use bitcoin::blockdata::block::BlockHeader; use bitcoin::blockdata::script::{Script,Builder}; use bitcoin::blockdata::transaction::{TxIn, TxOut, Transaction, SigHashType}; use bitcoin::blockdata::opcodes; use bitcoin::util::uint::Uint256; use bitcoin::util::hash::{Sha256dHash, Hash160}; use bitcoin::util::bip143; use bitcoin::network::serialize::BitcoinHash; use secp256k1::key::{PublicKey,SecretKey}; use secp256k1::{Secp256k1,Message,Signature}; use secp256k1; use crypto::digest::Digest; use crypto::hkdf::{hkdf_extract,hkdf_expand}; use ln::msgs; use ln::msgs::{HandleError, MsgEncodable}; use ln::channelmonitor::ChannelMonitor; use ln::channelmanager::PendingForwardHTLCInfo; use ln::chan_utils::{TxCreationKeys,HTLCOutputInCommitment}; use ln::chan_utils; use chain::chaininterface::{FeeEstimator,ConfirmationTarget}; use util::{transaction_utils,rng}; use util::sha2::Sha256; use std::default::Default; use std::cmp; use std::time::Instant; pub struct ChannelKeys { pub funding_key: SecretKey, pub revocation_base_key: SecretKey, pub payment_base_key: SecretKey, pub delayed_payment_base_key: SecretKey, pub htlc_base_key: SecretKey, pub channel_close_key: SecretKey, pub channel_monitor_claim_key: SecretKey, pub commitment_seed: [u8; 32], } impl ChannelKeys { pub fn new_from_seed(seed: &[u8; 32]) -> Result { let mut prk = [0; 32]; hkdf_extract(Sha256::new(), b"rust-lightning key gen salt", seed, &mut prk); let secp_ctx = Secp256k1::new(); let mut okm = [0; 32]; hkdf_expand(Sha256::new(), &prk, b"rust-lightning funding key info", &mut okm); let funding_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning revocation base key info", &mut okm); let revocation_base_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning payment base key info", &mut okm); let payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning delayed payment base key info", &mut okm); let delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning htlc base key info", &mut okm); let htlc_base_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel close key info", &mut okm); let channel_close_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning channel monitor claim key info", &mut okm); let channel_monitor_claim_key = SecretKey::from_slice(&secp_ctx, &okm)?; hkdf_expand(Sha256::new(), &prk, b"rust-lightning local commitment seed info", &mut okm); Ok(ChannelKeys { funding_key: funding_key, revocation_base_key: revocation_base_key, payment_base_key: payment_base_key, delayed_payment_base_key: delayed_payment_base_key, htlc_base_key: htlc_base_key, channel_close_key: channel_close_key, channel_monitor_claim_key: channel_monitor_claim_key, commitment_seed: okm }) } } #[derive(PartialEq)] enum HTLCState { RemoteAnnounced, LocalAnnounced, Committed, } struct HTLCOutput { outbound: bool, // ie to an HTLC-Timeout transaction htlc_id: u64, amount_msat: u64, cltv_expiry: u32, payment_hash: [u8; 32], state: HTLCState, // state == RemoteAnnounced implies pending_forward_state, otherwise it must be None pending_forward_state: Option, } impl HTLCOutput { fn get_in_commitment(&self, offered: bool) -> HTLCOutputInCommitment { HTLCOutputInCommitment { offered: offered, amount_msat: self.amount_msat, cltv_expiry: self.cltv_expiry, payment_hash: self.payment_hash, transaction_output_index: 0 } } } /// See AwaitingRemoteRevoke ChannelState for more info struct HTLCOutputAwaitingACK { // always outbound amount_msat: u64, cltv_expiry: u32, payment_hash: [u8; 32], onion_routing_packet: msgs::OnionPacket, time_created: Instant, //TODO: Some kind of timeout thing-a-majig } enum ChannelState { /// Implies we have (or are prepared to) send our open_channel/accept_channel message OurInitSent = (1 << 0), /// Implies we have received their open_channel/accept_channel message TheirInitSent = (1 << 1), /// We have sent funding_created and are awaiting a funding_signed to advance to FundingSent. /// Note that this is nonsense for an inbound channel as we immediately generate funding_signed /// upon receipt of funding_created, so simply skip this state. FundingCreated = 4, /// Set when we have received/sent funding_created and funding_signed and are thus now waiting /// on the funding transaction to confirm. The FundingLocked flags are set to indicate when we /// and our counterparty consider the funding transaction confirmed. FundingSent = 8, /// Flag which can be set on FundingSent to indicate they sent us a funding_locked message. /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded. TheirFundingLocked = (1 << 4), /// Flag which can be set on FundingSent to indicate we sent them a funding_locked message. /// Once both TheirFundingLocked and OurFundingLocked are set, state moves on to ChannelFunded. OurFundingLocked = (1 << 5), ChannelFunded = 64, /// Flag which implies that we have sent a commitment_signed but are awaiting the responding /// revoke_and_ack message. During this time period, we can't generate new commitment_signed /// messages as then we will be unable to determine which HTLCs they included in their /// revoke_and_ack implicit ACK, so instead we have to hold them away temporarily to be sent /// later. /// Flag is set on ChannelFunded. AwaitingRemoteRevoke = (1 << 7), } // TODO: We should refactor this to be an Inbound/OutboundChannel until initial setup handshaking // has been completed, and then turn into a Channel to get compiler-time enforcement of things like // calling get_channel_id() before we're set up or things like get_outbound_funding_signed on an // inbound channel. pub struct Channel { user_id: u64, channel_id: Uint256, channel_state: u32, channel_outbound: bool, secp_ctx: Secp256k1, announce_publicly: bool, channel_value_satoshis: u64, local_keys: ChannelKeys, cur_local_commitment_transaction_number: u64, cur_remote_commitment_transaction_number: u64, value_to_self_msat: u64, // Excluding all pending_htlcs, excluding fees pending_htlcs: Vec, holding_cell_htlcs: Vec, next_local_htlc_id: u64, next_remote_htlc_id: u64, channel_update_count: u32, feerate_per_kw: u64, /// The hash of the block in which the funding transaction reached our CONF_TARGET. We use this /// to detect unconfirmation after a serialize-unserialize roudtrip where we may not see a full /// series of block_connected/block_disconnected calls. Obviously this is not a guarantee as we /// could miss the funding_tx_confirmed_in block as well, but it serves as a useful fallback. funding_tx_confirmed_in: Sha256dHash, short_channel_id: Option, /// Used to deduplicate block_connected callbacks last_block_connected: Sha256dHash, funding_tx_confirmations: u64, their_dust_limit_satoshis: u64, our_dust_limit_satoshis: u64, their_max_htlc_value_in_flight_msat: u64, //get_our_max_htlc_value_in_flight_msat(): u64, their_channel_reserve_satoshis: u64, //get_our_channel_reserve_satoshis(): u64, their_htlc_minimum_msat: u64, our_htlc_minimum_msat: u64, their_to_self_delay: u16, //implied by BREAKDOWN_TIMEOUT: our_to_self_delay: u16, their_max_accepted_htlcs: u16, //implied by OUR_MAX_HTLCS: our_max_accepted_htlcs: u16, their_funding_pubkey: PublicKey, their_revocation_basepoint: PublicKey, their_payment_basepoint: PublicKey, their_delayed_payment_basepoint: PublicKey, their_htlc_basepoint: PublicKey, their_cur_commitment_point: PublicKey, their_node_id: PublicKey, channel_monitor: ChannelMonitor, } const OUR_MAX_HTLCS: u16 = 5; //TODO const CONF_TARGET: u32 = 12; //TODO: Should be much higher /// Confirmation count threshold at which we close a channel. Ideally we'd keep the channel around /// on ice until the funding transaction gets more confirmations, but the LN protocol doesn't /// really allow for this, so instead we're stuck closing it out at that point. const UNCONF_THRESHOLD: u32 = 6; /// The amount of time we require our counterparty wait to claim their money (ie time between when /// we, or our watchtower, must check for them having broadcast a theft transaction). const BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 7; //TODO? /// The amount of time we're willing to wait to claim money back to us const MAX_LOCAL_BREAKDOWN_TIMEOUT: u16 = 6 * 24 * 14; const COMMITMENT_TX_BASE_WEIGHT: u64 = 724; const COMMITMENT_TX_WEIGHT_PER_HTLC: u64 = 172; const HTLC_SUCCESS_TX_WEIGHT: u64 = 703; const HTLC_TIMEOUT_TX_WEIGHT: u64 = 663; const SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT: u64 = 79; // prevout: 36, nSequence: 4, script len: 1, witness lengths: (3+1)/4, sig: 73/4, if-selector: 1, redeemScript: (6 ops + 2*33 pubkeys + 1*2 delay)/4 const B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT: u64 = 104; // prevout: 40, nSequence: 4, script len: 1, witness lengths: 3/4, sig: 73/4, pubkey: 33/4, output: 31 (TODO: Wrong? Useless?) macro_rules! secp_call { ( $res : expr ) => { match $res { Ok(key) => key, //TODO: make the error a parameter Err(_) => return Err(HandleError{err: "Secp call failed - probably bad signature or evil data generated a bad pubkey/privkey", msg: None}) } }; } macro_rules! get_key { ( $ctx : expr, $slice : expr ) => { secp_call! (SecretKey::from_slice($ctx, $slice)) }; } impl Channel { // Convert constants + channel value to limits: fn get_our_max_htlc_value_in_flight_msat(channel_value_satoshis: u64) -> u64 { channel_value_satoshis * 1000 / 10 //TODO } /// Guaranteed to return a value no larger than channel_value_satoshis fn get_our_channel_reserve_satoshis(channel_value_satoshis: u64) -> u64 { cmp::min(channel_value_satoshis, 10) //TODO } fn derive_our_dust_limit_satoshis(at_open_background_feerate: u64) -> u64 { at_open_background_feerate * B_OUTPUT_PLUS_SPENDING_INPUT_WEIGHT //TODO } fn derive_our_htlc_minimum_msat(_at_open_channel_feerate_per_kw: u64) -> u64 { 1000 // TODO } // Constructors: /// panics if channel_value_satoshis is >= (1 << 24) pub fn new_outbound(fee_estimator: &FeeEstimator, their_node_id: PublicKey, channel_value_satoshis: u64, announce_publicly: bool, user_id: u64) -> Channel { if channel_value_satoshis >= (1 << 24) { panic!("funding value > 2^24"); } let feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal); let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background); let mut key_seed = [0u8; 32]; rng::fill_bytes(&mut key_seed); let chan_keys = match ChannelKeys::new_from_seed(&key_seed) { Ok(key) => key, Err(_) => panic!