834 lines
25 KiB
Go
834 lines
25 KiB
Go
package lnd
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import (
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"encoding/hex"
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"fmt"
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"io/ioutil"
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"net"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"sync"
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"time"
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"github.com/btcsuite/btcd/chaincfg/chainhash"
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"github.com/btcsuite/btcd/rpcclient"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/btcwallet/chain"
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"github.com/btcsuite/btcwallet/wallet"
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"github.com/btcsuite/btcwallet/walletdb"
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"github.com/lightninglabs/neutrino"
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"github.com/lightninglabs/neutrino/headerfs"
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"github.com/lightningnetwork/lnd/chainntnfs"
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"github.com/lightningnetwork/lnd/chainntnfs/bitcoindnotify"
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"github.com/lightningnetwork/lnd/chainntnfs/btcdnotify"
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"github.com/lightningnetwork/lnd/chainntnfs/neutrinonotify"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/htlcswitch"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/keychain"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwallet/btcwallet"
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"github.com/lightningnetwork/lnd/lnwallet/chainfee"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/routing/chainview"
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)
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const (
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// defaultBitcoinMinHTLCMSat is the default smallest value htlc this
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// node will accept. This value is proposed in the channel open sequence
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// and cannot be changed during the life of the channel. It is 1 msat by
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// default to allow maximum flexibility in deciding what size payments
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// to forward.
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//
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// All forwarded payments are subjected to the min htlc constraint of
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// the routing policy of the outgoing channel. This implicitly controls
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// the minimum htlc value on the incoming channel too.
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defaultBitcoinMinHTLCInMSat = lnwire.MilliSatoshi(1)
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// defaultBitcoinMinHTLCOutMSat is the default minimum htlc value that
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// we require for sending out htlcs. Our channel peer may have a lower
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// min htlc channel parameter, but we - by default - don't forward
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// anything under the value defined here.
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defaultBitcoinMinHTLCOutMSat = lnwire.MilliSatoshi(1000)
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// DefaultBitcoinBaseFeeMSat is the default forwarding base fee.
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DefaultBitcoinBaseFeeMSat = lnwire.MilliSatoshi(1000)
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// DefaultBitcoinFeeRate is the default forwarding fee rate.
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DefaultBitcoinFeeRate = lnwire.MilliSatoshi(1)
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// DefaultBitcoinTimeLockDelta is the default forwarding time lock
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// delta.
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DefaultBitcoinTimeLockDelta = 40
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defaultLitecoinMinHTLCInMSat = lnwire.MilliSatoshi(1)
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defaultLitecoinMinHTLCOutMSat = lnwire.MilliSatoshi(1000)
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defaultLitecoinBaseFeeMSat = lnwire.MilliSatoshi(1000)
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defaultLitecoinFeeRate = lnwire.MilliSatoshi(1)
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defaultLitecoinTimeLockDelta = 576
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defaultLitecoinDustLimit = btcutil.Amount(54600)
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// defaultBitcoinStaticFeePerKW is the fee rate of 50 sat/vbyte
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// expressed in sat/kw.
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defaultBitcoinStaticFeePerKW = chainfee.SatPerKWeight(12500)
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// defaultBitcoinStaticMinRelayFeeRate is the min relay fee used for
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// static estimators.
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defaultBitcoinStaticMinRelayFeeRate = chainfee.FeePerKwFloor
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// defaultLitecoinStaticFeePerKW is the fee rate of 200 sat/vbyte
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// expressed in sat/kw.
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defaultLitecoinStaticFeePerKW = chainfee.SatPerKWeight(50000)
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// btcToLtcConversionRate is a fixed ratio used in order to scale up
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// payments when running on the Litecoin chain.
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btcToLtcConversionRate = 60
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)
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// defaultBtcChannelConstraints is the default set of channel constraints that are
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// meant to be used when initially funding a Bitcoin channel.
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//
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// TODO(halseth): make configurable at startup?
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var defaultBtcChannelConstraints = channeldb.ChannelConstraints{
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DustLimit: lnwallet.DefaultDustLimit(),
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MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
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}
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// defaultLtcChannelConstraints is the default set of channel constraints that are
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// meant to be used when initially funding a Litecoin channel.
