lnd.xprv/rpcserver.go

304 lines
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2015-12-26 09:09:17 +03:00
package main
import (
"encoding/hex"
"fmt"
"log"
"net"
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"strings"
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"github.com/btcsuite/btcd/chaincfg"
"github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcwallet/waddrmgr"
"github.com/lightningnetwork/lnd/lndc"
"github.com/lightningnetwork/lnd/lnrpc"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwire"
"golang.org/x/net/context"
)
var (
defaultAccount uint32 = waddrmgr.DefaultAccountNum
)
// rpcServer...
type rpcServer struct { // doesn't count as globals I think
lnwallet *lnwallet.LightningWallet // interface to the bitcoin network
CnMap map[[16]byte]net.Conn //interface to the lightning network
OmniChan chan []byte // channel for all incoming messages from LN nodes.
// can split the OmniChan up if that is helpful. So far 1 seems OK.
}
type LNAdr struct {
LNId [16]byte // redundant because adr contains it
Adr btcutil.Address
PubKey *btcec.PublicKey
Name string
Host string
Endorsement []byte
}
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func (l *LNAdr) ParseFromString(s string) error {
var err error
if len(s) == 0 {
return fmt.Errorf("LNid ParseFromString: null string")
}
if l == nil { // make a LNId if it doesn't exist
return fmt.Errorf("null id, initialize first")
}
ss := strings.Split(s, "@")
ident := ss[0]
if len(ss) > 1 { // redundant? no
l.Host = ss[1]
}
if len(ident) > 65 && len(ident) < 69 { // could be pubkey
pubkeyBytes, err := hex.DecodeString(ident)
if err != nil {
return err
}
l.PubKey, err = btcec.ParsePubKey(pubkeyBytes, btcec.S256())
if err != nil {
return err
}
// got pubey, populate address from pubkey
l.Adr, err = btcutil.NewAddressPubKeyHash(btcutil.Hash160(
l.PubKey.SerializeCompressed()), &chaincfg.TestNet3Params)
if err != nil {
return err
}
} else if len(ident) > 33 && len(ident) < 37 { // could be pkh
l.Adr, err = btcutil.DecodeAddress(
ident, &chaincfg.TestNet3Params)
if err != nil {
return err
}
} else {
return fmt.Errorf("invalid address %s", ident)
}
// check for nonstandard port
// if strings.Count(lid.Host, ":") == 1 {
// }
//don't for now... stdlib should do this. ipv6 and stuff...
// populate LNId from address
copy(l.LNId[:], l.Adr.ScriptAddress())
return nil
}
var _ lnrpc.LightningServer = (*rpcServer)(nil)
// newRpcServer...
func newRpcServer(wallet *lnwallet.LightningWallet) *rpcServer {
return &rpcServer{wallet,
make(map[[16]byte]net.Conn), // initialize with empty CnMap
make(chan []byte)} // init OmniChan (size 1 ok...?)
}
// Stop...
func (r *rpcServer) Stop() error {
return nil
}
// getPriv gets the identity private key out of the wallet DB
func getPriv(l *lnwallet.LightningWallet) (*btcec.PrivateKey, error) {
adr, err := l.ChannelDB.GetIdAdr()
if err != nil {
return nil, err
}
fmt.Printf("got ID address: %s\n", adr.String())
adr2, err := l.Manager.Address(adr)
if err != nil {
return nil, err
}
priv, err := adr2.(waddrmgr.ManagedPubKeyAddress).PrivKey()
if err != nil {
return nil, err
}
fmt.Printf("got privkey %x\n", priv.Serialize()) // may want to remove this :)
return priv, nil
}
// SendMany...
func (r *rpcServer) SendMany(ctx context.Context, in *lnrpc.SendManyRequest) (*lnrpc.SendManyResponse, error) {
sendMap := make(map[string]btcutil.Amount)
for addr, amt := range in.AddrToAmount {
sendMap[addr] = btcutil.Amount(amt)
}
txid, err := r.lnwallet.SendPairs(sendMap, defaultAccount, 1)
if err != nil {
return nil, err
}
return &lnrpc.SendManyResponse{Txid: hex.EncodeToString(txid[:])}, nil
}
// NewAddress...
