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musig: add pubkey_get to obtain a full pubkey from a keyagg_cache

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Jonas Nick
2021-10-25 21:57:30 +00:00
parent 21e2d65b79
commit c519b46879
3 changed files with 42 additions and 0 deletions
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14
src/modules/musig/keyagg_impl.h
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@@ -244,6 +244,20 @@ int secp256k1_musig_pubkey_agg(const secp256k1_context* ctx, secp256k1_scratch_s
return 1;
}
int secp256k1_musig_pubkey_get(const secp256k1_context* ctx, secp256k1_pubkey *agg_pk, secp256k1_musig_keyagg_cache *keyagg_cache) {
secp256k1_keyagg_cache_internal cache_i;
VERIFY_CHECK(ctx != NULL);
ARG_CHECK(agg_pk != NULL);
memset(agg_pk, 0, sizeof(*agg_pk));
ARG_CHECK(keyagg_cache != NULL);
if(!secp256k1_keyagg_cache_load(ctx, &cache_i, keyagg_cache)) {
return 0;
}
secp256k1_pubkey_save(agg_pk, &cache_i.pk);
return 1;
}
int secp256k1_musig_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_pubkey *output_pubkey, secp256k1_musig_keyagg_cache *keyagg_cache, const unsigned char *tweak32) {
secp256k1_keyagg_cache_internal cache_i;
int overflow = 0;