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var defaultLtcChannelConstraints = channeldb.ChannelConstraints{
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DustLimit: defaultLitecoinDustLimit,
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MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
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}
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// chainCode is an enum-like structure for keeping track of the chains
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// currently supported within lnd.
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type chainCode uint32
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const (
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// bitcoinChain is Bitcoin's testnet chain.
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bitcoinChain chainCode = iota
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// litecoinChain is Litecoin's testnet chain.
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litecoinChain
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)
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// String returns a string representation of the target chainCode.
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func (c chainCode) String() string {
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switch c {
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case bitcoinChain:
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return "bitcoin"
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case litecoinChain:
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return "litecoin"
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default:
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return "kekcoin"
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}
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}
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// chainControl couples the three primary interfaces lnd utilizes for a
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// particular chain together. A single chainControl instance will exist for all
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// the chains lnd is currently active on.
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type chainControl struct {
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chainIO lnwallet.BlockChainIO
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feeEstimator chainfee.Estimator
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signer input.Signer
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keyRing keychain.SecretKeyRing
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wc lnwallet.WalletController
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msgSigner lnwallet.MessageSigner
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chainNotifier chainntnfs.ChainNotifier
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chainView chainview.FilteredChainView
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wallet *lnwallet.LightningWallet
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routingPolicy htlcswitch.ForwardingPolicy
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minHtlcIn lnwire.MilliSatoshi
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}
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// newChainControlFromConfig attempts to create a chainControl instance
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// according to the parameters in the passed lnd configuration. Currently three
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// branches of chainControl instances exist: one backed by a running btcd
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// full-node, another backed by a running bitcoind full-node, and the other
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// backed by a running neutrino light client instance. When running with a
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// neutrino light client instance, `neutrinoCS` must be non-nil.
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func newChainControlFromConfig(cfg *config, chanDB *channeldb.DB,
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privateWalletPw, publicWalletPw []byte, birthday time.Time,
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recoveryWindow uint32, wallet *wallet.Wallet,
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neutrinoCS *neutrino.ChainService) (*chainControl, error) {
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// Set the RPC config from the "home" chain. Multi-chain isn't yet
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// active, so we'll restrict usage to a particular chain for now.
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homeChainConfig := cfg.Bitcoin
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if registeredChains.PrimaryChain() == litecoinChain {
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homeChainConfig = cfg.Litecoin
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}
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ltndLog.Infof("Primary chain is set to: %v",
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registeredChains.PrimaryChain())
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cc := &chainControl{}
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switch registeredChains.PrimaryChain() {
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case bitcoinChain:
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cc.routingPolicy = htlcswitch.ForwardingPolicy{
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MinHTLCOut: cfg.Bitcoin.MinHTLCOut,
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BaseFee: cfg.Bitcoin.BaseFee,
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FeeRate: cfg.Bitcoin.FeeRate,
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TimeLockDelta: cfg.Bitcoin.TimeLockDelta,
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}
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cc.minHtlcIn = cfg.Bitcoin.MinHTLCIn
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cc.feeEstimator = chainfee.NewStaticEstimator(
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defaultBitcoinStaticFeePerKW,
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defaultBitcoinStaticMinRelayFeeRate,
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)
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case litecoinChain:
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cc.routingPolicy = htlcswitch.ForwardingPolicy{
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MinHTLCOut: cfg.Litecoin.MinHTLCOut,
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BaseFee: cfg.Litecoin.BaseFee,
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FeeRate: cfg.Litecoin.FeeRate,
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TimeLockDelta: cfg.Litecoin.TimeLockDelta,
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}
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cc.minHtlcIn = cfg.Litecoin.MinHTLCIn
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cc.feeEstimator = chainfee.NewStaticEstimator(
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defaultLitecoinStaticFeePerKW, 0,
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)
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default:
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return nil, fmt.Errorf("Default routing policy for chain %v is "+
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"unknown", registeredChains.PrimaryChain())
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}
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walletConfig := &btcwallet.Config{
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PrivatePass: privateWalletPw,
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PublicPass: publicWalletPw,
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Birthday: birthday,
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RecoveryWindow: recoveryWindow,
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DataDir: homeChainConfig.ChainDir,
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NetParams: activeNetParams.Params,
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CoinType: activeNetParams.CoinType,
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Wallet: wallet,
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}
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var err error
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// Initialize the height hint cache within the chain directory.
