mirror of
https://github.com/ElementsProject/lightning.git
synced 2024-11-19 18:11:28 +01:00
b4455d517c
Node ids are pubkeys, but we only use them as pubkeys for routing and checking gossip messages. So we're packing and unpacking them constantly, and wasting some space and time. This introduces a new type, explicitly the SEC1 compressed encoding (33 bytes). We ensure its validity when we load from the db, or get it from JSON. We still use 'struct pubkey' for peer messages, which checks validity. Results from 5 runs, min-max(mean +/- stddev): store_load_msec,vsz_kb,store_rewrite_sec,listnodes_sec,listchannels_sec,routing_sec,peer_write_all_sec 39475-39572(39518+/-36),2880732,41.150000-41.390000(41.298+/-0.085),2.260000-2.550000(2.336+/-0.11),44.390000-65.150000(58.648+/-7.5),32.740000-33.020000(32.89+/-0.093),44.130000-45.090000(44.566+/-0.32) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
#include <ccan/array_size/array_size.h>
|
|
#include <ccan/mem/mem.h>
|
|
#include <ccan/str/hex/hex.h>
|
|
#include <common/node_id.h>
|
|
#include <common/type_to_string.h>
|
|
#include <common/utils.h>
|
|
|
|
/* Convert from pubkey to compressed pubkey. */
|
|
void node_id_from_pubkey(struct node_id *id, const struct pubkey *key)
|
|
{
|
|
size_t outlen = ARRAY_SIZE(id->k);
|
|
if (!secp256k1_ec_pubkey_serialize(secp256k1_ctx, id->k, &outlen,
|
|
&key->pubkey,
|
|
SECP256K1_EC_COMPRESSED))
|
|
abort();
|
|
}
|
|
|
|
WARN_UNUSED_RESULT
|
|
bool pubkey_from_node_id(struct pubkey *key, const struct node_id *id)
|
|
{
|
|
return secp256k1_ec_pubkey_parse(secp256k1_ctx, &key->pubkey,
|
|
memcheck(id->k, sizeof(id->k)),
|
|
sizeof(id->k));
|
|
}
|
|
|
|
/* It's valid if we can convert to a real pubkey. */
|
|
bool node_id_valid(const struct node_id *id)
|
|
{
|
|
struct pubkey key;
|
|
return pubkey_from_node_id(&key, id);
|
|
}
|
|
|
|
/* Convert to hex string of SEC1 encoding */
|
|
char *node_id_to_hexstr(const tal_t *ctx, const struct node_id *id)
|
|
{
|
|
return tal_hexstr(ctx, id->k, sizeof(id->k));
|
|
}
|
|
REGISTER_TYPE_TO_STRING(node_id, node_id_to_hexstr);
|
|
|
|
/* Convert from hex string of SEC1 encoding */
|
|
bool node_id_from_hexstr(const char *str, size_t slen, struct node_id *id)
|
|
{
|
|
return hex_decode(str, slen, id->k, sizeof(id->k))
|
|
&& node_id_valid(id);
|
|
}
|
|
|
|
int node_id_cmp(const struct node_id *a, const struct node_id *b)
|
|
{
|
|
return memcmp(a->k, b->k, sizeof(a->k));
|
|
}
|