// newManagedAddressWithoutPrivKey returns a new managed address based on the
// passed account, public key, and whether or not the public key should be
// compressed.
func newManagedAddressWithoutPrivKey(m *Manager, account uint32, pubKey chainec.PublicKey, compressed bool) (*managedAddress, error) {
// Create a pay-to-pubkey-hash address from the public key.
var pubKeyHash []byte
if compressed {
pubKeyHash = dcrutil.Hash160(pubKey.SerializeCompressed())
} else {
pubKeyHash = dcrutil.Hash160(pubKey.SerializeUncompressed())
}
address, err := dcrutil.NewAddressPubKeyHash(pubKeyHash, m.chainParams,
chainec.ECTypeSecp256k1)
if err != nil {
return nil, err
}
return &managedAddress{
manager: m,
address: address,
account: account,
imported: false,
internal: false,
multisig: false,
compressed: compressed,
pubKey: pubKey,
privKeyEncrypted: nil,
privKeyCT: nil,
}, nil
}
// Exists returns true if an existing entry of 'sig' over 'sigHash' for public
// key 'pubKey' is found within the SigCache. Otherwise, false is returned.
//
// NOTE: This function is safe for concurrent access. Readers won't be blocked
// unless there exists a writer, adding an entry to the SigCache.
func (s *SigCache) Exists(sigHash chainhash.Hash, sig chainec.Signature, pubKey chainec.PublicKey) bool {
info := sigInfo{sigHash, string(sig.Serialize()),
string(pubKey.SerializeCompressed())}
s.RLock()
_, ok := s.validSigs[info]
s.RUnlock()
return ok
}
// Exists returns true if an existing entry of 'sig' over 'sigHash' for public
// key 'pubKey' is found within the SigCache. Otherwise, false is returned.
//
// NOTE: This function is safe for concurrent access. Readers won't be blocked
// unless there exists a writer, adding an entry to the SigCache.
func (s *SigCache) Exists(sigHash chainhash.Hash, sig chainec.Signature, pubKey chainec.PublicKey) bool {
s.RLock()
defer s.RUnlock()
if entry, ok := s.validSigs[sigHash]; ok {
pkEqual := bytes.Equal(entry.pubKey.SerializeCompressed(),
pubKey.SerializeCompressed())
sigEqual := bytes.Equal(entry.sig.Serialize(), sig.Serialize())
return pkEqual && sigEqual
}
return false
}
// SerializePubKey serializes the associated public key of the imported or
// exported private key in compressed format. The serialization format
// chosen depends on the value of w.ecType.
func (w *WIF) SerializePubKey() []byte {
pkx, pky := w.PrivKey.Public()
var pk chainec.PublicKey
switch w.ecType {
case chainec.ECTypeSecp256k1:
pk = chainec.Secp256k1.NewPublicKey(pkx, pky)
case chainec.ECTypeEdwards:
pk = chainec.Edwards.NewPublicKey(pkx, pky)
case chainec.ECTypeSecSchnorr:
pk = chainec.SecSchnorr.NewPublicKey(pkx, pky)
}
return pk.SerializeCompressed()
}
// Add adds an entry for a signature over 'sigHash' under public key 'pubKey'
// to the signature cache. In the event that the SigCache is 'full', an
// existing entry it randomly chosen to be evicted in order to make space for
// the new entry.
//
// NOTE: This function is safe for concurrent access. Writers will block
// simultaneous readers until function execution has concluded.
func (s *SigCache) Add(sigHash chainhash.Hash, sig chainec.Signature, pubKey chainec.PublicKey) {
s.Lock()
defer s.Unlock()
if s.maxEntries <= 0 {
return
}
// If adding this new entry will put us over the max number of allowed
// entries, then evict an entry.
if uint(len(s.validSigs)+1) > s.maxEntries {
// Generate a cryptographically random hash.
randHashBytes := make([]byte, chainhash.HashSize)
_, err := rand.Read(randHashBytes)
if err != nil {
// Failure to read a random hash results in the proposed
// entry not being added to the cache since we are
// unable to evict any existing entries.
return
}
// Try to find the first entry that is greater than the random
// hash. Use the first entry (which is already pseudo random due
// to Go's range statement over maps) as a fall back if none of
// the hashes in the rejected transactions pool are larger than
// the random hash.
var foundEntry sigInfo
for sigEntry := range s.validSigs {
if foundEntry.sig == "" {
foundEntry = sigEntry
}
if bytes.Compare(sigEntry.sigHash.Bytes(), randHashBytes) > 0 {
foundEntry = sigEntry
break
}
}
delete(s.validSigs, foundEntry)
}
info := sigInfo{sigHash, string(sig.Serialize()),
string(pubKey.SerializeCompressed())}
s.validSigs[info] = struct{}{}
}
// SignatureScriptAlt creates an input signature script for tx to spend coins sent
// from a previous output to the owner of privKey. tx must include all
// transaction inputs and outputs, however txin scripts are allowed to be filled
// or empty. The returned script is calculated to be used as the idx'th txin
// sigscript for tx. subscript is the PkScript of the previous output being used
// as the idx'th input. privKey is serialized in the respective format for the
// ECDSA type. This format must match the same format used to generate the payment
// address, or the script validation will fail.
func SignatureScriptAlt(tx *wire.MsgTx, idx int, subscript []byte,
hashType SigHashType, privKey chainec.PrivateKey, compress bool,
sigType int) ([]byte,
error) {
sig, err := RawTxInSignatureAlt(tx, idx, subscript, hashType, privKey,
sigTypes(sigType))
if err != nil {
return nil, err
}
pubx, puby := privKey.Public()
var pub chainec.PublicKey
switch sigTypes(sigType) {
case edwards:
pub = chainec.Edwards.NewPublicKey(pubx, puby)
case secSchnorr:
pub = chainec.SecSchnorr.NewPublicKey(pubx, puby)
}
pkData := pub.Serialize()
return NewScriptBuilder().AddData(sig).AddData(pkData).Script()
}