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hintCache, err := chainntnfs.NewHeightHintCache(chanDB)
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if err != nil {
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return nil, fmt.Errorf("unable to initialize height hint "+
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"cache: %v", err)
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}
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// If spv mode is active, then we'll be using a distinct set of
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// chainControl interfaces that interface directly with the p2p network
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// of the selected chain.
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switch homeChainConfig.Node {
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case "neutrino":
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// We'll create ChainNotifier and FilteredChainView instances,
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// along with the wallet's ChainSource, which are all backed by
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// the neutrino light client.
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cc.chainNotifier = neutrinonotify.New(
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neutrinoCS, hintCache, hintCache,
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)
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cc.chainView, err = chainview.NewCfFilteredChainView(neutrinoCS)
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if err != nil {
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return nil, err
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}
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// If the user provided an API for fee estimation, activate it now.
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if cfg.NeutrinoMode.FeeURL != "" {
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ltndLog.Infof("Using API fee estimator!")
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estimator := chainfee.NewWebAPIEstimator(
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chainfee.SparseConfFeeSource{
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URL: cfg.NeutrinoMode.FeeURL,
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},
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defaultBitcoinStaticFeePerKW,
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)
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if err := estimator.Start(); err != nil {
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return nil, err
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}
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cc.feeEstimator = estimator
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}
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walletConfig.ChainSource = chain.NewNeutrinoClient(
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activeNetParams.Params, neutrinoCS,
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)
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case "bitcoind", "litecoind":
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var bitcoindMode *bitcoindConfig
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switch {
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case cfg.Bitcoin.Active:
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bitcoindMode = cfg.BitcoindMode
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case cfg.Litecoin.Active:
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bitcoindMode = cfg.LitecoindMode
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}
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// Otherwise, we'll be speaking directly via RPC and ZMQ to a
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// bitcoind node. If the specified host for the btcd/ltcd RPC
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// server already has a port specified, then we use that
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// directly. Otherwise, we assume the default port according to
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// the selected chain parameters.
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var bitcoindHost string
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if strings.Contains(bitcoindMode.RPCHost, ":") {
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bitcoindHost = bitcoindMode.RPCHost
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} else {
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// The RPC ports specified in chainparams.go assume
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// btcd, which picks a different port so that btcwallet
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// can use the same RPC port as bitcoind. We convert
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// this back to the btcwallet/bitcoind port.
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rpcPort, err := strconv.Atoi(activeNetParams.rpcPort)
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if err != nil {
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return nil, err
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}
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rpcPort -= 2
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bitcoindHost = fmt.Sprintf("%v:%d",
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bitcoindMode.RPCHost, rpcPort)
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if (cfg.Bitcoin.Active && cfg.Bitcoin.RegTest) ||
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(cfg.Litecoin.Active && cfg.Litecoin.RegTest) {
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conn, err := net.Dial("tcp", bitcoindHost)
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if err != nil || conn == nil {
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if cfg.Bitcoin.Active && cfg.Bitcoin.RegTest {
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rpcPort = 18443
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} else if cfg.Litecoin.Active && cfg.Litecoin.RegTest {
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rpcPort = 19443
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}
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bitcoindHost = fmt.Sprintf("%v:%d",
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bitcoindMode.RPCHost,
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rpcPort)
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} else {
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conn.Close()
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}
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}
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}
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// Establish the connection to bitcoind and create the clients
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// required for our relevant subsystems.
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bitcoindConn, err := chain.NewBitcoindConn(
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activeNetParams.Params, bitcoindHost,
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bitcoindMode.RPCUser, bitcoindMode.RPCPass,
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bitcoindMode.ZMQPubRawBlock, bitcoindMode.ZMQPubRawTx,
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100*time.Millisecond,
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)
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if err != nil {
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return nil, err
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}
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if err := bitcoindConn.Start(); err != nil {
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return nil, fmt.Errorf("unable to connect to bitcoind: "+
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"%v", err)
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}
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cc.chainNotifier = bitcoindnotify.New(
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bitcoindConn, activeNetParams.Params, hintCache, hintCache,
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)
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cc.chainView = chainview.NewBitcoindFilteredChainView(bitcoindConn)
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walletConfig.ChainSource = bitcoindConn.NewBitcoindClient()
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// If we're not in regtest mode, then we'll attempt to use a
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// proper fee estimator for testnet.
