func deserializeLinkNode(r io.Reader) (*LinkNode, error) {
var (
err error
buf [8]byte
)
node := &LinkNode{}
if _, err := io.ReadFull(r, buf[:4]); err != nil {
return nil, err
}
node.Network = wire.BitcoinNet(byteOrder.Uint32(buf[:4]))
var pub [33]byte
if _, err := io.ReadFull(r, pub[:]); err != nil {
return nil, err
}
node.IdentityPub, err = btcec.ParsePubKey(pub[:], btcec.S256())
if err != nil {
return nil, err
}
if _, err := io.ReadFull(r, buf[:]); err != nil {
return nil, err
}
node.LastSeen = time.Unix(int64(byteOrder.Uint64(buf[:])), 0)
if _, err := io.ReadFull(r, buf[:4]); err != nil {
return nil, err
}
numAddrs := byteOrder.Uint32(buf[:4])
node.Addresses = make([]*net.TCPAddr, numAddrs)
for i := uint32(0); i < numAddrs; i++ {
addrString, err := wire.ReadVarString(r, 0)
if err != nil {
return nil, err
}
addr, err := net.ResolveTCPAddr("tcp", addrString)
if err != nil {
return nil, err
}
node.Addresses[i] = addr
}
return node, nil
}
// readElement is a one-stop utility function to deserialize any datastructure
// encoded using the serialization format of lnwire.
func readElement(r io.Reader, element interface{}) error {
var err error
switch e := element.(type) {
case *uint8:
var b [1]uint8
if _, err := r.Read(b[:]); err != nil {
return err
}
*e = b[0]
case *uint16:
var b [2]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = binary.BigEndian.Uint16(b[:])
case *ErrorCode:
var b [2]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = ErrorCode(binary.BigEndian.Uint16(b[:]))
case *CreditsAmount:
var b [8]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = CreditsAmount(int64(binary.BigEndian.Uint64(b[:])))
case *uint32:
var b [4]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = binary.BigEndian.Uint32(b[:])
case *uint64:
var b [8]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = binary.BigEndian.Uint64(b[:])
case *HTLCKey:
var b [8]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = HTLCKey(int64(binary.BigEndian.Uint64(b[:])))
case *btcutil.Amount:
var b [8]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = btcutil.Amount(int64(binary.BigEndian.Uint64(b[:])))
case **wire.ShaHash:
var b wire.ShaHash
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = &b
case **btcec.PublicKey:
var b [33]byte
if _, err = io.ReadFull(r, b[:]); err != nil {
return err
}
pubKey, err := btcec.ParsePubKey(b[:], btcec.S256())
if err != nil {
return err
}
*e = pubKey
case *[]uint64:
var numItems uint16
if err := readElement(r, &numItems); err != nil {
return err
}
// if numItems > 65535 {
// return fmt.Errorf("Too many items in []uint64")
// }
// Read the number of items
var items []uint64
for i := uint16(0); i < numItems; i++ {
var item uint64
err = readElement(r, &item)
if err != nil {
return err
}
items = append(items, item)
}
*e = items
case *[]*btcec.Signature:
var numSigs uint8
err = readElement(r, &numSigs)
if err != nil {
return err
}
if numSigs > 127 {
return fmt.Errorf("Too many signatures!")
}
// Read that number of signatures
var sigs []*btcec.Signature
for i := uint8(0); i < numSigs; i++ {
sig := new(btcec.Signature)
err = readElement(r, &sig)
if err != nil {
return err
}
sigs = append(sigs, sig)
}
*e = sigs
return nil
case **btcec.Signature:
sigBytes, err := wire.ReadVarBytes(r, 0, 73, "signature")
if err != nil {
return err
}
sig, err := btcec.ParseSignature(sigBytes, btcec.S256())
if err != nil {
return err
}
*e = sig
case *[][32]byte:
// How many to read
var sliceSize uint16
err = readElement(r, &sliceSize)
if err != nil {
return err
}
data := make([][32]byte, 0, sliceSize)
// Append the actual
for i := uint16(0); i < sliceSize; i++ {
var element [32]byte
err = readElement(r, &element)
if err != nil {
return err
}
data = append(data, element)
}
*e = data
case *[32]byte:
if _, err = io.ReadFull(r, e[:]); err != nil {
return err
}
case *wire.BitcoinNet:
var b [4]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return err
}
*e = wire.BitcoinNet(binary.BigEndian.Uint32(b[:]))
return nil
case *[]byte:
bytes, err := wire.ReadVarBytes(r, 0, MaxSliceLength, "byte slice")
if err != nil {
return err
}
*e = bytes
case *PkScript:
pkScript, err := wire.ReadVarBytes(r, 0, 25, "pkscript")
if err != nil {
return err
}
*e = pkScript
case *string:
str, err := wire.ReadVarString(r, 0)
if err != nil {
return err
}
*e = str
case *[]*wire.TxIn:
// Read the size (1-byte number of txins)
var numScripts uint8
if err := readElement(r, &numScripts); err != nil {
return err
}
if numScripts > 127 {
return fmt.Errorf("Too many txins")
}
// Append the actual TxIns
txins := make([]*wire.TxIn, 0, numScripts)
for i := uint8(0); i < numScripts; i++ {
outpoint := new(wire.OutPoint)
txin := wire.NewTxIn(outpoint, nil, nil)
if err := readElement(r, &txin); err != nil {
return err
}
txins = append(txins, txin)
}
*e = txins
case **wire.TxIn:
// Hash
var h [32]byte
if _, err = io.ReadFull(r, h[:]); err != nil {
return err
}
hash, err := wire.NewShaHash(h[:])
if err != nil {
return err
}
(*e).PreviousOutPoint.Hash = *hash
// Index
var idxBytes [4]byte
_, err = io.ReadFull(r, idxBytes[:])
if err != nil {
return err
}
(*e).PreviousOutPoint.Index = binary.BigEndian.Uint32(idxBytes[:])
return nil
case **wire.OutPoint:
// TODO(roasbeef): consolidate with above
var h [32]byte
if _, err = io.ReadFull(r, h[:]); err != nil {
return err
}
hash, err := wire.NewShaHash(h[:])
if err != nil {
return err
}
// Index
var idxBytes [4]byte
_, err = io.ReadFull(r, idxBytes[:])
if err != nil {
return err
}
index := binary.BigEndian.Uint32(idxBytes[:])
*e = wire.NewOutPoint(hash, index)
default:
return fmt.Errorf("Unknown type in readElement: %T", e)
}
return nil
}