/// We use this to track local commitment transactions and put off signing them until we are ready
/// to broadcast. Eventually this will require a signer which is possibly external, but for now we
/// just pass in the SecretKeys required.
-pub(crate) struct LocalCommitmentTransaction {
+pub struct LocalCommitmentTransaction {
tx: Transaction
}
impl LocalCommitmentTransaction {
} }
}
- pub fn new_missing_local_sig(mut tx: Transaction, their_sig: &Signature, our_funding_key: &PublicKey, their_funding_key: &PublicKey) -> LocalCommitmentTransaction {
+ /// Generate a new LocalCommitmentTransaction based on a raw commitment transaction,
+ /// remote signature and both parties keys
+ pub(crate) fn new_missing_local_sig(mut tx: Transaction, their_sig: &Signature, our_funding_key: &PublicKey, their_funding_key: &PublicKey) -> LocalCommitmentTransaction {
if tx.input.len() != 1 { panic!("Tried to store a commitment transaction that had input count != 1!"); }
if tx.input[0].witness.len() != 0 { panic!("Tried to store a signed commitment transaction?"); }
Self { tx }
}
+ /// Get the txid of the local commitment transaction contained in this
+ /// LocalCommitmentTransaction
pub fn txid(&self) -> Sha256dHash {
self.tx.txid()
}
+ /// Check if LocalCommitmentTransaction has already been signed by us
pub fn has_local_sig(&self) -> bool {
if self.tx.input.len() != 1 { panic!("Commitment transactions must have input count == 1!"); }
if self.tx.input[0].witness.len() == 4 {
}
}
+ /// Add local signature for LocalCommitmentTransaction, do nothing if signature is already
+ /// present
+ ///
+ /// Funding key is your key included in the 2-2 funding_outpoint lock. Should be provided
+ /// by your ChannelKeys.
+ /// Funding redeemscript is script locking funding_outpoint. This is the mutlsig script
+ /// between your own funding key and your counterparty's. Currently, this is provided in
+ /// ChannelKeys::sign_local_commitment() calls directly.
+ /// Channel value is amount locked in funding_outpoint.
pub fn add_local_sig<T: secp256k1::Signing>(&mut self, funding_key: &SecretKey, funding_redeemscript: &Script, channel_value_satoshis: u64, secp_ctx: &Secp256k1<T>) {
if self.has_local_sig() { return; }
let sighash = hash_to_message!(&bip143::SighashComponents::new(&self.tx)
self.tx.input[0].witness.push(funding_redeemscript.as_bytes().to_vec());
}
- pub fn without_valid_witness(&self) -> &Transaction { &self.tx }
+ /// Get raw transaction without asserting if witness is complete
+ pub(crate) fn without_valid_witness(&self) -> &Transaction { &self.tx }
+ /// Get raw transaction with panics if witness is incomplete
pub fn with_valid_witness(&self) -> &Transaction {
assert!(self.has_local_sig());
&self.tx