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pubsub.go
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/
pubsub.go
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package shell
import (
"encoding/json"
"github.com/libp2p/go-libp2p-peer"
)
type Message struct {
From peer.ID `json:"from,omitempty"`
Data []byte `json:"data,omitempty"`
Seqno []byte `json:"seqno,omitempty"`
TopicIDs []string `json:"topicIDs,omitempty"`
}
// PubSubSubscription allow you to receive pubsub records that where published on the network.
type PubSubSubscription struct {
resp *Response
}
func newPubSubSubscription(resp *Response) *PubSubSubscription {
sub := &PubSubSubscription{
resp: resp,
}
return sub
}
// Next waits for the next record and returns that.
func (s *PubSubSubscription) Next() (*Message, error) {
if s.resp.Error != nil {
return nil, s.resp.Error
}
d := json.NewDecoder(s.resp.Output)
var r Message
err := d.Decode(&r)
return &r, err
}
// Cancel cancels the given subscription.
func (s *PubSubSubscription) Cancel() error {
if s.resp.Output == nil {
return nil
}
return s.resp.Output.Close()
}