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rpcConfig := &rpcclient.ConnConfig{
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Host: bitcoindHost,
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User: bitcoindMode.RPCUser,
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Pass: bitcoindMode.RPCPass,
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DisableConnectOnNew: true,
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DisableAutoReconnect: false,
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DisableTLS: true,
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HTTPPostMode: true,
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}
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if cfg.Bitcoin.Active && !cfg.Bitcoin.RegTest {
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ltndLog.Infof("Initializing bitcoind backed fee estimator in "+
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"%s mode", bitcoindMode.EstimateMode)
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// Finally, we'll re-initialize the fee estimator, as
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// if we're using bitcoind as a backend, then we can
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// use live fee estimates, rather than a statically
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// coded value.
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fallBackFeeRate := chainfee.SatPerKVByte(25 * 1000)
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cc.feeEstimator, err = chainfee.NewBitcoindEstimator(
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*rpcConfig, bitcoindMode.EstimateMode,
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fallBackFeeRate.FeePerKWeight(),
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)
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if err != nil {
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return nil, err
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}
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if err := cc.feeEstimator.Start(); err != nil {
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return nil, err
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}
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} else if cfg.Litecoin.Active && !cfg.Litecoin.RegTest {
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ltndLog.Infof("Initializing litecoind backed fee estimator in "+
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"%s mode", bitcoindMode.EstimateMode)
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// Finally, we'll re-initialize the fee estimator, as
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// if we're using litecoind as a backend, then we can
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// use live fee estimates, rather than a statically
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// coded value.
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fallBackFeeRate := chainfee.SatPerKVByte(25 * 1000)
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cc.feeEstimator, err = chainfee.NewBitcoindEstimator(
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*rpcConfig, bitcoindMode.EstimateMode,
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fallBackFeeRate.FeePerKWeight(),
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)
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if err != nil {
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return nil, err
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}
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if err := cc.feeEstimator.Start(); err != nil {
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return nil, err
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}
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}
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case "btcd", "ltcd":
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// Otherwise, we'll be speaking directly via RPC to a node.
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//
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// So first we'll load btcd/ltcd's TLS cert for the RPC
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// connection. If a raw cert was specified in the config, then
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// we'll set that directly. Otherwise, we attempt to read the
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// cert from the path specified in the config.
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var btcdMode *btcdConfig
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switch {
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case cfg.Bitcoin.Active:
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btcdMode = cfg.BtcdMode
|
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case cfg.Litecoin.Active:
|
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btcdMode = cfg.LtcdMode
|
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}
|
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var rpcCert []byte
|
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if btcdMode.RawRPCCert != "" {
|
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rpcCert, err = hex.DecodeString(btcdMode.RawRPCCert)
|
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if err != nil {
|
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return nil, err
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}
|
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} else {
|
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certFile, err := os.Open(btcdMode.RPCCert)
|
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if err != nil {
|
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return nil, err
|
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}
|
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rpcCert, err = ioutil.ReadAll(certFile)
|
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if err != nil {
|
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return nil, err
|
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}
|
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if err := certFile.Close(); err != nil {
|
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return nil, err
|
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}
|
|
}
|
|
|
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// If the specified host for the btcd/ltcd RPC server already
|
|
// has a port specified, then we use that directly. Otherwise,
|
|
// we assume the default port according to the selected chain
|
|
// parameters.
