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topology: Add transaction filtering to connect_block

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The filter is being populated while initializing the daemon and by
adding new keys as they are being generated. The filter is then used
in connect_block to identify transactions of interest.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker
2017-11-27 16:20:10 +01:00
parent 1eb3c9d2b3
commit c29923a623
5 changed files with 45 additions and 10 deletions
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34
lightningd/lightningd.c
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@@ -213,6 +213,20 @@ struct chainparams *get_chainparams(const struct lightningd *ld)
ld->topology->bitcoind->chainparams);
}
static void init_txfilter(struct wallet *w, struct txfilter *filter)
{
struct ext_key ext;
u64 bip32_max_index;
bip32_max_index = db_get_intvar(w->db, "bip32_max_index", 0);
for (u64 i = 0; i <= bip32_max_index; i++) {
if (bip32_key_from_parent(w->bip32_base, i, BIP32_FLAG_KEY_PUBLIC, &ext) != WALLY_OK) {
abort();
}
txfilter_add_derkey(filter, ext.pub_key);
}
}
int main(int argc, char *argv[])
{
struct log_book *log_book;
@@ -253,6 +267,7 @@ int main(int argc, char *argv[])
/* Initialize wallet, now that we are in the correct directory */
ld->wallet = wallet_new(ld, ld->log);
ld->owned_txfilter = txfilter_new(ld);
/* Set up HSM. */
hsm_init(ld, newdir);
@@ -260,17 +275,13 @@ int main(int argc, char *argv[])
/* Now we know our ID, we can set our color/alias if not already. */
setup_color_and_alias(ld);
/* Initialize block topology (does its own transaction) */
setup_topology(ld->topology,
&ld->timers,
ld->config.poll_time,
/* FIXME: Load from peers. */
0);
/* Everything is within a transaction. */
db_begin_transaction(ld->wallet->db);
/* Load invoices from the database */
/* Initialize the transaction filter with our pubkeys. */
init_txfilter(ld->wallet, ld->owned_txfilter);
/* Load invoices from the database */
if (!wallet_invoices_load(ld->wallet, ld->invoices)) {
fatal("Could not load invoices from the database");
}
@@ -298,6 +309,13 @@ int main(int argc, char *argv[])
db_commit_transaction(ld->wallet->db);
/* Initialize block topology (does its own transaction) */
setup_topology(ld->topology,
&ld->timers,
ld->config.poll_time,
/* FIXME: Load from peers. */
0);
/* Create RPC socket (if any) */
setup_jsonrpc(ld, ld->rpc_filename);