("RNG is busted!") }; let secp_ctx = Secp256k1::new(); let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize()); let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script(); let channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key, &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(), BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script); Channel { user_id: user_id, channel_id: rng::rand_uint256(), channel_state: ChannelState::OurInitSent as u32, channel_outbound: true, secp_ctx: secp_ctx, announce_publicly: announce_publicly, channel_value_satoshis: channel_value_satoshis, local_keys: chan_keys, cur_local_commitment_transaction_number: (1 << 48) - 1, cur_remote_commitment_transaction_number: (1 << 48) - 1, value_to_self_msat: channel_value_satoshis * 1000, //TODO: give them something on open? Parameterize it? pending_htlcs: Vec::new(), holding_cell_htlcs: Vec::new(), next_local_htlc_id: 0, next_remote_htlc_id: 0, channel_update_count: 0, funding_tx_confirmed_in: Default::default(), short_channel_id: None, last_block_connected: Default::default(), funding_tx_confirmations: 0, feerate_per_kw: feerate * 250, their_dust_limit_satoshis: 0, our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate), their_max_htlc_value_in_flight_msat: 0, their_channel_reserve_satoshis: 0, their_htlc_minimum_msat: 0, our_htlc_minimum_msat: Channel::derive_our_htlc_minimum_msat(feerate * 250), their_to_self_delay: 0, their_max_accepted_htlcs: 0, their_funding_pubkey: PublicKey::new(), their_revocation_basepoint: PublicKey::new(), their_payment_basepoint: PublicKey::new(), their_delayed_payment_basepoint: PublicKey::new(), their_htlc_basepoint: PublicKey::new(), their_cur_commitment_point: PublicKey::new(), their_node_id: their_node_id, channel_monitor: channel_monitor, } } fn check_remote_fee(fee_estimator: &FeeEstimator, feerate_per_kw: u32) -> Result<(), HandleError> { if (feerate_per_kw as u64) < fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background) * 250 { return Err(HandleError{err: "Peer's feerate much too low", msg: None}); } if (feerate_per_kw as u64) > fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::HighPriority) * 375 { // 375 = 250 * 1.5x return Err(HandleError{err: "Peer's feerate much too high", msg: None}); } Ok(()) } /// Creates a new channel from a remote sides' request for one. /// Assumes chain_hash has already been checked and corresponds with what we expect! pub fn new_from_req(fee_estimator: &FeeEstimator, their_node_id: PublicKey, msg: &msgs::OpenChannel, user_id: u64, announce_publicly: bool) -> Result { // Check sanity of message fields: if msg.funding_satoshis >= (1 << 24) { return Err(HandleError{err: "funding value > 2^24", msg: None}); } if msg.funding_satoshis > 21000000 * 100000000 { return Err(HandleError{err: "More funding_satoshis than there are satoshis!", msg: None}); } if msg.channel_reserve_satoshis > msg.funding_satoshis { return Err(HandleError{err: "Bogus channel_reserve_satoshis", msg: None}); } if msg.push_msat > (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 { return Err(HandleError{err: "push_msat more than highest possible value", msg: None}); } if msg.dust_limit_satoshis > 21000000 * 100000000 { return Err(HandleError{err: "Peer never wants payout outputs?", msg: None}); } if msg.max_htlc_value_in_flight_msat > msg.funding_satoshis * 1000 { return Err(HandleError{err: "Bogus max_htlc_value_in_flight_satoshis", msg: None}); } if msg.htlc_minimum_msat >= (msg.funding_satoshis - msg.channel_reserve_satoshis) * 1000 { return Err(HandleError{err: "Minimum htlc value is full channel value", msg: None}); } Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw)?; if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT { return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", msg: None}); } if msg.max_accepted_htlcs < 1 { return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", msg: None}); } if (msg.channel_flags & 254) != 0 { return Err(HandleError{err: "unknown channel_flags", msg: None}); } // Convert things into internal flags and prep our state: let their_announce = if (msg.channel_flags & 1) == 1 { true } else { false }; let background_feerate = fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background); let mut key_seed = [0u8; 32]; rng::fill_bytes(&mut key_seed); let chan_keys = match ChannelKeys::new_from_seed(&key_seed) { Ok(key) => key, Err(_) => panic!("RNG is busted!") }; let secp_ctx = Secp256k1::new(); let our_channel_monitor_claim_key_hash = Hash160::from_data(&PublicKey::from_secret_key(&secp_ctx, &chan_keys.channel_monitor_claim_key).unwrap().serialize()); let our_channel_monitor_claim_script = Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script(); let mut channel_monitor = ChannelMonitor::new(&chan_keys.revocation_base_key, &PublicKey::from_secret_key(&secp_ctx, &chan_keys.delayed_payment_base_key).unwrap(), &PublicKey::from_secret_key(&secp_ctx, &chan_keys.htlc_base_key).unwrap(), BREAKDOWN_TIMEOUT, our_channel_monitor_claim_script); channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint); let mut chan = Channel { user_id: user_id, channel_id: msg.temporary_channel_id, channel_state: (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32), channel_outbound: false, secp_ctx: secp_ctx, announce_publicly: their_announce && announce_publicly, local_keys: chan_keys, cur_local_commitment_transaction_number: (1 << 48) - 1, cur_remote_commitment_transaction_number: (1 << 48) - 1, value_to_self_msat: msg.push_msat, pending_htlcs: Vec::new(), holding_cell_htlcs: Vec::new(), next_local_htlc_id: 0, next_remote_htlc_id: 0, channel_update_count: 0, funding_tx_confirmed_in: Default::default(), short_channel_id: None, last_block_connected: Default::default(), funding_tx_confirmations: 0, feerate_per_kw: msg.feerate_per_kw as u64, channel_value_satoshis: msg.funding_satoshis, their_dust_limit_satoshis: msg.dust_limit_satoshis, our_dust_limit_satoshis: Channel::derive_our_dust_limit_satoshis(background_feerate), their_max_htlc_value_in_flight_msat: msg.max_htlc_value_in_flight_msat, their_channel_reserve_satoshis: msg.channel_reserve_satoshis, their_htlc_minimum_msat: msg.htlc_minimum_msat, 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, their_funding_pubkey: msg.funding_pubkey, their_revocation_basepoint: msg.revocation_basepoint, their_payment_basepoint: msg.payment_basepoint, their_delayed_payment_basepoint: msg.delayed_payment_basepoint, their_htlc_basepoint: msg.htlc_basepoint, their_cur_commitment_point: msg.first_per_commitment_point, their_node_id: their_node_id, channel_monitor: channel_monitor, }; let obscure_factor = chan.get_commitment_transaction_number_obscure_factor(); chan.channel_monitor.set_commitment_obscure_factor(obscure_factor); Ok(chan) } // Utilities to derive keys: fn build_local_commitment_secret(&self, idx: u64) -> Result { let res = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, idx); Ok(get_key!(&self.secp_ctx, &res)) } // Utilities to build transactions: fn get_commitment_transaction_number_obscure_factor(&self) -> u64 { let mut sha = Sha256::new(); let our_payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(); if self.channel_outbound { sha.input(&our_payment_basepoint.serialize()); sha.input(&self.their_payment_basepoint.serialize()); } else { sha.input(&self.their_payment_basepoint.serialize()); sha.input(&our_payment_basepoint.serialize()); } let mut res = [0; 32]; sha.result(&mut res); ((res[26] as u64) << 5*8) | ((res[27] as u64) << 4*8) | ((res[28] as u64) << 3*8) | ((res[29] as u64) << 2*8) | ((res[30] as u64) << 1*8) | ((res[31] as u64) << 0*8) } /// Transaction nomenclature is somewhat confusing here as there are many different cases - a /// transaction is referred to as "a's transaction" implying that a will be able to broadcast /// the transaction. Thus, b will generally be sending a signature over such a transaction to /// a, and a can revoke the transaction by providing b the relevant per_commitment_secret. As /// such, a transaction is generally the result of b increasing the amount paid to a (or adding /// an HTLC to a). /// @local is used only to convert relevant internal structures which refer to remote vs local /// to decide value of outputs and direction of HTLCs. /// @generated_by_local is used to determine *which* HTLCs to include - noting that the HTLC /// state may indicate that one peer has informed the other that they'd like to add an HTLC but /// have not yet committed it. Such HTLCs will only be included in transactions which are being /// generated by the peer which proposed adding the HTLCs, and thus we need to understand both /// which peer generated this transaction and "to whom" this transaction flows. #[inline] fn build_commitment_transaction(&self, commitment_number: u64, keys: &TxCreationKeys, local: bool, generated_by_local: bool) -> Result<(Transaction, Vec), HandleError> { let obscured_commitment_transaction_number = self.get_commitment_transaction_number_obscure_factor() ^ commitment_number; let txins = { let mut ins: Vec = Vec::new(); ins.push(TxIn { prev_hash: self.channel_monitor.get_funding_txo().unwrap().0, prev_index: self.channel_monitor.get_funding_txo().unwrap().1 as u32, script_sig: Script::new(), sequence: ((0x80 as u32) << 8*3) | ((obscured_commitment_transaction_number >> 3*8) as u32) }); ins }; let mut witness: Vec>> = Vec::new(); witness.push(Vec::new()); let mut txouts: Vec<(TxOut, Option)> = Vec::new(); let dust_limit_satoshis = if local { self.our_dust_limit_satoshis } else { self.their_dust_limit_satoshis }; let mut remote_htlc_total_msat = 0; let mut local_htlc_total_msat = 0; for ref htlc in self.pending_htlcs.iter() { if htlc.state == HTLCState::Committed || htlc.state == (if generated_by_local { HTLCState::LocalAnnounced } else { HTLCState::RemoteAnnounced }) { if htlc.outbound == local { // "offered HTLC output" if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000) { let htlc_in_tx = htlc.get_in_commitment(true); txouts.push((TxOut { script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys, true).to_v0_p2wsh(), value: htlc.amount_msat / 1000 }, Some(htlc_in_tx))); } } else { if htlc.amount_msat / 1000 >= dust_limit_satoshis + (self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000) { let htlc_in_tx = htlc.get_in_commitment(false); txouts.push((TxOut { // "received HTLC output" script_pubkey: chan_utils::get_htlc_redeemscript(&htlc_in_tx, &keys, false).to_v0_p2wsh(), value: htlc.amount_msat / 1000 }, Some(htlc_in_tx))); } }; if htlc.outbound { local_htlc_total_msat += htlc.amount_msat; } else { remote_htlc_total_msat += htlc.amount_msat; } } } let total_fee: u64 = self.feerate_per_kw * (COMMITMENT_TX_BASE_WEIGHT + (txouts.len() as u64) * COMMITMENT_TX_WEIGHT_PER_HTLC) / 1000; let value_to_self: i64 = ((self.value_to_self_msat - local_htlc_total_msat) as i64) / 1000 - if self.channel_outbound { total_fee as i64 } else { 0 }; let value_to_remote: i64 = (((self.channel_value_satoshis * 1000 - self.value_to_self_msat - remote_htlc_total_msat) / 1000) as i64) - if self.channel_outbound { 0 } else { total_fee as i64 }; let value_to_a = if local { value_to_self } else { value_to_remote }; let value_to_b = if local { value_to_remote } else { value_to_self }; if value_to_a >= (dust_limit_satoshis as i64) { txouts.push((TxOut { script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key, if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT }, &keys.a_delayed_payment_key).to_v0_p2wsh(), value: value_to_a as u64 }, None)); } if value_to_b >= (dust_limit_satoshis as i64) { txouts.push((TxOut { script_pubkey: Builder::new().push_opcode(opcodes::All::OP_PUSHBYTES_0) .push_slice(&Hash160::from_data(&keys.b_payment_key.serialize())[..]) .into_script(), value: value_to_b as u64 }, None)); } transaction_utils::sort_outputs(&mut txouts); let mut outputs: Vec = Vec::new(); let mut htlcs_used: Vec = Vec::new(); for (idx, out) in txouts.drain(..).enumerate() { outputs.push(out.0); match out.1 { Some(out_htlc) => { htlcs_used.push(out_htlc); htlcs_used.last_mut().unwrap().transaction_output_index = idx as u32; }, None => {} } } Ok((Transaction { version: 2, lock_time: ((0x20 as u32) << 8*3) | ((obscured_commitment_transaction_number & 0xffffffu64) as u32), input: txins, output: outputs, witness: witness }, htlcs_used)) } #[inline] /// Creates a set of keys for build_commitment_transaction to generate a transaction which our /// counterparty will sign (ie DO NOT send signatures over a transaction created by this to /// our counterparty!) /// The result is a transaction which we can revoke ownership of (ie a "local" transaction) /// TODO Some magic rust shit to compile-time check this? fn build_local_transaction_keys(&self, commitment_number: u64) -> Result { let per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(commitment_number)?).unwrap(); let delayed_payment_base = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(); let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(); Ok(secp_call!(TxCreationKeys::new(&self.secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &self.their_revocation_basepoint, &self.their_payment_basepoint, &self.their_htlc_basepoint))) } #[inline] /// Creates a set of keys for build_commitment_transaction to generate a transaction which we /// will sign and send to our counterparty. fn build_remote_transaction_keys(&self) -> Result { //TODO: Ensure that the payment_key derived here ends up in the library users' wallet as we //may see payments to it! let payment_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(); let revocation_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(); let htlc_basepoint = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(); Ok(secp_call!