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onchaind: use the HSM to get the per-commitment-point.

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This means onchaind doesn't need the per-channel secret at all (aka. peer seed)
so we remove that from the onchaind_init message.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2018-07-23 11:53:03 +09:30
committed by Christian Decker
parent 2575dbf493
commit 613b65eede
4 changed files with 32 additions and 26 deletions
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6
lightningd/onchain_control.c
View File

@@ -400,7 +400,8 @@ enum watch_result onchaind_funding_spent(struct channel *channel,
hsmfd = hsm_get_client_fd(ld, &channel->peer->id,
channel->dbid,
HSM_CAP_SIGN_ONCHAIN_TX);
HSM_CAP_SIGN_ONCHAIN_TX
| HSM_CAP_COMMITMENT_POINT);
channel_set_owner(channel, new_channel_subd(ld,
"lightning_onchaind",
@@ -435,7 +436,7 @@ enum watch_result onchaind_funding_spent(struct channel *channel,
bitcoin_txid(channel->last_tx, &our_last_txid);
msg = towire_onchain_init(channel,
&channel->seed, &channel->their_shachain.chain,
&channel->their_shachain.chain,
channel->funding_satoshi,
&channel->channel_info.old_remote_per_commit,
&channel->channel_info.remote_per_commit,
@@ -455,6 +456,7 @@ enum watch_result onchaind_funding_spent(struct channel *channel,
channel->remote_shutdown_scriptpubkey,
&final_key,
channel->funder,
&channel->local_basepoints,
&channel->channel_info.theirbase,
tx,
blockheight,

30
onchaind/onchain.c
View File

@@ -368,6 +368,23 @@ static void hsm_sign_local_htlc_tx(struct bitcoin_tx *tx,
tal_hex(tmpctx, msg));
}
static void hsm_get_per_commitment_point(struct pubkey *per_commitment_point)
{
u8 *msg = towire_hsm_get_per_commitment_point(NULL, commit_num);
struct secret *unused;
if (!wire_sync_write(HSM_FD, take(msg)))
status_failed(STATUS_FAIL_HSM_IO, "Writing sign_htlc_tx to hsm");
msg = wire_sync_read(tmpctx, HSM_FD);
if (!msg
|| !fromwire_hsm_get_per_commitment_point_reply(tmpctx, msg,
per_commitment_point,
&unused))
status_failed(STATUS_FAIL_HSM_IO,
"Reading hsm_get_per_commitment_point_reply: %s",
tal_hex(tmpctx, msg));
}
static struct tracked_output *
new_tracked_output(struct tracked_output ***outs,
const struct bitcoin_txid *txid,
@@ -1415,7 +1432,6 @@ static void note_missing_htlcs(u8 **htlc_scripts,
static void handle_our_unilateral(const struct bitcoin_tx *tx,
u32 tx_blockheight,
const struct bitcoin_txid *txid,
const struct sha256 *shaseed,
const struct basepoints basepoints[NUM_SIDES],
const struct htlc_stub *htlcs,
const bool *tell_if_missing,
@@ -1439,10 +1455,7 @@ static void handle_our_unilateral(const struct bitcoin_tx *tx,
resolved_by_other(outs[0], txid, OUR_UNILATERAL);
/* Figure out what delayed to-us output looks like */
if (!per_commit_point(shaseed, &local_per_commitment_point, commit_num))
status_failed(STATUS_FAIL_INTERNAL_ERROR,
"Deriving local_per_commit_point for %"PRIu64,
commit_num);
hsm_get_per_commitment_point(&local_per_commitment_point);
/* keyset is const, we need a non-const ptr to set it up */
keyset = ks = tal(tx, struct keyset);
@@ -2102,13 +2115,11 @@ int main(int argc, char *argv[])
const tal_t *ctx = tal(NULL, char);
u8 *msg;
struct secret seed;
struct pubkey remote_per_commit_point, old_remote_per_commit_point;
enum side funder;
struct basepoints basepoints[NUM_SIDES];
struct shachain shachain;
struct bitcoin_tx *tx;
struct sha256 shaseed;
struct tracked_output **outs;
struct bitcoin_txid our_broadcast_txid, txid;
secp256k1_ecdsa_signature *remote_htlc_sigs;
@@ -2126,7 +2137,7 @@ int main(int argc, char *argv[])
msg = wire_sync_read(tmpctx, REQ_FD);
if (!fromwire_onchain_init(ctx, msg,
&seed, &shachain,
&shachain,
&funding_amount_satoshi,
&old_remote_per_commit_point,
&remote_per_commit_point,
@@ -2139,6 +2150,7 @@ int main(int argc, char *argv[])
&scriptpubkey[REMOTE],
&our_wallet_pubkey,
&funder,
&basepoints[LOCAL],
&basepoints[REMOTE],
&tx,
&tx_blockheight,
@@ -2150,7 +2162,6 @@ int main(int argc, char *argv[])
master_badmsg(WIRE_ONCHAIN_INIT, msg);
}
derive_basepoints(&seed, NULL, &basepoints[LOCAL], NULL, &shaseed);
bitcoin_txid(tx, &txid);
/* FIXME: Filter as we go, don't load them all into mem! */
@@ -2215,7 +2226,6 @@ int main(int argc, char *argv[])
if (is_local_commitment(&txid, &our_broadcast_txid))
handle_our_unilateral(tx, tx_blockheight, &txid,
&shaseed,
basepoints,
htlcs,
tell_if_missing, tell_immediately,

