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channeld: Code to implement splicing

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Update the lightningd <-> channeld interface with lots of new commands to needed to facilitate spicing.

Implement the channeld splicing protocol leveraging the interactivetx protocol.

Implement lightningd’s channel_control to support channeld in its splicing efforts.

Changelog-Added: Added the features to enable splicing & resizing of active channels.
This commit is contained in:
Dusty Daemon
2023-07-27 14:37:52 -07:00
committed by Rusty Russell
parent ebd0a3fd69
commit 4628e3ace8
88 changed files with 4560 additions and 644 deletions
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46
openingd/dualopend.c
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@@ -760,14 +760,14 @@ static char *check_balances(const tal_t *ctx,
assert(ok);
initiator_weight +=
psbt_input_weight(psbt, i);
psbt_input_get_weight(psbt, i);
} else {
ok = amount_sat_add(&accepter_inputs,
accepter_inputs, amt);
assert(ok);
accepter_weight +=
psbt_input_weight(psbt, i);
psbt_input_get_weight(psbt, i);
}
}
tot_output_amt = AMOUNT_SAT(0);
@@ -826,13 +826,13 @@ static char *check_balances(const tal_t *ctx,
}
initiator_weight +=
psbt_output_weight(psbt, i);
psbt_output_get_weight(psbt, i);
} else {
ok = amount_sat_add(&accepter_outs,
accepter_outs, amt);
assert(ok);
accepter_weight +=
psbt_output_weight(psbt, i);
psbt_output_get_weight(psbt, i);
}
}
@@ -997,7 +997,8 @@ static u8 *psbt_to_tx_sigs_msg(const tal_t *ctx,
return towire_tx_signatures(ctx, &state->channel_id,
&state->tx_state->funding.txid,
ws);
ws,
NULL);
}
static void handle_tx_sigs(struct state *state, const u8 *msg)
@@ -1009,10 +1010,12 @@ static void handle_tx_sigs(struct state *state, const u8 *msg)
enum tx_role their_role = state->our_role == TX_INITIATOR ?
TX_ACCEPTER : TX_INITIATOR;
struct tlv_txsigs_tlvs *txsig_tlvs = tlv_txsigs_tlvs_new(tmpctx);
if (!fromwire_tx_signatures(tmpctx, msg, &cid, &txid,
cast_const3(
struct witness ***,
&witnesses)))
&witnesses),
&txsig_tlvs))
open_err_fatal(state, "Bad tx_signatures %s",
tal_hex(msg, msg));
@@ -1418,6 +1421,9 @@ static u8 *opening_negotiate_msg(const tal_t *ctx, struct state *state)
case WIRE_PEER_STORAGE:
case WIRE_YOUR_PEER_STORAGE:
case WIRE_STFU:
case WIRE_SPLICE:
case WIRE_SPLICE_ACK:
case WIRE_SPLICE_LOCKED:
break;
}
@@ -1792,6 +1798,9 @@ static bool run_tx_interactive(struct state *state,
case WIRE_PEER_STORAGE:
case WIRE_YOUR_PEER_STORAGE:
case WIRE_STFU:
case WIRE_SPLICE:
case WIRE_SPLICE_ACK:
case WIRE_SPLICE_LOCKED:
open_abort(state, "Unexpected wire message %s",
tal_hex(tmpctx, msg));
return false;
@@ -1873,7 +1882,7 @@ static u8 *accepter_commits(struct state *state,
struct amount_msat our_msats;
struct channel_id cid;
const u8 *wscript;
u8 *msg;
u8 *msg, *commit_msg;
char *error;
/* Find the funding transaction txid */
@@ -1911,9 +1920,12 @@ static u8 *accepter_commits(struct state *state,
}
remote_sig.sighash_type = SIGHASH_ALL;
struct tlv_commitment_signed_tlvs *cs_tlv
= tlv_commitment_signed_tlvs_new(tmpctx);
if (!fromwire_commitment_signed(tmpctx, msg, &cid,
&remote_sig.s,
&htlc_sigs))
&htlc_sigs, &cs_tlv))
open_err_fatal(state, "Parsing commitment signed %s",
tal_hex(tmpctx, msg));
@@ -2111,10 +2123,10 @@ static u8 *accepter_commits(struct state *state,
master_badmsg(WIRE_DUALOPEND_SEND_TX_SIGS, msg);
/* Send our commitment sigs over now */
peer_write(state->pps,
take(towire_commitment_signed(NULL,
&state->channel_id,
&local_sig.s, NULL)));
commit_msg = towire_commitment_signed(NULL, &state->channel_id,
&local_sig.s, NULL, NULL);
peer_write(state->pps, take(commit_msg));
tal_free(local_commit);
return msg;
}
@@ -2757,7 +2769,7 @@ static u8 *opener_commits(struct state *state,
assert(local_sig.sighash_type == SIGHASH_ALL);
msg = towire_commitment_signed(tmpctx, &state->channel_id,
&local_sig.s,
NULL);
NULL, NULL);
peer_write(state->pps, msg);
peer_billboard(false, "channel open: commitment sent, waiting for reply");
@@ -2770,9 +2782,12 @@ static u8 *opener_commits(struct state *state,
}
remote_sig.sighash_type = SIGHASH_ALL;
struct tlv_commitment_signed_tlvs *cs_tlv
= tlv_commitment_signed_tlvs_new(tmpctx);
if (!fromwire_commitment_signed(tmpctx, msg, &cid,
&remote_sig.s,
&htlc_sigs))
&htlc_sigs, &cs_tlv))
open_err_fatal(state, "Parsing commitment signed %s",
tal_hex(tmpctx, msg));
@@ -4184,6 +4199,9 @@ static u8 *handle_peer_in(struct state *state)
case WIRE_PEER_STORAGE:
case WIRE_YOUR_PEER_STORAGE:
case WIRE_STFU:
case WIRE_SPLICE:
case WIRE_SPLICE_ACK:
case WIRE_SPLICE_LOCKED:
break;
}