(TxCreationKeys::new(&self.secp_ctx, &self.their_cur_commitment_point, &self.their_delayed_payment_basepoint, &self.their_htlc_basepoint, &revocation_basepoint, &payment_basepoint, &htlc_basepoint))) } /// Gets the redeemscript for the funding transaction output (ie the funding transaction output /// pays to get_funding_redeemscript().to_v0_p2wsh()). pub fn get_funding_redeemscript(&self) -> Script { let builder = Builder::new().push_opcode(opcodes::All::OP_PUSHNUM_2); let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize(); let their_funding_key = self.their_funding_pubkey.serialize(); if our_funding_key[..] < their_funding_key[..] { builder.push_slice(&our_funding_key) .push_slice(&their_funding_key) } else { builder.push_slice(&their_funding_key) .push_slice(&our_funding_key) }.push_opcode(opcodes::All::OP_PUSHNUM_2).push_opcode(opcodes::All::OP_CHECKMULTISIG).into_script() } fn sign_commitment_transaction(&self, tx: &mut Transaction, their_sig: &Signature) -> Result<(), HandleError> { if tx.input.len() != 1 { panic!("Tried to sign commitment transaction that had input count != 1!"); } if tx.witness.len() != 1 || tx.witness[0].len() != 0 { panic!("Tried to re-sign commitment transaction"); } let funding_redeemscript = self.get_funding_redeemscript(); let sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx, 0, &funding_redeemscript, self.channel_value_satoshis)[..])); let our_sig = secp_call!(self.secp_ctx.sign(&sighash, &self.local_keys.funding_key)); tx.witness[0].push(Vec::new()); // First is the multisig dummy let our_funding_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap().serialize(); let their_funding_key = self.their_funding_pubkey.serialize(); if our_funding_key[..] < their_funding_key[..] { tx.witness[0].push(our_sig.serialize_der(&self.secp_ctx).to_vec()); tx.witness[0].push(their_sig.serialize_der(&self.secp_ctx).to_vec()); } else { tx.witness[0].push(their_sig.serialize_der(&self.secp_ctx).to_vec()); tx.witness[0].push(our_sig.serialize_der(&self.secp_ctx).to_vec()); } tx.witness[0][1].push(SigHashType::All as u8); tx.witness[0][2].push(SigHashType::All as u8); tx.witness[0].push(funding_redeemscript.into_vec()); Ok(()) } /// Builds the htlc-success or htlc-timeout transaction which spends a given HTLC output /// @local is used only to convert relevant internal structures which refer to remote vs local /// to decide value of outputs and direction of HTLCs. fn build_htlc_transaction(&self, prev_hash: &Sha256dHash, htlc: &HTLCOutputInCommitment, local: bool, keys: &TxCreationKeys) -> Result { let mut txins: Vec = Vec::new(); txins.push(TxIn { prev_hash: prev_hash.clone(), prev_index: htlc.transaction_output_index, script_sig: Script::new(), sequence: 0 }); let mut witnesses: Vec>> = Vec::new(); witnesses.push(Vec::new()); let total_fee = if htlc.offered { self.feerate_per_kw * HTLC_TIMEOUT_TX_WEIGHT / 1000 } else { self.feerate_per_kw * HTLC_SUCCESS_TX_WEIGHT / 1000 }; let mut txouts: Vec = Vec::new(); txouts.push(TxOut { script_pubkey: chan_utils::get_revokeable_redeemscript(&keys.revocation_key, if local { self.their_to_self_delay } else { BREAKDOWN_TIMEOUT }, &keys.a_delayed_payment_key).to_v0_p2wsh(), value: htlc.amount_msat / 1000 - total_fee //TODO: BOLT 3 does not specify if we should add amount_msat before dividing or if we should divide by 1000 before subtracting (as we do here) }); Ok(Transaction { version: 2, lock_time: if htlc.offered { htlc.cltv_expiry } else { 0 }, input: txins, output: txouts, witness: witnesses }) } /// Signs a transaction created by build_htlc_transaction. If the transaction is an /// HTLC-Success transaction (ie htlc.offered is false), preimate must be set! fn sign_htlc_transaction(&self, tx: &mut Transaction, their_sig: &Signature, preimage: &Option<[u8; 32]>, htlc: &HTLCOutputInCommitment, keys: &TxCreationKeys) -> Result<(), HandleError> { if tx.input.len() != 1 { panic!("Tried to sign HTLC transaction that had input count != 1!"); } if tx.witness.len() != 1 || tx.witness[0].len() != 0 { panic!("Tried to re-sign HTLC transaction"); } let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys, htlc.offered); let our_htlc_key = secp_call!(chan_utils::derive_private_key(&self.secp_ctx, &keys.per_commitment_point, &self.local_keys.htlc_base_key)); let sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&tx).sighash_all(&tx, 0, &htlc_redeemscript, htlc.amount_msat / 1000)[..])); let our_sig = secp_call!(self.secp_ctx.sign(&sighash, &our_htlc_key)); let local_tx = PublicKey::from_secret_key(&self.secp_ctx, &our_htlc_key).unwrap() == keys.a_htlc_key; tx.witness[0].push(Vec::new()); // First is the multisig dummy if local_tx { // b, then a tx.witness[0].push(their_sig.serialize_der(&self.secp_ctx).to_vec()); tx.witness[0].push(our_sig.serialize_der(&self.secp_ctx).to_vec()); } else { tx.witness[0].push(our_sig.serialize_der(&self.secp_ctx).to_vec()); tx.witness[0].push(their_sig.serialize_der(&self.secp_ctx).to_vec()); } tx.witness[0][1].push(SigHashType::All as u8); tx.witness[0][2].push(SigHashType::All as u8); if htlc.offered { tx.witness[0].push(Vec::new()); } else { tx.witness[0].push(preimage.unwrap().to_vec()); } tx.witness[0].push(htlc_redeemscript.into_vec()); Ok(()) } pub fn get_update_fulfill_htlc(&mut self, payment_preimage: [u8; 32]) -> Result { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Was asked to fulfill an HTLC when channel was not in an operational state", msg: None}); } let mut sha = Sha256::new(); sha.input(&payment_preimage); let mut payment_hash = [0; 32]; sha.result(&mut payment_hash); let mut htlc_id = 0; let mut htlc_amount_msat = 0; self.pending_htlcs.retain(|ref htlc| { if !htlc.outbound && htlc.payment_hash == payment_hash { if htlc_id != 0 { panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!"); } htlc_id = htlc.htlc_id; htlc_amount_msat += htlc.amount_msat; false } else { true } }); if htlc_amount_msat == 0 { return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", msg: None}); } //TODO: This is racy af, they may have pending messages in flight to us that will not have //received this yet! self.value_to_self_msat += htlc_amount_msat; Ok(msgs::UpdateFulfillHTLC { channel_id: self.channel_id(), htlc_id: htlc_id, payment_preimage: payment_preimage, }) } pub fn get_update_fail_htlc(&mut self, payment_hash: &[u8; 32], err_packet: msgs::OnionErrorPacket) -> Result { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Was asked to fail an HTLC when channel was not in an operational state", msg: None}); } let mut htlc_id = 0; let mut htlc_amount_msat = 0; self.pending_htlcs.retain(|ref htlc| { if !htlc.outbound && htlc.payment_hash == *payment_hash { if htlc_id != 0 { panic!("Duplicate HTLC payment_hash, you probably re-used payment preimages, NEVER DO THIS!"); } htlc_id = htlc.htlc_id; htlc_amount_msat += htlc.amount_msat; false } else { true } }); if htlc_amount_msat == 0 { return Err(HandleError{err: "Unable to find a pending HTLC which matched the given payment preimage", msg: None}); } //TODO: This is racy af, they may have pending messages in flight to us that will not have //received this yet! Ok(msgs::UpdateFailHTLC { channel_id: self.channel_id(), htlc_id, reason: err_packet }) } // Message handlers: pub fn accept_channel(&mut self, msg: &msgs::AcceptChannel) -> Result<(), HandleError> { // Check sanity of message fields: if !self.channel_outbound { return Err(HandleError{err: "Got an accept_channel message from an inbound peer", msg: None}); } if self.channel_state != ChannelState::OurInitSent as u32 { return Err(HandleError{err: "Got an accept_channel message at a strange time", msg: None}); } if msg.dust_limit_satoshis > 21000000 * 100000000 { return Err(HandleError{err: "Peer never wants payout outputs?", msg: None}); } if msg.max_htlc_value_in_flight_msat > self.channel_value_satoshis * 1000 { return Err(HandleError{err: "Bogus max_htlc_value_in_flight_satoshis", msg: None}); } if msg.channel_reserve_satoshis > self.channel_value_satoshis { return Err(HandleError{err: "Bogus channel_reserve_satoshis", msg: None}); } if msg.htlc_minimum_msat >= (self.channel_value_satoshis - msg.channel_reserve_satoshis) * 1000 { return Err(HandleError{err: "Minimum htlc value is full channel value", msg: None}); } //TODO do something with minimum_depth if msg.to_self_delay > MAX_LOCAL_BREAKDOWN_TIMEOUT { return Err(HandleError{err: "They wanted our payments to be delayed by a needlessly long period", msg: None}); } if msg.max_accepted_htlcs < 1 { return Err(HandleError{err: "0 max_accpted_htlcs makes for a useless channel", msg: None}); } self.channel_monitor.set_their_htlc_base_key(&msg.htlc_basepoint); self.their_dust_limit_satoshis = msg.dust_limit_satoshis; self.their_max_htlc_value_in_flight_msat = msg.max_htlc_value_in_flight_msat; self.their_channel_reserve_satoshis = msg.channel_reserve_satoshis; 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.their_funding_pubkey = msg.funding_pubkey; self.their_revocation_basepoint = msg.revocation_basepoint; self.their_payment_basepoint = msg.payment_basepoint; self.their_delayed_payment_basepoint = msg.delayed_payment_basepoint; self.their_htlc_basepoint = msg.htlc_basepoint; self.their_cur_commitment_point = msg.first_per_commitment_point; let obscure_factor = self.get_commitment_transaction_number_obscure_factor(); self.channel_monitor.set_commitment_obscure_factor(obscure_factor); self.channel_state = ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32; Ok(()) } fn funding_created_signature(&mut self, sig: &Signature) -> Result<(Transaction, Signature), HandleError> { let funding_script = self.get_funding_redeemscript(); let remote_keys = self.build_remote_transaction_keys()?; let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false)?.0; let remote_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&remote_initial_commitment_tx).sighash_all(&remote_initial_commitment_tx, 0, &funding_script, self.channel_value_satoshis)[..])); let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?; let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false)?.0; let local_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx, 0, &funding_script, self.channel_value_satoshis)[..])); // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish. secp_call!(self.secp_ctx.verify(&local_sighash, &sig, &self.their_funding_pubkey)); // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish. Ok((remote_initial_commitment_tx, secp_call!(self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key)))) } pub fn funding_created(&mut self, msg: &msgs::FundingCreated) -> Result { if self.channel_outbound { return Err(HandleError{err: "Received funding_created for an outbound channel?", msg: None}); } if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) { return Err(HandleError{err: "Received funding_created after we got the channel!", msg: None}); } if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 1 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 { panic!("Should not have advanced channel commitment tx numbers prior to funding_created"); } self.channel_monitor.set_funding_info(msg.funding_txid, msg.funding_output_index); let (remote_initial_commitment_tx, our_signature) = match self.funding_created_signature(&msg.signature) { Ok((remote_initial_commitment_tx, sig)) => (remote_initial_commitment_tx, sig), Err(e) => { self.channel_monitor.unset_funding_info(); return Err(e); } }; // Now that we're past error-generating stuff, update our local state: //TODO: Determine which tx index in remote_initial_commitment_transaction's outputs //represent a revokeable script! self.channel_monitor.provide_tx_info(&remote_initial_commitment_tx, 0, Vec::new()); self.channel_state = ChannelState::FundingSent as u32; let funding_txo = self.channel_monitor.get_funding_txo().unwrap(); self.channel_id = funding_txo.0.into_be() ^ Uint256::from_u64(funding_txo.1 as u64).unwrap(); //TODO: or le? Ok(msgs::FundingSigned { channel_id: self.channel_id, signature: our_signature }) } /// Handles a funding_signed message from the remote end. /// If this call is successful, broadcast the funding transaction (and not before!) pub fn funding_signed(&mut self, msg: &msgs::FundingSigned) -> Result<(), HandleError> { if !self.channel_outbound { return Err(HandleError{err: "Received funding_signed for an inbound channel?", msg: None}); } if self.channel_state != ChannelState::FundingCreated as u32 { return Err(HandleError{err: "Received funding_signed in strange state!", msg: None}); } if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 1 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 { panic!