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Add MuSig Key Aggregation spec#120

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jonasnick merged 12 commits intoBlockstreamResearch:masterBlockstreamResearch/secp256k1-zkp:masterfrom jonasnick:musig-specjonasnick/secp256k1-zkp:musig-specCopy head branch name to clipboardJul 18, 2021

+761-124

Commits

Commits on Jul 14, 2021

• extrakeys: add hsort, in-place, iterative heapsort

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• extrakeys: add xonly_sort function

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• musig: add static test vectors for key aggregation

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• musig: compute musig coefficient by hashing key instead of index

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• musig: optimize key aggregation using const 1 for 2nd key

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• musig: rename Musig coefficient to KeyAgg coefficient

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• musig: add key aggregation spec draft

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• musig: change pubkey_combine arg to array of pointers to pks

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• musig: improve test coverage of pubkey_combine

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• musig: do not also require schnorrsig module config flag

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• musig: remove unnecessary branch in pubkey_tweak_add

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• musig: remove unnecessary constant time normalize in combine

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