How to wait for replication to complete when opening a database? #1218
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OrbitDB's sync protocol offers various events to check for replicated records. One can intercept the interaction of other peers by capturing events such as onSynced, update, join and leave. Some examples of replication can be found in the OrbitDB unit tests as well. Look at examples such as |
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Sorry for the late reply, and thanks @haydenyoung for the suggestion! I looked into the Sync API and saw the onSynced callback you mentioned, which seems like it could help. But from what I understand, it's not something I can listen to using sync.events.on(...), so I’m not quite sure how to actually make use of it. Also, since the sync instance is already created when I open the database, I’m not sure how to attach anything to it before replication starts. I also tried using db.events.on('update', ...) and db.events.on('join', ...), but they seem inconsistent—sometimes they don’t trigger, it seems like a race condition, if the event already triggered in the middle of opening the database and setting the event listener. I’m still unsure about the right way to reliably wait for replication to complete before querying the database. Any further guidance would be really appreciated! |
So by "replication to complete", you are expecting both databases to have the same records? An orbitdb database is eventually consistent but when they reach consistency is never guaranteed. In regards to the "race condition", what happens if you print out the recordset from each orbitdb instance after opening? Are they the same? |
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With my current understanding, when opening an existing OrbitDB database, the
openmethod resolves successfully, but at that point, the database does not yet appear to be fully replicated.What is the correct way to wait for replication or synchronization to complete before accessing the database content?
Steps to Reproduce
await db.open().await db.all().Would appreciate any guidance on the recommended approach!
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