("Should not have advanced channel commitment tx numbers prior to funding_created"); } let funding_script = self.get_funding_redeemscript(); let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?; let local_initial_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false)?.0; let local_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&local_initial_commitment_tx).sighash_all(&local_initial_commitment_tx, 0, &funding_script, self.channel_value_satoshis)[..])); // They sign the "local" commitment transaction, allowing us to broadcast the tx if we wish. secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey)); self.channel_state = ChannelState::FundingSent as u32; Ok(()) } pub fn funding_locked(&mut self, msg: &msgs::FundingLocked) -> Result<(), HandleError> { if self.channel_state == ChannelState::FundingSent as u32 { self.channel_state |= ChannelState::TheirFundingLocked as u32; } else if self.channel_state == (ChannelState::FundingSent as u32 | ChannelState::OurFundingLocked as u32) { self.channel_state = ChannelState::ChannelFunded as u32; } else if self.channel_state < ChannelState::FundingSent as u32 { return Err(HandleError{err: "Peer sent a funding_locked before we'd even been told the funding txid", msg: None}); } //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, //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be //a protocol oversight, but I assume I'm just missing something. if self.their_cur_commitment_point != msg.next_per_commitment_point { return Err(HandleError{err: "Non-duplicate next_per_commitment_point in funding_locked", msg: None}); } self.their_cur_commitment_point = msg.next_per_commitment_point; Ok(()) } /// Returns (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) fn get_pending_htlc_stats(&self) -> (u32, u32, u64, u64) { let mut inbound_htlc_count: u32 = 0; let mut outbound_htlc_count: u32 = 0; let mut htlc_outbound_value_msat = 0; let mut htlc_inbound_value_msat = 0; for ref htlc in self.pending_htlcs.iter() { if !htlc.outbound { inbound_htlc_count += 1; htlc_inbound_value_msat += htlc.amount_msat; } else { outbound_htlc_count += 1; htlc_outbound_value_msat += htlc.amount_msat; } } (inbound_htlc_count, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) } pub fn update_add_htlc(&mut self, msg: &msgs::UpdateAddHTLC, pending_forward_state: PendingForwardHTLCInfo) -> Result<(), HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None}); } if msg.amount_msat > self.channel_value_satoshis * 1000 { return Err(HandleError{err: "Remote side tried to send more than the total value of the channel", msg: None}); } if msg.amount_msat < self.our_htlc_minimum_msat { return Err(HandleError{err: "Remote side tried to send less than our minimum HTLC value", msg: None}); } let (inbound_htlc_count, _, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(); if inbound_htlc_count + 1 > OUR_MAX_HTLCS as u32 { return Err(HandleError{err: "Remote tried to push more than our max accepted HTLCs", msg: None}); } //TODO: Spec is unclear if this is per-direction or in total (I assume per direction): // Check our_max_htlc_value_in_flight_msat if htlc_inbound_value_msat + msg.amount_msat > Channel::get_our_max_htlc_value_in_flight_msat(self.channel_value_satoshis) { return Err(HandleError{err: "Remote HTLC add would put them over their max HTLC value in flight", msg: None}); } // Check our_channel_reserve_satoshis (we're getting paid, so they have to at least meet // the reserve_satoshis we told them to always have as direct payment so that they lose // something if we punish them for broadcasting an old state). if htlc_inbound_value_msat + htlc_outbound_value_msat + msg.amount_msat + self.value_to_self_msat > (self.channel_value_satoshis - Channel::get_our_channel_reserve_satoshis(self.channel_value_satoshis)) * 1000 { return Err(HandleError{err: "Remote HTLC add would put them over their reserve value", msg: None}); } if self.next_remote_htlc_id != msg.htlc_id { return Err(HandleError{err: "Remote skipped HTLC ID", msg: None}); } if msg.cltv_expiry >= 500000000 { return Err(HandleError{err: "Remote provided CLTV expiry in seconds instead of block height", msg: None}); } //TODO: Check msg.cltv_expiry further? Do this in channel manager? // Now update local state: self.next_remote_htlc_id += 1; self.pending_htlcs.push(HTLCOutput { outbound: false, htlc_id: msg.htlc_id, amount_msat: msg.amount_msat, payment_hash: msg.payment_hash, cltv_expiry: msg.cltv_expiry, state: HTLCState::RemoteAnnounced, pending_forward_state: Some(pending_forward_state), }); Ok(()) } /// Removes an outbound HTLC which has been commitment_signed by the remote end fn remove_outbound_htlc(&mut self, htlc_id: u64, check_preimage: Option<[u8; 32]>) -> Result { let mut found_idx = None; for (idx, ref htlc) in self.pending_htlcs.iter().enumerate() { if htlc.outbound && htlc.htlc_id == htlc_id { match check_preimage { None => {}, Some(payment_hash) => if payment_hash != htlc.payment_hash { return Err(HandleError{err: "Remote tried to fulfill HTLC with an incorrect preimage", msg: None}); } }; found_idx = Some(idx); break; } } match found_idx { None => Err(HandleError{err: "Remote tried to fulfill/fail an HTLC we couldn't find", msg: None}), Some(idx) => { Ok(self.pending_htlcs.swap_remove(idx)) } } } /// Used to fulfill holding_cell_htlcs when we get a remote ack (or implicitly get it by them /// fulfilling or failing the last pending HTLC) fn free_holding_cell_htlcs(&mut self) -> Result, msgs::CommitmentSigned)>, HandleError> { if self.holding_cell_htlcs.len() != 0 { let mut new_htlcs = self.holding_cell_htlcs.split_off(0); let mut update_add_msgs = Vec::with_capacity(new_htlcs.len()); let mut err = None; for new_htlc in new_htlcs.drain(..) { // Note that this *can* fail, though it should be due to rather-rare conditions on // fee races with adding too many outputs which push our total payments just over // the limit. In case its less rare than I anticipate, we may want to revisit // handling this case better and maybe fufilling some of the HTLCs while attempting // to rebalance channels. if self.holding_cell_htlcs.len() != 0 { self.holding_cell_htlcs.push(new_htlc); } else { match self.send_htlc(new_htlc.amount_msat, new_htlc.payment_hash, new_htlc.cltv_expiry, new_htlc.onion_routing_packet.clone()) { Ok(update_add_msg_option) => update_add_msgs.push(update_add_msg_option.unwrap()), Err(e) => { self.holding_cell_htlcs.push(new_htlc); err = Some(e); } } } } //TODO: Need to examine the type of err - if its a fee issue or similar we may want to //fail it back the route, if its a temporary issue we can ignore it... if update_add_msgs.len() > 0 { Ok(Some((update_add_msgs, self.send_commitment()?))) } else { Err(err.unwrap()) } } else { Ok(None) } } /// Checks if there are any LocalAnnounced HTLCs remaining and sets /// ChannelState::AwaitingRemoteRevoke accordingly, possibly calling free_holding_cell_htlcs. fn check_and_free_holding_cell_htlcs(&mut self) -> Result, msgs::CommitmentSigned)>, HandleError> { if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) { for htlc in self.pending_htlcs.iter() { if htlc.state == HTLCState::LocalAnnounced { return Ok(None); } } self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32); self.free_holding_cell_htlcs() } else { Ok(None) } } pub fn update_fulfill_htlc(&mut self, msg: &msgs::UpdateFulfillHTLC) -> Result, msgs::CommitmentSigned)>, HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None}); } let mut sha = Sha256::new(); sha.input(&msg.payment_preimage); let mut payment_hash = [0; 32]; sha.result(&mut payment_hash); match self.remove_outbound_htlc(msg.htlc_id, Some(payment_hash)) { Err(e) => return Err(e), Ok(htlc) => { //TODO: Double-check that we didn't exceed some limits (or value_to_self went //negative here?) self.value_to_self_msat -= htlc.amount_msat; } } self.check_and_free_holding_cell_htlcs() } pub fn update_fail_htlc(&mut self, msg: &msgs::UpdateFailHTLC) -> Result<([u8; 32], Option<(Vec, msgs::CommitmentSigned)>), HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None}); } let payment_hash = match self.remove_outbound_htlc(msg.htlc_id, None) { Err(e) => return Err(e), Ok(htlc) => { //TODO: Double-check that we didn't exceed some limits (or value_to_self went //negative here?) htlc.payment_hash } }; let holding_cell_freedom = self.check_and_free_holding_cell_htlcs()?; Ok((payment_hash, holding_cell_freedom)) } pub fn update_fail_malformed_htlc(&mut self, msg: &msgs::UpdateFailMalformedHTLC) -> Result<([u8; 32], Option<(Vec, msgs::CommitmentSigned)>), HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got add HTLC message when channel was not in an operational state", msg: None}); } let payment_hash = match self.remove_outbound_htlc(msg.htlc_id, None) { Err(e) => return Err(e), Ok(htlc) => { //TODO: Double-check that we didn't exceed some limits (or value_to_self went //negative here?) htlc.payment_hash } }; let holding_cell_freedom = self.check_and_free_holding_cell_htlcs()?; Ok((payment_hash, holding_cell_freedom)) } pub fn commitment_signed(&mut self, msg: &msgs::CommitmentSigned) -> Result<(msgs::RevokeAndACK, Vec), HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got commitment signed message when channel was not in an operational state", msg: None}); } let funding_script = self.get_funding_redeemscript(); let local_keys = self.build_local_transaction_keys(self.cur_local_commitment_transaction_number)?; let local_commitment_tx = self.build_commitment_transaction(self.cur_local_commitment_transaction_number, &local_keys, true, false)?; let local_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&local_commitment_tx.0).sighash_all(&local_commitment_tx.0, 0, &funding_script, self.channel_value_satoshis)[..])); secp_call!(self.secp_ctx.verify(&local_sighash, &msg.signature, &self.their_funding_pubkey)); if msg.htlc_signatures.len() != local_commitment_tx.1.len() { return Err(HandleError{err: "Got wrong number of HTLC signatures from remote", msg: None}); } for (idx, ref htlc) in local_commitment_tx.1.iter().enumerate() { let htlc_tx = self.build_htlc_transaction(&local_commitment_tx.0.txid(), htlc, true, &local_keys)?; let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &local_keys, htlc.offered); let htlc_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx, 0, &htlc_redeemscript, htlc.amount_msat / 1000)[..])); secp_call!(self.secp_ctx.verify(&htlc_sighash, &msg.htlc_signatures[idx], &local_keys.b_htlc_key)); } let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &self.build_local_commitment_secret(self.cur_local_commitment_transaction_number - 1)?).unwrap(); let per_commitment_secret = chan_utils::build_commitment_secret(self.local_keys.commitment_seed, self.cur_local_commitment_transaction_number); //TODO: Store htlc keys in our channel_watcher // Update state now that we've passed all the can-fail calls... let mut to_forward_infos = Vec::new(); for ref mut htlc in self.pending_htlcs.iter_mut() { if htlc.state == HTLCState::RemoteAnnounced { htlc.state = HTLCState::Committed; to_forward_infos.push(htlc.pending_forward_state.take().unwrap()); } } self.cur_local_commitment_transaction_number -= 1; Ok((msgs::RevokeAndACK { channel_id: self.channel_id, per_commitment_secret: per_commitment_secret, next_per_commitment_point: next_per_commitment_point, }, to_forward_infos)) } /// Handles receiving a remote's revoke_and_ack. Note that we may return a new /// commitment_signed message here in case we had pending outbound HTLCs to add which were /// waiting on this revoke_and_ack. The generation of this new commitment_signed may also fail, /// generating an appropriate error *after* the channel state has been updated based on the /// revoke_and_ack message. pub fn revoke_and_ack(&mut self, msg: &msgs::RevokeAndACK) -> Result, msgs::CommitmentSigned)>, HandleError> { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Got revoke/ACK message when channel was not in an operational state", msg: None}); } if PublicKey::from_secret_key(&self.secp_ctx, &get_key!