2
onchaind/onchain_wire.csv
View File

@@ -3,7 +3,6 @@
# Begin! Here's the onchain tx which spends funding tx, followed by all HTLCs.
onchain_init,5001
onchain_init,,seed,struct secret
onchain_init,,shachain,struct shachain
onchain_init,,funding_amount_satoshi,u64
# Remote per commit point for committed tx.
@@ -23,6 +22,7 @@ onchain_init,,remote_scriptpubkey,remote_scriptpubkey_len*u8
onchain_init,,ourwallet_pubkey,struct pubkey
# We need these two for commit number obscurer
onchain_init,,funder,enum side
onchain_init,,local_basepoints,struct basepoints
onchain_init,,remote_basepoints,struct basepoints
onchain_init,,tx,struct bitcoin_tx
onchain_init,,tx_blockheight,u32
1 #include <common/derive_basepoints.h>
3 # Begin! Here's the onchain tx which spends funding tx, followed by all HTLCs.
4 onchain_init,5001
5 onchain_init,,seed,struct secret onchain_init,,shachain,struct shachain
onchain_init,,shachain,struct shachain
6 onchain_init,,funding_amount_satoshi,u64
7 # Remote per commit point for committed tx.
8 onchain_init,,old_remote_per_commitment_point,struct pubkey
22 # We need these two for commit number obscurer
23 onchain_init,,funder,enum side
24 onchain_init,,remote_basepoints,struct basepoints onchain_init,,local_basepoints,struct basepoints
25 onchain_init,,remote_basepoints,struct basepoints
26 onchain_init,,tx,struct bitcoin_tx
27 onchain_init,,tx_blockheight,u32
28 onchain_init,,reasonable_depth,u32

