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check the input shape in LocalCommitmentTransaction.new_missing_local_sig

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Devrandom 2020-08-11 09:23:15 +02:00
parent f60026387e
commit fd2db4028a
1 changed files with 16 additions and 1 deletions
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17
lightning/src/ln/chan_utils.rs
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@ -599,11 +599,26 @@ impl LocalCommitmentTransaction {
}
/// Generate a new LocalCommitmentTransaction based on a raw commitment transaction,
/// remote signature and both parties keys
/// remote signature and both parties keys.
///
/// The unsigned transaction outputs must be consistent with htlc_data. This function
/// only checks that the shape and amounts are consistent, but does not check the scriptPubkey.
pub fn new_missing_local_sig(unsigned_tx: Transaction, their_sig: Signature, our_funding_key: &PublicKey, their_funding_key: &PublicKey, local_keys: TxCreationKeys, feerate_per_kw: u32, htlc_data: Vec<(HTLCOutputInCommitment, Option<Signature>)>) -> LocalCommitmentTransaction {
if unsigned_tx.input.len() != 1 { panic!("Tried to store a commitment transaction that had input count != 1!"); }
if unsigned_tx.input[0].witness.len() != 0 { panic!("Tried to store a signed commitment transaction?"); }
for htlc in &htlc_data {
if let Some(index) = htlc.0.transaction_output_index {
let out = &unsigned_tx.output[index as usize];
if out.value != htlc.0.amount_msat / 1000 {
panic!("HTLC at index {} has incorrect amount", index);
}
if !out.script_pubkey.is_v0_p2wsh() {
panic!("HTLC at index {} doesn't have p2wsh scriptPubkey", index);
}
}
}
Self {
unsigned_tx,
their_sig,