Ok(channel_context)
}
+ fn new_for_outbound_channel<'a, ES: Deref, F: Deref>(
+ fee_estimator: &'a LowerBoundedFeeEstimator<F>,
+ entropy_source: &'a ES,
+ signer_provider: &'a SP,
+ counterparty_node_id: PublicKey,
+ their_features: &'a InitFeatures,
+ funding_satoshis: u64,
+ push_msat: u64,
+ user_id: u128,
+ config: &'a UserConfig,
+ current_chain_height: u32,
+ outbound_scid_alias: u64,
+ temporary_channel_id: Option<ChannelId>,
+ channel_type: ChannelTypeFeatures,
+ ) -> Result<ChannelContext<SP>, APIError>
+ where
+ ES::Target: EntropySource,
+ F::Target: FeeEstimator,
+ SP::Target: SignerProvider,
+ {
+ // This will be updated with the counterparty contribution if this is a dual-funded channel
+ let channel_value_satoshis = funding_satoshis;
+
+ let holder_selected_contest_delay = config.channel_handshake_config.our_to_self_delay;
+ let channel_keys_id = signer_provider.generate_channel_keys_id(false, channel_value_satoshis, user_id);
+ let holder_signer = signer_provider.derive_channel_signer(channel_value_satoshis, channel_keys_id);
+ let pubkeys = holder_signer.pubkeys().clone();
+
+ if !their_features.supports_wumbo() && channel_value_satoshis > MAX_FUNDING_SATOSHIS_NO_WUMBO {
+ return Err(APIError::APIMisuseError{err: format!("funding_value must not exceed {}, it was {}", MAX_FUNDING_SATOSHIS_NO_WUMBO, channel_value_satoshis)});
+ }
+ if channel_value_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
+ return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than the total bitcoin supply, it was {}", channel_value_satoshis)});
+ }
+ let channel_value_msat = channel_value_satoshis * 1000;
+ if push_msat > channel_value_msat {
+ return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
+ }
+ if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
+ 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 = get_holder_selected_channel_reserve_satoshis(channel_value_satoshis, config);
+ if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
+ // Protocol level safety check in place, although it should never happen because
+ // of `MIN_THEIR_CHAN_RESERVE_SATOSHIS`
+ return Err(APIError::APIMisuseError { err: format!("Holder selected channel reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
+ }
+
+ debug_assert!(channel_type.is_subset(&channelmanager::provided_channel_type_features(&config)));
+
+ let (commitment_conf_target, anchor_outputs_value_msat) = if channel_type.supports_anchors_zero_fee_htlc_tx() {
+ (ConfirmationTarget::AnchorChannelFee, ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000)
+ } else {
+ (ConfirmationTarget::NonAnchorChannelFee, 0)
+ };
+ let commitment_feerate = fee_estimator.bounded_sat_per_1000_weight(commitment_conf_target);
+
+ let value_to_self_msat = channel_value_satoshis * 1000 - push_msat;
+ let commitment_tx_fee = commit_tx_fee_msat(commitment_feerate, MIN_AFFORDABLE_HTLC_COUNT, &channel_type);
+ if value_to_self_msat.saturating_sub(anchor_outputs_value_msat) < commitment_tx_fee {
+ return Err(APIError::APIMisuseError{ err: format!("Funding amount ({}) can't even pay fee for initial commitment transaction fee of {}.", value_to_self_msat / 1000, commitment_tx_fee / 1000) });
+ }
+
+ let mut secp_ctx = Secp256k1::new();
+ secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
+
+ let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
+ match signer_provider.get_shutdown_scriptpubkey() {
+ Ok(scriptpubkey) => Some(scriptpubkey),
+ Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get shutdown scriptpubkey".to_owned()}),
+ }
+ } else { None };
+
+ if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
+ if !shutdown_scriptpubkey.is_compatible(&their_features) {
+ return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
+ }
+ }
+
+ let destination_script = match signer_provider.get_destination_script(channel_keys_id) {
+ Ok(script) => script,
+ Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get destination script".to_owned()}),
+ };
+
+ let temporary_channel_id = temporary_channel_id.unwrap_or_else(|| ChannelId::temporary_from_entropy_source(entropy_source));
+
+ Ok(Self {
+ user_id,
+
+ config: LegacyChannelConfig {
+ options: config.channel_config.clone(),
+ announced_channel: config.channel_handshake_config.announced_channel,
+ commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
+ },
+
+ prev_config: None,
+
+ inbound_handshake_limits_override: Some(config.channel_handshake_limits.clone()),
+
+ channel_id: temporary_channel_id,
+ temporary_channel_id: Some(temporary_channel_id),
+ channel_state: ChannelState::NegotiatingFunding(NegotiatingFundingFlags::OUR_INIT_SENT),
+ announcement_sigs_state: AnnouncementSigsState::NotSent,
+ secp_ctx,
+ channel_value_satoshis,
+
+ latest_monitor_update_id: 0,
+
+ holder_signer: ChannelSignerType::Ecdsa(holder_signer),
+ shutdown_scriptpubkey,
+ destination_script,
+
+ cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+ cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
+ value_to_self_msat,
+
+ pending_inbound_htlcs: Vec::new(),
+ pending_outbound_htlcs: Vec::new(),
+ holding_cell_htlc_updates: Vec::new(),
+ pending_update_fee: None,
+ holding_cell_update_fee: None,
+ next_holder_htlc_id: 0,
+ next_counterparty_htlc_id: 0,
+ update_time_counter: 1,
+
+ resend_order: RAACommitmentOrder::CommitmentFirst,
+
+ monitor_pending_channel_ready: false,
+ monitor_pending_revoke_and_ack: false,
+ monitor_pending_commitment_signed: false,
+ monitor_pending_forwards: Vec::new(),
+ monitor_pending_failures: Vec::new(),
+ monitor_pending_finalized_fulfills: Vec::new(),
+
+ signer_pending_commitment_update: false,
+ signer_pending_funding: false,
+
+ #[cfg(debug_assertions)]
+ holder_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
+ #[cfg(debug_assertions)]
+ counterparty_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
+
+ last_sent_closing_fee: None,
+ pending_counterparty_closing_signed: None,
+ expecting_peer_commitment_signed: false,
+ closing_fee_limits: None,
+ target_closing_feerate_sats_per_kw: None,
+
+ funding_tx_confirmed_in: None,
+ funding_tx_confirmation_height: 0,
+ short_channel_id: None,
+ channel_creation_height: current_chain_height,
+
+ feerate_per_kw: commitment_feerate,
+ counterparty_dust_limit_satoshis: 0,
+ holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
+ counterparty_max_htlc_value_in_flight_msat: 0,
+ holder_max_htlc_value_in_flight_msat: get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &config.channel_handshake_config),
+ counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel
+ holder_selected_channel_reserve_satoshis,
+ counterparty_htlc_minimum_msat: 0,
+ holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
+ counterparty_max_accepted_htlcs: 0,
+ holder_max_accepted_htlcs: cmp::min(config.channel_handshake_config.our_max_accepted_htlcs, MAX_HTLCS),
+ minimum_depth: None, // Filled in in accept_channel
+
+ counterparty_forwarding_info: None,
+
+ channel_transaction_parameters: ChannelTransactionParameters {
+ holder_pubkeys: pubkeys,
+ holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
+ is_outbound_from_holder: true,
+ counterparty_parameters: None,
+ funding_outpoint: None,
+ channel_type_features: channel_type.clone()
+ },
+ funding_transaction: None,
+ is_batch_funding: None,
+
+ counterparty_cur_commitment_point: None,
+ counterparty_prev_commitment_point: None,
+ counterparty_node_id,
+
+ counterparty_shutdown_scriptpubkey: None,
+
+ commitment_secrets: CounterpartyCommitmentSecrets::new(),
+
+ channel_update_status: ChannelUpdateStatus::Enabled,
+ closing_signed_in_flight: false,
+
+ announcement_sigs: None,
+
+ #[cfg(any(test, fuzzing))]
+ next_local_commitment_tx_fee_info_cached: Mutex::new(None),
+ #[cfg(any(test, fuzzing))]
+ next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
+
+ workaround_lnd_bug_4006: None,
+ sent_message_awaiting_response: None,
+
+ latest_inbound_scid_alias: None,
+ outbound_scid_alias,
+
+ channel_pending_event_emitted: false,
+ channel_ready_event_emitted: false,
+
+ #[cfg(any(test, fuzzing))]
+ historical_inbound_htlc_fulfills: new_hash_set(),
+
+ channel_type,
+ channel_keys_id,
+
+ blocked_monitor_updates: Vec::new(),
+ local_initiated_shutdown: None,
+ })
+ }
+
/// Allowed in any state (including after shutdown)
pub fn get_update_time_counter(&self) -> u32 {
self.update_time_counter
where ES::Target: EntropySource,
F::Target: FeeEstimator
{
- let holder_selected_contest_delay = config.channel_handshake_config.our_to_self_delay;
