lnd.xprv/watchtower/wtmock/peer.go

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package wtmock
import (
"fmt"
"net"
"time"
"github.com/btcsuite/btcd/btcec"
"github.com/lightningnetwork/lnd/watchtower/wtserver"
)
// MockPeer emulates a single endpoint of brontide transport.
type MockPeer struct {
remotePub *btcec.PublicKey
remoteAddr net.Addr
IncomingMsgs chan []byte
OutgoingMsgs chan []byte
writeDeadline <-chan time.Time
readDeadline <-chan time.Time
Quit chan struct{}
}
// NewMockPeer returns a fresh MockPeer.
func NewMockPeer(pk *btcec.PublicKey, addr net.Addr, bufferSize int) *MockPeer {
return &MockPeer{
remotePub: pk,
remoteAddr: addr,
IncomingMsgs: make(chan []byte, bufferSize),
OutgoingMsgs: make(chan []byte, bufferSize),
Quit: make(chan struct{}),
}
}
// Write sends the raw bytes as the next full message read to the remote peer.
// The write will fail if either party closes the connection or the write
// deadline expires. The passed bytes slice is copied before sending, thus the
// bytes may be reused once the method returns.
func (p *MockPeer) Write(b []byte) (n int, err error) {
select {
case p.OutgoingMsgs <- b:
return len(b), nil
case <-p.writeDeadline:
return 0, fmt.Errorf("write timeout expired")
case <-p.Quit:
return 0, fmt.Errorf("connection closed")
}
}
// Close tearsdown the connection, and fails any pending reads or writes.
func (p *MockPeer) Close() error {
select {
case <-p.Quit:
return fmt.Errorf("connection already closed")
default:
close(p.Quit)
return nil
}
}
// ReadNextMessage returns the raw bytes of the next full message read from the
// remote peer. The read will fail if either party closes the connection or the
// read deadline expires.
func (p *MockPeer) ReadNextMessage() ([]byte, error) {
select {
case b := <-p.IncomingMsgs:
return b, nil
case <-p.readDeadline:
return nil, fmt.Errorf("read timeout expired")
case <-p.Quit:
return nil, fmt.Errorf("connection closed")
}
}
// SetWriteDeadline initializes a timer that will cause any pending writes to
// fail at time t. If t is zero, the deadline is infinite.
func (p *MockPeer) SetWriteDeadline(t time.Time) error {
if t.IsZero() {
p.writeDeadline = nil
return nil
}
duration := time.Until(t)
p.writeDeadline = time.After(duration)
return nil
}
// SetReadDeadline initializes a timer that will cause any pending reads to fail
// at time t. If t is zero, the deadline is infinite.
func (p *MockPeer) SetReadDeadline(t time.Time) error {
if t.IsZero() {
p.readDeadline = nil
return nil
}
duration := time.Until(t)
p.readDeadline = time.After(duration)
return nil
}
// RemotePub returns the public key of the remote peer.
func (p *MockPeer) RemotePub() *btcec.PublicKey {
return p.remotePub
}
// RemoteAddr returns the net address of the remote peer.
func (p *MockPeer) RemoteAddr() net.Addr {
return p.remoteAddr
}
// Compile-time constraint ensuring the MockPeer implements the wserver.Peer
// interface.
var _ wtserver.Peer = (*MockPeer)(nil)