davide/palladum-lightning
1
0
Fork 0
Code Issues Pull Requests Actions 5 Packages Projects Releases Wiki Activity

devtools/gossmap-compress: create latest gossip_store version

Browse Source 
This saves gossipd from converting it:

```
lightningd-1 2026-02-02T00:50:49.505Z DEBUG   gossipd: Time to convert version 14 store: 890 msec
```

Reducing node startup time from 1.4 seconds to 0.5 seconds.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell
2026-02-12 09:23:10 +10:30
parent 445bcd040a
commit facf24b6ee
1 changed files with 14 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
devtools/gossmap-compress.c
View File

@@ -79,7 +79,7 @@ static unsigned int verbose = 0;
#define GC_HEADER "GOSSMAP_COMPRESSv1"
#define GC_HEADERLEN (sizeof(GC_HEADER))
#define GOSSIP_STORE_VER ((0 << 5) | 14)
#define GOSSIP_STORE_VER ((0 << 5) | 16)
/* Backwards, we want larger first */
static int cmp_node_num_chans(struct gossmap_node *const *a,
@@ -295,7 +295,7 @@ static void write_msg_to_gstore(int outfd, const u8 *msg TAKES)
{
struct gossip_hdr hdr;
hdr.flags = 0;
hdr.flags = CPU_TO_BE16(GOSSIP_STORE_COMPLETED_BIT);
hdr.len = cpu_to_be16(tal_bytelen(msg));
hdr.timestamp = 0;
hdr.crc = cpu_to_be32(crc32c(0, msg, tal_bytelen(msg)));
@@ -513,6 +513,17 @@ static const char *get_alias(const tal_t *ctx,
return tal_strndup(ctx, (const char *)alias, 32);
}
static void write_uuid(int outfd)
{
const u8 uuid[] = {
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0
};
write_msg_to_gstore(outfd, take(towire_gossip_store_uuid(NULL, uuid)));
}
int main(int argc, char *argv[])
{
int outfd;
@@ -791,6 +802,7 @@ int main(int argc, char *argv[])
/* Now write out gossmap */
if (write(outfd, &version, 1) != 1)
err(1, "Failed to write output");
write_uuid(outfd);
for (size_t i = 0; i < channel_count; i++) {
write_announce(outfd,
chans[i].node1,