- let channel_keys_id = signer_provider.generate_channel_keys_id(false, channel_value_satoshis, user_id);
- let holder_signer = signer_provider.derive_channel_signer(channel_value_satoshis, channel_keys_id);
- let pubkeys = holder_signer.pubkeys().clone();
-
- if !their_features.supports_wumbo() && channel_value_satoshis > MAX_FUNDING_SATOSHIS_NO_WUMBO {
- return Err(APIError::APIMisuseError{err: format!("funding_value must not exceed {}, it was {}", MAX_FUNDING_SATOSHIS_NO_WUMBO, channel_value_satoshis)});
- }
- if channel_value_satoshis >= TOTAL_BITCOIN_SUPPLY_SATOSHIS {
- return Err(APIError::APIMisuseError{err: format!("funding_value must be smaller than the total bitcoin supply, it was {}", channel_value_satoshis)});
- }
- let channel_value_msat = channel_value_satoshis * 1000;
- if push_msat > channel_value_msat {
- return Err(APIError::APIMisuseError { err: format!("Push value ({}) was larger than channel_value ({})", push_msat, channel_value_msat) });
- }
- if holder_selected_contest_delay < BREAKDOWN_TIMEOUT {
- 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 = get_holder_selected_channel_reserve_satoshis(channel_value_satoshis, config);
- if holder_selected_channel_reserve_satoshis < MIN_CHAN_DUST_LIMIT_SATOSHIS {
- // Protocol level safety check in place, although it should never happen because
- // of `MIN_THEIR_CHAN_RESERVE_SATOSHIS`
- return Err(APIError::APIMisuseError { err: format!("Holder selected channel reserve below implemention limit dust_limit_satoshis {}", holder_selected_channel_reserve_satoshis) });
- }
-
let channel_type = Self::get_initial_channel_type(&config, their_features);
- debug_assert!(channel_type.is_subset(&channelmanager::provided_channel_type_features(&config)));
-
- let (commitment_conf_target, anchor_outputs_value_msat) = if channel_type.supports_anchors_zero_fee_htlc_tx() {
- (ConfirmationTarget::AnchorChannelFee, ANCHOR_OUTPUT_VALUE_SATOSHI * 2 * 1000)
- } else {
- (ConfirmationTarget::NonAnchorChannelFee, 0)
- };
- let commitment_feerate = fee_estimator.bounded_sat_per_1000_weight(commitment_conf_target);
-
- let value_to_self_msat = channel_value_satoshis * 1000 - push_msat;
- let commitment_tx_fee = commit_tx_fee_msat(commitment_feerate, MIN_AFFORDABLE_HTLC_COUNT, &channel_type);
- if value_to_self_msat.saturating_sub(anchor_outputs_value_msat) < commitment_tx_fee {
- return Err(APIError::APIMisuseError{ err: format!("Funding amount ({}) can't even pay fee for initial commitment transaction fee of {}.", value_to_self_msat / 1000, commitment_tx_fee / 1000) });
- }
-
- let mut secp_ctx = Secp256k1::new();
- secp_ctx.seeded_randomize(&entropy_source.get_secure_random_bytes());
- let shutdown_scriptpubkey = if config.channel_handshake_config.commit_upfront_shutdown_pubkey {
- match signer_provider.get_shutdown_scriptpubkey() {
- Ok(scriptpubkey) => Some(scriptpubkey),
- Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get shutdown scriptpubkey".to_owned()}),
- }
- } else { None };
-
- if let Some(shutdown_scriptpubkey) = &shutdown_scriptpubkey {
- if !shutdown_scriptpubkey.is_compatible(&their_features) {
- return Err(APIError::IncompatibleShutdownScript { script: shutdown_scriptpubkey.clone() });
- }
- }
-
- let destination_script = match signer_provider.get_destination_script(channel_keys_id) {
- Ok(script) => script,
- Err(_) => return Err(APIError::ChannelUnavailable { err: "Failed to get destination script".to_owned()}),
- };
-
- let temporary_channel_id = temporary_channel_id.unwrap_or_else(|| ChannelId::temporary_from_entropy_source(entropy_source));
-
- Ok(Self {
- context: ChannelContext {
- user_id,
-
- config: LegacyChannelConfig {
- options: config.channel_config.clone(),
- announced_channel: config.channel_handshake_config.announced_channel,
- commit_upfront_shutdown_pubkey: config.channel_handshake_config.commit_upfront_shutdown_pubkey,
- },
-
- prev_config: None,
-
- inbound_handshake_limits_override: Some(config.channel_handshake_limits.clone()),
-
- channel_id: temporary_channel_id,
- temporary_channel_id: Some(temporary_channel_id),
- channel_state: ChannelState::NegotiatingFunding(NegotiatingFundingFlags::OUR_INIT_SENT),
- announcement_sigs_state: AnnouncementSigsState::NotSent,
