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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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13
netann/node_signer.go
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@@ -4,7 +4,6 @@ import (
"fmt"
"github.com/btcsuite/btcd/btcec"
"github.com/lightningnetwork/lnd/input"
"github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lnwallet"
)
@@ -24,15 +23,15 @@ func NewNodeSigner(keySigner keychain.SingleKeyMessageSigner) *NodeSigner {
}
// SignMessage signs a double-sha256 digest of the passed msg under the
// resident node's private key. If the target public key is _not_ the node's
// private key, then an error will be returned.
func (n *NodeSigner) SignMessage(pubKey *btcec.PublicKey,
msg []byte) (input.Signature, error) {
// resident node's private key described in the key locator. If the target key
// locator is _not_ the node's private key, then an error will be returned.
func (n *NodeSigner) SignMessage(keyLoc keychain.KeyLocator,
msg []byte) (*btcec.Signature, error) {
// If this isn't our identity public key, then we'll exit early with an
// error as we can't sign with this key.
if !pubKey.IsEqual(n.keySigner.PubKey()) {
return nil, fmt.Errorf("unknown public key")
if keyLoc != n.keySigner.KeyLocator() {
return nil, fmt.Errorf("unknown public key locator")
}
// Otherwise, we'll sign the double-sha256 of the target message.