55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
package peers
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import (
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"sync"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/p2p"
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"github.com/ethereum/go-ethereum/p2p/discv5"
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)
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// Register manages register topic queries
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type Register struct {
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topics []discv5.Topic
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wg sync.WaitGroup
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quit chan struct{}
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}
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// NewRegister creates instance of topic register
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func NewRegister(topics ...discv5.Topic) *Register {
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return &Register{topics: topics}
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}
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// Start topic register query for every topic
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func (r *Register) Start(server *p2p.Server) error {
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if server.DiscV5 == nil {
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return ErrDiscv5NotRunning
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}
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r.quit = make(chan struct{})
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for _, topic := range r.topics {
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r.wg.Add(1)
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go func(t discv5.Topic) {
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log.Debug("v5 register topic", "topic", t)
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server.DiscV5.RegisterTopic(t, r.quit)
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r.wg.Done()
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}(topic)
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}
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return nil
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}
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// Stop all register topic queries and waits for them to exit
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func (r *Register) Stop() {
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if r.quit == nil {
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return
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}
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select {
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case <-r.quit:
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return
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default:
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close(r.quit)
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}
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log.Debug("waiting for register queries to exit")
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r.wg.Wait()
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}
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