package memberlist
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import "time"
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// PingDelegate is used to notify an observer how long it took for a ping message to
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// complete a round trip. It can also be used for writing arbitrary byte slices
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// into ack messages. Note that in order to be meaningful for RTT estimates, this
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// delegate does not apply to indirect pings, nor fallback pings sent over TCP.
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type PingDelegate interface {
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// AckPayload is invoked when an ack is being sent; the returned bytes will be appended to the ack
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AckPayload() []byte
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// NotifyPing is invoked when an ack for a ping is received
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NotifyPingComplete(other *Node, rtt time.Duration, payload []byte)
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}
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