(&self.secp_ctx, &msg.per_commitment_secret)).unwrap() != self.their_cur_commitment_point { return Err(HandleError{err: "Got a revoke commitment secret which didn't correspond to their current pubkey", msg: None}); } self.channel_monitor.provide_secret(self.cur_remote_commitment_transaction_number, msg.per_commitment_secret)?; // Update state now that we've passed all the can-fail calls... // (note that we may still fail to generate the new commitment_signed message, but that's // OK, we step the channel here and *then* if the new generation fails we can fail the // channel based on that, but stepping stuff here should be safe either way. self.channel_state &= !(ChannelState::AwaitingRemoteRevoke as u32); self.their_cur_commitment_point = msg.next_per_commitment_point; self.cur_remote_commitment_transaction_number -= 1; for htlc in self.pending_htlcs.iter_mut() { if htlc.state == HTLCState::LocalAnnounced { htlc.state = HTLCState::Committed; } } self.free_holding_cell_htlcs() } pub fn update_fee(&mut self, fee_estimator: &FeeEstimator, msg: &msgs::UpdateFee) -> Result<(), HandleError> { if self.channel_outbound { return Err(HandleError{err: "Non-funding remote tried to update channel fee", msg: None}); } Channel::check_remote_fee(fee_estimator, msg.feerate_per_kw).unwrap(); self.feerate_per_kw = msg.feerate_per_kw as u64; Ok(()) } // Public utilities: pub fn channel_id(&self) -> Uint256 { self.channel_id } /// Gets the "user_id" value passed into the construction of this channel. It has no special /// meaning and exists only to allow users to have a persistent identifier of a channel. pub fn get_user_id(&self) -> u64 { self.user_id } /// Guaranteed to be Some after both FundingLocked messages have been exchanged (and, thus, /// is_usable() returns true). pub fn get_short_channel_id(&self) -> Option { self.short_channel_id } /// Returns the funding_txo we either got from our peer, or were given by /// get_outbound_funding_created. pub fn get_funding_txo(&self) -> Option<(Sha256dHash, u16)> { self.channel_monitor.get_funding_txo() } pub fn get_their_node_id(&self) -> PublicKey { self.their_node_id } pub fn get_our_htlc_minimum_msat(&self) -> u64 { self.our_htlc_minimum_msat } pub fn get_value_satoshis(&self) -> u64 { self.channel_value_satoshis } pub fn get_channel_update_count(&mut self) -> u32 { self.channel_update_count += 1; //TODO: This should be base on updates, not updates *sent* self.channel_update_count } /// Gets the fee we'd want to charge for adding an HTLC output to this Channel pub fn get_our_fee_base_msat(&self, fee_estimator: &FeeEstimator) -> u32 { // For lack of a better metric, we calculate what it would cost to consolidate the new HTLC // output value back into a transaction with the regular channel output: // the fee cost of the HTLC-Success/HTLC-Timeout transaction: let mut res = self.feerate_per_kw * cmp::max(HTLC_TIMEOUT_TX_WEIGHT, HTLC_SUCCESS_TX_WEIGHT); if self.channel_outbound { // + the marginal fee increase cost to us in the commitment transaction: res += self.feerate_per_kw * COMMITMENT_TX_WEIGHT_PER_HTLC; } // + the marginal cost of an input which spends the HTLC-Success/HTLC-Timeout output: res += fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Normal) * SPENDING_INPUT_FOR_A_OUTPUT_WEIGHT * 250; res as u32 } pub fn channel_monitor(&self) -> ChannelMonitor { if self.channel_state < ChannelState::FundingCreated as u32 { panic!("Can't get a channel monitor until funding has been created"); } self.channel_monitor.clone() } /// 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) } /// Returns true if this channel is currently available for use. This is a superset of /// is_usable() and considers things like the channel being temporarily disabled. pub fn is_live(&self) -> bool { self.is_usable() } /// 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 { 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 { 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; //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?"); } self.funding_tx_confirmed_in = header.bitcoin_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, //they can by sending two revoke_and_acks back-to-back, but not really). This appears to be //a protocol oversight, but I assume I'm just missing something. let next_per_commitment_secret = match self.build_local_commitment_secret(self.cur_local_commitment_transaction_number) { Ok(secret) => secret, Err(_) => return None }; let next_per_commitment_point = PublicKey::from_secret_key(&self.secp_ctx, &next_per_commitment_secret).unwrap(); return Some(msgs::FundingLocked { channel_id: self.channel_id, next_per_commitment_point: next_per_commitment_point, }); } } } if self.channel_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; self.short_channel_id = Some(((height as u64) << (5*8)) | ((*index_in_block as u64) << (2*8)) | ((self.channel_monitor.get_funding_txo().unwrap().1 as u64) << (2*8))); } } } None } /// Called by channelmanager based on chain blocks being disconnected. /// Returns true if we need to close the channel now due to funding transaction /// unconfirmation/reorg. pub fn block_disconnected(&mut self, header: &BlockHeader) -> bool { if self.funding_tx_confirmations > 0 { self.funding_tx_confirmations -= 1; if self.funding_tx_confirmations == UNCONF_THRESHOLD as u64 { return true; } } if header.bitcoin_hash() == self.funding_tx_confirmed_in { self.funding_tx_confirmations = CONF_TARGET as u64 - 1; } false } // Methods to get unprompted messages to send to the remote end (or where we already returned // something in the handler for the message that prompted this message): pub fn get_open_channel(&self, chain_hash: Sha256dHash, fee_estimator: &FeeEstimator) -> Result { if !self.channel_outbound { panic!("Tried to open a channel for an inbound channel?"); } if self.channel_state != ChannelState::OurInitSent as u32 { return Err(HandleError{err: "Cannot generate an open_channel after we've moved forward", msg: None}); } if self.cur_local_commitment_transaction_number != (1 << 48) - 1 { panic!("Tried to send an open_channel for a channel that has already advanced"); } let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number)?; Ok(msgs::OpenChannel { chain_hash: chain_hash, temporary_channel_id: self.channel_id, funding_satoshis: self.channel_value_satoshis, push_msat: 0, //TODO: Something about feerate? dust_limit_satoshis: self.our_dust_limit_satoshis, 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, feerate_per_kw: fee_estimator.get_est_sat_per_vbyte(ConfirmationTarget::Background) as u32 * 250, 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).unwrap(), revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(), payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(), delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(), htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(), first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(), channel_flags: if self.announce_publicly {1} else {0}, shutdown_scriptpubkey: None, }) } pub fn get_accept_channel(&self) -> Result { if self.channel_outbound { panic!("Tried to send accept_channel for an outbound channel?"); } if self.channel_state != (ChannelState::OurInitSent as u32) | (ChannelState::TheirInitSent as u32) { panic!("Tried to send accept_channel after channel had moved forward"); } if self.cur_local_commitment_transaction_number != (1 << 48) - 1 { panic!("Tried to send an accept_channel for a channel that has already advanced"); } let local_commitment_secret = self.build_local_commitment_secret(self.cur_local_commitment_transaction_number)?; Ok(msgs::AcceptChannel { temporary_channel_id: self.channel_id, dust_limit_satoshis: self.our_dust_limit_satoshis, 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: CONF_TARGET, 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).unwrap(), revocation_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.revocation_base_key).unwrap(), payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.payment_base_key).unwrap(), delayed_payment_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.delayed_payment_base_key).unwrap(), htlc_basepoint: PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.htlc_base_key).unwrap(), first_per_commitment_point: PublicKey::from_secret_key(&self.secp_ctx, &local_commitment_secret).unwrap(), shutdown_scriptpubkey: None, }) } fn get_outbound_funding_created_signature(&mut self) -> Result { let funding_script = self.get_funding_redeemscript(); let remote_keys = self.build_remote_transaction_keys()?; let remote_initial_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, false)?.0; let remote_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&remote_initial_commitment_tx).sighash_all(&remote_initial_commitment_tx, 0, &funding_script, self.channel_value_satoshis)[..])); // We sign the "remote" commitment transaction, allowing them to broadcast the tx if they wish. Ok(secp_call!(self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key))) } /// Updates channel state with knowledge of the funding transaction's txid/index, and generates /// a funding_created message for the remote peer. /// Panics if called at some time other than immediately after initial handshake, if called twice, /// or if called on an inbound channel. /// Note that channel_id changes during this call! /// Do NOT broadcast the funding transaction until after a successful funding_signed call! pub fn get_outbound_funding_created(&mut self, funding_txid: Sha256dHash, funding_output_index: u16) -> Result { if !self.channel_outbound { panic!("Tried to create outbound funding_created message on an inbound channel!"); } if self.channel_state != (ChannelState::OurInitSent as u32 | ChannelState::TheirInitSent as u32) { panic!("Tried to get a funding_created messsage at a time other than immediately after initial handshake completion (or tried to get funding_created twice)"); } if self.channel_monitor.get_min_seen_secret() != (1 << 48) || self.cur_remote_commitment_transaction_number != (1 << 48) - 1 || self.cur_local_commitment_transaction_number != (1 << 48) - 1 { panic!("Should not have advanced channel commitment tx numbers prior to funding_created"); } self.channel_monitor.set_funding_info(funding_txid, funding_output_index); let our_signature = match self.get_outbound_funding_created_signature() { Ok(sig) => sig, Err(e) => { self.channel_monitor.unset_funding_info(); return Err(e); } }; let temporary_channel_id = self.channel_id; // Now that we're past error-generating stuff, update our local state: self.channel_state = ChannelState::FundingCreated as u32; let funding_txo = self.channel_monitor.get_funding_txo().unwrap(); self.channel_id = funding_txo.0.into_be() ^ Uint256::from_u64(funding_txo.1 as u64).unwrap(); //TODO: or le? Ok(msgs::FundingCreated { temporary_channel_id: temporary_channel_id, funding_txid: funding_txid, funding_output_index: funding_output_index, signature: our_signature }) } /// Gets an UnsignedChannelAnnouncement, as well as a signature covering it using our /// 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. 