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#include <assert.h>
#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>
#include <wire/wire.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));
}
WARN_UNUSED_RESULT
bool pubkey32_from_node_id(struct pubkey32 *key, const struct node_id *id)
{
struct pubkey k;
if (!pubkey_from_node_id(&k, id))
return false;
return secp256k1_xonly_pubkey_from_pubkey(secp256k1_ctx, &key->pubkey,
NULL, &k.pubkey) == 1;
}
/* 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));
}
void fromwire_node_id(const u8 **cursor, size_t *max, struct node_id *id)
{
fromwire(cursor, max, &id->k, sizeof(id->k));
}
void towire_node_id(u8 **pptr, const struct node_id *id)
{
/* Cheap sanity check */
assert(id->k[0] == 0x2 || id->k[0] == 0x3);
towire(pptr, id->k, sizeof(id->k));
}