Exemple #1
0
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
}
Exemple #2
0
// 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
}