20
onchaind/test/run-grind_feerate.c
View File

@@ -18,19 +18,15 @@ u64 commit_number_obscurer(const struct pubkey *opener_payment_basepoint UNNEEDE
/* Generated stub for daemon_shutdown */
void daemon_shutdown(void)
{ fprintf(stderr, "daemon_shutdown called!\n"); abort(); }
/* Generated stub for derive_basepoints */
bool derive_basepoints(const struct secret *seed UNNEEDED,
struct pubkey *funding_pubkey UNNEEDED,
struct basepoints *basepoints UNNEEDED,
struct secrets *secrets UNNEEDED,
struct sha256 *shaseed UNNEEDED)
{ fprintf(stderr, "derive_basepoints called!\n"); abort(); }
/* Generated stub for derive_keyset */
bool derive_keyset(const struct pubkey *per_commitment_point UNNEEDED,
const struct basepoints *self UNNEEDED,
const struct basepoints *other UNNEEDED,
struct keyset *keyset UNNEEDED)
{ fprintf(stderr, "derive_keyset called!\n"); abort(); }
/* Generated stub for fromwire_hsm_get_per_commitment_point_reply */
bool fromwire_hsm_get_per_commitment_point_reply(const tal_t *ctx UNNEEDED, const void *p UNNEEDED, struct pubkey *per_commitment_point UNNEEDED, struct secret **old_commitment_secret UNNEEDED)
{ fprintf(stderr, "fromwire_hsm_get_per_commitment_point_reply called!\n"); abort(); }
/* Generated stub for fromwire_hsm_sign_tx_reply */
bool fromwire_hsm_sign_tx_reply(const void *p UNNEEDED, secp256k1_ecdsa_signature *sig UNNEEDED)
{ fprintf(stderr, "fromwire_hsm_sign_tx_reply called!\n"); abort(); }
@@ -41,7 +37,7 @@ bool fromwire_onchain_depth(const void *p UNNEEDED, struct bitcoin_txid *txid UN
bool fromwire_onchain_htlc(const void *p UNNEEDED, struct htlc_stub *htlc UNNEEDED, bool *tell_if_missing UNNEEDED, bool *tell_immediately UNNEEDED)
{ fprintf(stderr, "fromwire_onchain_htlc called!\n"); abort(); }
/* Generated stub for fromwire_onchain_init */
bool fromwire_onchain_init(const tal_t *ctx UNNEEDED, const void *p UNNEEDED, struct secret *seed UNNEEDED, struct shachain *shachain UNNEEDED, u64 *funding_amount_satoshi UNNEEDED, struct pubkey *old_remote_per_commitment_point UNNEEDED, struct pubkey *remote_per_commitment_point UNNEEDED, u32 *local_to_self_delay UNNEEDED, u32 *remote_to_self_delay UNNEEDED, u32 *feerate_per_kw UNNEEDED, u64 *local_dust_limit_satoshi UNNEEDED, struct bitcoin_txid *our_broadcast_txid UNNEEDED, u8 **local_scriptpubkey UNNEEDED, u8 **remote_scriptpubkey UNNEEDED, struct pubkey *ourwallet_pubkey UNNEEDED, enum side *funder UNNEEDED, struct basepoints *remote_basepoints UNNEEDED, struct bitcoin_tx **tx UNNEEDED, u32 *tx_blockheight UNNEEDED, u32 *reasonable_depth UNNEEDED, secp256k1_ecdsa_signature **htlc_signature UNNEEDED, u64 *num_htlcs UNNEEDED, u32 *min_possible_feerate UNNEEDED, u32 *max_possible_feerate UNNEEDED)
bool fromwire_onchain_init(const tal_t *ctx UNNEEDED, const void *p UNNEEDED, struct shachain *shachain UNNEEDED, u64 *funding_amount_satoshi UNNEEDED, struct pubkey *old_remote_per_commitment_point UNNEEDED, struct pubkey *remote_per_commitment_point UNNEEDED, u32 *local_to_self_delay UNNEEDED, u32 *remote_to_self_delay UNNEEDED, u32 *feerate_per_kw UNNEEDED, u64 *local_dust_limit_satoshi UNNEEDED, struct bitcoin_txid *our_broadcast_txid UNNEEDED, u8 **local_scriptpubkey UNNEEDED, u8 **remote_scriptpubkey UNNEEDED, struct pubkey *ourwallet_pubkey UNNEEDED, enum side *funder UNNEEDED, struct basepoints *local_basepoints UNNEEDED, struct basepoints *remote_basepoints UNNEEDED, struct bitcoin_tx **tx UNNEEDED, u32 *tx_blockheight UNNEEDED, u32 *reasonable_depth UNNEEDED, secp256k1_ecdsa_signature **htlc_signature UNNEEDED, u64 *num_htlcs UNNEEDED, u32 *min_possible_feerate UNNEEDED, u32 *max_possible_feerate UNNEEDED)
{ fprintf(stderr, "fromwire_onchain_init called!\n"); abort(); }
/* Generated stub for fromwire_onchain_known_preimage */
bool fromwire_onchain_known_preimage(const void *p UNNEEDED, struct preimage *preimage UNNEEDED)
@@ -85,11 +81,6 @@ void master_badmsg(u32 type_expected UNNEEDED, const u8 *msg)
/* Generated stub for peer_billboard */
void peer_billboard(bool perm UNNEEDED, const char *fmt UNNEEDED, ...)
{ fprintf(stderr, "peer_billboard called!\n"); abort(); }
/* Generated stub for per_commit_point */
bool per_commit_point(const struct sha256 *shaseed UNNEEDED,
struct pubkey *commit_point UNNEEDED,
u64 per_commit_index UNNEEDED)
{ fprintf(stderr, "per_commit_point called!\n"); abort(); }
/* Generated stub for status_failed */
void status_failed(enum status_failreason code UNNEEDED,
const char *fmt UNNEEDED, ...)
@@ -109,6 +100,9 @@ u8 *to_self_wscript(const tal_t *ctx UNNEEDED,
u16 to_self_delay UNNEEDED,
const struct keyset *keyset UNNEEDED)
{ fprintf(stderr, "to_self_wscript called!\n"); abort(); }
/* Generated stub for towire_hsm_get_per_commitment_point */
u8 *towire_hsm_get_per_commitment_point(const tal_t *ctx UNNEEDED, u64 n UNNEEDED)
{ fprintf(stderr, "towire_hsm_get_per_commitment_point called!\n"); abort(); }
/* Generated stub for towire_hsm_sign_delayed_payment_to_us */
u8 *towire_hsm_sign_delayed_payment_to_us(const tal_t *ctx UNNEEDED, u64 commit_num UNNEEDED, const struct bitcoin_tx *tx UNNEEDED, const u8 *wscript UNNEEDED, u64 input_amount UNNEEDED)
{ fprintf(stderr, "towire_hsm_sign_delayed_payment_to_us called!\n"); abort(); }