func (r *rpcServer) NewAddress(ctx context.Context, in *lnrpc.NewAddressRequest) (*lnrpc.NewAddressResponse, error) {
r.lnwallet.KeyGenMtx.Lock()
defer r.lnwallet.KeyGenMtx.Unlock()
addr, err := r.lnwallet.NewAddress(defaultAccount)
if err != nil {
return nil, err
}
return &lnrpc.NewAddressResponse{Address: addr.String()}, nil
}
// LNConnect
func (r *rpcServer) LNConnect(ctx context.Context,
in *lnrpc.LNConnectRequest) (*lnrpc.LnConnectResponse, error) {
var err error
if len(in.IdAtHost) == 0 {
return nil, fmt.Errorf("need: lnc pubkeyhash@hostname")
}
var newNode LNAdr
err = newNode.ParseFromString(in.IdAtHost)
if err != nil {
return nil, err
}
if _, ok := r.CnMap[newNode.LNId]; ok {
return nil, fmt.Errorf("Already connected to %x", newNode.LNId)
}
if newNode.Host == "" { // do PBX connect; leave for now
return nil, fmt.Errorf("no hostname")
}
priv, err := getPriv(r.lnwallet)
if err != nil {
return nil, err
}
// dial TCP
newConn := new(lndc.LNDConn)
newConn.Cn, err = net.Dial("tcp", newNode.Host+":"+"2448")
if err != nil {
return nil, err
}
// TODO differentiate; right now only uses PKH
if newNode.PubKey != nil { // have pubkey, use that
err = newConn.Open(priv, newNode.Adr.ScriptAddress())
if err != nil {
return nil, err
}
} else { // only have address (pubkey hash), use that
err = newConn.Open(priv, newNode.Adr.ScriptAddress())
if err != nil {
return nil, err
}
}
idslice := lndc.H160(newConn.RemotePub.SerializeCompressed())
var newId [16]byte
copy(newId[:], idslice[:16])
r.CnMap[newId] = newConn
log.Printf("added %x to map\n", newId)
go LNDCReceiver(newConn, newId, r)
resp := new(lnrpc.LnConnectResponse)
resp.LnID = newId[:]
return resp, nil
}
// TCPListen
func (r *rpcServer) TCPListen(ctx context.Context,
in *lnrpc.TCPListenRequest) (*lnrpc.TCPListenResponse, error) {
// LnListen listens on the default port for incoming connections
//ignore args and launch listener goroutine
priv, err := getPriv(r.lnwallet)
if err != nil {
return nil, err
}
go TCPListener(priv, r)
resp := new(lnrpc.TCPListenResponse)
return resp, nil
}
// LNChat
func (r *rpcServer) LNChat(ctx context.Context,
in *lnrpc.LnChatRequest) (*lnrpc.LnChatResponse, error) {
log.Printf("requested to chat, message: %s\n", in.Msg)
var dest [16]byte
if len(in.DestID) != 16 {
return nil, fmt.Errorf("Expect 16 byte destination Id, got %d byte",
len(in.DestID))
}
copy(dest[:], in.DestID)
if len(in.Msg) == 0 {
return nil, fmt.Errorf("you have to say something")
}
if len(r.CnMap) == 0 { // This check is redundant. May still help though.
return nil, fmt.Errorf("Not connected to anyone")
}
if _, ok := r.CnMap[dest]; !ok {
return nil, fmt.Errorf("dest %x not connected", dest)
}
msg := append([]byte{lnwire.MSGID_TEXTCHAT}, []byte(in.Msg)...)
_, err := r.CnMap[dest].Write(msg)
if err != nil {
return nil, err
}
resp := new(lnrpc.LnChatResponse)
return resp, nil
}
func TCPListener(priv *btcec.PrivateKey, r *rpcServer) {
listener, err := net.Listen("tcp", ":"+"2448")
if err != nil {
fmt.Printf("TCP listen error: %s\n", err.Error())
return
}
fmt.Printf("Listening on %s\n", listener.Addr().String())
for {
con, err := listener.Accept() // this blocks
if err != nil {
log.Printf("Listener error: %s\n", err.Error())
continue
}
newConn, err := InitIncomingConn(priv, con)
if err != nil {
fmt.Printf("InitConn error: %s\n", err.Error())
continue
}
idslice := lndc.H160(newConn.RemotePub.SerializeCompressed())
var newId [16]byte
copy(newId[:], idslice[:16])
r.CnMap[newId] = newConn
fmt.Printf("added %x to map\n", newId)
go LNDCReceiver(newConn, newId, r)
}
}
func InitIncomingConn(priv *btcec.PrivateKey, con net.Conn) (*lndc.LNDConn, error) {
LNcon := new(lndc.LNDConn)
LNcon.Cn = con
err := LNcon.Setup(priv)
if err != nil {
return LNcon, err
}
fmt.Printf("Got connection from %s authed with pubkey %x",
LNcon.Cn.RemoteAddr().String(), LNcon.RemotePub.SerializeCompressed())
return LNcon, nil
}