Documentation
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Index ¶
Constants ¶
This section is empty.
Variables ¶
var ( // ErrPeerAlreadyConnected signals that a peer with the same session id // is already active within the server. ErrPeerAlreadyConnected = errors.New("peer already connected") // ErrServerExiting signals that a request could not be processed // because the server has been requested to shut down. ErrServerExiting = errors.New("server shutting down") )
Functions ¶
func DisableLog ¶
func DisableLog()
DisableLog disables all library log output. Logging output is disabled by default until UseLogger is called.
Types ¶
type Config ¶
type Config struct {
// DB provides persistent access to the server's sessions and for
// storing state updates.
DB DB
// NodeKeyECDH is the the ECDH capable wrapper of the key to be used in
// accepting new brontide connections.
NodeKeyECDH keychain.SingleKeyECDH
// Listeners specifies which address to which clients may connect.
Listeners []net.Listener
// 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
// NewAddress is used to generate reward addresses, where a cut of
// successfully sent funds can be received.
NewAddress func() (btcutil.Address, error)
// ChainHash identifies the network that the server is watching.
ChainHash chainhash.Hash
// NoAckCreateSession causes the server to not reply to create session
// requests, this should only be used for testing.
NoAckCreateSession bool
// NoAckUpdates causes the server to not acknowledge state updates, this
// should only be used for testing.
NoAckUpdates bool
// DisableReward causes the server to reject any session creation
// attempts that request rewards.
DisableReward bool
}
Config abstracts the primary components and dependencies of the server.
type DB ¶
type DB interface {
// InsertSessionInfo saves a newly agreed-upon session from a client.
// This method should fail if a session with the same session id already
// exists.
InsertSessionInfo(*wtdb.SessionInfo) error
// GetSessionInfo retrieves the SessionInfo associated with the session
// id, if it exists.
GetSessionInfo(*wtdb.SessionID) (*wtdb.SessionInfo, error)
// InsertStateUpdate persists a state update sent by a client, and
// validates the update against the current SessionInfo stored under the
// update's session id..
InsertStateUpdate(*wtdb.SessionStateUpdate) (uint16, error)
// DeleteSession removes all data associated with a particular session
// id from the tower's database.
DeleteSession(wtdb.SessionID) error
}
DB provides the server access to session creation and retrieval, as well as persisting state updates sent by clients.
type Interface ¶
type Interface interface {
// InboundPeerConnected accepts a new watchtower client, and handles any
// requests sent by the peer.
InboundPeerConnected(Peer)
// Start sets up the watchtower server.
Start() error
// Stop cleans up the watchtower's current connections and resources.
Stop() error
}
Interface represents a simple, listen-only service that accepts watchtower clients, and provides responses to their requests.
type Peer ¶
type Peer interface {
io.WriteCloser
// ReadNextMessage pulls the next framed message from the client.
ReadNextMessage() ([]byte, error)
// SetWriteDeadline specifies the time by which the client must have
// read a message sent by the server. In practice, the connection is
// buffered, so the client must read enough from the connection to
// support the server adding another reply.
SetWriteDeadline(time.Time) error
// SetReadDeadline specifies the time by which the client must send
// another message.
SetReadDeadline(time.Time) error
// RemotePub returns the client's public key.
RemotePub() *btcec.PublicKey
// RemoteAddr returns the client's network address.
RemoteAddr() net.Addr
}
Peer is the primary interface used to abstract watchtower clients.
type Server ¶
type Server struct {
// contains filtered or unexported fields
}
Server houses the state required to handle watchtower peers. It's primary job is to accept incoming connections, and dispatch processing of the client message streams.
func New ¶
New creates a new server to handle watchtower clients. The server will accept clients connecting to the listener addresses, and allows them to open sessions and send state updates.
func (*Server) InboundPeerConnected ¶
InboundPeerConnected accepts a server.Peer, and handles the request submitted by the client. This method serves also as a public endpoint for locally registering new clients with the server.
Source Files