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input+wallet: extract musig2 session management into new module

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In this commit, we extract the musig2 session management into a new
module. This allows us to re-use the session logic elsewhere in unit
tests so we don't need to instantiate the entire wallet.
This commit is contained in:
Olaoluwa Osuntokun
2023-01-18 19:29:41 -08:00
parent 4733da5ccb
commit 9a65806c09
13 changed files with 402 additions and 371 deletions
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34
input/musig2.go
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@@ -48,9 +48,13 @@ type MuSig2Signer interface {
// public key of the local signing key. If nonces of other parties are
// already known, they can be submitted as well to reduce the number of
// method calls necessary later on.
//
// The set of sessionOpts are _optional_ and allow a caller to modify
// the generated sessions. As an example the local nonce might already
// be generated ahead of time.
MuSig2CreateSession(MuSig2Version, keychain.KeyLocator,
[]*btcec.PublicKey, *MuSig2Tweaks,
[][musig2.PubNonceSize]byte) (*MuSig2SessionInfo, error)
[]*btcec.PublicKey, *MuSig2Tweaks, [][musig2.PubNonceSize]byte,
...musig2.SessionOption) (*MuSig2SessionInfo, error)
// MuSig2RegisterNonces registers one or more public nonces of other
// signing participants for a session identified by its ID. This method
@@ -374,15 +378,20 @@ func combineKeysV040(allSignerPubKeys []*btcec.PublicKey, sortKeys bool,
// MuSig2CreateContext creates a new MuSig2 signing context.
func MuSig2CreateContext(bipVersion MuSig2Version, privKey *btcec.PrivateKey,
allSignerPubKeys []*btcec.PublicKey,
tweaks *MuSig2Tweaks) (MuSig2Context, MuSig2Session, error) {
allSignerPubKeys []*btcec.PublicKey, tweaks *MuSig2Tweaks,
sessionOpts ...musig2.SessionOption,
) (MuSig2Context, MuSig2Session, error) {
switch bipVersion {
case MuSig2Version040:
return createContextV040(privKey, allSignerPubKeys, tweaks)
return createContextV040(
privKey, allSignerPubKeys, tweaks, sessionOpts...,
)
case MuSig2Version100RC2:
return createContextV100RC2(privKey, allSignerPubKeys, tweaks)
return createContextV100RC2(
privKey, allSignerPubKeys, tweaks, sessionOpts...,
)
default:
return nil, nil, fmt.Errorf("unknown MuSig2 version: <%d>",
@@ -393,8 +402,9 @@ func MuSig2CreateContext(bipVersion MuSig2Version, privKey *btcec.PrivateKey,
// createContextV100RC2 implements the MuSig2CreateContext logic for the MuSig2
// BIP draft version 1.0.0rc2.
func createContextV100RC2(privKey *btcec.PrivateKey,
allSignerPubKeys []*btcec.PublicKey,
tweaks *MuSig2Tweaks) (*musig2.Context, *musig2.Session, error) {
allSignerPubKeys []*btcec.PublicKey, tweaks *MuSig2Tweaks,
sessionOpts ...musig2.SessionOption,
) (*musig2.Context, *musig2.Session, error) {
// The context keeps track of all signing keys and our local key.
allOpts := append(
@@ -409,7 +419,7 @@ func createContextV100RC2(privKey *btcec.PrivateKey,
"context: %v", err)
}
muSigSession, err := muSigContext.NewSession()
muSigSession, err := muSigContext.NewSession(sessionOpts...)
if err != nil {
return nil, nil, fmt.Errorf("error creating MuSig2 signing "+
"session: %v", err)
@@ -421,9 +431,9 @@ func createContextV100RC2(privKey *btcec.PrivateKey,
// createContextV040 implements the MuSig2CreateContext logic for the MuSig2 BIP
// draft version 0.4.0.
func createContextV040(privKey *btcec.PrivateKey,
allSignerPubKeys []*btcec.PublicKey,
tweaks *MuSig2Tweaks) (*musig2v040.Context, *musig2v040.Session,
error) {
allSignerPubKeys []*btcec.PublicKey, tweaks *MuSig2Tweaks,
sessionOpts ...musig2.SessionOption,
) (*musig2v040.Context, *musig2v040.Session, error) {
// The context keeps track of all signing keys and our local key.
allOpts := append(