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multi: use key locator for lnwallet.MessageSigner

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To simplify the message signing API even further, we refactor the
lnwallet.MessageSigner interface to use a key locator instead of the
public key to identify which key should be signed with.
This commit is contained in:
Oliver Gugger
2021-09-23 16:54:30 +02:00
parent afa03f22cc
commit e79d59dd4c
19 changed files with 184 additions and 102 deletions
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4
keychain/derivation.go
View File

@ -211,6 +211,10 @@ type SingleKeyMessageSigner interface {
// PubKey returns the public key of the wrapped private key.
PubKey() *btcec.PublicKey
// KeyLocator returns the locator that describes the wrapped private
// key.
KeyLocator() KeyLocator
// SignMessage signs the given message, single or double SHA256 hashing
// it first, with the wrapped private key.
SignMessage(message []byte, doubleHash bool) (*btcec.Signature, error)

26
keychain/signer.go
View File

@ -25,6 +25,10 @@ func (p *PubKeyMessageSigner) PubKey() *btcec.PublicKey {
return p.pubKey
}
func (p *PubKeyMessageSigner) KeyLocator() KeyLocator {
return p.keyLoc
}
func (p *PubKeyMessageSigner) SignMessage(message []byte,
doubleHash bool) (*btcec.Signature, error) {
@ -37,12 +41,26 @@ func (p *PubKeyMessageSigner) SignMessageCompact(msg []byte,
return p.digestSigner.SignMessageCompact(p.keyLoc, msg, doubleHash)
}
func NewPrivKeyMessageSigner(privKey *btcec.PrivateKey,
keyLoc KeyLocator) *PrivKeyMessageSigner {
return &PrivKeyMessageSigner{
privKey: privKey,
keyLoc: keyLoc,
}
}
type PrivKeyMessageSigner struct {
PrivKey *btcec.PrivateKey
keyLoc KeyLocator
privKey *btcec.PrivateKey
}
func (p *PrivKeyMessageSigner) PubKey() *btcec.PublicKey {
return p.PrivKey.PubKey()
return p.privKey.PubKey()
}
func (p *PrivKeyMessageSigner) KeyLocator() KeyLocator {
return p.keyLoc
}
func (p *PrivKeyMessageSigner) SignMessage(msg []byte,
@ -54,7 +72,7 @@ func (p *PrivKeyMessageSigner) SignMessage(msg []byte,
} else {
digest = chainhash.HashB(msg)
}
return p.PrivKey.Sign(digest)
return p.privKey.Sign(digest)
}
func (p *PrivKeyMessageSigner) SignMessageCompact(msg []byte,
@ -66,7 +84,7 @@ func (p *PrivKeyMessageSigner) SignMessageCompact(msg []byte,
} else {
digest = chainhash.HashB(msg)
}
return btcec.SignCompact(btcec.S256(), p.PrivKey, digest, true)
return btcec.SignCompact(btcec.S256(), p.privKey, digest, true)
}
var _ SingleKeyMessageSigner = (*PubKeyMessageSigner)(nil)