chainreg

package
v0.12.1-beta-branch Latest Latest
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 Go to latest Published: Feb 23, 2021 License: MIT Imports: 37 Imported by: 0

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Index

Constants

View Source 
const (
	// DefaultBitcoinMinHTLCInMSat is the default smallest value htlc this
	// node will accept. This value is proposed in the channel open sequence
	// and cannot be changed during the life of the channel. It is 1 msat by
	// default to allow maximum flexibility in deciding what size payments
	// to forward.
	//
	// All forwarded payments are subjected to the min htlc constraint of
	// the routing policy of the outgoing channel. This implicitly controls
	// the minimum htlc value on the incoming channel too.
	DefaultBitcoinMinHTLCInMSat = lnwire.MilliSatoshi(1)

	// DefaultBitcoinMinHTLCOutMSat is the default minimum htlc value that
	// we require for sending out htlcs. Our channel peer may have a lower
	// min htlc channel parameter, but we - by default - don't forward
	// anything under the value defined here.
	DefaultBitcoinMinHTLCOutMSat = lnwire.MilliSatoshi(1000)

	// DefaultBitcoinBaseFeeMSat is the default forwarding base fee.
	DefaultBitcoinBaseFeeMSat = lnwire.MilliSatoshi(1000)

	// DefaultBitcoinFeeRate is the default forwarding fee rate.
	DefaultBitcoinFeeRate = lnwire.MilliSatoshi(1)

	// DefaultBitcoinTimeLockDelta is the default forwarding time lock
	// delta.
	DefaultBitcoinTimeLockDelta = 40

	DefaultLitecoinMinHTLCInMSat  = lnwire.MilliSatoshi(1)
	DefaultLitecoinMinHTLCOutMSat = lnwire.MilliSatoshi(1000)
	DefaultLitecoinBaseFeeMSat    = lnwire.MilliSatoshi(1000)
	DefaultLitecoinFeeRate        = lnwire.MilliSatoshi(1)
	DefaultLitecoinTimeLockDelta  = 576
	DefaultLitecoinDustLimit      = btcutil.Amount(54600)

	// DefaultBitcoinStaticFeePerKW is the fee rate of 50 sat/vbyte
	// expressed in sat/kw.
	DefaultBitcoinStaticFeePerKW = chainfee.SatPerKWeight(12500)

	// DefaultBitcoinStaticMinRelayFeeRate is the min relay fee used for
	// static estimators.
	DefaultBitcoinStaticMinRelayFeeRate = chainfee.FeePerKwFloor

	// DefaultLitecoinStaticFeePerKW is the fee rate of 200 sat/vbyte
	// expressed in sat/kw.
	DefaultLitecoinStaticFeePerKW = chainfee.SatPerKWeight(50000)

	// BtcToLtcConversionRate is a fixed ratio used in order to scale up
	// payments when running on the Litecoin chain.
	BtcToLtcConversionRate = 60
)
View Source 
const Subsystem = "CHRE"

Subsystem defines the logging code for this subsystem.

Variables

View Source 
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,
	})

	// 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",
			},
		},
	}
)
View Source 
var BitcoinMainNetParams = BitcoinNetParams{
	Params:   &bitcoinCfg.MainNetParams,
	RPCPort:  "8334",
	CoinType: keychain.CoinTypeBitcoin,
}

BitcoinMainNetParams contains parameters specific to the current Bitcoin mainnet.

View Source 
var BitcoinRegTestNetParams = BitcoinNetParams{
	Params:   &bitcoinCfg.RegressionNetParams,
	RPCPort:  "18334",
	CoinType: keychain.CoinTypeTestnet,
}

BitcoinRegTestNetParams contains parameters specific to a local bitcoin regtest network.

View Source 
var BitcoinSimNetParams = BitcoinNetParams{
	Params:   &bitcoinCfg.SimNetParams,
	RPCPort:  "18556",
	CoinType: keychain.CoinTypeTestnet,
}

BitcoinSimNetParams contains parameters specific to the simulation test network.

View Source 
var BitcoinTestNetParams = BitcoinNetParams{
	Params:   &bitcoinCfg.TestNet3Params,
	RPCPort:  "18334",
	CoinType: keychain.CoinTypeTestnet,
}

BitcoinTestNetParams contains parameters specific to the 3rd version of the test network.

View Source 
var DefaultBtcChannelConstraints = channeldb.ChannelConstraints{
	DustLimit:        lnwallet.DefaultDustLimit(),
	MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
}

DefaultBtcChannelConstraints is the default set of channel constraints that are meant to be used when initially funding a Bitcoin channel.

TODO(halseth): make configurable at startup?