|
|
var btcdHost string
|
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if strings.Contains(btcdMode.RPCHost, ":") {
|
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btcdHost = btcdMode.RPCHost
|
|
} else {
|
|
btcdHost = fmt.Sprintf("%v:%v", btcdMode.RPCHost,
|
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activeNetParams.rpcPort)
|
|
}
|
|
|
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btcdUser := btcdMode.RPCUser
|
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btcdPass := btcdMode.RPCPass
|
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rpcConfig := &rpcclient.ConnConfig{
|
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Host: btcdHost,
|
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Endpoint: "ws",
|
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User: btcdUser,
|
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Pass: btcdPass,
|
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Certificates: rpcCert,
|
|
DisableTLS: false,
|
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DisableConnectOnNew: true,
|
|
DisableAutoReconnect: false,
|
|
}
|
|
cc.chainNotifier, err = btcdnotify.New(
|
|
rpcConfig, activeNetParams.Params, hintCache, hintCache,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
// Finally, we'll create an instance of the default chain view to be
|
|
// used within the routing layer.
|
|
cc.chainView, err = chainview.NewBtcdFilteredChainView(*rpcConfig)
|
|
if err != nil {
|
|
srvrLog.Errorf("unable to create chain view: %v", err)
|
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return nil, err
|
|
}
|
|
|
|
// Create a special websockets rpc client for btcd which will be used
|
|
// by the wallet for notifications, calls, etc.
|
|
chainRPC, err := chain.NewRPCClient(activeNetParams.Params, btcdHost,
|
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btcdUser, btcdPass, rpcCert, false, 20)
|
|
if err != nil {
|
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return nil, err
|
|
}
|
|
|
|
walletConfig.ChainSource = chainRPC
|
|
|
|
// If we're not in simnet or regtest mode, then we'll attempt
|
|
// to use a proper fee estimator for testnet.
|
|
if !cfg.Bitcoin.SimNet && !cfg.Litecoin.SimNet &&
|
|
!cfg.Bitcoin.RegTest && !cfg.Litecoin.RegTest {
|
|
|
|
ltndLog.Infof("Initializing btcd backed fee estimator")
|
|
|
|
// Finally, we'll re-initialize the fee estimator, as
|
|
// if we're using btcd as a backend, then we can use
|
|
// live fee estimates, rather than a statically coded
|
|
// value.
|
|
fallBackFeeRate := chainfee.SatPerKVByte(25 * 1000)
|
|
cc.feeEstimator, err = chainfee.NewBtcdEstimator(
|
|
*rpcConfig, fallBackFeeRate.FeePerKWeight(),
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if err := cc.feeEstimator.Start(); err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
default:
|
|
return nil, fmt.Errorf("unknown node type: %s",
|
|
homeChainConfig.Node)
|
|
}
|
|
|
|
wc, err := btcwallet.New(*walletConfig)
|
|
if err != nil {
|
|
fmt.Printf("unable to create wallet controller: %v\n", err)
|
|
return nil, err
|
|
}
|
|
|
|
cc.msgSigner = wc
|
|
cc.signer = wc
|
|
cc.chainIO = wc
|
|
cc.wc = wc
|
|
|
|
// Select the default channel constraints for the primary chain.
|
|
channelConstraints := defaultBtcChannelConstraints
|
|
if registeredChains.PrimaryChain() == litecoinChain {
|
|
channelConstraints = defaultLtcChannelConstraints
|
|
}
|
|
|
|
keyRing := keychain.NewBtcWalletKeyRing(
|
|
wc.InternalWallet(), activeNetParams.CoinType,
|
|
)
|
|
cc.keyRing = keyRing
|
|
|
|
// Create, and start the lnwallet, which handles the core payment
|
|
// channel logic, and exposes control via proxy state machines.
|
|
walletCfg := lnwallet.Config{
|
|
Database: chanDB,
|
|
Notifier: cc.chainNotifier,
|
|
WalletController: wc,
|
|
Signer: cc.signer,
|
|
FeeEstimator: cc.feeEstimator,
|
|
SecretKeyRing: keyRing,
|
|
ChainIO: cc.chainIO,
|
|
DefaultConstraints: channelConstraints,
|
|
NetParams: *activeNetParams.Params,
|
|
}
|
|
lnWallet, err := lnwallet.NewLightningWallet(walletCfg)
|
|
if err != nil {
|
|
fmt.Printf("unable to create wallet: %v\n", err)
|
|
return nil, err
|
|
}
|
|
if err := lnWallet.Startup(); err != nil {
|
|
fmt.Printf("unable to start wallet: %v\n", err)
|
|
return nil, err
|
|
}
|
|
|
|
ltndLog.Info("LightningWallet opened")
|
|
|
|
cc.wallet = lnWallet
|
|
|
|
return cc, nil
|
|
}
|
|
|
|
var (
|
|
// bitcoinTestnetGenesis is the genesis hash of Bitcoin's testnet
|
|
// chain.
