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< ol class = "chapter" > < li class = "chapter-item expanded " > < a href = "Hole.html" > < strong aria-hidden = "true" > 1.< / strong > How it works< / a > < / li > < li > < ol class = "section" > < li class = "chapter-item expanded " > < a href = "Message-flow.html" class = "active" > < strong aria-hidden = "true" > 1.1.< / strong > Message flow< / a > < / li > < / ol > < / li > < li class = "chapter-item expanded " > < a href = "Protocol.html" > < strong aria-hidden = "true" > 2.< / strong > Protocol description< / a > < / li > < li class = "chapter-item expanded " > < a href = "API.html" > < strong aria-hidden = "true" > 3.< / strong > Frontend API< / a > < / li > < / ol >
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< h1 id = "message-flow" > < a class = "header" href = "#message-flow" > Message flow< / a > < / h1 >
< p > < em > (pseudocode in Bash style)< / em > < / p >
< p > Hole receiving messages by looking for new items in " user's bin" (place where new messages arrives). Because of how freenet works, we can't just say " Hey! Do I have new messages?" , we can specify messages index like: " Hey! Gimme 15th message" . Thus we must remember previous message index and to receive the new message we're requesting for 16th message, if we was able to get 15th message.< / p >
< p > That's mean, what interlocutor also have to know the last message index in our bin. But < strong > how he can know it, if there's a lot of other users who also sending messages to our bin?< / strong > Of course, you can try to receive all messages from the index, you had last remembered, and next index, next, next... until you find the index which does not exist. But it's a freenet, it's take too much time;< / p >
< p > The solution is unique Id. User creating and giving his/her unique id to each new interlocutor. And when, if interlocutor sending the message he knows, that last message to us had index < code > $N< / code > and sends message with index < code > $N+1< / code > , if be more verbose, the new message index he send to us will look like < code > " $(ID)_($N+1)" < / code > < / p >
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