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update message confirmations section

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Adam Babik 2020-03-26 13:26:13 +01:00 committed by Oskar Thoren
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status-whisper-usage-spec.md
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@ -284,9 +284,9 @@ One-to-one messages are encrypted using asymmetric encryption.
## Message confirmations
Sending a message is a complex process where many things can go wrong. Message confirmations tell a node that a message originating from it has been received by its peers.
Sending a message is a complex process where many things can go wrong. Message confirmations tell a node that a message originating from it has been seen by its direct peers.
A node MAY send a message confirmation for any batch of messages received with a packet Messages Code (`0x01`).
A node MAY send a message confirmation for any batch of messages received in a packet Messages Code (`0x01`).
A message confirmation is sent using Batch Acknowledge packet (`0x0b`) or Message Response packet (`0x0c`).
@ -303,7 +303,9 @@ The Message Response packet is more complex and is followed by a Versioned Messa
The supported codes:
`1`: means time sync error which happens when an envelope is too old or created in the future (the root cause is no time sync between nodes).
The drawback of sending message confirmations is that it increases the noise in the network because for each sent message, a corresponding confirmation is broadcasted by one or more peers.
The drawback of sending message confirmations is that it increases the noise in the network because for each sent message, a corresponding confirmation is broadcasted by one or more peers. To limit that, both Batch Acknowledge packet (`0x0b`) and Message Response packet (`0x0c`) are not broadcasted to peers of the peers, i.e. they do not follow epidemic spread.
In the current Status network setup, only Mailservers support message confirmations. A client posting a message to the network and after receiving a confirmation can be sure that the message got processed by the Mailserver. If additionally, sending a message is limited to non-Mailserver peers, it also guarantees that the message got broadcasted through the network and it reached the selected Mailserver.
## Whisper V6 extensions