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splice: Enable shared tx on interactivetx

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By placing the funding tx into `interactivetx`, the message will be compressed by only sending the txid via tlvs.

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This commit is contained in:
Dusty Daemon 2024-11-15 15:06:37 -05:00 • committed by Rusty Russell
parent 90c786f61b
commit d04478f99e
1 changed files with 28 additions and 4 deletions
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32
channeld/channeld.c
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@ -3485,6 +3485,12 @@ static void resume_splice_negotiation(struct peer *peer,
"Splicing bad tx_signatures msg %s",
tal_hex(msg, msg));
if (!their_txsigs_tlvs->shared_input_signature)
peer_failed_warn(peer->pps, &peer->channel_id,
"tx_signatures msg must include"
" `shared_input_signature`. Msg: %s",
tal_hex(msg, msg));
if (peer->splicing)
peer->splicing->inws = tal_steal(peer->splicing, inws);
@ -3501,8 +3507,8 @@ static void resume_splice_negotiation(struct peer *peer,
/* BOLT-a8b9f495cac28124c69cc5ee429f9ef2bacb9921 #2:
* Both nodes:
* - MUST sign the transaction using SIGHASH_ALL */
their_sig.sighash_type = SIGHASH_ALL;
their_sig.s = *their_txsigs_tlvs->shared_input_signature;
their_sig->sighash_type = SIGHASH_ALL;
their_sig->s = *their_txsigs_tlvs->shared_input_signature;
/* Set the commit_sig on the commitment tx psbt */
if (!psbt_input_set_signature(current_psbt,
@ -3727,7 +3733,7 @@ static void splice_accepter(struct peer *peer, const u8 *inmsg)
peer_failed_warn(peer->pps, &peer->channel_id,
"Splice internal error: mismatched channelid");
if (!pubkey_eq(&splice_remote_pubkey,
if (!pubkey_eq(&peer->splicing->remote_funding_pubkey,
&peer->channel->funding_pubkey[REMOTE]))
peer_failed_warn(peer->pps, &peer->channel_id,
"Splice doesnt support changing pubkeys");
@ -3758,6 +3764,11 @@ static void splice_accepter(struct peer *peer, const u8 *inmsg)
ictx->desired_psbt = NULL;
ictx->pause_when_complete = false;
ictx->shared_outpoint = tal(ictx, struct bitcoin_outpoint);
*ictx->shared_outpoint = peer->channel->funding;
ictx->funding_tx = bitcoin_tx_from_txid(peer,
peer->channel->funding.txid);
error = process_interactivetx_updates(tmpctx, ictx,
&peer->splicing->received_tx_complete,
&abort_msg);
@ -3845,6 +3856,7 @@ static void splice_initiator(struct peer *peer, const u8 *inmsg)
u32 sequence = 0;
u8 *scriptPubkey;
/* DTODO: Remove ictx from this function as its no longer used. */
ictx = new_interactivetx_context(tmpctx, TX_INITIATOR,
peer->pps, peer->channel_id);
@ -3860,7 +3872,7 @@ static void splice_initiator(struct peer *peer, const u8 *inmsg)
peer_failed_warn(peer->pps, &peer->channel_id,
"Splice[ACK] internal error: mismatched channelid");
if (!pubkey_eq(&splice_remote_pubkey,
if (!pubkey_eq(&peer->splicing->remote_funding_pubkey,
&peer->channel->funding_pubkey[REMOTE]))
peer_failed_warn(peer->pps, &peer->channel_id,
"Splice[ACK] doesnt support changing pubkeys");
@ -3926,6 +3938,10 @@ static void splice_initiator(struct peer *peer, const u8 *inmsg)
psbt_add_serials(ictx->desired_psbt, ictx->our_role);
ictx->shared_outpoint = tal(ictx, struct bitcoin_outpoint);
*ictx->shared_outpoint = peer->channel->funding;
ictx->funding_tx = prev_tx;
peer->splicing->tx_add_input_count = 0;
peer->splicing->tx_add_output_count = 0;
@ -3949,6 +3965,7 @@ static void splice_initiator_user_finalized(struct peer *peer)
{
u8 *outmsg;
struct interactivetx_context *ictx;
struct bitcoin_tx *prev_tx;
bool sign_first;
char *error;
u32 chan_output_index, splice_funding_index;
@ -3961,6 +3978,9 @@ static void splice_initiator_user_finalized(struct peer *peer)
const enum tx_role our_role = TX_INITIATOR;
u8 *abort_msg;
/* We must loading the funding tx as our previous utxo */
prev_tx = bitcoin_tx_from_txid(peer, peer->channel->funding.txid);
ictx = new_interactivetx_context(tmpctx, our_role,
peer->pps, peer->channel_id);
@ -3970,6 +3990,10 @@ static void splice_initiator_user_finalized(struct peer *peer)
ictx->tx_add_input_count = peer->splicing->tx_add_input_count;
ictx->tx_add_output_count = peer->splicing->tx_add_output_count;
ictx->shared_outpoint = tal(ictx, struct bitcoin_outpoint);
*ictx->shared_outpoint = peer->channel->funding;
ictx->funding_tx = prev_tx;
error = process_interactivetx_updates(tmpctx, ictx,
&peer->splicing->received_tx_complete,
&abort_msg);