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onchaind: Add a level of indirection to txwatches and txowatches

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This will allow us in the next commit to store the transactions that triggered
this event in the DB and thus allowing us to replay them later on.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2018-04-16 13:20:45 +02:00
parent 876d698f3c
commit 5e505e9c53
4 changed files with 59 additions and 25 deletions
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52
lightningd/onchain_control.c
View File

@ -9,7 +9,6 @@
#include <lightningd/peer_control.h>
#include <lightningd/subd.h>
#include <lightningd/watch.h>
#include <onchaind/gen_onchain_wire.h>
#include <onchaind/onchain_wire.h>
/* We dump all the known preimages when onchaind starts up. */
@ -53,12 +52,25 @@ static void handle_onchain_init_reply(struct channel *channel, const u8 *msg UNU
channel_set_state(channel, FUNDING_SPEND_SEEN, ONCHAIN);
}
/**
* Notify onchaind about the depth change of the watched tx.
*/
static void onchain_tx_depth(struct channel *channel,
const struct bitcoin_txid *txid,
unsigned int depth)
{
u8 *msg;
msg = towire_onchain_depth(channel, txid, depth);
subd_send_msg(channel->owner, take(msg));
}
/**
* Entrypoint for the txwatch callback, calls onchain_tx_depth.
*/
static enum watch_result onchain_tx_watched(struct channel *channel,
const struct bitcoin_txid *txid,
unsigned int depth)
{
u8 *msg;
if (depth == 0) {
log_unusual(channel->log, "Chain reorganization!");
channel_set_owner(channel, NULL);
@ -71,26 +83,37 @@ static enum watch_result onchain_tx_watched(struct channel *channel,
return KEEP_WATCHING;
}
msg = towire_onchain_depth(channel, txid, depth);
subd_send_msg(channel->owner, take(msg));
onchain_tx_depth(channel, txid, depth);
return KEEP_WATCHING;
}
static void watch_tx_and_outputs(struct channel *channel,
const struct bitcoin_tx *tx);
static enum watch_result onchain_txo_watched(struct channel *channel,
const struct bitcoin_tx *tx,
size_t input_num,
const struct block *block)
/**
* Notify onchaind that an output was spent and register new watches.
*/
static void onchain_txo_spent(struct channel *channel, const struct bitcoin_tx *tx, size_t input_num, u32 blockheight)
{
u8 *msg;
watch_tx_and_outputs(channel, tx);
msg = towire_onchain_spent(channel, tx, input_num, block->height);
msg = towire_onchain_spent(channel, tx, input_num, blockheight);
subd_send_msg(channel->owner, take(msg));
}
/**
* Entrypoint for the txowatch callback, stores tx and calls onchain_txo_spent.
*/
static enum watch_result onchain_txo_watched(struct channel *channel,
const struct bitcoin_tx *tx,
size_t input_num,
const struct block *block)
{
onchain_txo_spent(channel, tx, input_num, block->height);
/* We don't need to keep watching: If this output is double-spent
* (reorg), we'll get a zero depth cb to onchain_tx_watched, and
* restart onchaind. */
@ -335,10 +358,9 @@ static void onchain_error(struct channel *channel,
/* With a reorg, this can get called multiple times; each time we'll kill
* onchaind (like any other owner), and restart */
enum watch_result funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
size_t input_num UNUSED,
const struct block *block)
enum watch_result onchaind_funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
u32 blockheight)
{
u8 *msg;
struct bitcoin_txid our_last_txid;
@ -408,7 +430,7 @@ enum watch_result funding_spent(struct channel *channel,
&channel->channel_info.theirbase.htlc,
&channel->channel_info.theirbase.delayed_payment,
tx,
block->height,
blockheight,
/* FIXME: config for 'reasonable depth' */
3,
channel->last_htlc_sigs,

7
lightningd/onchain_control.h
View File

@ -7,9 +7,8 @@ struct channel;
struct bitcoin_tx;
struct block;
enum watch_result funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
size_t input_num,
const struct block *block);
enum watch_result onchaind_funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
u32 blockheight);
#endif /* LIGHTNING_LIGHTNINGD_ONCHAIN_CONTROL_H */

14
lightningd/peer_control.c
View File

@ -692,6 +692,20 @@ static enum watch_result funding_lockin_cb(struct channel *channel,
return DELETE_WATCH;
}
static enum watch_result funding_spent(struct channel *channel,
const struct bitcoin_tx *tx,
size_t inputnum UNUSED,
const struct block *block)
{
struct bitcoin_txid txid;
bitcoin_txid(tx, &txid);
wallet_channeltxs_add(channel->peer->ld->wallet, channel,
WIRE_ONCHAIN_INIT, &txid, 0, block->height);
return onchaind_funding_spent(channel, tx, block->height);
}
void channel_watch_funding(struct lightningd *ld, struct channel *channel)
{
/* FIXME: Remove arg from cb? */

11
wallet/test/run-wallet.c
View File

@ -90,12 +90,6 @@ bool fromwire_gossip_getpeers_reply(const tal_t *ctx UNNEEDED, const void *p UNN
/* Generated stub for fromwire_gossip_peer_connected */
bool fromwire_gossip_peer_connected(const tal_t *ctx UNNEEDED, const void *p UNNEEDED, struct pubkey *id UNNEEDED, struct wireaddr *addr UNNEEDED, struct crypto_state *crypto_state UNNEEDED, u64 *gossip_index UNNEEDED, u8 **gfeatures UNNEEDED, u8 **lfeatures UNNEEDED)
{ fprintf(stderr, "fromwire_gossip_peer_connected called!\n"); abort(); }
/* Generated stub for funding_spent */
enum watch_result funding_spent(struct channel *channel UNNEEDED,
const struct bitcoin_tx *tx UNNEEDED,
size_t input_num UNNEEDED,
const struct block *block UNNEEDED)
{ fprintf(stderr, "funding_spent called!\n"); abort(); }
/* Generated stub for get_feerate */
u32 get_feerate(const struct chain_topology *topo UNNEEDED, enum feerate feerate UNNEEDED)
{ fprintf(stderr, "get_feerate called!\n"); abort(); }
@ -296,6 +290,11 @@ struct json_result *new_json_result(const tal_t *ctx UNNEEDED)
/* Generated stub for null_response */
struct json_result *null_response(const tal_t *ctx UNNEEDED)
{ fprintf(stderr, "null_response called!\n"); abort(); }
/* Generated stub for onchaind_funding_spent */
enum watch_result onchaind_funding_spent(struct channel *channel UNNEEDED,
const struct bitcoin_tx *tx UNNEEDED,
u32 blockheight UNNEEDED)
{ fprintf(stderr, "onchaind_funding_spent called!\n"); abort(); }
/* Generated stub for outpointfilter_add */
void outpointfilter_add(struct outpointfilter *of UNNEEDED,
const struct bitcoin_txid *txid UNNEEDED, const u32 outnum UNNEEDED)