func fetchChanFundingInfo(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error {
var b bytes.Buffer
if err := writeOutpoint(&b, channel.ChanID); err != nil {
return err
}
fundTxnKey := make([]byte, len(fundingTxnKey)+b.Len())
copy(fundTxnKey[:3], fundingTxnKey)
copy(fundTxnKey[3:], b.Bytes())
infoBytes := bytes.NewReader(nodeChanBucket.Get(fundTxnKey))
// TODO(roasbeef): can remove as channel ID *is* the funding point now.
channel.FundingOutpoint = &wire.OutPoint{}
if err := readOutpoint(infoBytes, channel.FundingOutpoint); err != nil {
return err
}
ourKeyBytes, err := wire.ReadVarBytes(infoBytes, 0, 34, "")
if err != nil {
return err
}
channel.OurMultiSigKey, err = btcec.ParsePubKey(ourKeyBytes, btcec.S256())
if err != nil {
return err
}
theirKeyBytes, err := wire.ReadVarBytes(infoBytes, 0, 34, "")
if err != nil {
return err
}
channel.TheirMultiSigKey, err = btcec.ParsePubKey(theirKeyBytes, btcec.S256())
if err != nil {
return err
}
channel.FundingWitnessScript, err = wire.ReadVarBytes(infoBytes, 0, 520, "")
if err != nil {
return err
}
scratch := make([]byte, 8)
if _, err := infoBytes.Read(scratch); err != nil {
return err
}
unixSecs := byteOrder.Uint64(scratch)
channel.CreationTime = time.Unix(int64(unixSecs), 0)
return nil
}
func fetchChanElkremState(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error {
var b bytes.Buffer
if err := writeOutpoint(&b, channel.ChanID); err != nil {
return err
}
elkremKey := make([]byte, len(elkremStateKey)+b.Len())
copy(elkremKey[:3], elkremStateKey)
copy(elkremKey[3:], b.Bytes())
elkremStateBytes := bytes.NewReader(nodeChanBucket.Get(elkremKey))
revKeyBytes, err := wire.ReadVarBytes(elkremStateBytes, 0, 1000, "")
if err != nil {
return err
}
channel.TheirCurrentRevocation, err = btcec.ParsePubKey(revKeyBytes, btcec.S256())
if err != nil {
return err
}
if _, err := elkremStateBytes.Read(channel.TheirCurrentRevocationHash[:]); err != nil {
return err
}
// TODO(roasbeef): should be rederiving on fly, or encrypting on disk.
senderBytes, err := wire.ReadVarBytes(elkremStateBytes, 0, 1000, "")
if err != nil {
return err
}
elkremRoot, err := wire.NewShaHash(senderBytes)
if err != nil {
return err
}
channel.LocalElkrem = elkrem.NewElkremSender(*elkremRoot)
reciverBytes, err := wire.ReadVarBytes(elkremStateBytes, 0, 1000, "")
if err != nil {
return err
}
remoteE, err := elkrem.ElkremReceiverFromBytes(reciverBytes)
if err != nil {
return err
}
channel.RemoteElkrem = remoteE
return nil
}
func deserializeInvoice(r io.Reader) (*Invoice, error) {
var err error
invoice := &Invoice{}
// TODO(roasbeef): use read full everywhere
invoice.Memo, err = wire.ReadVarBytes(r, 0, MaxMemoSize, "")
if err != nil {
return nil, err
}
invoice.Receipt, err = wire.ReadVarBytes(r, 0, MaxReceiptSize, "")
if err != nil {
return nil, err
}
birthBytes, err := wire.ReadVarBytes(r, 0, 300, "birth")
if err != nil {
return nil, err
}
if err := invoice.CreationDate.UnmarshalBinary(birthBytes); err != nil {
return nil, err
}
if _, err := io.ReadFull(r, invoice.Terms.PaymentPreimage[:]); err != nil {
return nil, err
}
var scratch [8]byte
if _, err := io.ReadFull(r, scratch[:]); err != nil {
return nil, err
}
invoice.Terms.Value = btcutil.Amount(byteOrder.Uint64(scratch[:]))
var settleByte [1]byte
if _, err := io.ReadFull(r, settleByte[:]); err != nil {
return nil, err
}
if settleByte[0] == 1 {
invoice.Terms.Settled = true
}
return invoice, nil
}
func fetchChanDeliveryScripts(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error {
var b bytes.Buffer
if err := writeOutpoint(&b, channel.ChanID); err != nil {
return err
}
deliveryKey := make([]byte, len(deliveryScriptsKey)+b.Len())
copy(deliveryKey[:3], deliveryScriptsKey)
copy(deliveryKey[3:], b.Bytes())
var err error
deliveryBytes := bytes.NewReader(nodeChanBucket.Get(deliveryScriptsKey))
channel.OurDeliveryScript, err = wire.ReadVarBytes(deliveryBytes, 0, 520, "")
if err != nil {
return err
}
channel.TheirDeliveryScript, err = wire.ReadVarBytes(deliveryBytes, 0, 520, "")
if err != nil {
return err
}
return nil
}
func readOutpoint(r io.Reader, o *wire.OutPoint) error {
scratch := make([]byte, 4)
txid, err := wire.ReadVarBytes(r, 0, 32, "prevout")
if err != nil {
return err
}
copy(o.Hash[:], txid)
if _, err := r.Read(scratch); err != nil {
return err
}
o.Index = byteOrder.Uint32(scratch)
return nil
}
func fetchChanCommitTxns(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error {
var bc bytes.Buffer
var err error
if err = writeOutpoint(&bc, channel.ChanID); err != nil {
return err
}
txnsKey := make([]byte, len(commitTxnsKey)+bc.Len())
copy(txnsKey[:3], commitTxnsKey)
copy(txnsKey[3:], bc.Bytes())
txnBytes := bytes.NewReader(nodeChanBucket.Get(txnsKey))
channel.OurCommitTx = wire.NewMsgTx()
if err = channel.OurCommitTx.Deserialize(txnBytes); err != nil {
return err
}
channel.OurCommitSig, err = wire.ReadVarBytes(txnBytes, 0, 80, "")
if err != nil {
return err
}
scratch := make([]byte, 4)
if _, err := txnBytes.Read(scratch); err != nil {
return err
}
channel.LocalCsvDelay = byteOrder.Uint32(scratch)
if _, err := txnBytes.Read(scratch); err != nil {
return err
}
channel.RemoteCsvDelay = byteOrder.Uint32(scratch)
return 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
}