|
|
bitcoinTestnetGenesis = chainhash.Hash([chainhash.HashSize]byte{
|
|
0x43, 0x49, 0x7f, 0xd7, 0xf8, 0x26, 0x95, 0x71,
|
|
0x08, 0xf4, 0xa3, 0x0f, 0xd9, 0xce, 0xc3, 0xae,
|
|
0xba, 0x79, 0x97, 0x20, 0x84, 0xe9, 0x0e, 0xad,
|
|
0x01, 0xea, 0x33, 0x09, 0x00, 0x00, 0x00, 0x00,
|
|
})
|
|
|
|
// bitcoinMainnetGenesis is the genesis hash of Bitcoin's main chain.
|
|
bitcoinMainnetGenesis = chainhash.Hash([chainhash.HashSize]byte{
|
|
0x6f, 0xe2, 0x8c, 0x0a, 0xb6, 0xf1, 0xb3, 0x72,
|
|
0xc1, 0xa6, 0xa2, 0x46, 0xae, 0x63, 0xf7, 0x4f,
|
|
0x93, 0x1e, 0x83, 0x65, 0xe1, 0x5a, 0x08, 0x9c,
|
|
0x68, 0xd6, 0x19, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
})
|
|
|
|
// litecoinTestnetGenesis is the genesis hash of Litecoin's testnet4
|
|
// chain.
|
|
litecoinTestnetGenesis = chainhash.Hash([chainhash.HashSize]byte{
|
|
0xa0, 0x29, 0x3e, 0x4e, 0xeb, 0x3d, 0xa6, 0xe6,
|
|
0xf5, 0x6f, 0x81, 0xed, 0x59, 0x5f, 0x57, 0x88,
|
|
0x0d, 0x1a, 0x21, 0x56, 0x9e, 0x13, 0xee, 0xfd,
|
|
0xd9, 0x51, 0x28, 0x4b, 0x5a, 0x62, 0x66, 0x49,
|
|
})
|
|
|
|
// litecoinMainnetGenesis is the genesis hash of Litecoin's main chain.
|
|
litecoinMainnetGenesis = chainhash.Hash([chainhash.HashSize]byte{
|
|
0xe2, 0xbf, 0x04, 0x7e, 0x7e, 0x5a, 0x19, 0x1a,
|
|
0xa4, 0xef, 0x34, 0xd3, 0x14, 0x97, 0x9d, 0xc9,
|
|
0x98, 0x6e, 0x0f, 0x19, 0x25, 0x1e, 0xda, 0xba,
|
|
0x59, 0x40, 0xfd, 0x1f, 0xe3, 0x65, 0xa7, 0x12,
|
|
})
|
|
|
|
// chainMap is a simple index that maps a chain's genesis hash to the
|
|
// chainCode enum for that chain.
|
|
chainMap = map[chainhash.Hash]chainCode{
|
|
bitcoinTestnetGenesis: bitcoinChain,
|
|
litecoinTestnetGenesis: litecoinChain,
|
|
|
|
bitcoinMainnetGenesis: bitcoinChain,
|
|
litecoinMainnetGenesis: litecoinChain,
|
|
}
|
|
|
|
// chainDNSSeeds is a map of a chain's hash to the set of DNS seeds
|
|
// that will be use to bootstrap peers upon first startup.
|
|
//
|
|
// The first item in the array is the primary host we'll use to attempt
|
|
// the SRV lookup we require. If we're unable to receive a response
|
|
// over UDP, then we'll fall back to manual TCP resolution. The second
|
|
// item in the array is a special A record that we'll query in order to
|
|
// receive the IP address of the current authoritative DNS server for
|
|
// the network seed.