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 { return Err(HandleError{err: "Cannot get a ChannelAnnouncement until the channel funding has been locked", msg: None}); } let were_node_one = our_node_id.serialize()[..] < self.their_node_id.serialize()[..]; let our_bitcoin_key = PublicKey::from_secret_key(&self.secp_ctx, &self.local_keys.funding_key).unwrap(); let msg = msgs::UnsignedChannelAnnouncement { features: msgs::GlobalFeatures::new(), chain_hash: chain_hash, short_channel_id: self.get_short_channel_id().unwrap(), node_id_1: if were_node_one { our_node_id } else { self.get_their_node_id() }, node_id_2: if were_node_one { self.get_their_node_id() } else { our_node_id }, bitcoin_key_1: if were_node_one { our_bitcoin_key } else { self.their_funding_pubkey }, bitcoin_key_2: if were_node_one { self.their_funding_pubkey } else { our_bitcoin_key }, }; let msghash = Message::from_slice(&Sha256dHash::from_data(&msg.encode()[..])[..]).unwrap(); let sig = secp_call!(self.secp_ctx.sign(&msghash, &self.local_keys.funding_key)); Ok((msg, sig)) } // Send stuff to our remote peers: /// Adds a pending outbound HTLC to this channel, note that you probably want /// send_htlc_and_commit instead cause you'll want both messages at once. /// This returns an option instead of a pure UpdateAddHTLC as we may be in a state where we are /// 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, 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 amount_msat > self.channel_value_satoshis * 1000 { return Err(HandleError{err: "Cannot send more than the total value of the channel", msg: None}); } if amount_msat < self.their_htlc_minimum_msat { return Err(HandleError{err: "Cannot send less than their minimum HTLC value", msg: None}); } let (_, outbound_htlc_count, htlc_outbound_value_msat, htlc_inbound_value_msat) = self.get_pending_htlc_stats(); if outbound_htlc_count + 1 > self.their_max_accepted_htlcs as u32 { return Err(HandleError{err: "Cannot push more than their max accepted HTLCs", msg: None}); } //TODO: Spec is unclear if this is per-direction or in total (I assume per direction): // Check their_max_htlc_value_in_flight_msat if htlc_outbound_value_msat + amount_msat > self.their_max_htlc_value_in_flight_msat { return Err(HandleError{err: "Cannot send value that would put us over our max HTLC value in flight", msg: None}); } // Check their_channel_reserve_satoshis: if htlc_inbound_value_msat + htlc_outbound_value_msat + amount_msat + (self.channel_value_satoshis * 1000 - self.value_to_self_msat) > (self.channel_value_satoshis - self.their_channel_reserve_satoshis) * 1000 { return Err(HandleError{err: "Cannot send value that would put us over our reserve value", msg: None}); } //TODO: Check cltv_expiry? Do this in channel manager? // Now update local state: if (self.channel_state & (ChannelState::AwaitingRemoteRevoke as u32)) == (ChannelState::AwaitingRemoteRevoke as u32) { //TODO: Check the limits *including* other pending holding cell HTLCs! self.holding_cell_htlcs.push(HTLCOutputAwaitingACK { amount_msat: amount_msat, payment_hash: payment_hash, cltv_expiry: cltv_expiry, onion_routing_packet: onion_routing_packet, time_created: Instant::now(), }); return Ok(None); } self.pending_htlcs.push(HTLCOutput { outbound: true, htlc_id: self.next_local_htlc_id, amount_msat: amount_msat, payment_hash: payment_hash.clone(), cltv_expiry: cltv_expiry, state: HTLCState::LocalAnnounced, pending_forward_state: None }); let res = msgs::UpdateAddHTLC { channel_id: self.channel_id, htlc_id: self.next_local_htlc_id, amount_msat: amount_msat, payment_hash: payment_hash, cltv_expiry: cltv_expiry, onion_routing_packet: onion_routing_packet, }; self.next_local_htlc_id += 1; Ok(Some(res)) } /// Creates a signed commitment transaction to send to the remote peer. pub fn send_commitment(&mut self) -> Result { if (self.channel_state & (ChannelState::ChannelFunded as u32)) != (ChannelState::ChannelFunded as u32) { return Err(HandleError{err: "Cannot create commitment tx until channel is fully established", msg: None}); } let funding_script = self.get_funding_redeemscript(); let remote_keys = self.build_remote_transaction_keys()?; let remote_commitment_tx = self.build_commitment_transaction(self.cur_remote_commitment_transaction_number, &remote_keys, false, true)?; let remote_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&remote_commitment_tx.0).sighash_all(&remote_commitment_tx.0, 0, &funding_script, self.channel_value_satoshis)[..])); let our_sig = secp_call!(self.secp_ctx.sign(&remote_sighash, &self.local_keys.funding_key)); let mut htlc_sigs = Vec::new(); for ref htlc in remote_commitment_tx.1.iter() { let htlc_tx = self.build_htlc_transaction(&remote_commitment_tx.0.txid(), htlc, false, &remote_keys)?; let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &remote_keys, htlc.offered); let htlc_sighash = secp_call!(Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx, 0, &htlc_redeemscript, htlc.amount_msat / 1000)[..])); let our_htlc_key = secp_call!(chan_utils::derive_private_key(&self.secp_ctx, &remote_keys.per_commitment_point, &self.local_keys.htlc_base_key)); htlc_sigs.push(secp_call!(self.secp_ctx.sign(&htlc_sighash, &our_htlc_key))); } // Update state now that we've passed all the can-fail calls... self.channel_state |= ChannelState::AwaitingRemoteRevoke as u32; Ok(msgs::CommitmentSigned { channel_id: self.channel_id, signature: our_sig, htlc_signatures: htlc_sigs, }) } /// Adds a pending outbound HTLC to this channel, and creates a signed commitment transaction /// to send to the remote peer in one go. /// Shorthand for calling send_htlc() followed by send_commitment(), see docs on those for /// more info. pub fn send_htlc_and_commit(&mut self, amount_msat: u64, payment_hash: [u8; 32], cltv_expiry: u32, onion_routing_packet: msgs::OnionPacket) -> Result, HandleError> { match self.send_htlc(amount_msat, payment_hash, cltv_expiry, onion_routing_packet)? { Some(update_add_htlc) => Ok(Some((update_add_htlc, self.send_commitment()?))), None => Ok(None) } } } #[cfg(test)] mod tests { use bitcoin::util::misc::hex_bytes; use bitcoin::util::hash::Sha256dHash; use bitcoin::util::bip143; use bitcoin::network::serialize::serialize; use bitcoin::blockdata::transaction::Transaction; use ln::channel::{Channel,HTLCOutput,HTLCState,HTLCOutputInCommitment,TxCreationKeys}; use ln::chan_utils; use chain::chaininterface::{FeeEstimator,ConfirmationTarget}; use secp256k1::{Secp256k1,Message,Signature}; use secp256k1::key::{SecretKey,PublicKey}; use crypto::sha2::Sha256; use crypto::digest::Digest; struct TestFeeEstimator { fee_est: u64 } impl FeeEstimator for TestFeeEstimator { fn get_est_sat_per_vbyte(&self, _: ConfirmationTarget) -> u64 { self.fee_est } } #[test] fn outbound_commitment_test() { // Test vectors from BOLT 3 Appendix C: let feeest = TestFeeEstimator{fee_est: 15000/250}; let mut chan = Channel::new_outbound(&feeest, PublicKey::new(), 10000000, false, 42); // Nothing uses their network key in this test chan.their_to_self_delay = 144; chan.our_dust_limit_satoshis = 546; let secp_ctx = Secp256k1::new(); chan.local_keys.funding_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("30ff4956bbdd3222d44cc5e8a1261dab1e07957bdac5ae88fe3261ef321f3749").unwrap()[..]).unwrap(); assert_eq!(PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.funding_key).unwrap().serialize()[..], hex_bytes("023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb").unwrap()[..]); chan.local_keys.payment_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(); chan.local_keys.delayed_payment_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("3333333333333333333333333333333333333333333333333333333333333333").unwrap()[..]).unwrap(); chan.local_keys.htlc_base_key = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(); // chan.local_keys.commitment_seed isn't derived in the test vectors :( chan.channel_monitor.set_funding_info(Sha256dHash::from_hex("8984484a580b825b9972d7adb15050b3ab624ccd731946b3eeddb92f4e7ef6be").unwrap(), 0); chan.their_payment_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap(); assert_eq!(chan.their_payment_basepoint.serialize()[..], hex_bytes("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]); chan.their_funding_pubkey = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("1552dfba4f6cf29a62a0af13c8d6981d36d0ef8d61ba10fb0fe90da7634d7e13").unwrap()[..]).unwrap()).unwrap(); assert_eq!(chan.their_funding_pubkey.serialize()[..], hex_bytes("030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1").unwrap()[..]); chan.their_htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex_bytes("4444444444444444444444444444444444444444444444444444444444444444").unwrap()[..]).unwrap()).unwrap(); assert_eq!(chan.their_htlc_basepoint.serialize()[..], hex_bytes("032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991").unwrap()[..]); chan.their_revocation_basepoint = PublicKey::from_slice(&secp_ctx, &hex_bytes("02466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f27").unwrap()[..]).unwrap(); // We can't just use build_local_transaction_keys here as the per_commitment_secret is not // derived from a commitment_seed, so instead we copy it here and call // build_commitment_transaction. let delayed_payment_base = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.delayed_payment_base_key).unwrap(); let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap(); let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap(); let htlc_basepoint = PublicKey::from_secret_key(&secp_ctx, &chan.local_keys.htlc_base_key).unwrap(); let keys = TxCreationKeys::new(&secp_ctx, &per_commitment_point, &delayed_payment_base, &htlc_basepoint, &chan.their_revocation_basepoint, &chan.their_payment_basepoint, &chan.their_htlc_basepoint).unwrap(); let mut unsigned_tx: (Transaction, Vec); macro_rules! test_commitment { ( $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr) => { unsigned_tx = chan.build_commitment_transaction(42, &keys, true, false).unwrap(); let their_signature = Signature::from_der(&secp_ctx, &hex_bytes($their_sig_hex).unwrap()[..]).unwrap(); let sighash = Message::from_slice(&bip143::SighashComponents::new(&unsigned_tx.0).sighash_all(&unsigned_tx.0, 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(); assert_eq!(serialize(&unsigned_tx.0).unwrap()[..], hex_bytes($tx_hex).unwrap()[..]); }; } macro_rules! test_htlc_output { ( $htlc_idx: expr, $their_sig_hex: expr, $our_sig_hex: expr, $tx_hex: expr ) => { let remote_signature = Signature::from_der(&secp_ctx, &hex_bytes($their_sig_hex).unwrap()[..]).unwrap(); let ref htlc = unsigned_tx.1[$htlc_idx]; let mut htlc_tx = chan.build_htlc_transaction(&unsigned_tx.0.txid(), &htlc, true, &keys).unwrap(); let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&htlc, &keys, htlc.offered); let htlc_sighash = Message::from_slice(&bip143::SighashComponents::new(&htlc_tx).sighash_all(&htlc_tx, 0, &htlc_redeemscript, htlc.amount_msat / 1000)[..]).unwrap(); secp_ctx.verify(&htlc_sighash, &remote_signature, &keys.b_htlc_key).unwrap(); let mut preimage: Option<[u8; 32]> = None; if !htlc.offered { for i in 0..5 { let mut sha = Sha256::new(); sha.input(&[i; 32]); let mut out = [0; 32]; sha.result(&mut out); if out == htlc.payment_hash { preimage = Some([i; 32]); } } assert!(preimage.is_some()); } chan.sign_htlc_transaction(&mut htlc_tx, &remote_signature, &preimage, &htlc, &keys).unwrap(); assert_eq!(serialize(&htlc_tx).unwrap()[..], hex_bytes($tx_hex).unwrap()[..]); }; } { // simple commitment tx with no HTLCs chan.value_to_self_msat = 7000000000; test_commitment!