53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
package node
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import (
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"context"
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"errors"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/node"
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"github.com/ethereum/go-ethereum/p2p"
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)
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// All general log messages in this package should be routed through this logger.
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var logger = log.New("package", "status-go/metrics/node")
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// SubscribeServerEvents subscribes to server and listens to
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// PeerEventTypeAdd and PeerEventTypeDrop events.
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func SubscribeServerEvents(ctx context.Context, node *node.Node) error {
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server := node.Server()
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if server == nil {
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return errors.New("server is unavailable")
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}
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ch := make(chan *p2p.PeerEvent, server.MaxPeers)
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subscription := server.SubscribeEvents(ch)
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logger.Debug("Subscribed to server events")
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for {
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select {
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case event := <-ch:
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if isAddDropPeerEvent(event.Type) {
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if err := updateNodeMetrics(node, event.Type); err != nil {
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log.Error("failed to update node metrics", "err", err)
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}
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}
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case err := <-subscription.Err():
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if err != nil {
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logger.Error("Subscription failed", "err", err)
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}
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subscription.Unsubscribe()
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return err
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case <-ctx.Done():
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subscription.Unsubscribe()
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return nil
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}
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}
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}
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func isAddDropPeerEvent(eventType p2p.PeerEventType) bool {
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return eventType == p2p.PeerEventTypeAdd || eventType == p2p.PeerEventTypeDrop
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}
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