func (nd *Node) Dial(peerHash, protocol string) (net.Conn, error) {
peerID, err := peer.IDB58Decode(peerHash)
if err != nil {
return nil, err
}
stream, err := corenet.Dial(nd.ipfsNode, peerID, protocol)
if err != nil {
return nil, err
}
return wrapStream(stream), nil
}
func (nd *Node) PublicKeyFor(peerHash string) (security.PubKey, error) {
node, err := nd.proc()
if err != nil {
return nil, err
}
peerID, err := peer.IDB58Decode(peerHash)
if err != nil {
return nil, err
}
pub := node.Peerstore.PubKey(peerID)
if pub == nil {
return nil, fmt.Errorf("No public key for `%s`", peerHash)
}
return pub, nil
}
// Ping returns a new Pinger. It can be used to
// query the time the remote was last seen. It will be
// constantly updated until close is called on it.
func (nd *Node) Ping(peerHash string) (*Pinger, error) {
if !nd.IsOnline() {
return nil, fmt.Errorf("Not online") // TODO: common error?
}
node, err := nd.proc()
if err != nil {
return nil, err
}
peerID, err := peer.IDB58Decode(peerHash)
if err != nil {
return nil, err
}
ctx, cancel := context.WithCancel(nd.Context)
pingCh, err := node.Ping.Ping(ctx, peerID)
if err != nil {
return nil, err
}
pinger := &Pinger{
lastSeen: time.Now(),
cancel: cancel,
}
go func() {
for roundtrip := range pingCh {
pinger.mu.Lock()
pinger.roundtrip = roundtrip
pinger.lastSeen = time.Now()
pinger.mu.Unlock()
}
}()
return pinger, nil
}