("3045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c0", "3044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c3836939", "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8002c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de84311054a56a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400473044022051b75c73198c6deee1a875871c3961832909acd297c6b908d59e3319e5185a46022055c419379c5051a78d00dbbce11b5b664a0c22815fbcc6fcef6b1937c383693901483045022100f51d2e566a70ba740fc5d8c0f07b9b93d2ed741c3c0860c613173de7d39e7968022041376d520e9c0e1ad52248ddf4b22e12be8763007df977253ef45a4ca3bdb7c001475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220"); } chan.pending_htlcs.push({ let mut out = HTLCOutput{ htlc_id: 0, outbound: false, amount_msat: 1000000, cltv_expiry: 500, payment_hash: [0; 32], state: HTLCState::Committed, pending_forward_state: None, }; let mut sha = Sha256::new(); sha.input(&hex_bytes("0000000000000000000000000000000000000000000000000000000000000000").unwrap()); sha.result(&mut out.payment_hash); out }); chan.pending_htlcs.push({ let mut out = HTLCOutput{ htlc_id: 1, outbound: false, amount_msat: 2000000, cltv_expiry: 501, payment_hash: [0; 32], state: HTLCState::Committed, pending_forward_state: None, }; let mut sha = Sha256::new(); sha.input(&hex_bytes("0101010101010101010101010101010101010101010101010101010101010101").unwrap()); sha.result(&mut out.payment_hash); out }); chan.pending_htlcs.push({ let mut out = HTLCOutput{ htlc_id: 2, outbound: true, amount_msat: 2000000, cltv_expiry: 502, payment_hash: [0; 32], state: HTLCState::Committed, pending_forward_state: None, }; let mut sha = Sha256::new(); sha.input(&hex_bytes("0202020202020202020202020202020202020202020202020202020202020202").unwrap()); sha.result(&mut out.payment_hash); out }); chan.pending_htlcs.push({ let mut out = HTLCOutput{ htlc_id: 3, outbound: true, amount_msat: 3000000, cltv_expiry: 503, payment_hash: [0; 32], state: HTLCState::Committed, pending_forward_state: None, }; let mut sha = Sha256::new(); sha.input(&hex_bytes("0303030303030303030303030303030303030303030303030303030303030303").unwrap()); sha.result(&mut out.payment_hash); out }); chan.pending_htlcs.push({ let mut out = HTLCOutput{ htlc_id: 4, outbound: false, amount_msat: 4000000, cltv_expiry: 504, payment_hash: [0; 32], state: HTLCState::Committed, pending_forward_state: None, }; let mut sha = Sha256::new(); sha.input(&hex_bytes("0404040404040404040404040404040404040404040404040404040404040404").unwrap()); sha.result(&mut out.payment_hash); out }); { // commitment tx with all five HTLCs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 0; test_commitment!("304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b70606", "30440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f06", "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8007e80300000000000022002052bfef0479d7b293c27e0f1eb294bea154c63a3294ef092c19af51409bce0e2ad007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de843110e0a06a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e04004730440220275b0c325a5e9355650dc30c0eccfbc7efb23987c24b556b9dfdd40effca18d202206caceb2c067836c51f296740c7ae807ffcbfbf1dd3a0d56b6de9a5b247985f060147304402204fd4928835db1ccdfc40f5c78ce9bd65249b16348df81f0c44328dcdefc97d630220194d3869c38bc732dd87d13d2958015e2fc16829e74cd4377f84d215c0b7060601475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220"); assert_eq!(unsigned_tx.1.len(), 5); test_htlc_output!(0, "304402206a6e59f18764a5bf8d4fa45eebc591566689441229c918b480fb2af8cc6a4aeb02205248f273be447684b33e3c8d1d85a8e0ca9fa0bae9ae33f0527ada9c162919a6", "304402207cb324fa0de88f452ffa9389678127ebcf4cabe1dd848b8e076c1a1962bf34720220116ed922b12311bd602d67e60d2529917f21c5b82f25ff6506c0f87886b4dfd5", "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"); test_htlc_output!(1, "3045022100d5275b3619953cb0c3b5aa577f04bc512380e60fa551762ce3d7a1bb7401cff9022037237ab0dac3fe100cde094e82e2bed9ba0ed1bb40154b48e56aa70f259e608b", "3045022100c89172099507ff50f4c925e6c5150e871fb6e83dd73ff9fbb72f6ce829a9633f02203a63821d9162e99f9be712a68f9e589483994feae2661e4546cd5b6cec007be5", "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"); test_htlc_output!(2, "304402201b63ec807771baf4fdff523c644080de17f1da478989308ad13a58b51db91d360220568939d38c9ce295adba15665fa68f51d967e8ed14a007b751540a80b325f202", "3045022100def389deab09cee69eaa1ec14d9428770e45bcbe9feb46468ecf481371165c2f022015d2e3c46600b2ebba8dcc899768874cc6851fd1ecb3fffd15db1cc3de7e10da", "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"); test_htlc_output!(3, "3045022100daee1808f9861b6c3ecd14f7b707eca02dd6bdfc714ba2f33bc8cdba507bb182022026654bf8863af77d74f51f4e0b62d461a019561bb12acb120d3f7195d148a554", "30440220643aacb19bbb72bd2b635bc3f7375481f5981bace78cdd8319b2988ffcc6704202203d27784ec8ad51ed3bd517a05525a5139bb0b755dd719e0054332d186ac08727", "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"); test_htlc_output!(4, "304402207e0410e45454b0978a623f36a10626ef17b27d9ad44e2760f98cfa3efb37924f0220220bd8acd43ecaa916a80bd4f919c495a2c58982ce7c8625153f8596692a801d", "30440220549e80b4496803cbc4a1d09d46df50109f546d43fbbf86cd90b174b1484acd5402205f12a4f995cb9bded597eabfee195a285986aa6d93ae5bb72507ebc6a4e2349e", "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"); } { // commitment tx with seven outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 647; test_commitment!("3045022100a5c01383d3ec646d97e40f44318d49def817fcd61a0ef18008a665b3e151785502203e648efddd5838981ef55ec954be69c4a652d021e6081a100d034de366815e9b", "304502210094bfd8f5572ac0157ec76a9551b6c5216a4538c07cd13a51af4a54cb26fa14320220768efce8ce6f4a5efac875142ff19237c011343670adf9c7ac69704a120d1163", "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"); assert_eq!(unsigned_tx.1.len(), 5); test_htlc_output!(0, "30440220385a5afe75632f50128cbb029ee95c80156b5b4744beddc729ad339c9ca432c802202ba5f48550cad3379ac75b9b4fedb86a35baa6947f16ba5037fb8b11ab343740", "304402205999590b8a79fa346e003a68fd40366397119b2b0cdf37b149968d6bc6fbcc4702202b1e1fb5ab7864931caed4e732c359e0fe3d86a548b557be2246efb1708d579a", "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"); test_htlc_output!(1, "304402207ceb6678d4db33d2401fdc409959e57c16a6cb97a30261d9c61f29b8c58d34b90220084b4a17b4ca0e86f2d798b3698ca52de5621f2ce86f80bed79afa66874511b0", "304402207ff03eb0127fc7c6cae49cc29e2a586b98d1e8969cf4a17dfa50b9c2647720b902205e2ecfda2252956c0ca32f175080e75e4e390e433feb1f8ce9f2ba55648a1dac", "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"); test_htlc_output!(2, "304402206a401b29a0dff0d18ec903502c13d83e7ec019450113f4a7655a4ce40d1f65ba0220217723a084e727b6ca0cc8b6c69c014a7e4a01fcdcba3e3993f462a3c574d833", "3045022100d50d067ca625d54e62df533a8f9291736678d0b86c28a61bb2a80cf42e702d6e02202373dde7e00218eacdafb9415fe0e1071beec1857d1af3c6a201a44cbc47c877", "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"); test_htlc_output!(3, "30450221009b1c987ba599ee3bde1dbca776b85481d70a78b681a8d84206723e2795c7cac002207aac84ad910f8598c4d1c0ea2e3399cf6627a4e3e90131315bc9f038451ce39d", "3045022100db9dc65291077a52728c622987e9895b7241d4394d6dcb916d7600a3e8728c22022036ee3ee717ba0bb5c45ee84bc7bbf85c0f90f26ae4e4a25a6b4241afa8a3f1cb", "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"); test_htlc_output!(4, "3045022100cc28030b59f0914f45b84caa983b6f8effa900c952310708c2b5b00781117022022027ba2ccdf94d03c6d48b327f183f6e28c8a214d089b9227f94ac4f85315274f0", "304402202d1a3c0d31200265d2a2def2753ead4959ae20b4083e19553acfffa5dfab60bf022020ede134149504e15b88ab261a066de49848411e15e70f9e6a5462aec2949f8f", "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"); } { // commitment tx with six outputs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 648; test_commitment!("3044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b057", "3045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de", "02000000000101bef67e4e2fb9ddeeb3461973cd4c62abb35050b1add772995b820b584a488489000000000038b02b8006d007000000000000220020403d394747cae42e98ff01734ad5c08f82ba123d3d9a620abda88989651e2ab5d007000000000000220020748eba944fedc8827f6b06bc44678f93c0f9e6078b35c6331ed31e75f8ce0c2db80b000000000000220020c20b5d1f8584fd90443e7b7b720136174fa4b9333c261d04dbbd012635c0f419a00f0000000000002200208c48d15160397c9731df9bc3b236656efb6665fbfe92b4a6878e88a499f741c4c0c62d0000000000160014ccf1af2f2aabee14bb40fa3851ab2301de8431104e9d6a00000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0400483045022100a2270d5950c89ae0841233f6efea9c951898b301b2e89e0adbd2c687b9f32efa02207943d90f95b9610458e7c65a576e149750ff3accaacad004cd85e70b235e27de01473044022072714e2fbb93cdd1c42eb0828b4f2eff143f717d8f26e79d6ada4f0dcb681bbe02200911be4e5161dd6ebe59ff1c58e1997c4aea804f81db6b698821db6093d7b05701475221023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb21030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c152ae3e195220"); assert_eq!(unsigned_tx.1.len(), 4); test_htlc_output!(0, "3044022062ef2e77591409d60d7817d9bb1e71d3c4a2931d1a6c7c8307422c84f001a251022022dad9726b0ae3fe92bda745a06f2c00f92342a186d84518588cf65f4dfaada8", "3045022100a4c574f00411dd2f978ca5cdc1b848c311cd7849c087ad2f21a5bce5e8cc5ae90220090ae39a9bce2fb8bc879d7e9f9022df249f41e25e51f1a9bf6447a9eeffc098", "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"); test_htlc_output!(1, "3045022100e968cbbb5f402ed389fdc7f6cd2a80ed650bb42c79aeb2a5678444af94f6c78502204b47a1cb24ab5b0b6fe69fe9cfc7dba07b9dd0d8b95f372c1d9435146a88f8d4", "304402207679cf19790bea76a733d2fa0672bd43ab455687a068f815a3d237581f57139a0220683a1a799e102071c206b207735ca80f627ab83d6616b4bcd017c5d79ef3e7d0", "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"); test_htlc_output!(2, "3045022100aa91932e305292cf9969cc23502bbf6cef83a5df39c95ad04a707c4f4fed5c7702207099fc0f3a9bfe1e7683c0e9aa5e76c5432eb20693bf4cb182f04d383dc9c8c2", "304402200df76fea718745f3c529bac7fd37923e7309ce38b25c0781e4cf514dd9ef8dc802204172295739dbae9fe0474dcee3608e3433b4b2af3a2e6787108b02f894dcdda3", "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"); test_htlc_output!(3, "3044022035cac88040a5bba420b1c4257235d5015309113460bc33f2853cd81ca36e632402202fc94fd3e81e9d34a9d01782a0284f3044370d03d60f3fc041e2da088d2de58f", "304402200daf2eb7afd355b4caf6fb08387b5f031940ea29d1a9f35071288a839c9039e4022067201b562456e7948616c13acb876b386b511599b58ac1d94d127f91c50463a6", "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"); } { // commitment tx with six outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 2069; test_commitment!("3044022001d55e488b8b035b2dd29d50b65b530923a416d47f377284145bc8767b1b6a75022019bb53ddfe1cefaf156f924777eaaf8fdca1810695a7d0a247ad2afba8232eb4", "304402203ca8f31c6a47519f83255dc69f1894d9a6d7476a19f498d31eaf0cd3a85eeb63022026fd92dc752b33905c4c838c528b692a8ad4ced959990b5d5ee2ff940fa90eea", "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"); assert_eq!(unsigned_tx.1.len(), 4); test_htlc_output!(0, "3045022100d1cf354de41c1369336cf85b225ed033f1f8982a01be503668df756a7e668b66022001254144fb4d0eecc61908fccc3388891ba17c5d7a1a8c62bdd307e5a513f992", "3044022056eb1af429660e45a1b0b66568cb8c4a3aa7e4c9c292d5d6c47f86ebf2c8838f022065c3ac4ebe980ca7a41148569be4ad8751b0a724a41405697ec55035dae66402", "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"); test_htlc_output!(1, "3045022100d065569dcb94f090345402736385efeb8ea265131804beac06dd84d15dd2d6880220664feb0b4b2eb985fadb6ec7dc58c9334ea88ce599a9be760554a2d4b3b5d9f4", "3045022100914bb232cd4b2690ee3d6cb8c3713c4ac9c4fb925323068d8b07f67c8541f8d9022057152f5f1615b793d2d45aac7518989ae4fe970f28b9b5c77504799d25433f7f", "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"); test_htlc_output!(2, "3045022100d4e69d363de993684eae7b37853c40722a4c1b4a7b588ad7b5d8a9b5006137a102207a069c628170ee34be5612747051bdcc087466dbaa68d5756ea81c10155aef18", "304402200e362443f7af830b419771e8e1614fc391db3a4eb799989abfc5ab26d6fcd032022039ab0cad1c14dfbe9446bf847965e56fe016e0cbcf719fd18c1bfbf53ecbd9f9", "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"); test_htlc_output!(3, "30450221008ec888e36e4a4b3dc2ed6b823319855b2ae03006ca6ae0d9aa7e24bfc1d6f07102203b0f78885472a67ff4fe5916c0bb669487d659527509516fc3a08e87a2cc0a7c", "304402202c3e14282b84b02705dfd00a6da396c9fe8a8bcb1d3fdb4b20a4feba09440e8b02202b058b39aa9b0c865b22095edcd9ff1f71bbfe20aa4993755e54d042755ed0d5", "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"); } { // commitment tx with five outputs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 2070; test_commitment!("3045022100f2377f7a67b7fc7f4e2c0c9e3a7de935c32417f5668eda31ea1db401b7dc53030220415fdbc8e91d0f735e70c21952342742e25249b0d062d43efbfc564499f37526", "30440220443cb07f650aebbba14b8bc8d81e096712590f524c5991ac0ed3bbc8fd3bd0c7022028a635f548e3ca64b19b69b1ea00f05b22752f91daf0b6dab78e62ba52eb7fd0", "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"); assert_eq!(unsigned_tx.1.len(), 3); test_htlc_output!