View Source 
var DefaultLtcChannelConstraints = channeldb.ChannelConstraints{
	DustLimit:        DefaultLitecoinDustLimit,
	MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
}

DefaultLtcChannelConstraints is the default set of channel constraints that are meant to be used when initially funding a Litecoin channel.

View Source 
var LitecoinMainNetParams = LitecoinNetParams{
	Params:   &litecoinCfg.MainNetParams,
	RPCPort:  "9334",
	CoinType: keychain.CoinTypeLitecoin,
}

LitecoinMainNetParams contains the parameters specific to the current Litecoin mainnet.

View Source 
var LitecoinRegTestNetParams = LitecoinNetParams{
	Params:   &litecoinCfg.RegressionNetParams,
	RPCPort:  "18334",
	CoinType: keychain.CoinTypeTestnet,
}

LitecoinRegTestNetParams contains parameters specific to a local litecoin regtest network.

View Source 
var LitecoinSimNetParams = LitecoinNetParams{
	Params:   &litecoinCfg.TestNet4Params,
	RPCPort:  "18556",
	CoinType: keychain.CoinTypeTestnet,
}

LitecoinSimNetParams contains parameters specific to the simulation test network.

View Source 
var LitecoinTestNetParams = LitecoinNetParams{
	Params:   &litecoinCfg.TestNet4Params,
	RPCPort:  "19334",
	CoinType: keychain.CoinTypeTestnet,
}

LitecoinTestNetParams contains parameters specific to the 4th version of the test network.

Functions

func ApplyLitecoinParams 

func ApplyLitecoinParams(params *BitcoinNetParams,
	litecoinParams *LitecoinNetParams)

ApplyLitecoinParams applies the relevant chain configuration parameters that differ for litecoin to the chain parameters typed for btcsuite derivation. This function is used in place of using something like interface{} to abstract over _which_ chain (or fork) the parameters are for.

func DisableLog 

func DisableLog()

DisableLog disables all logging output.

func IsTestnet 

func IsTestnet(params *BitcoinNetParams) bool

IsTestnet tests if the givern params correspond to a testnet parameter configuration.

func UseLogger 

func UseLogger(logger btclog.Logger)

UseLogger uses a specified Logger to output package logging info.

Types

type BitcoinNetParams 

type BitcoinNetParams struct {
	*bitcoinCfg.Params
	RPCPort  string
	CoinType uint32
}

BitcoinNetParams couples the p2p parameters of a network with the corresponding RPC port of a daemon running on the particular network.

type ChainCode 

type ChainCode uint32

ChainCode is an enum-like structure for keeping track of the chains currently supported within lnd. 

const (
	// BitcoinChain is Bitcoin's chain.
	BitcoinChain ChainCode = iota

	// LitecoinChain is Litecoin's chain.
	LitecoinChain
)

func (ChainCode) String 

func (c ChainCode) String() string

String returns a string representation of the target ChainCode.

type ChainControl 

type ChainControl struct {
	// ChainIO represents an abstraction over a source that can query the blockchain.
	ChainIO lnwallet.BlockChainIO

	// HealthCheck is a function which can be used to send a low-cost, fast
	// query to the chain backend to ensure we still have access to our
	// node.
	HealthCheck func() error

	// FeeEstimator is used to estimate an optimal fee for transactions important to us.
	FeeEstimator chainfee.Estimator

	// Signer is used to provide signatures over things like transactions.
	Signer input.Signer

	// KeyRing represents a set of keys that we have the private keys to.
	KeyRing keychain.SecretKeyRing

	// Wc is an abstraction over some basic wallet commands. This base set of commands
	// will be provided to the Wallet *LightningWallet raw pointer below.
	Wc lnwallet.WalletController

	// MsgSigner is used to sign arbitrary messages.
	MsgSigner lnwallet.MessageSigner

	// ChainNotifier is used to receive blockchain events that we are interested in.
	ChainNotifier chainntnfs.ChainNotifier

	// ChainView is used in the router for maintaining an up-to-date graph.
	ChainView chainview.FilteredChainView

	// Wallet is our LightningWallet that also contains the abstract Wc above. This wallet
	// handles all of the lightning operations.
	Wallet *lnwallet.LightningWallet

	// RoutingPolicy is the routing policy we have decided to use.
	RoutingPolicy htlcswitch.ForwardingPolicy

	// MinHtlcIn is the minimum HTLC we will accept.
	MinHtlcIn lnwire.MilliSatoshi
}

ChainControl couples the three primary interfaces lnd utilizes for a particular chain together. A single ChainControl instance will exist for all the chains lnd is currently active on.

