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musig: update to BIP v0.8 "Switch from X-only to plain pk inputs."

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Jonas Nick
2022-12-20 16:59:12 +00:00
parent 304f1bc96d
commit d717a4980b
8 changed files with 113 additions and 103 deletions
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src/modules/musig/musig.md
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@@ -30,8 +30,8 @@ A (Taproot) tweak can be added to the resulting public key with `secp256k1_xonly
This is covered by `examples/musig.c`.
Essentially, the protocol proceeds in the following steps:
1. Generate a keypair with `secp256k1_keypair_create` and obtain the xonly public key with `secp256k1_keypair_xonly_pub`.
2. Call `secp256k1_musig_pubkey_agg` with the xonly pubkeys of all participants.
1. Generate a keypair with `secp256k1_keypair_create` and obtain the public key with `secp256k1_keypair_pub`.
2. Call `secp256k1_musig_pubkey_agg` with the pubkeys of all participants.
3. Optionally add a (Taproot) tweak with `secp256k1_musig_pubkey_xonly_tweak_add` and a plain tweak with `secp256k1_musig_pubkey_ec_tweak_add`.
4. Generate a pair of secret and public nonce with `secp256k1_musig_nonce_gen` and send the public nonce to the other signers.
5. Someone (not necessarily the signer) aggregates the public nonce with `secp256k1_musig_nonce_agg` and sends it to the signers.