(0, "3045022100eed143b1ee4bed5dc3cde40afa5db3e7354cbf9c44054b5f713f729356f08cf7022077161d171c2bbd9badf3c9934de65a4918de03bbac1450f715275f75b103f891", "3045022100a0d043ed533e7fb1911e0553d31a8e2f3e6de19dbc035257f29d747c5e02f1f5022030cd38d8e84282175d49c1ebe0470db3ebd59768cf40780a784e248a43904fb8", "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"); test_htlc_output!(1, "3044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf6", "3045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d", "0200000000010140a83ce364747ff277f4d7595d8d15f708418798922c40bc2b056aca5485a218010000000000000000015c060000000000002200204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e0500473044022071e9357619fd8d29a411dc053b326a5224c5d11268070e88ecb981b174747c7a02202b763ae29a9d0732fa8836dd8597439460b50472183f420021b768981b4f7cf601483045022100adb1d679f65f96178b59f23ed37d3b70443118f345224a07ecb043eee2acc157022034d24524fe857144a3bcfff3065a9994d0a6ec5f11c681e49431d573e242612d01008576a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a9148a486ff2e31d6158bf39e2608864d63fefd09d5b88ac6868f7010000"); test_htlc_output!(2, "3045022100c9458a4d2cbb741705577deb0a890e5cb90ee141be0400d3162e533727c9cb2102206edcf765c5dc5e5f9b976ea8149bf8607b5a0efb30691138e1231302b640d2a4", "304402200831422aa4e1ee6d55e0b894201770a8f8817a189356f2d70be76633ffa6a6f602200dd1b84a4855dc6727dd46c98daae43dfc70889d1ba7ef0087529a57c06e5e04", "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"); } { // commitment tx with five outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 2194; test_commitment!("3045022100d33c4e541aa1d255d41ea9a3b443b3b822ad8f7f86862638aac1f69f8f760577022007e2a18e6931ce3d3a804b1c78eda1de17dbe1fb7a95488c9a4ec86203953348", "304402203b1b010c109c2ecbe7feb2d259b9c4126bd5dc99ee693c422ec0a5781fe161ba0220571fe4e2c649dea9c7aaf7e49b382962f6a3494963c97d80fef9a430ca3f7061", "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"); assert_eq!(unsigned_tx.1.len(), 3); test_htlc_output!(0, "30450221009ed2f0a67f99e29c3c8cf45c08207b765980697781bb727fe0b1416de0e7622902206052684229bc171419ed290f4b615c943f819c0262414e43c5b91dcf72ddcf44", "3044022004ad5f04ae69c71b3b141d4db9d0d4c38d84009fb3cfeeae6efdad414487a9a0022042d3fe1388c1ff517d1da7fb4025663d372c14728ed52dc88608363450ff6a2f", "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"); test_htlc_output!(1, "30440220155d3b90c67c33a8321996a9be5b82431b0c126613be751d400669da9d5c696702204318448bcd48824439d2c6a70be6e5747446be47ff45977cf41672bdc9b6b12d", "304402201707050c870c1f77cc3ed58d6d71bf281de239e9eabd8ef0955bad0d7fe38dcc02204d36d80d0019b3a71e646a08fa4a5607761d341ae8be371946ebe437c289c915", "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"); test_htlc_output!(2, "3045022100a12a9a473ece548584aabdd051779025a5ed4077c4b7aa376ec7a0b1645e5a48022039490b333f53b5b3e2ddde1d809e492cba2b3e5fc3a436cd3ffb4cd3d500fa5a", "3045022100ff200bc934ab26ce9a559e998ceb0aee53bc40368e114ab9d3054d9960546e2802202496856ca163ac12c143110b6b3ac9d598df7254f2e17b3b94c3ab5301f4c3b0", "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"); } { // commitment tx with four outputs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 2195; test_commitment!("304402205e2f76d4657fb732c0dfc820a18a7301e368f5799e06b7828007633741bda6df0220458009ae59d0c6246065c419359e05eb2a4b4ef4a1b310cc912db44eb7924298", "304402203b12d44254244b8ff3bb4129b0920fd45120ab42f553d9976394b099d500c99e02205e95bb7a3164852ef0c48f9e0eaf145218f8e2c41251b231f03cbdc4f29a5429", "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"); assert_eq!(unsigned_tx.1.len(), 2); test_htlc_output!(0, "3045022100a8a78fa1016a5c5c3704f2e8908715a3cef66723fb95f3132ec4d2d05cd84fb4022025ac49287b0861ec21932405f5600cbce94313dbde0e6c5d5af1b3366d8afbfc", "3045022100be6ae1977fd7b630a53623f3f25c542317ccfc2b971782802a4f1ef538eb22b402207edc4d0408f8f38fd3c7365d1cfc26511b7cd2d4fecd8b005fba3cd5bc704390", "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"); test_htlc_output!(1, "3045022100e769cb156aa2f7515d126cef7a69968629620ce82afcaa9e210969de6850df4602200b16b3f3486a229a48aadde520dbee31ae340dbadaffae74fbb56681fef27b92", "30440220665b9cb4a978c09d1ca8977a534999bc8a49da624d0c5439451dd69cde1a003d022070eae0620f01f3c1bd029cc1488da13fb40fdab76f396ccd335479a11c5276d8", "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"); } { // commitment tx with four outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 3702; test_commitment!("3045022100c1a3b0b60ca092ed5080121f26a74a20cec6bdee3f8e47bae973fcdceb3eda5502207d467a9873c939bf3aa758014ae67295fedbca52412633f7e5b2670fc7c381c1", "304402200e930a43c7951162dc15a2b7344f48091c74c70f7024e7116e900d8bcfba861c022066fa6cbda3929e21daa2e7e16a4b948db7e8919ef978402360d1095ffdaff7b0", "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"); assert_eq!(unsigned_tx.1.len(), 2); test_htlc_output!(0, "3045022100dfb73b4fe961b31a859b2bb1f4f15cabab9265016dd0272323dc6a9e85885c54022059a7b87c02861ee70662907f25ce11597d7b68d3399443a831ae40e777b76bdb", "304402202765b9c9ece4f127fa5407faf66da4c5ce2719cdbe47cd3175fc7d48b482e43d02205605125925e07bad1e41c618a4b434d72c88a164981c4b8af5eaf4ee9142ec3a", "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"); test_htlc_output!(1, "3045022100ea9dc2a7c3c3640334dab733bb4e036e32a3106dc707b24227874fa4f7da746802204d672f7ac0fe765931a8df10b81e53a3242dd32bd9dc9331eb4a596da87954e9", "30440220048a41c660c4841693de037d00a407810389f4574b3286afb7bc392a438fa3f802200401d71fa87c64fe621b49ac07e3bf85157ac680acb977124da28652cc7f1a5c", "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"); } { // commitment tx with three outputs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 3703; test_commitment!("30450221008b7c191dd46893b67b628e618d2dc8e81169d38bade310181ab77d7c94c6675e02203b4dd131fd7c9deb299560983dcdc485545c98f989f7ae8180c28289f9e6bdb0", "3044022047305531dd44391dce03ae20f8735005c615eb077a974edb0059ea1a311857d602202e0ed6972fbdd1e8cb542b06e0929bc41b2ddf236e04cb75edd56151f4197506", "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"); assert_eq!(unsigned_tx.1.len(), 1); test_htlc_output!(0, "3044022044f65cf833afdcb9d18795ca93f7230005777662539815b8a601eeb3e57129a902206a4bf3e53392affbba52640627defa8dc8af61c958c9e827b2798ab45828abdd", "3045022100b94d931a811b32eeb885c28ddcf999ae1981893b21dd1329929543fe87ce793002206370107fdd151c5f2384f9ceb71b3107c69c74c8ed5a28a94a4ab2d27d3b0724", "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"); } { // commitment tx with three outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 4914; test_commitment!("304402206d6cb93969d39177a09d5d45b583f34966195b77c7e585cf47ac5cce0c90cefb022031d71ae4e33a4e80df7f981d696fbdee517337806a3c7138b7491e2cbb077a0e", "304402206a2679efa3c7aaffd2a447fd0df7aba8792858b589750f6a1203f9259173198a022008d52a0e77a99ab533c36206cb15ad7aeb2aa72b93d4b571e728cb5ec2f6fe26", "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"); assert_eq!(unsigned_tx.1.len(), 1); test_htlc_output!(0, "3045022100fcb38506bfa11c02874092a843d0cc0a8613c23b639832564a5f69020cb0f6ba02206508b9e91eaa001425c190c68ee5f887e1ad5b1b314002e74db9dbd9e42dbecf", "304502210086e76b460ddd3cea10525fba298405d3fe11383e56966a5091811368362f689a02200f72ee75657915e0ede89c28709acd113ede9e1b7be520e3bc5cda425ecd6e68", "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"); } { // commitment tx with two outputs untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 4915; test_commitment!("304402200769ba89c7330dfa4feba447b6e322305f12ac7dac70ec6ba997ed7c1b598d0802204fe8d337e7fee781f9b7b1a06e580b22f4f79d740059560191d7db53f8765552", "3045022100a012691ba6cea2f73fa8bac37750477e66363c6d28813b0bb6da77c8eb3fb0270220365e99c51304b0b1a6ab9ea1c8500db186693e39ec1ad5743ee231b0138384b9", "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"); assert_eq!(unsigned_tx.1.len(), 0); } { // commitment tx with two outputs untrimmed (maximum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 9651180; test_commitment!("3044022037f83ff00c8e5fb18ae1f918ffc24e54581775a20ff1ae719297ef066c71caa9022039c529cccd89ff6c5ed1db799614533844bd6d101da503761c45c713996e3bbd", "30440220514f977bf7edc442de8ce43ace9686e5ebdc0f893033f13e40fb46c8b8c6e1f90220188006227d175f5c35da0b092c57bea82537aed89f7778204dc5bacf4f29f2b9", "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"); assert_eq!(unsigned_tx.1.len(), 0); } { // commitment tx with one output untrimmed (minimum feerate) chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 9651181; test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e", "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1", "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"); assert_eq!(unsigned_tx.1.len(), 0); } { // commitment tx with fee greater than funder amount chan.value_to_self_msat = 6993000000; // 7000000000 - 7000000 chan.feerate_per_kw = 9651936; test_commitment!("3044022064901950be922e62cbe3f2ab93de2b99f37cff9fc473e73e394b27f88ef0731d02206d1dfa227527b4df44a07599289e207d6fd9cca60c0365682dcd3deaf739567e", "3044022031a82b51bd014915fe68928d1abf4b9885353fb896cac10c3fdd88d7f9c7f2e00220716bda819641d2c63e65d3549b6120112e1aeaf1742eed94a471488e79e206b1", "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"); assert_eq!(unsigned_tx.1.len(), 0); } } #[test] fn test_per_commitment_secret_gen() { // Test vectors from BOLT 3 Appendix D: let mut seed = [0; 32]; seed[0..32].clone_from_slice(&hex_bytes("0000000000000000000000000000000000000000000000000000000000000000").unwrap()); assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655), hex_bytes("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap()[..]); seed[0..32].clone_from_slice(&hex_bytes("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF").unwrap()); assert_eq!(chan_utils::build_commitment_secret(seed, 281474976710655), hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap()[..]); assert_eq!(chan_utils::build_commitment_secret(seed, 0xaaaaaaaaaaa), hex_bytes("56f4008fb007ca9acf0e15b054d5c9fd12ee06cea347914ddbaed70d1c13a528").unwrap()[..]); assert_eq!(chan_utils::build_commitment_secret(seed, 0x555555555555), hex_bytes("9015daaeb06dba4ccc05b91b2f73bd54405f2be9f217fbacd3c5ac2e62327d31").unwrap()[..]); seed[0..32].clone_from_slice(&hex_bytes("0101010101010101010101010101010101010101010101010101010101010101").unwrap()); assert_eq!(chan_utils::build_commitment_secret(seed, 1), hex_bytes("915c75942a26bb3a433a8ce2cb0427c29ec6c1775cfc78328b57f6ba7bfeaa9c").unwrap()[..]); } #[test] fn test_key_derivation() { // Test vectors from BOLT 3 Appendix E: let secp_ctx = Secp256k1::new(); let base_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("000102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f").unwrap()[..]).unwrap(); let per_commitment_secret = SecretKey::from_slice(&secp_ctx, &hex_bytes("1f1e1d1c1b1a191817161514131211100f0e0d0c0b0a09080706050403020100").unwrap()[..]).unwrap(); let base_point = PublicKey::from_secret_key(&secp_ctx, &base_secret).unwrap(); assert_eq!(base_point.serialize()[..], hex_bytes("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2").unwrap()[..]); let per_commitment_point = PublicKey::from_secret_key(&secp_ctx, &per_commitment_secret).unwrap(); assert_eq!(per_commitment_point.serialize()[..], hex_bytes("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486").unwrap()[..]); assert_eq!(chan_utils::derive_public_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..], hex_bytes("0235f2dbfaa89b57ec7b055afe29849ef7ddfeb1cefdb9ebdc43f5494984db29e5").unwrap()[..]); assert_eq!(chan_utils::derive_private_key(&secp_ctx, &per_commitment_point, &base_secret).unwrap(), SecretKey::from_slice(&secp_ctx, &hex_bytes("cbced912d3b21bf196a766651e436aff192362621ce317704ea2f75d87e7be0f").unwrap()[..]).unwrap()); assert_eq!(chan_utils::derive_public_revocation_key(&secp_ctx, &per_commitment_point, &base_point).unwrap().serialize()[..], hex_bytes("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0").unwrap()[..]); assert_eq!(chan_utils::derive_private_revocation_key(&secp_ctx, &per_commitment_secret, &base_secret).unwrap(), SecretKey::from_slice(&secp_ctx, &hex_bytes("d09ffff62ddb2297ab000cc85bcb4283fdeb6aa052affbc9dddcf33b61078110").unwrap()[..]).unwrap()); } }