lnd.xprv/watchtower/config.go

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package watchtower
import (
"fmt"
"net"
"time"
"github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/lightningnetwork/lnd/tor"
"github.com/lightningnetwork/lnd/watchtower/lookout"
)
const (
// DefaultPeerPort is the default server port to which clients can
// connect.
DefaultPeerPort = 9911
// DefaultReadTimeout is the default timeout after which the tower will
// hang up on a client if nothing is received.
DefaultReadTimeout = 15 * time.Second
// DefaultWriteTimeout is the default timeout after which the tower will
// hang up on a client if it is unable to send a message.
DefaultWriteTimeout = 15 * time.Second
)
var (
// DefaultListenAddr is the default watchtower address listening on all
// interfaces.
DefaultListenAddr = fmt.Sprintf(":%d", DefaultPeerPort)
)
// Config defines the resources and parameters used to configure a Watchtower.
// All nil-able elements besides tor-related ones must be set in order for the
// Watchtower to function properly.
type Config struct {
// ChainHash identifies the chain that the watchtower will be monitoring
// for breaches and that will be advertised in the server's Init message
// to inbound clients.
ChainHash chainhash.Hash
// BlockFetcher supports the ability to fetch blocks from the network by
// hash.
BlockFetcher lookout.BlockFetcher
// DB provides access to persistent storage of sessions and state
// updates uploaded by watchtower clients, and the ability to query for
// breach hints when receiving new blocks.
DB DB
// EpochRegistrar supports the ability to register for events
// corresponding to newly created blocks.
EpochRegistrar lookout.EpochRegistrar
// Net specifies the network type that the watchtower will use to listen
// for client connections. Either a clear net or Tor are supported.
Net tor.Net
// NewAddress is used to generate reward addresses, where a cut of
// successfully sent funds can be received.
NewAddress func() (btcutil.Address, error)
// NodePrivKey is private key to be used in accepting new brontide
// connections.
NodePrivKey *btcec.PrivateKey
// PublishTx provides the ability to send a signed transaction to the
// network.
//
// TODO(conner): replace with lnwallet.WalletController interface to
// have stronger guarantees wrt. returned error types.
PublishTx func(*wire.MsgTx) error
// ListenAddrs specifies the listening addresses of the tower.
ListenAddrs []net.Addr
// ExternalIPs specifies the addresses to which clients may connect to
// the tower.
ExternalIPs []net.Addr
// ReadTimeout specifies how long a client may go without sending a
// message.
ReadTimeout time.Duration
// WriteTimeout specifies how long a client may go without reading a
// message from the other end, if the connection has stopped buffering
// the server's replies.
WriteTimeout time.Duration
// TorController allows the watchtower to optionally setup an onion hidden
// service.
TorController *tor.Controller
// WatchtowerKeyPath allows the watchtower to specify where the private key
// for a watchtower hidden service should be stored.
WatchtowerKeyPath string
// Type specifies the hidden service type (V2 or V3) that the watchtower
// will create.
Type tor.OnionType
}