
projects / rust-lightning / commitdiff