|
|
//
|
|
// TODO(roasbeef): extend and collapse these and chainparams.go into
|
|
// struct like chaincfg.Params
|
|
chainDNSSeeds = map[chainhash.Hash][][2]string{
|
|
bitcoinMainnetGenesis: {
|
|
{
|
|
"nodes.lightning.directory",
|
|
"soa.nodes.lightning.directory",
|
|
},
|
|
{
|
|
"lseed.bitcoinstats.com",
|
|
},
|
|
},
|
|
|
|
bitcoinTestnetGenesis: {
|
|
{
|
|
"test.nodes.lightning.directory",
|
|
"soa.nodes.lightning.directory",
|
|
},
|
|
},
|
|
|
|
litecoinMainnetGenesis: {
|
|
{
|
|
"ltc.nodes.lightning.directory",
|
|
"soa.nodes.lightning.directory",
|
|
},
|
|
},
|
|
}
|
|
)
|
|
|
|
// chainRegistry keeps track of the current chains
|
|
type chainRegistry struct {
|
|
sync.RWMutex
|
|
|
|
activeChains map[chainCode]*chainControl
|
|
netParams map[chainCode]*bitcoinNetParams
|
|
|
|
primaryChain chainCode
|
|
}
|
|
|
|
// newChainRegistry creates a new chainRegistry.
|
|
func newChainRegistry() *chainRegistry {
|
|
return &chainRegistry{
|
|
activeChains: make(map[chainCode]*chainControl),
|
|
netParams: make(map[chainCode]*bitcoinNetParams),
|
|
}
|
|
}
|
|
|
|
// RegisterChain assigns an active chainControl instance to a target chain
|
|
// identified by its chainCode.
|
|
func (c *chainRegistry) RegisterChain(newChain chainCode, cc *chainControl) {
|
|
c.Lock()
|
|
c.activeChains[newChain] = cc
|
|
c.Unlock()
|
|
}
|
|
|
|
// LookupChain attempts to lookup an active chainControl instance for the
|
|
// target chain.
|
|
func (c *chainRegistry) LookupChain(targetChain chainCode) (*chainControl, bool) {
|
|
c.RLock()
|
|
cc, ok := c.activeChains[targetChain]
|
|
c.RUnlock()
|
|
return cc, ok
|
|
}
|
|
|
|
// LookupChainByHash attempts to look up an active chainControl which
|
|
// corresponds to the passed genesis hash.
|
|
func (c *chainRegistry) LookupChainByHash(chainHash chainhash.Hash) (*chainControl, bool) {
|
|
c.RLock()
|
|
defer c.RUnlock()
|
|
|
|
targetChain, ok := chainMap[chainHash]
|
|
if !ok {
|
|
return nil, ok
|
|
}
|
|
|
|
cc, ok := c.activeChains[targetChain]
|
|
return cc, ok
|
|
}
|
|
|
|
// RegisterPrimaryChain sets a target chain as the "home chain" for lnd.
|
|
func (c *chainRegistry) RegisterPrimaryChain(cc chainCode) {
|
|
c.Lock()
|
|
defer c.Unlock()
|
|
|
|
c.primaryChain = cc
|
|
}
|
|
|
|
// PrimaryChain returns the primary chain for this running lnd instance. The
|
|
// primary chain is considered the "home base" while the other registered
|
|
// chains are treated as secondary chains.
|
|
func (c *chainRegistry) PrimaryChain() chainCode {
|
|
c.RLock()
|
|
defer c.RUnlock()
|
|
|
|
return c.primaryChain
|
|
}
|
|
|
|
// ActiveChains returns a slice containing the active chains.
|
|
func (c *chainRegistry) ActiveChains() []chainCode {
|
|
c.RLock()
|
|
defer c.RUnlock()
|
|
|
|
chains := make([]chainCode, 0, len(c.activeChains))
|
|
for activeChain := range c.activeChains {
|
|
chains = append(chains, activeChain)
|
|
}
|
|
|
|
return chains
|
|
}
|
|
|
|
// NumActiveChains returns the total number of active chains.
|
|
func (c *chainRegistry) NumActiveChains() uint32 {
|
|
c.RLock()
|
|
defer c.RUnlock()
|
|
|
|
return uint32(len(c.activeChains))
|
|
}
|
|
|
|
// initNeutrinoBackend inits a new instance of the neutrino light client
|
|
// backend given a target chain directory to store the chain state.
