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Add ordinary tweak info

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Jesse Posner 2022-09-01 22:39:34 -07:00
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src/modules/musig/musig.md
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@ -23,7 +23,7 @@ Therefore, users of the musig module must take great care to make sure of the fo
# Key Aggregation and (Taproot) Tweaking # Key Aggregation and (Taproot) Tweaking
Given a set of public keys, the aggregate public key is computed with `secp256k1_musig_pubkey_agg`. Given a set of public keys, the aggregate public key is computed with `secp256k1_musig_pubkey_agg`.
A (Taproot) tweak can be added to the resulting public key with `secp256k1_xonly_pubkey_tweak_add`. A (Taproot) tweak can be added to the resulting public key with `secp256k1_xonly_pubkey_tweak_add` and an ordinary tweak can be added with `secp256k1_ec_pubkey_tweak_add`.
# Signing # Signing
@ -32,7 +32,7 @@ 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`. 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. 2. Call `secp256k1_musig_pubkey_agg` with the xonly pubkeys of all participants.
3. Optionally add a (Taproot) tweak with `secp256k1_musig_pubkey_xonly_tweak_add`. 3. Optionally add a (Taproot) tweak with `secp256k1_musig_pubkey_xonly_tweak_add` and an ordinary 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. 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. 5. Someone (not necessarily the signer) aggregates the public nonce with `secp256k1_musig_nonce_agg` and sends it to the signers.
6. Process the aggregate nonce with `secp256k1_musig_nonce_process`. 6. Process the aggregate nonce with `secp256k1_musig_nonce_process`.