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32 lines
1.3 KiB
C++
32 lines
1.3 KiB
C++
// Copyright (c) 2024-present The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or https://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_MUSIG_H
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#define BITCOIN_MUSIG_H
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#include <pubkey.h>
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#include <optional>
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#include <vector>
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struct secp256k1_musig_keyagg_cache;
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//! MuSig2 chaincode as defined by BIP 328
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using namespace util::hex_literals;
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constexpr uint256 MUSIG_CHAINCODE{
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// Use immediate lambda to work around GCC-14 bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117966
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[]() consteval { return uint256{"868087ca02a6f974c4598924c36b57762d32cb45717167e300622c7167e38965"_hex_u8}; }(),
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};
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//! Create a secp256k1_musig_keyagg_cache from the pubkeys in their current order. This is necessary for most MuSig2 operations
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bool GetMuSig2KeyAggCache(const std::vector<CPubKey>& pubkeys, secp256k1_musig_keyagg_cache& keyagg_cache);
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//! Retrieve the full aggregate pubkey from the secp256k1_musig_keyagg_cache
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std::optional<CPubKey> GetCPubKeyFromMuSig2KeyAggCache(secp256k1_musig_keyagg_cache& cache);
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//! Compute the full aggregate pubkey from the given participant pubkeys in their current order
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std::optional<CPubKey> MuSig2AggregatePubkeys(const std::vector<CPubKey>& pubkeys);
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#endif // BITCOIN_MUSIG_H
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