- secp_ctx,
- channel_value_satoshis,
-
- latest_monitor_update_id: 0,
-
- holder_signer: ChannelSignerType::Ecdsa(holder_signer),
- shutdown_scriptpubkey,
- destination_script,
-
- cur_holder_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
- cur_counterparty_commitment_transaction_number: INITIAL_COMMITMENT_NUMBER,
- value_to_self_msat,
-
- pending_inbound_htlcs: Vec::new(),
- pending_outbound_htlcs: Vec::new(),
- holding_cell_htlc_updates: Vec::new(),
- pending_update_fee: None,
- holding_cell_update_fee: None,
- next_holder_htlc_id: 0,
- next_counterparty_htlc_id: 0,
- update_time_counter: 1,
-
- resend_order: RAACommitmentOrder::CommitmentFirst,
-
- monitor_pending_channel_ready: false,
- monitor_pending_revoke_and_ack: false,
- monitor_pending_commitment_signed: false,
- monitor_pending_forwards: Vec::new(),
- monitor_pending_failures: Vec::new(),
- monitor_pending_finalized_fulfills: Vec::new(),
-
- signer_pending_commitment_update: false,
- signer_pending_funding: false,
-
- #[cfg(debug_assertions)]
- holder_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
- #[cfg(debug_assertions)]
- counterparty_max_commitment_tx_output: Mutex::new((channel_value_satoshis * 1000 - push_msat, push_msat)),
-
- last_sent_closing_fee: None,
- pending_counterparty_closing_signed: None,
- expecting_peer_commitment_signed: false,
- closing_fee_limits: None,
- target_closing_feerate_sats_per_kw: None,
-
- funding_tx_confirmed_in: None,
- funding_tx_confirmation_height: 0,
- short_channel_id: None,
- channel_creation_height: current_chain_height,
-
- feerate_per_kw: commitment_feerate,
- counterparty_dust_limit_satoshis: 0,
- holder_dust_limit_satoshis: MIN_CHAN_DUST_LIMIT_SATOSHIS,
- counterparty_max_htlc_value_in_flight_msat: 0,
- holder_max_htlc_value_in_flight_msat: get_holder_max_htlc_value_in_flight_msat(channel_value_satoshis, &config.channel_handshake_config),
- counterparty_selected_channel_reserve_satoshis: None, // Filled in in accept_channel
- holder_selected_channel_reserve_satoshis,
- counterparty_htlc_minimum_msat: 0,
- holder_htlc_minimum_msat: if config.channel_handshake_config.our_htlc_minimum_msat == 0 { 1 } else { config.channel_handshake_config.our_htlc_minimum_msat },
- counterparty_max_accepted_htlcs: 0,
- holder_max_accepted_htlcs: cmp::min(config.channel_handshake_config.our_max_accepted_htlcs, MAX_HTLCS),
- minimum_depth: None, // Filled in in accept_channel
-
- counterparty_forwarding_info: None,
-
- channel_transaction_parameters: ChannelTransactionParameters {
- holder_pubkeys: pubkeys,
- holder_selected_contest_delay: config.channel_handshake_config.our_to_self_delay,
- is_outbound_from_holder: true,
- counterparty_parameters: None,
- funding_outpoint: None,
- channel_type_features: channel_type.clone()
- },
- funding_transaction: None,
- is_batch_funding: None,
-
- counterparty_cur_commitment_point: None,
- counterparty_prev_commitment_point: None,
+ let chan = Self {
+ context: ChannelContext::new_for_outbound_channel(
+ fee_estimator,
+ entropy_source,
+ signer_provider,
counterparty_node_id,
-
- counterparty_shutdown_scriptpubkey: None,
-
- commitment_secrets: CounterpartyCommitmentSecrets::new(),
-
- channel_update_status: ChannelUpdateStatus::Enabled,
- closing_signed_in_flight: false,
-
- announcement_sigs: None,
-
- #[cfg(any(test, fuzzing))]
- next_local_commitment_tx_fee_info_cached: Mutex::new(None),
- #[cfg(any(test, fuzzing))]
- next_remote_commitment_tx_fee_info_cached: Mutex::new(None),
-
- workaround_lnd_bug_4006: None,
- sent_message_awaiting_response: None,
-
- latest_inbound_scid_alias: None,
+ their_features,
+ channel_value_satoshis,
+ push_msat,
+ user_id,
+ config,
+ current_chain_height,
outbound_scid_alias,
-
- channel_pending_event_emitted: false,
- channel_ready_event_emitted: false,
-
- #[cfg(any(test, fuzzing))]
- historical_inbound_htlc_fulfills: new_hash_set(),
-
+ temporary_channel_id,
channel_type,
- channel_keys_id,
-
- blocked_monitor_updates: Vec::new(),
- local_initiated_shutdown: None,
- },
+ )?,
unfunded_context: UnfundedChannelContext { unfunded_channel_age_ticks: 0 }
- })
+ };
+ Ok(chan)
}
/// Only allowed after [`ChannelContext::channel_transaction_parameters`] is set.
projects / rust-lightning / commitdiff