func NewChainControl 

func NewChainControl(cfg *Config) (*ChainControl, error)

NewChainControl attempts to create a ChainControl instance according to the parameters in the passed configuration. Currently three branches of ChainControl instances exist: one backed by a running btcd full-node, another backed by a running bitcoind full-node, and the other backed by a running neutrino light client instance. When running with a neutrino light client instance, `neutrinoCS` must be non-nil.

type ChainRegistry 

type ChainRegistry struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

ChainRegistry keeps track of the current chains

func NewChainRegistry 

func NewChainRegistry() *ChainRegistry

NewChainRegistry creates a new ChainRegistry.

func (*ChainRegistry) ActiveChains 

func (c *ChainRegistry) ActiveChains() []ChainCode

ActiveChains returns a slice containing the active chains.

func (*ChainRegistry) LookupChain 

func (c *ChainRegistry) LookupChain(targetChain ChainCode) (
	*ChainControl, bool)

LookupChain attempts to lookup an active ChainControl instance for the target chain.

func (*ChainRegistry) LookupChainByHash 

func (c *ChainRegistry) LookupChainByHash(chainHash chainhash.Hash) (*ChainControl, bool)

LookupChainByHash attempts to look up an active ChainControl which corresponds to the passed genesis hash.

func (*ChainRegistry) NumActiveChains 

func (c *ChainRegistry) NumActiveChains() uint32

NumActiveChains returns the total number of active chains.

func (*ChainRegistry) PrimaryChain 

func (c *ChainRegistry) PrimaryChain() ChainCode

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 (*ChainRegistry) RegisterChain 

func (c *ChainRegistry) RegisterChain(newChain ChainCode,
	cc *ChainControl)

RegisterChain assigns an active ChainControl instance to a target chain identified by its ChainCode.

func (*ChainRegistry) RegisterPrimaryChain 

func (c *ChainRegistry) RegisterPrimaryChain(cc ChainCode)

RegisterPrimaryChain sets a target chain as the "home chain" for lnd.

type Config 

type Config struct {
	// Bitcoin defines settings for the Bitcoin chain.
	Bitcoin *lncfg.Chain

	// Litecoin defines settings for the Litecoin chain.
	Litecoin *lncfg.Chain

	// PrimaryChain is a function that returns our primary chain via its
	// ChainCode.
	PrimaryChain func() ChainCode

	// HeightHintCacheQueryDisable is a boolean that disables height hint
	// queries if true.
	HeightHintCacheQueryDisable bool

	// NeutrinoMode defines settings for connecting to a neutrino light-client.
	NeutrinoMode *lncfg.Neutrino

	// BitcoindMode defines settings for connecting to a bitcoind node.
	BitcoindMode *lncfg.Bitcoind

	// LitecoindMode defines settings for connecting to a litecoind node.
	LitecoindMode *lncfg.Bitcoind

	// BtcdMode defines settings for connecting to a btcd node.
	BtcdMode *lncfg.Btcd

	// LtcdMode defines settings for connecting to an ltcd node.
	LtcdMode *lncfg.Btcd

	// LocalChanDB is a pointer to the local backing channel database.
	LocalChanDB *channeldb.DB

	// RemoteChanDB is a pointer to the remote backing channel database.
	RemoteChanDB *channeldb.DB

	// PrivateWalletPw is the private wallet password to the underlying
	// btcwallet instance.
	PrivateWalletPw []byte

	// PublicWalletPw is the public wallet password to the underlying btcwallet
	// instance.
	PublicWalletPw []byte

	// Birthday specifies the time the wallet was initially created.
	Birthday time.Time

	// RecoveryWindow specifies the address look-ahead for which to scan when
	// restoring a wallet.
	RecoveryWindow uint32

	// Wallet is a pointer to the backing wallet instance.
	Wallet *wallet.Wallet

	// NeutrinoCS is a pointer to a neutrino ChainService. Must be non-nil if
	// using neutrino.
	NeutrinoCS *neutrino.ChainService

	// ActiveNetParams details the current chain we are on.
	ActiveNetParams BitcoinNetParams

	// FeeURL defines the URL for fee estimation we will use. This field is
	// optional.
	FeeURL string

	// DBTimeOut specifies the timeout value to use when opening the wallet
	// database.
	DBTimeOut time.Duration
}

Config houses necessary fields that a chainControl instance needs to function.

type LitecoinNetParams 

type LitecoinNetParams struct {
	*litecoinCfg.Params
	RPCPort  string
	CoinType uint32
}

LitecoinNetParams couples the p2p parameters of a network with the corresponding RPC port of a daemon running on the particular network.

Source Files

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