|
|
func initNeutrinoBackend(chainDir string) (*neutrino.ChainService, func(), error) {
|
|
// First we'll open the database file for neutrino, creating the
|
|
// database if needed. We append the normalized network name here to
|
|
// match the behavior of btcwallet.
|
|
dbPath := filepath.Join(
|
|
chainDir,
|
|
normalizeNetwork(activeNetParams.Name),
|
|
)
|
|
|
|
// Ensure that the neutrino db path exists.
|
|
if err := os.MkdirAll(dbPath, 0700); err != nil {
|
|
return nil, nil, err
|
|
}
|
|
|
|
dbName := filepath.Join(dbPath, "neutrino.db")
|
|
db, err := walletdb.Create("bdb", dbName, !cfg.SyncFreelist)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("unable to create neutrino "+
|
|
"database: %v", err)
|
|
}
|
|
|
|
headerStateAssertion, err := parseHeaderStateAssertion(
|
|
cfg.NeutrinoMode.AssertFilterHeader,
|
|
)
|
|
if err != nil {
|
|
db.Close()
|
|
return nil, nil, err
|
|
}
|
|
|
|
// With the database open, we can now create an instance of the
|
|
// neutrino light client. We pass in relevant configuration parameters
|
|
// required.
|
|
config := neutrino.Config{
|
|
DataDir: dbPath,
|
|
Database: db,
|
|
ChainParams: *activeNetParams.Params,
|
|
AddPeers: cfg.NeutrinoMode.AddPeers,
|
|
ConnectPeers: cfg.NeutrinoMode.ConnectPeers,
|
|
Dialer: func(addr net.Addr) (net.Conn, error) {
|
|
return cfg.net.Dial(addr.Network(), addr.String())
|
|
},
|
|
NameResolver: func(host string) ([]net.IP, error) {
|
|
addrs, err := cfg.net.LookupHost(host)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
ips := make([]net.IP, 0, len(addrs))
|
|
for _, strIP := range addrs {
|
|
ip := net.ParseIP(strIP)
|
|
if ip == nil {
|
|
continue
|
|
}
|
|
|
|
ips = append(ips, ip)
|
|
}
|
|
|
|
return ips, nil
|
|
},
|
|
AssertFilterHeader: headerStateAssertion,
|
|
}
|
|
|
|
neutrino.MaxPeers = 8
|
|
neutrino.BanDuration = time.Hour * 48
|
|
|
|
neutrinoCS, err := neutrino.NewChainService(config)
|
|
if err != nil {
|
|
db.Close()
|
|
return nil, nil, fmt.Errorf("unable to create neutrino light "+
|
|
"client: %v", err)
|
|
}
|
|
|
|
if err := neutrinoCS.Start(); err != nil {
|
|
db.Close()
|
|
return nil, nil, err
|
|
}
|
|
|
|
cleanUp := func() {
|
|
neutrinoCS.Stop()
|
|
db.Close()
|
|
}
|
|
|
|
return neutrinoCS, cleanUp, nil
|
|
}
|
|
|
|
// parseHeaderStateAssertion parses the user-specified neutrino header state
|
|
// into a headerfs.FilterHeader.
|
|
func parseHeaderStateAssertion(state string) (*headerfs.FilterHeader, error) {
|
|
if len(state) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
split := strings.Split(state, ":")
|
|
if len(split) != 2 {
|
|
return nil, fmt.Errorf("header state assertion %v in "+
|
|
"unexpected format, expected format height:hash", state)
|
|
}
|
|
|
|
height, err := strconv.ParseUint(split[0], 10, 32)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid filter header height: %v", err)
|
|
}
|
|
|
|
hash, err := chainhash.NewHashFromStr(split[1])
|
|
if err != nil {
|
|
return nil, fmt.Errorf("invalid filter header hash: %v", err)
|
|
}
|
|
|
|
return &headerfs.FilterHeader{
|
|
Height: uint32(height),
|
|
FilterHash: *hash,
|
|
}, nil
|
|
}
|