node/pkg/p2p: Prevent potential nil pointer dereference when processing heartbeats
Resolves the problem occurring when dereferencing a nil `gk *ecdsa.PublicKey` during heartbeat processing. This issue arises when non-guardian processes utilizing the p2p package set the key to `nil`.
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@ -607,7 +607,7 @@ func Run(
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zap.String("from", envelope.GetFrom().String()))
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} else {
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guardianAddr := eth_common.BytesToAddress(s.GuardianAddr)
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if guardianAddr != ethcrypto.PubkeyToAddress(gk.PublicKey) {
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if gk == nil || guardianAddr != ethcrypto.PubkeyToAddress(gk.PublicKey) {
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prevPeerId, ok := components.ProtectedHostByGuardianKey[guardianAddr]
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if ok {
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if prevPeerId != peerId {
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