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Add tweak32 parameter to musig_partial_sig_combine which allows to sign for p2c/taproot commitments

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This commit is contained in:
Jonas Nick
2019-06-22 18:21:22 +00:00
committed by Tim Ruffing
parent a4410ac779
commit d924027765
4 changed files with 135 additions and 14 deletions
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9
include/secp256k1_musig.h
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@@ -366,13 +366,20 @@ SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_musig_partial_sig_verif
* Out: sig: complete signature (cannot be NULL)
* In: partial_sigs: array of partial signatures to combine (cannot be NULL)
* n_sigs: number of signatures in the partial_sigs array
* tweak32: if `combined_pk` was tweaked with `ec_pubkey_tweak_add` after
* `musig_pubkey_combine` and before `musig_session_initialize` then
* the same tweak must be provided here in order to get a valid
* signature for the tweaked key. Otherwise `tweak` should be NULL.
* If the tweak is larger than the group order or 0 this function will
* return 0. (can be NULL)
*/
SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_musig_partial_sig_combine(
const secp256k1_context* ctx,
const secp256k1_musig_session *session,
secp256k1_schnorrsig *sig,
const secp256k1_musig_partial_signature *partial_sigs,
size_t n_sigs
size_t n_sigs,
const unsigned char *tweak32
) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4);
/** Converts a partial signature to an adaptor signature by adding a given secret