Expand description

The syncer downloads and verifies large numbers of blocks from peers to Zebra.

It is used when Zebra is a long way behind the current chain tip.


A helper type which holds a list of recent syncer response lengths. These sync lengths can be used to work out if Zebra has reached the end of the chain.

A helper type to determine if the synchronizer has likely reached the chain tip.


Errors that can occur when gossiping committed blocks


The default for the user-specified lookahead limit.

The expected maximum number of hashes in an ObtainTips or ExtendTips response.

A lower bound on the user-specified lookahead limit.

Controls how long we wait for a tips response to return.


Run continuously, gossiping newly verified block::Hashes to peers.

Logs Zebra’s estimated progress towards the chain tip every minute or so.