renewal

type CertificateStore interface {
	StoreCertificate(ctx context.Context, certPEM []byte) error
}

type Config struct {
	CurrentCert *x509.Certificate
	PrivateKey  ed25519.PrivateKey
	Store       CertificateStore
	Connections ConnectionProvider
	Logger      *slog.Logger
}

type ConnectionProvider interface {
	// GetConnection returns a gRPC connection to any available shard.
	// It may establish a new connection or return an existing one.
	GetConnection(ctx context.Context) (conn *grpc.ClientConn, shard string, err error)
}