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musig: remove unnecessary branch in pubkey_tweak_add

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This commit is contained in:
Jonas Nick 2021-05-12 17:52:32 +00:00
parent 5860b5e0fe
commit 48f63efe68
1 changed files with 5 additions and 3 deletions
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8
src/modules/musig/main_impl.h
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@ -152,6 +152,7 @@ int secp256k1_musig_pubkey_combine(const secp256k1_context* ctx, secp256k1_scrat
int secp256k1_musig_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_musig_pre_session *pre_session, secp256k1_pubkey *output_pubkey, const secp256k1_xonly_pubkey *internal_pubkey, const unsigned char *tweak32) { int secp256k1_musig_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_musig_pre_session *pre_session, secp256k1_pubkey *output_pubkey, const secp256k1_xonly_pubkey *internal_pubkey, const unsigned char *tweak32) {
secp256k1_ge pk; secp256k1_ge pk;
int ret;
VERIFY_CHECK(ctx != NULL); VERIFY_CHECK(ctx != NULL);
ARG_CHECK(pre_session != NULL); ARG_CHECK(pre_session != NULL);
@ -168,9 +169,10 @@ int secp256k1_musig_pubkey_tweak_add(const secp256k1_context* ctx, secp256k1_mus
memcpy(pre_session->tweak, tweak32, 32); memcpy(pre_session->tweak, tweak32, 32);
pre_session->is_tweaked = 1; pre_session->is_tweaked = 1;
if (!secp256k1_pubkey_load(ctx, &pk, output_pubkey)) { ret = secp256k1_pubkey_load(ctx, &pk, output_pubkey);
return 0; /* Successful xonly_pubkey_tweak_add always returns valid output_pubkey */
} VERIFY_CHECK(ret);
pre_session->pk_parity = secp256k1_extrakeys_ge_even_y(&pk); pre_session->pk_parity = secp256k1_extrakeys_ge_even_y(&pk);
return 1; return 1;
} }