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watchtower: Call the commitment_revoked hook every time we update

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Changelog-Added: plugin: Added a new `commitment_revocation` hook that provides the plugin with penalty transactions for all revoked transactions.
This commit is contained in:
Christian Decker
2020-05-07 10:24:26 +09:30
committed by Rusty Russell
parent 38bad4cb39
commit d1f8509060
4 changed files with 64 additions and 3 deletions
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51
lightningd/peer_htlcs.c
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@@ -1971,6 +1971,41 @@ void update_per_commit_point(struct channel *channel,
ci->remote_per_commit = *per_commitment_point;
}
struct commitment_revocation_payload {
struct bitcoin_txid commitment_txid;
const struct bitcoin_tx *penalty_tx;
struct wallet *wallet;
u64 channel_id;
u64 commitnum;
};
static void commitment_revocation_hook_serialize(
struct commitment_revocation_payload *payload, struct json_stream *stream)
{
json_add_txid(stream, "commitment_txid", &payload->commitment_txid);
json_add_tx(stream, "penalty_tx", payload->penalty_tx);
}
static void
commitment_revocation_hook_cb(struct commitment_revocation_payload *p STEALS){
wallet_penalty_base_delete(p->wallet, p->channel_id, p->commitnum);
}
static bool
commitment_revocation_hook_deserialize(struct commitment_revocation_payload *p,
const char *buffer,
const jsmntok_t *toks)
{
return true;
}
REGISTER_PLUGIN_HOOK(commitment_revocation,
commitment_revocation_hook_deserialize,
commitment_revocation_hook_cb,
commitment_revocation_hook_serialize,
struct commitment_revocation_payload *);
void peer_got_revoke(struct channel *channel, const u8 *msg)
{
u64 revokenum;
@@ -1983,13 +2018,16 @@ void peer_got_revoke(struct channel *channel, const u8 *msg)
struct lightningd *ld = channel->peer->ld;
struct fee_states *fee_states;
struct penalty_base *pbase;
struct commitment_revocation_payload *payload;
struct bitcoin_tx *penalty_tx;
if (!fromwire_channel_got_revoke(msg, msg,
&revokenum, &per_commitment_secret,
&next_per_commitment_point,
&fee_states,
&changed,
&pbase)
&pbase,
&penalty_tx)
|| !fee_states_valid(fee_states, channel->opener)) {
channel_internal_error(channel, "bad fromwire_channel_got_revoke %s",
tal_hex(channel, msg));
@@ -2082,6 +2120,17 @@ void peer_got_revoke(struct channel *channel, const u8 *msg)
: fromwire_peektype(failmsgs[i]));
}
wallet_channel_save(ld->wallet, channel);
if (penalty_tx == NULL)
return;
payload = tal(tmpctx, struct commitment_revocation_payload);
payload->commitment_txid = pbase->txid;
payload->penalty_tx = tal_steal(payload, penalty_tx);
payload->wallet = ld->wallet;
payload->channel_id = channel->dbid;
payload->commitnum = pbase->commitment_num;
plugin_hook_call_commitment_revocation(ld, payload);
}